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-rw-r--r--arch/s390/kvm/Makefile4
-rw-r--r--arch/s390/kvm/diag.c19
-rw-r--r--arch/s390/kvm/gaccess.c726
-rw-r--r--arch/s390/kvm/gaccess.h379
-rw-r--r--arch/s390/kvm/guestdbg.c482
-rw-r--r--arch/s390/kvm/intercept.c222
-rw-r--r--arch/s390/kvm/interrupt.c400
-rw-r--r--arch/s390/kvm/kvm-s390.c554
-rw-r--r--arch/s390/kvm/kvm-s390.h73
-rw-r--r--arch/s390/kvm/priv.c357
-rw-r--r--arch/s390/kvm/sigp.c103
-rw-r--r--arch/s390/kvm/trace-s390.h43
-rw-r--r--arch/s390/kvm/trace.h99
13 files changed, 2963 insertions, 498 deletions
diff --git a/arch/s390/kvm/Makefile b/arch/s390/kvm/Makefile
index d3adb37e93a4..b3b553469650 100644
--- a/arch/s390/kvm/Makefile
+++ b/arch/s390/kvm/Makefile
@@ -11,5 +11,7 @@ common-objs = $(KVM)/kvm_main.o $(KVM)/eventfd.o $(KVM)/async_pf.o $(KVM)/irqch
ccflags-y := -Ivirt/kvm -Iarch/s390/kvm
-kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o diag.o
+kvm-objs := $(common-objs) kvm-s390.o intercept.o interrupt.o priv.o sigp.o
+kvm-objs += diag.o gaccess.o guestdbg.o
+
obj-$(CONFIG_KVM) += kvm.o
diff --git a/arch/s390/kvm/diag.c b/arch/s390/kvm/diag.c
index 08dfc839a6cf..0161675878a2 100644
--- a/arch/s390/kvm/diag.c
+++ b/arch/s390/kvm/diag.c
@@ -23,7 +23,7 @@
static int diag_release_pages(struct kvm_vcpu *vcpu)
{
unsigned long start, end;
- unsigned long prefix = vcpu->arch.sie_block->prefix;
+ unsigned long prefix = kvm_s390_get_prefix(vcpu);
start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];
end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096;
@@ -64,12 +64,12 @@ static int __diag_page_ref_service(struct kvm_vcpu *vcpu)
int rc;
u16 rx = (vcpu->arch.sie_block->ipa & 0xf0) >> 4;
u16 ry = (vcpu->arch.sie_block->ipa & 0x0f);
- unsigned long hva_token = KVM_HVA_ERR_BAD;
if (vcpu->run->s.regs.gprs[rx] & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- if (copy_from_guest(vcpu, &parm, vcpu->run->s.regs.gprs[rx], sizeof(parm)))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = read_guest(vcpu, vcpu->run->s.regs.gprs[rx], &parm, sizeof(parm));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
if (parm.parm_version != 2 || parm.parm_len < 5 || parm.code != 0x258)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -89,8 +89,7 @@ static int __diag_page_ref_service(struct kvm_vcpu *vcpu)
parm.token_addr & 7 || parm.zarch != 0x8000000000000000ULL)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- hva_token = gfn_to_hva(vcpu->kvm, gpa_to_gfn(parm.token_addr));
- if (kvm_is_error_hva(hva_token))
+ if (kvm_is_error_gpa(vcpu->kvm, parm.token_addr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
vcpu->arch.pfault_token = parm.token_addr;
@@ -167,23 +166,17 @@ static int __diag_ipl_functions(struct kvm_vcpu *vcpu)
VCPU_EVENT(vcpu, 5, "diag ipl functions, subcode %lx", subcode);
switch (subcode) {
- case 0:
- case 1:
- page_table_reset_pgste(current->mm, 0, TASK_SIZE);
- return -EOPNOTSUPP;
case 3:
vcpu->run->s390_reset_flags = KVM_S390_RESET_CLEAR;
- page_table_reset_pgste(current->mm, 0, TASK_SIZE);
break;
case 4:
vcpu->run->s390_reset_flags = 0;
- page_table_reset_pgste(current->mm, 0, TASK_SIZE);
break;
default:
return -EOPNOTSUPP;
}
- atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_vcpu_stop(vcpu);
vcpu->run->s390_reset_flags |= KVM_S390_RESET_SUBSYSTEM;
vcpu->run->s390_reset_flags |= KVM_S390_RESET_IPL;
vcpu->run->s390_reset_flags |= KVM_S390_RESET_CPU_INIT;
diff --git a/arch/s390/kvm/gaccess.c b/arch/s390/kvm/gaccess.c
new file mode 100644
index 000000000000..4653ac6e182b
--- /dev/null
+++ b/arch/s390/kvm/gaccess.c
@@ -0,0 +1,726 @@
+/*
+ * guest access functions
+ *
+ * Copyright IBM Corp. 2014
+ *
+ */
+
+#include <linux/vmalloc.h>
+#include <linux/err.h>
+#include <asm/pgtable.h>
+#include "kvm-s390.h"
+#include "gaccess.h"
+
+union asce {
+ unsigned long val;
+ struct {
+ unsigned long origin : 52; /* Region- or Segment-Table Origin */
+ unsigned long : 2;
+ unsigned long g : 1; /* Subspace Group Control */
+ unsigned long p : 1; /* Private Space Control */
+ unsigned long s : 1; /* Storage-Alteration-Event Control */
+ unsigned long x : 1; /* Space-Switch-Event Control */
+ unsigned long r : 1; /* Real-Space Control */
+ unsigned long : 1;
+ unsigned long dt : 2; /* Designation-Type Control */
+ unsigned long tl : 2; /* Region- or Segment-Table Length */
+ };
+};
+
+enum {
+ ASCE_TYPE_SEGMENT = 0,
+ ASCE_TYPE_REGION3 = 1,
+ ASCE_TYPE_REGION2 = 2,
+ ASCE_TYPE_REGION1 = 3
+};
+
+union region1_table_entry {
+ unsigned long val;
+ struct {
+ unsigned long rto: 52;/* Region-Table Origin */
+ unsigned long : 2;
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long : 1;
+ unsigned long tf : 2; /* Region-Second-Table Offset */
+ unsigned long i : 1; /* Region-Invalid Bit */
+ unsigned long : 1;
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long tl : 2; /* Region-Second-Table Length */
+ };
+};
+
+union region2_table_entry {
+ unsigned long val;
+ struct {
+ unsigned long rto: 52;/* Region-Table Origin */
+ unsigned long : 2;
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long : 1;
+ unsigned long tf : 2; /* Region-Third-Table Offset */
+ unsigned long i : 1; /* Region-Invalid Bit */
+ unsigned long : 1;
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long tl : 2; /* Region-Third-Table Length */
+ };
+};
+
+struct region3_table_entry_fc0 {
+ unsigned long sto: 52;/* Segment-Table Origin */
+ unsigned long : 1;
+ unsigned long fc : 1; /* Format-Control */
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long : 1;
+ unsigned long tf : 2; /* Segment-Table Offset */
+ unsigned long i : 1; /* Region-Invalid Bit */
+ unsigned long cr : 1; /* Common-Region Bit */
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long tl : 2; /* Segment-Table Length */
+};
+
+struct region3_table_entry_fc1 {
+ unsigned long rfaa : 33; /* Region-Frame Absolute Address */
+ unsigned long : 14;
+ unsigned long av : 1; /* ACCF-Validity Control */
+ unsigned long acc: 4; /* Access-Control Bits */
+ unsigned long f : 1; /* Fetch-Protection Bit */
+ unsigned long fc : 1; /* Format-Control */
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long co : 1; /* Change-Recording Override */
+ unsigned long : 2;
+ unsigned long i : 1; /* Region-Invalid Bit */
+ unsigned long cr : 1; /* Common-Region Bit */
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long : 2;
+};
+
+union region3_table_entry {
+ unsigned long val;
+ struct region3_table_entry_fc0 fc0;
+ struct region3_table_entry_fc1 fc1;
+ struct {
+ unsigned long : 53;
+ unsigned long fc : 1; /* Format-Control */
+ unsigned long : 4;
+ unsigned long i : 1; /* Region-Invalid Bit */
+ unsigned long cr : 1; /* Common-Region Bit */
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long : 2;
+ };
+};
+
+struct segment_entry_fc0 {
+ unsigned long pto: 53;/* Page-Table Origin */
+ unsigned long fc : 1; /* Format-Control */
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long : 3;
+ unsigned long i : 1; /* Segment-Invalid Bit */
+ unsigned long cs : 1; /* Common-Segment Bit */
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long : 2;
+};
+
+struct segment_entry_fc1 {
+ unsigned long sfaa : 44; /* Segment-Frame Absolute Address */
+ unsigned long : 3;
+ unsigned long av : 1; /* ACCF-Validity Control */
+ unsigned long acc: 4; /* Access-Control Bits */
+ unsigned long f : 1; /* Fetch-Protection Bit */
+ unsigned long fc : 1; /* Format-Control */
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long co : 1; /* Change-Recording Override */
+ unsigned long : 2;
+ unsigned long i : 1; /* Segment-Invalid Bit */
+ unsigned long cs : 1; /* Common-Segment Bit */
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long : 2;
+};
+
+union segment_table_entry {
+ unsigned long val;
+ struct segment_entry_fc0 fc0;
+ struct segment_entry_fc1 fc1;
+ struct {
+ unsigned long : 53;
+ unsigned long fc : 1; /* Format-Control */
+ unsigned long : 4;
+ unsigned long i : 1; /* Segment-Invalid Bit */
+ unsigned long cs : 1; /* Common-Segment Bit */
+ unsigned long tt : 2; /* Table-Type Bits */
+ unsigned long : 2;
+ };
+};
+
+enum {
+ TABLE_TYPE_SEGMENT = 0,
+ TABLE_TYPE_REGION3 = 1,
+ TABLE_TYPE_REGION2 = 2,
+ TABLE_TYPE_REGION1 = 3
+};
+
+union page_table_entry {
+ unsigned long val;
+ struct {
+ unsigned long pfra : 52; /* Page-Frame Real Address */
+ unsigned long z : 1; /* Zero Bit */
+ unsigned long i : 1; /* Page-Invalid Bit */
+ unsigned long p : 1; /* DAT-Protection Bit */
+ unsigned long co : 1; /* Change-Recording Override */
+ unsigned long : 8;
+ };
+};
+
+/*
+ * vaddress union in order to easily decode a virtual address into its
+ * region first index, region second index etc. parts.
+ */
+union vaddress {
+ unsigned long addr;
+ struct {
+ unsigned long rfx : 11;
+ unsigned long rsx : 11;
+ unsigned long rtx : 11;
+ unsigned long sx : 11;
+ unsigned long px : 8;
+ unsigned long bx : 12;
+ };
+ struct {
+ unsigned long rfx01 : 2;
+ unsigned long : 9;
+ unsigned long rsx01 : 2;
+ unsigned long : 9;
+ unsigned long rtx01 : 2;
+ unsigned long : 9;
+ unsigned long sx01 : 2;
+ unsigned long : 29;
+ };
+};
+
+/*
+ * raddress union which will contain the result (real or absolute address)
+ * after a page table walk. The rfaa, sfaa and pfra members are used to
+ * simply assign them the value of a region, segment or page table entry.
+ */
+union raddress {
+ unsigned long addr;
+ unsigned long rfaa : 33; /* Region-Frame Absolute Address */
+ unsigned long sfaa : 44; /* Segment-Frame Absolute Address */
+ unsigned long pfra : 52; /* Page-Frame Real Address */
+};
+
+static int ipte_lock_count;
+static DEFINE_MUTEX(ipte_mutex);
+
+int ipte_lock_held(struct kvm_vcpu *vcpu)
+{
+ union ipte_control *ic = &vcpu->kvm->arch.sca->ipte_control;
+
+ if (vcpu->arch.sie_block->eca & 1)
+ return ic->kh != 0;
+ return ipte_lock_count != 0;
+}
+
+static void ipte_lock_simple(struct kvm_vcpu *vcpu)
+{
+ union ipte_control old, new, *ic;
+
+ mutex_lock(&ipte_mutex);
+ ipte_lock_count++;
+ if (ipte_lock_count > 1)
+ goto out;
+ ic = &vcpu->kvm->arch.sca->ipte_control;
+ do {
+ old = ACCESS_ONCE(*ic);
+ while (old.k) {
+ cond_resched();
+ old = ACCESS_ONCE(*ic);
+ }
+ new = old;
+ new.k = 1;
+ } while (cmpxchg(&ic->val, old.val, new.val) != old.val);
+out:
+ mutex_unlock(&ipte_mutex);
+}
+
+static void ipte_unlock_simple(struct kvm_vcpu *vcpu)
+{
+ union ipte_control old, new, *ic;
+
+ mutex_lock(&ipte_mutex);
+ ipte_lock_count--;
+ if (ipte_lock_count)
+ goto out;
+ ic = &vcpu->kvm->arch.sca->ipte_control;
+ do {
+ new = old = ACCESS_ONCE(*ic);
+ new.k = 0;
+ } while (cmpxchg(&ic->val, old.val, new.val) != old.val);
+ if (!ipte_lock_count)
+ wake_up(&vcpu->kvm->arch.ipte_wq);
+out:
+ mutex_unlock(&ipte_mutex);
+}
+
+static void ipte_lock_siif(struct kvm_vcpu *vcpu)
+{
+ union ipte_control old, new, *ic;
+
+ ic = &vcpu->kvm->arch.sca->ipte_control;
+ do {
+ old = ACCESS_ONCE(*ic);
+ while (old.kg) {
+ cond_resched();
+ old = ACCESS_ONCE(*ic);
+ }
+ new = old;
+ new.k = 1;
+ new.kh++;
+ } while (cmpxchg(&ic->val, old.val, new.val) != old.val);
+}
+
+static void ipte_unlock_siif(struct kvm_vcpu *vcpu)
+{
+ union ipte_control old, new, *ic;
+
+ ic = &vcpu->kvm->arch.sca->ipte_control;
+ do {
+ new = old = ACCESS_ONCE(*ic);
+ new.kh--;
+ if (!new.kh)
+ new.k = 0;
+ } while (cmpxchg(&ic->val, old.val, new.val) != old.val);
+ if (!new.kh)
+ wake_up(&vcpu->kvm->arch.ipte_wq);
+}
+
+void ipte_lock(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.sie_block->eca & 1)
+ ipte_lock_siif(vcpu);
+ else
+ ipte_lock_simple(vcpu);
+}
+
+void ipte_unlock(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.sie_block->eca & 1)
+ ipte_unlock_siif(vcpu);
+ else
+ ipte_unlock_simple(vcpu);
+}
+
+static unsigned long get_vcpu_asce(struct kvm_vcpu *vcpu)
+{
+ switch (psw_bits(vcpu->arch.sie_block->gpsw).as) {
+ case PSW_AS_PRIMARY:
+ return vcpu->arch.sie_block->gcr[1];
+ case PSW_AS_SECONDARY:
+ return vcpu->arch.sie_block->gcr[7];
+ case PSW_AS_HOME:
+ return vcpu->arch.sie_block->gcr[13];
+ }
+ return 0;
+}
+
+static int deref_table(struct kvm *kvm, unsigned long gpa, unsigned long *val)
+{
+ return kvm_read_guest(kvm, gpa, val, sizeof(*val));
+}
+
+/**
+ * guest_translate - translate a guest virtual into a guest absolute address
+ * @vcpu: virtual cpu
+ * @gva: guest virtual address
+ * @gpa: points to where guest physical (absolute) address should be stored
+ * @write: indicates if access is a write access
+ *
+ * Translate a guest virtual address into a guest absolute address by means
+ * of dynamic address translation as specified by the architecuture.
+ * If the resulting absolute address is not available in the configuration
+ * an addressing exception is indicated and @gpa will not be changed.
+ *
+ * Returns: - zero on success; @gpa contains the resulting absolute address
+ * - a negative value if guest access failed due to e.g. broken
+ * guest mapping
+ * - a positve value if an access exception happened. In this case
+ * the returned value is the program interruption code as defined
+ * by the architecture
+ */
+static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva,
+ unsigned long *gpa, int write)
+{
+ union vaddress vaddr = {.addr = gva};
+ union raddress raddr = {.addr = gva};
+ union page_table_entry pte;
+ int dat_protection = 0;
+ union ctlreg0 ctlreg0;
+ unsigned long ptr;
+ int edat1, edat2;
+ union asce asce;
+
+ ctlreg0.val = vcpu->arch.sie_block->gcr[0];
+ edat1 = ctlreg0.edat && test_vfacility(8);
+ edat2 = edat1 && test_vfacility(78);
+ asce.val = get_vcpu_asce(vcpu);
+ if (asce.r)
+ goto real_address;
+ ptr = asce.origin * 4096;
+ switch (asce.dt) {
+ case ASCE_TYPE_REGION1:
+ if (vaddr.rfx01 > asce.tl)
+ return PGM_REGION_FIRST_TRANS;
+ ptr += vaddr.rfx * 8;
+ break;
+ case ASCE_TYPE_REGION2:
+ if (vaddr.rfx)
+ return PGM_ASCE_TYPE;
+ if (vaddr.rsx01 > asce.tl)
+ return PGM_REGION_SECOND_TRANS;
+ ptr += vaddr.rsx * 8;
+ break;
+ case ASCE_TYPE_REGION3:
+ if (vaddr.rfx || vaddr.rsx)
+ return PGM_ASCE_TYPE;
+ if (vaddr.rtx01 > asce.tl)
+ return PGM_REGION_THIRD_TRANS;
+ ptr += vaddr.rtx * 8;
+ break;
+ case ASCE_TYPE_SEGMENT:
+ if (vaddr.rfx || vaddr.rsx || vaddr.rtx)
+ return PGM_ASCE_TYPE;
+ if (vaddr.sx01 > asce.tl)
+ return PGM_SEGMENT_TRANSLATION;
+ ptr += vaddr.sx * 8;
+ break;
+ }
+ switch (asce.dt) {
+ case ASCE_TYPE_REGION1: {
+ union region1_table_entry rfte;
+
+ if (kvm_is_error_gpa(vcpu->kvm, ptr))
+ return PGM_ADDRESSING;
+ if (deref_table(vcpu->kvm, ptr, &rfte.val))
+ return -EFAULT;
+ if (rfte.i)
+ return PGM_REGION_FIRST_TRANS;
+ if (rfte.tt != TABLE_TYPE_REGION1)
+ return PGM_TRANSLATION_SPEC;
+ if (vaddr.rsx01 < rfte.tf || vaddr.rsx01 > rfte.tl)
+ return PGM_REGION_SECOND_TRANS;
+ if (edat1)
+ dat_protection |= rfte.p;
+ ptr = rfte.rto * 4096 + vaddr.rsx * 8;
+ }
+ /* fallthrough */
+ case ASCE_TYPE_REGION2: {
+ union region2_table_entry rste;
+
+ if (kvm_is_error_gpa(vcpu->kvm, ptr))
+ return PGM_ADDRESSING;
+ if (deref_table(vcpu->kvm, ptr, &rste.val))
+ return -EFAULT;
+ if (rste.i)
+ return PGM_REGION_SECOND_TRANS;
+ if (rste.tt != TABLE_TYPE_REGION2)
+ return PGM_TRANSLATION_SPEC;
+ if (vaddr.rtx01 < rste.tf || vaddr.rtx01 > rste.tl)
+ return PGM_REGION_THIRD_TRANS;
+ if (edat1)
+ dat_protection |= rste.p;
+ ptr = rste.rto * 4096 + vaddr.rtx * 8;
+ }
+ /* fallthrough */
+ case ASCE_TYPE_REGION3: {
+ union region3_table_entry rtte;
+
+ if (kvm_is_error_gpa(vcpu->kvm, ptr))
+ return PGM_ADDRESSING;
+ if (deref_table(vcpu->kvm, ptr, &rtte.val))
+ return -EFAULT;
+ if (rtte.i)
+ return PGM_REGION_THIRD_TRANS;
+ if (rtte.tt != TABLE_TYPE_REGION3)
+ return PGM_TRANSLATION_SPEC;
+ if (rtte.cr && asce.p && edat2)
+ return PGM_TRANSLATION_SPEC;
+ if (rtte.fc && edat2) {
+ dat_protection |= rtte.fc1.p;
+ raddr.rfaa = rtte.fc1.rfaa;
+ goto absolute_address;
+ }
+ if (vaddr.sx01 < rtte.fc0.tf)
+ return PGM_SEGMENT_TRANSLATION;
+ if (vaddr.sx01 > rtte.fc0.tl)
+ return PGM_SEGMENT_TRANSLATION;
+ if (edat1)
+ dat_protection |= rtte.fc0.p;
+ ptr = rtte.fc0.sto * 4096 + vaddr.sx * 8;
+ }
+ /* fallthrough */
+ case ASCE_TYPE_SEGMENT: {
+ union segment_table_entry ste;
+
+ if (kvm_is_error_gpa(vcpu->kvm, ptr))
+ return PGM_ADDRESSING;
+ if (deref_table(vcpu->kvm, ptr, &ste.val))
+ return -EFAULT;
+ if (ste.i)
+ return PGM_SEGMENT_TRANSLATION;
+ if (ste.tt != TABLE_TYPE_SEGMENT)
+ return PGM_TRANSLATION_SPEC;
+ if (ste.cs && asce.p)
+ return PGM_TRANSLATION_SPEC;
+ if (ste.fc && edat1) {
+ dat_protection |= ste.fc1.p;
+ raddr.sfaa = ste.fc1.sfaa;
+ goto absolute_address;
+ }
+ dat_protection |= ste.fc0.p;
+ ptr = ste.fc0.pto * 2048 + vaddr.px * 8;
+ }
+ }
+ if (kvm_is_error_gpa(vcpu->kvm, ptr))
+ return PGM_ADDRESSING;
+ if (deref_table(vcpu->kvm, ptr, &pte.val))
+ return -EFAULT;
+ if (pte.i)
+ return PGM_PAGE_TRANSLATION;
+ if (pte.z)
+ return PGM_TRANSLATION_SPEC;
+ if (pte.co && !edat1)
+ return PGM_TRANSLATION_SPEC;
+ dat_protection |= pte.p;
+ raddr.pfra = pte.pfra;
+real_address:
+ raddr.addr = kvm_s390_real_to_abs(vcpu, raddr.addr);
+absolute_address:
+ if (write && dat_protection)
+ return PGM_PROTECTION;
+ if (kvm_is_error_gpa(vcpu->kvm, raddr.addr))
+ return PGM_ADDRESSING;
+ *gpa = raddr.addr;
+ return 0;
+}
+
+static inline int is_low_address(unsigned long ga)
+{
+ /* Check for address ranges 0..511 and 4096..4607 */
+ return (ga & ~0x11fful) == 0;
+}
+
+static int low_address_protection_enabled(struct kvm_vcpu *vcpu)
+{
+ union ctlreg0 ctlreg0 = {.val = vcpu->arch.sie_block->gcr[0]};
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+ union asce asce;
+
+ if (!ctlreg0.lap)
+ return 0;
+ asce.val = get_vcpu_asce(vcpu);
+ if (psw_bits(*psw).t && asce.p)
+ return 0;
+ return 1;
+}
+
+struct trans_exc_code_bits {
+ unsigned long addr : 52; /* Translation-exception Address */
+ unsigned long fsi : 2; /* Access Exception Fetch/Store Indication */
+ unsigned long : 7;
+ unsigned long b61 : 1;
+ unsigned long as : 2; /* ASCE Identifier */
+};
+
+enum {
+ FSI_UNKNOWN = 0, /* Unknown wether fetch or store */
+ FSI_STORE = 1, /* Exception was due to store operation */
+ FSI_FETCH = 2 /* Exception was due to fetch operation */
+};
+
+static int guest_page_range(struct kvm_vcpu *vcpu, unsigned long ga,
+ unsigned long *pages, unsigned long nr_pages,
+ int write)
+{
+ struct kvm_s390_pgm_info *pgm = &vcpu->arch.pgm;
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+ struct trans_exc_code_bits *tec_bits;
+ int lap_enabled, rc;
+
+ memset(pgm, 0, sizeof(*pgm));
+ tec_bits = (struct trans_exc_code_bits *)&pgm->trans_exc_code;
+ tec_bits->fsi = write ? FSI_STORE : FSI_FETCH;
+ tec_bits->as = psw_bits(*psw).as;
+ lap_enabled = low_address_protection_enabled(vcpu);
+ while (nr_pages) {
+ ga = kvm_s390_logical_to_effective(vcpu, ga);
+ tec_bits->addr = ga >> PAGE_SHIFT;
+ if (write && lap_enabled && is_low_address(ga)) {
+ pgm->code = PGM_PROTECTION;
+ return pgm->code;
+ }
+ ga &= PAGE_MASK;
+ if (psw_bits(*psw).t) {
+ rc = guest_translate(vcpu, ga, pages, write);
+ if (rc < 0)
+ return rc;
+ if (rc == PGM_PROTECTION)
+ tec_bits->b61 = 1;
+ if (rc)
+ pgm->code = rc;
+ } else {
+ *pages = kvm_s390_real_to_abs(vcpu, ga);
+ if (kvm_is_error_gpa(vcpu->kvm, *pages))
+ pgm->code = PGM_ADDRESSING;
+ }
+ if (pgm->code)
+ return pgm->code;
+ ga += PAGE_SIZE;
+ pages++;
+ nr_pages--;
+ }
+ return 0;
+}
+
+int access_guest(struct kvm_vcpu *vcpu, unsigned long ga, void *data,
+ unsigned long len, int write)
+{
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+ unsigned long _len, nr_pages, gpa, idx;
+ unsigned long pages_array[2];
+ unsigned long *pages;
+ int need_ipte_lock;
+ union asce asce;
+ int rc;
+
+ if (!len)
+ return 0;
+ /* Access register mode is not supported yet. */
+ if (psw_bits(*psw).t && psw_bits(*psw).as == PSW_AS_ACCREG)
+ return -EOPNOTSUPP;
+ nr_pages = (((ga & ~PAGE_MASK) + len - 1) >> PAGE_SHIFT) + 1;
+ pages = pages_array;
+ if (nr_pages > ARRAY_SIZE(pages_array))
+ pages = vmalloc(nr_pages * sizeof(unsigned long));
+ if (!pages)
+ return -ENOMEM;
+ asce.val = get_vcpu_asce(vcpu);
+ need_ipte_lock = psw_bits(*psw).t && !asce.r;
+ if (need_ipte_lock)
+ ipte_lock(vcpu);
+ rc = guest_page_range(vcpu, ga, pages, nr_pages, write);
+ for (idx = 0; idx < nr_pages && !rc; idx++) {
+ gpa = *(pages + idx) + (ga & ~PAGE_MASK);
+ _len = min(PAGE_SIZE - (gpa & ~PAGE_MASK), len);
+ if (write)
+ rc = kvm_write_guest(vcpu->kvm, gpa, data, _len);
+ else
+ rc = kvm_read_guest(vcpu->kvm, gpa, data, _len);
+ len -= _len;
+ ga += _len;
+ data += _len;
+ }
+ if (need_ipte_lock)
+ ipte_unlock(vcpu);
+ if (nr_pages > ARRAY_SIZE(pages_array))
+ vfree(pages);
+ return rc;
+}
+
+int access_guest_real(struct kvm_vcpu *vcpu, unsigned long gra,
+ void *data, unsigned long len, int write)
+{
+ unsigned long _len, gpa;
+ int rc = 0;
+
+ while (len && !rc) {
+ gpa = kvm_s390_real_to_abs(vcpu, gra);
+ _len = min(PAGE_SIZE - (gpa & ~PAGE_MASK), len);
+ if (write)
+ rc = write_guest_abs(vcpu, gpa, data, _len);
+ else
+ rc = read_guest_abs(vcpu, gpa, data, _len);
+ len -= _len;
+ gra += _len;
+ data += _len;
+ }
+ return rc;
+}
+
+/**
+ * guest_translate_address - translate guest logical into guest absolute address
+ *
+ * Parameter semantics are the same as the ones from guest_translate.
+ * The memory contents at the guest address are not changed.
+ *
+ * Note: The IPTE lock is not taken during this function, so the caller
+ * has to take care of this.
+ */
+int guest_translate_address(struct kvm_vcpu *vcpu, unsigned long gva,
+ unsigned long *gpa, int write)
+{
+ struct kvm_s390_pgm_info *pgm = &vcpu->arch.pgm;
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+ struct trans_exc_code_bits *tec;
+ union asce asce;
+ int rc;
+
+ /* Access register mode is not supported yet. */
+ if (psw_bits(*psw).t && psw_bits(*psw).as == PSW_AS_ACCREG)
+ return -EOPNOTSUPP;
+
+ gva = kvm_s390_logical_to_effective(vcpu, gva);
+ memset(pgm, 0, sizeof(*pgm));
+ tec = (struct trans_exc_code_bits *)&pgm->trans_exc_code;
+ tec->as = psw_bits(*psw).as;
+ tec->fsi = write ? FSI_STORE : FSI_FETCH;
+ tec->addr = gva >> PAGE_SHIFT;
+ if (is_low_address(gva) && low_address_protection_enabled(vcpu)) {
+ if (write) {
+ rc = pgm->code = PGM_PROTECTION;
+ return rc;
+ }
+ }
+
+ asce.val = get_vcpu_asce(vcpu);
+ if (psw_bits(*psw).t && !asce.r) { /* Use DAT? */
+ rc = guest_translate(vcpu, gva, gpa, write);
+ if (rc > 0) {
+ if (rc == PGM_PROTECTION)
+ tec->b61 = 1;
+ pgm->code = rc;
+ }
+ } else {
+ rc = 0;
+ *gpa = kvm_s390_real_to_abs(vcpu, gva);
+ if (kvm_is_error_gpa(vcpu->kvm, *gpa))
+ rc = pgm->code = PGM_ADDRESSING;
+ }
+
+ return rc;
+}
+
+/**
+ * kvm_s390_check_low_addr_protection - check for low-address protection
+ * @ga: Guest address
+ *
+ * Checks whether an address is subject to low-address protection and set
+ * up vcpu->arch.pgm accordingly if necessary.
+ *
+ * Return: 0 if no protection exception, or PGM_PROTECTION if protected.
+ */
+int kvm_s390_check_low_addr_protection(struct kvm_vcpu *vcpu, unsigned long ga)
+{
+ struct kvm_s390_pgm_info *pgm = &vcpu->arch.pgm;
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+ struct trans_exc_code_bits *tec_bits;
+
+ if (!is_low_address(ga) || !low_address_protection_enabled(vcpu))
+ return 0;
+
+ memset(pgm, 0, sizeof(*pgm));
+ tec_bits = (struct trans_exc_code_bits *)&pgm->trans_exc_code;
+ tec_bits->fsi = FSI_STORE;
+ tec_bits->as = psw_bits(*psw).as;
+ tec_bits->addr = ga >> PAGE_SHIFT;
+ pgm->code = PGM_PROTECTION;
+
+ return pgm->code;
+}
diff --git a/arch/s390/kvm/gaccess.h b/arch/s390/kvm/gaccess.h
index 374a439ccc60..0149cf15058a 100644
--- a/arch/s390/kvm/gaccess.h
+++ b/arch/s390/kvm/gaccess.h
@@ -1,7 +1,7 @@
/*
* access guest memory
*
- * Copyright IBM Corp. 2008, 2009
+ * Copyright IBM Corp. 2008, 2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
@@ -15,100 +15,321 @@
#include <linux/compiler.h>
#include <linux/kvm_host.h>
-#include <asm/uaccess.h>
+#include <linux/uaccess.h>
+#include <linux/ptrace.h>
#include "kvm-s390.h"
-/* Convert real to absolute address by applying the prefix of the CPU */
+/**
+ * kvm_s390_real_to_abs - convert guest real address to guest absolute address
+ * @vcpu - guest virtual cpu
+ * @gra - guest real address
+ *
+ * Returns the guest absolute address that corresponds to the passed guest real
+ * address @gra of a virtual guest cpu by applying its prefix.
+ */
static inline unsigned long kvm_s390_real_to_abs(struct kvm_vcpu *vcpu,
- unsigned long gaddr)
+ unsigned long gra)
{
- unsigned long prefix = vcpu->arch.sie_block->prefix;
- if (gaddr < 2 * PAGE_SIZE)
- gaddr += prefix;
- else if (gaddr >= prefix && gaddr < prefix + 2 * PAGE_SIZE)
- gaddr -= prefix;
- return gaddr;
+ unsigned long prefix = kvm_s390_get_prefix(vcpu);
+
+ if (gra < 2 * PAGE_SIZE)
+ gra += prefix;
+ else if (gra >= prefix && gra < prefix + 2 * PAGE_SIZE)
+ gra -= prefix;
+ return gra;
}
-static inline void __user *__gptr_to_uptr(struct kvm_vcpu *vcpu,
- void __user *gptr,
- int prefixing)
+/**
+ * kvm_s390_logical_to_effective - convert guest logical to effective address
+ * @vcpu: guest virtual cpu
+ * @ga: guest logical address
+ *
+ * Convert a guest vcpu logical address to a guest vcpu effective address by
+ * applying the rules of the vcpu's addressing mode defined by PSW bits 31
+ * and 32 (extendended/basic addressing mode).
+ *
+ * Depending on the vcpu's addressing mode the upper 40 bits (24 bit addressing
+ * mode), 33 bits (31 bit addressing mode) or no bits (64 bit addressing mode)
+ * of @ga will be zeroed and the remaining bits will be returned.
+ */
+static inline unsigned long kvm_s390_logical_to_effective(struct kvm_vcpu *vcpu,
+ unsigned long ga)
{
- unsigned long gaddr = (unsigned long) gptr;
- unsigned long uaddr;
-
- if (prefixing)
- gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
- uaddr = gmap_fault(gaddr, vcpu->arch.gmap);
- if (IS_ERR_VALUE(uaddr))
- uaddr = -EFAULT;
- return (void __user *)uaddr;
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+
+ if (psw_bits(*psw).eaba == PSW_AMODE_64BIT)
+ return ga;
+ if (psw_bits(*psw).eaba == PSW_AMODE_31BIT)
+ return ga & ((1UL << 31) - 1);
+ return ga & ((1UL << 24) - 1);
}
-#define get_guest(vcpu, x, gptr) \
-({ \
- __typeof__(gptr) __uptr = __gptr_to_uptr(vcpu, gptr, 1);\
- int __mask = sizeof(__typeof__(*(gptr))) - 1; \
- int __ret; \
- \
- if (IS_ERR((void __force *)__uptr)) { \
- __ret = PTR_ERR((void __force *)__uptr); \
- } else { \
- BUG_ON((unsigned long)__uptr & __mask); \
- __ret = get_user(x, __uptr); \
- } \
- __ret; \
-})
+/*
+ * put_guest_lc, read_guest_lc and write_guest_lc are guest access functions
+ * which shall only be used to access the lowcore of a vcpu.
+ * These functions should be used for e.g. interrupt handlers where no
+ * guest memory access protection facilities, like key or low address
+ * protection, are applicable.
+ * At a later point guest vcpu lowcore access should happen via pinned
+ * prefix pages, so that these pages can be accessed directly via the
+ * kernel mapping. All of these *_lc functions can be removed then.
+ */
-#define put_guest(vcpu, x, gptr) \
+/**
+ * put_guest_lc - write a simple variable to a guest vcpu's lowcore
+ * @vcpu: virtual cpu
+ * @x: value to copy to guest
+ * @gra: vcpu's destination guest real address
+ *
+ * Copies a simple value from kernel space to a guest vcpu's lowcore.
+ * The size of the variable may be 1, 2, 4 or 8 bytes. The destination
+ * must be located in the vcpu's lowcore. Otherwise the result is undefined.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * Note: an error indicates that either the kernel is out of memory or
+ * the guest memory mapping is broken. In any case the best solution
+ * would be to terminate the guest.
+ * It is wrong to inject a guest exception.
+ */
+#define put_guest_lc(vcpu, x, gra) \
({ \
- __typeof__(gptr) __uptr = __gptr_to_uptr(vcpu, gptr, 1);\
- int __mask = sizeof(__typeof__(*(gptr))) - 1; \
- int __ret; \
+ struct kvm_vcpu *__vcpu = (vcpu); \
+ __typeof__(*(gra)) __x = (x); \
+ unsigned long __gpa; \
\
- if (IS_ERR((void __force *)__uptr)) { \
- __ret = PTR_ERR((void __force *)__uptr); \
- } else { \
- BUG_ON((unsigned long)__uptr & __mask); \
- __ret = put_user(x, __uptr); \
- } \
- __ret; \
+ __gpa = (unsigned long)(gra); \
+ __gpa += kvm_s390_get_prefix(__vcpu); \
+ kvm_write_guest(__vcpu->kvm, __gpa, &__x, sizeof(__x)); \
})
-static inline int __copy_guest(struct kvm_vcpu *vcpu, unsigned long to,
- unsigned long from, unsigned long len,
- int to_guest, int prefixing)
+/**
+ * write_guest_lc - copy data from kernel space to guest vcpu's lowcore
+ * @vcpu: virtual cpu
+ * @gra: vcpu's source guest real address
+ * @data: source address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy data from kernel space to guest vcpu's lowcore. The entire range must
+ * be located within the vcpu's lowcore, otherwise the result is undefined.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * Note: an error indicates that either the kernel is out of memory or
+ * the guest memory mapping is broken. In any case the best solution
+ * would be to terminate the guest.
+ * It is wrong to inject a guest exception.
+ */
+static inline __must_check
+int write_guest_lc(struct kvm_vcpu *vcpu, unsigned long gra, void *data,
+ unsigned long len)
+{
+ unsigned long gpa = gra + kvm_s390_get_prefix(vcpu);
+
+ return kvm_write_guest(vcpu->kvm, gpa, data, len);
+}
+
+/**
+ * read_guest_lc - copy data from guest vcpu's lowcore to kernel space
+ * @vcpu: virtual cpu
+ * @gra: vcpu's source guest real address
+ * @data: destination address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy data from guest vcpu's lowcore to kernel space. The entire range must
+ * be located within the vcpu's lowcore, otherwise the result is undefined.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * Note: an error indicates that either the kernel is out of memory or
+ * the guest memory mapping is broken. In any case the best solution
+ * would be to terminate the guest.
+ * It is wrong to inject a guest exception.
+ */
+static inline __must_check
+int read_guest_lc(struct kvm_vcpu *vcpu, unsigned long gra, void *data,
+ unsigned long len)
+{
+ unsigned long gpa = gra + kvm_s390_get_prefix(vcpu);
+
+ return kvm_read_guest(vcpu->kvm, gpa, data, len);
+}
+
+int guest_translate_address(struct kvm_vcpu *vcpu, unsigned long gva,
+ unsigned long *gpa, int write);
+
+int access_guest(struct kvm_vcpu *vcpu, unsigned long ga, void *data,
+ unsigned long len, int write);
+
+int access_guest_real(struct kvm_vcpu *vcpu, unsigned long gra,
+ void *data, unsigned long len, int write);
+
+/**
+ * write_guest - copy data from kernel space to guest space
+ * @vcpu: virtual cpu
+ * @ga: guest address
+ * @data: source address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @data (kernel space) to @ga (guest address).
+ * In order to copy data to guest space the PSW of the vcpu is inspected:
+ * If DAT is off data will be copied to guest real or absolute memory.
+ * If DAT is on data will be copied to the address space as specified by
+ * the address space bits of the PSW:
+ * Primary, secondory or home space (access register mode is currently not
+ * implemented).
+ * The addressing mode of the PSW is also inspected, so that address wrap
+ * around is taken into account for 24-, 31- and 64-bit addressing mode,
+ * if the to be copied data crosses page boundaries in guest address space.
+ * In addition also low address and DAT protection are inspected before
+ * copying any data (key protection is currently not implemented).
+ *
+ * This function modifies the 'struct kvm_s390_pgm_info pgm' member of @vcpu.
+ * In case of an access exception (e.g. protection exception) pgm will contain
+ * all data necessary so that a subsequent call to 'kvm_s390_inject_prog_vcpu()'
+ * will inject a correct exception into the guest.
+ * If no access exception happened, the contents of pgm are undefined when
+ * this function returns.
+ *
+ * Returns: - zero on success
+ * - a negative value if e.g. the guest mapping is broken or in
+ * case of out-of-memory. In this case the contents of pgm are
+ * undefined. Also parts of @data may have been copied to guest
+ * space.
+ * - a positive value if an access exception happened. In this case
+ * the returned value is the program interruption code and the
+ * contents of pgm may be used to inject an exception into the
+ * guest. No data has been copied to guest space.
+ *
+ * Note: in case an access exception is recognized no data has been copied to
+ * guest space (this is also true, if the to be copied data would cross
+ * one or more page boundaries in guest space).
+ * Therefore this function may be used for nullifying and suppressing
+ * instruction emulation.
+ * It may also be used for terminating instructions, if it is undefined
+ * if data has been changed in guest space in case of an exception.
+ */
+static inline __must_check
+int write_guest(struct kvm_vcpu *vcpu, unsigned long ga, void *data,
+ unsigned long len)
+{
+ return access_guest(vcpu, ga, data, len, 1);
+}
+
+/**
+ * read_guest - copy data from guest space to kernel space
+ * @vcpu: virtual cpu
+ * @ga: guest address
+ * @data: destination address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @ga (guest address) to @data (kernel space).
+ *
+ * The behaviour of read_guest is identical to write_guest, except that
+ * data will be copied from guest space to kernel space.
+ */
+static inline __must_check
+int read_guest(struct kvm_vcpu *vcpu, unsigned long ga, void *data,
+ unsigned long len)
+{
+ return access_guest(vcpu, ga, data, len, 0);
+}
+
+/**
+ * write_guest_abs - copy data from kernel space to guest space absolute
+ * @vcpu: virtual cpu
+ * @gpa: guest physical (absolute) address
+ * @data: source address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @data (kernel space) to @gpa (guest absolute address).
+ * It is up to the caller to ensure that the entire guest memory range is
+ * valid memory before calling this function.
+ * Guest low address and key protection are not checked.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * If an error occurs data may have been copied partially to guest memory.
+ */
+static inline __must_check
+int write_guest_abs(struct kvm_vcpu *vcpu, unsigned long gpa, void *data,
+ unsigned long len)
+{
+ return kvm_write_guest(vcpu->kvm, gpa, data, len);
+}
+
+/**
+ * read_guest_abs - copy data from guest space absolute to kernel space
+ * @vcpu: virtual cpu
+ * @gpa: guest physical (absolute) address
+ * @data: destination address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @gpa (guest absolute address) to @data (kernel space).
+ * It is up to the caller to ensure that the entire guest memory range is
+ * valid memory before calling this function.
+ * Guest key protection is not checked.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * If an error occurs data may have been copied partially to kernel space.
+ */
+static inline __must_check
+int read_guest_abs(struct kvm_vcpu *vcpu, unsigned long gpa, void *data,
+ unsigned long len)
+{
+ return kvm_read_guest(vcpu->kvm, gpa, data, len);
+}
+
+/**
+ * write_guest_real - copy data from kernel space to guest space real
+ * @vcpu: virtual cpu
+ * @gra: guest real address
+ * @data: source address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @data (kernel space) to @gra (guest real address).
+ * It is up to the caller to ensure that the entire guest memory range is
+ * valid memory before calling this function.
+ * Guest low address and key protection are not checked.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * If an error occurs data may have been copied partially to guest memory.
+ */
+static inline __must_check
+int write_guest_real(struct kvm_vcpu *vcpu, unsigned long gra, void *data,
+ unsigned long len)
+{
+ return access_guest_real(vcpu, gra, data, len, 1);
+}
+
+/**
+ * read_guest_real - copy data from guest space real to kernel space
+ * @vcpu: virtual cpu
+ * @gra: guest real address
+ * @data: destination address in kernel space
+ * @len: number of bytes to copy
+ *
+ * Copy @len bytes from @gra (guest real address) to @data (kernel space).
+ * It is up to the caller to ensure that the entire guest memory range is
+ * valid memory before calling this function.
+ * Guest key protection is not checked.
+ *
+ * Returns zero on success or -EFAULT on error.
+ *
+ * If an error occurs data may have been copied partially to kernel space.
+ */
+static inline __must_check
+int read_guest_real(struct kvm_vcpu *vcpu, unsigned long gra, void *data,
+ unsigned long len)
{
- unsigned long _len, rc;
- void __user *uptr;
-
- while (len) {
- uptr = to_guest ? (void __user *)to : (void __user *)from;
- uptr = __gptr_to_uptr(vcpu, uptr, prefixing);
- if (IS_ERR((void __force *)uptr))
- return -EFAULT;
- _len = PAGE_SIZE - ((unsigned long)uptr & (PAGE_SIZE - 1));
- _len = min(_len, len);
- if (to_guest)
- rc = copy_to_user((void __user *) uptr, (void *)from, _len);
- else
- rc = copy_from_user((void *)to, (void __user *)uptr, _len);
- if (rc)
- return -EFAULT;
- len -= _len;
- from += _len;
- to += _len;
- }
- return 0;
+ return access_guest_real(vcpu, gra, data, len, 0);
}
-#define copy_to_guest(vcpu, to, from, size) \
- __copy_guest(vcpu, to, (unsigned long)from, size, 1, 1)
-#define copy_from_guest(vcpu, to, from, size) \
- __copy_guest(vcpu, (unsigned long)to, from, size, 0, 1)
-#define copy_to_guest_absolute(vcpu, to, from, size) \
- __copy_guest(vcpu, to, (unsigned long)from, size, 1, 0)
-#define copy_from_guest_absolute(vcpu, to, from, size) \
- __copy_guest(vcpu, (unsigned long)to, from, size, 0, 0)
+void ipte_lock(struct kvm_vcpu *vcpu);
+void ipte_unlock(struct kvm_vcpu *vcpu);
+int ipte_lock_held(struct kvm_vcpu *vcpu);
+int kvm_s390_check_low_addr_protection(struct kvm_vcpu *vcpu, unsigned long ga);
#endif /* __KVM_S390_GACCESS_H */
diff --git a/arch/s390/kvm/guestdbg.c b/arch/s390/kvm/guestdbg.c
new file mode 100644
index 000000000000..3e8d4092ce30
--- /dev/null
+++ b/arch/s390/kvm/guestdbg.c
@@ -0,0 +1,482 @@
+/*
+ * kvm guest debug support
+ *
+ * Copyright IBM Corp. 2014
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ *
+ * Author(s): David Hildenbrand <dahi@linux.vnet.ibm.com>
+ */
+#include <linux/kvm_host.h>
+#include <linux/errno.h>
+#include "kvm-s390.h"
+#include "gaccess.h"
+
+/*
+ * Extends the address range given by *start and *stop to include the address
+ * range starting with estart and the length len. Takes care of overflowing
+ * intervals and tries to minimize the overall intervall size.
+ */
+static void extend_address_range(u64 *start, u64 *stop, u64 estart, int len)
+{
+ u64 estop;
+
+ if (len > 0)
+ len--;
+ else
+ len = 0;
+
+ estop = estart + len;
+
+ /* 0-0 range represents "not set" */
+ if ((*start == 0) && (*stop == 0)) {
+ *start = estart;
+ *stop = estop;
+ } else if (*start <= *stop) {
+ /* increase the existing range */
+ if (estart < *start)
+ *start = estart;
+ if (estop > *stop)
+ *stop = estop;
+ } else {
+ /* "overflowing" interval, whereby *stop > *start */
+ if (estart <= *stop) {
+ if (estop > *stop)
+ *stop = estop;
+ } else if (estop > *start) {
+ if (estart < *start)
+ *start = estart;
+ }
+ /* minimize the range */
+ else if ((estop - *stop) < (*start - estart))
+ *stop = estop;
+ else
+ *start = estart;
+ }
+}
+
+#define MAX_INST_SIZE 6
+
+static void enable_all_hw_bp(struct kvm_vcpu *vcpu)
+{
+ unsigned long start, len;
+ u64 *cr9 = &vcpu->arch.sie_block->gcr[9];
+ u64 *cr10 = &vcpu->arch.sie_block->gcr[10];
+ u64 *cr11 = &vcpu->arch.sie_block->gcr[11];
+ int i;
+
+ if (vcpu->arch.guestdbg.nr_hw_bp <= 0 ||
+ vcpu->arch.guestdbg.hw_bp_info == NULL)
+ return;
+
+ /*
+ * If the guest is not interrested in branching events, we can savely
+ * limit them to the PER address range.
+ */
+ if (!(*cr9 & PER_EVENT_BRANCH))
+ *cr9 |= PER_CONTROL_BRANCH_ADDRESS;
+ *cr9 |= PER_EVENT_IFETCH | PER_EVENT_BRANCH;
+
+ for (i = 0; i < vcpu->arch.guestdbg.nr_hw_bp; i++) {
+ start = vcpu->arch.guestdbg.hw_bp_info[i].addr;
+ len = vcpu->arch.guestdbg.hw_bp_info[i].len;
+
+ /*
+ * The instruction in front of the desired bp has to
+ * report instruction-fetching events
+ */
+ if (start < MAX_INST_SIZE) {
+ len += start;
+ start = 0;
+ } else {
+ start -= MAX_INST_SIZE;
+ len += MAX_INST_SIZE;
+ }
+
+ extend_address_range(cr10, cr11, start, len);
+ }
+}
+
+static void enable_all_hw_wp(struct kvm_vcpu *vcpu)
+{
+ unsigned long start, len;
+ u64 *cr9 = &vcpu->arch.sie_block->gcr[9];
+ u64 *cr10 = &vcpu->arch.sie_block->gcr[10];
+ u64 *cr11 = &vcpu->arch.sie_block->gcr[11];
+ int i;
+
+ if (vcpu->arch.guestdbg.nr_hw_wp <= 0 ||
+ vcpu->arch.guestdbg.hw_wp_info == NULL)
+ return;
+
+ /* if host uses storage alternation for special address
+ * spaces, enable all events and give all to the guest */
+ if (*cr9 & PER_EVENT_STORE && *cr9 & PER_CONTROL_ALTERATION) {
+ *cr9 &= ~PER_CONTROL_ALTERATION;
+ *cr10 = 0;
+ *cr11 = PSW_ADDR_INSN;
+ } else {
+ *cr9 &= ~PER_CONTROL_ALTERATION;
+ *cr9 |= PER_EVENT_STORE;
+
+ for (i = 0; i < vcpu->arch.guestdbg.nr_hw_wp; i++) {
+ start = vcpu->arch.guestdbg.hw_wp_info[i].addr;
+ len = vcpu->arch.guestdbg.hw_wp_info[i].len;
+
+ extend_address_range(cr10, cr11, start, len);
+ }
+ }
+}
+
+void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.guestdbg.cr0 = vcpu->arch.sie_block->gcr[0];
+ vcpu->arch.guestdbg.cr9 = vcpu->arch.sie_block->gcr[9];
+ vcpu->arch.guestdbg.cr10 = vcpu->arch.sie_block->gcr[10];
+ vcpu->arch.guestdbg.cr11 = vcpu->arch.sie_block->gcr[11];
+}
+
+void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.sie_block->gcr[0] = vcpu->arch.guestdbg.cr0;
+ vcpu->arch.sie_block->gcr[9] = vcpu->arch.guestdbg.cr9;
+ vcpu->arch.sie_block->gcr[10] = vcpu->arch.guestdbg.cr10;
+ vcpu->arch.sie_block->gcr[11] = vcpu->arch.guestdbg.cr11;
+}
+
+void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu)
+{
+ /*
+ * TODO: if guest psw has per enabled, otherwise 0s!
+ * This reduces the amount of reported events.
+ * Need to intercept all psw changes!
+ */
+
+ if (guestdbg_sstep_enabled(vcpu)) {
+ /* disable timer (clock-comparator) interrupts */
+ vcpu->arch.sie_block->gcr[0] &= ~0x800ul;
+ vcpu->arch.sie_block->gcr[9] |= PER_EVENT_IFETCH;
+ vcpu->arch.sie_block->gcr[10] = 0;
+ vcpu->arch.sie_block->gcr[11] = PSW_ADDR_INSN;
+ }
+
+ if (guestdbg_hw_bp_enabled(vcpu)) {
+ enable_all_hw_bp(vcpu);
+ enable_all_hw_wp(vcpu);
+ }
+
+ /* TODO: Instruction-fetching-nullification not allowed for now */
+ if (vcpu->arch.sie_block->gcr[9] & PER_EVENT_NULLIFICATION)
+ vcpu->arch.sie_block->gcr[9] &= ~PER_EVENT_NULLIFICATION;
+}
+
+#define MAX_WP_SIZE 100
+
+static int __import_wp_info(struct kvm_vcpu *vcpu,
+ struct kvm_hw_breakpoint *bp_data,
+ struct kvm_hw_wp_info_arch *wp_info)
+{
+ int ret = 0;
+ wp_info->len = bp_data->len;
+ wp_info->addr = bp_data->addr;
+ wp_info->phys_addr = bp_data->phys_addr;
+ wp_info->old_data = NULL;
+
+ if (wp_info->len < 0 || wp_info->len > MAX_WP_SIZE)
+ return -EINVAL;
+
+ wp_info->old_data = kmalloc(bp_data->len, GFP_KERNEL);
+ if (!wp_info->old_data)
+ return -ENOMEM;
+ /* try to backup the original value */
+ ret = read_guest(vcpu, wp_info->phys_addr, wp_info->old_data,
+ wp_info->len);
+ if (ret) {
+ kfree(wp_info->old_data);
+ wp_info->old_data = NULL;
+ }
+
+ return ret;
+}
+
+#define MAX_BP_COUNT 50
+
+int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
+ struct kvm_guest_debug *dbg)
+{
+ int ret = 0, nr_wp = 0, nr_bp = 0, i, size;
+ struct kvm_hw_breakpoint *bp_data = NULL;
+ struct kvm_hw_wp_info_arch *wp_info = NULL;
+ struct kvm_hw_bp_info_arch *bp_info = NULL;
+
+ if (dbg->arch.nr_hw_bp <= 0 || !dbg->arch.hw_bp)
+ return 0;
+ else if (dbg->arch.nr_hw_bp > MAX_BP_COUNT)
+ return -EINVAL;
+
+ size = dbg->arch.nr_hw_bp * sizeof(struct kvm_hw_breakpoint);
+ bp_data = kmalloc(size, GFP_KERNEL);
+ if (!bp_data) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ if (copy_from_user(bp_data, dbg->arch.hw_bp, size)) {
+ ret = -EFAULT;
+ goto error;
+ }
+
+ for (i = 0; i < dbg->arch.nr_hw_bp; i++) {
+ switch (bp_data[i].type) {
+ case KVM_HW_WP_WRITE:
+ nr_wp++;
+ break;
+ case KVM_HW_BP:
+ nr_bp++;
+ break;
+ default:
+ break;
+ }
+ }
+
+ size = nr_wp * sizeof(struct kvm_hw_wp_info_arch);
+ if (size > 0) {
+ wp_info = kmalloc(size, GFP_KERNEL);
+ if (!wp_info) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+ size = nr_bp * sizeof(struct kvm_hw_bp_info_arch);
+ if (size > 0) {
+ bp_info = kmalloc(size, GFP_KERNEL);
+ if (!bp_info) {
+ ret = -ENOMEM;
+ goto error;
+ }
+ }
+
+ for (nr_wp = 0, nr_bp = 0, i = 0; i < dbg->arch.nr_hw_bp; i++) {
+ switch (bp_data[i].type) {
+ case KVM_HW_WP_WRITE:
+ ret = __import_wp_info(vcpu, &bp_data[i],
+ &wp_info[nr_wp]);
+ if (ret)
+ goto error;
+ nr_wp++;
+ break;
+ case KVM_HW_BP:
+ bp_info[nr_bp].len = bp_data[i].len;
+ bp_info[nr_bp].addr = bp_data[i].addr;
+ nr_bp++;
+ break;
+ }
+ }
+
+ vcpu->arch.guestdbg.nr_hw_bp = nr_bp;
+ vcpu->arch.guestdbg.hw_bp_info = bp_info;
+ vcpu->arch.guestdbg.nr_hw_wp = nr_wp;
+ vcpu->arch.guestdbg.hw_wp_info = wp_info;
+ return 0;
+error:
+ kfree(bp_data);
+ kfree(wp_info);
+ kfree(bp_info);
+ return ret;
+}
+
+void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu)
+{
+ int i;
+ struct kvm_hw_wp_info_arch *hw_wp_info = NULL;
+
+ for (i = 0; i < vcpu->arch.guestdbg.nr_hw_wp; i++) {
+ hw_wp_info = &vcpu->arch.guestdbg.hw_wp_info[i];
+ kfree(hw_wp_info->old_data);
+ hw_wp_info->old_data = NULL;
+ }
+ kfree(vcpu->arch.guestdbg.hw_wp_info);
+ vcpu->arch.guestdbg.hw_wp_info = NULL;
+
+ kfree(vcpu->arch.guestdbg.hw_bp_info);
+ vcpu->arch.guestdbg.hw_bp_info = NULL;
+
+ vcpu->arch.guestdbg.nr_hw_wp = 0;
+ vcpu->arch.guestdbg.nr_hw_bp = 0;
+}
+
+static inline int in_addr_range(u64 addr, u64 a, u64 b)
+{
+ if (a <= b)
+ return (addr >= a) && (addr <= b);
+ else
+ /* "overflowing" interval */
+ return (addr <= a) && (addr >= b);
+}
+
+#define end_of_range(bp_info) (bp_info->addr + bp_info->len - 1)
+
+static struct kvm_hw_bp_info_arch *find_hw_bp(struct kvm_vcpu *vcpu,
+ unsigned long addr)
+{
+ struct kvm_hw_bp_info_arch *bp_info = vcpu->arch.guestdbg.hw_bp_info;
+ int i;
+
+ if (vcpu->arch.guestdbg.nr_hw_bp == 0)
+ return NULL;
+
+ for (i = 0; i < vcpu->arch.guestdbg.nr_hw_bp; i++) {
+ /* addr is directly the start or in the range of a bp */
+ if (addr == bp_info->addr)
+ goto found;
+ if (bp_info->len > 0 &&
+ in_addr_range(addr, bp_info->addr, end_of_range(bp_info)))
+ goto found;
+
+ bp_info++;
+ }
+
+ return NULL;
+found:
+ return bp_info;
+}
+
+static struct kvm_hw_wp_info_arch *any_wp_changed(struct kvm_vcpu *vcpu)
+{
+ int i;
+ struct kvm_hw_wp_info_arch *wp_info = NULL;
+ void *temp = NULL;
+
+ if (vcpu->arch.guestdbg.nr_hw_wp == 0)
+ return NULL;
+
+ for (i = 0; i < vcpu->arch.guestdbg.nr_hw_wp; i++) {
+ wp_info = &vcpu->arch.guestdbg.hw_wp_info[i];
+ if (!wp_info || !wp_info->old_data || wp_info->len <= 0)
+ continue;
+
+ temp = kmalloc(wp_info->len, GFP_KERNEL);
+ if (!temp)
+ continue;
+
+ /* refetch the wp data and compare it to the old value */
+ if (!read_guest(vcpu, wp_info->phys_addr, temp,
+ wp_info->len)) {
+ if (memcmp(temp, wp_info->old_data, wp_info->len)) {
+ kfree(temp);
+ return wp_info;
+ }
+ }
+ kfree(temp);
+ temp = NULL;
+ }
+
+ return NULL;
+}
+
+void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu)
+{
+ vcpu->run->exit_reason = KVM_EXIT_DEBUG;
+ vcpu->guest_debug &= ~KVM_GUESTDBG_EXIT_PENDING;
+}
+
+#define per_bp_event(code) \
+ (code & (PER_EVENT_IFETCH | PER_EVENT_BRANCH))
+#define per_write_wp_event(code) \
+ (code & (PER_EVENT_STORE | PER_EVENT_STORE_REAL))
+
+static int debug_exit_required(struct kvm_vcpu *vcpu)
+{
+ u32 perc = (vcpu->arch.sie_block->perc << 24);
+ struct kvm_debug_exit_arch *debug_exit = &vcpu->run->debug.arch;
+ struct kvm_hw_wp_info_arch *wp_info = NULL;
+ struct kvm_hw_bp_info_arch *bp_info = NULL;
+ unsigned long addr = vcpu->arch.sie_block->gpsw.addr;
+ unsigned long peraddr = vcpu->arch.sie_block->peraddr;
+
+ if (guestdbg_hw_bp_enabled(vcpu)) {
+ if (per_write_wp_event(perc) &&
+ vcpu->arch.guestdbg.nr_hw_wp > 0) {
+ wp_info = any_wp_changed(vcpu);
+ if (wp_info) {
+ debug_exit->addr = wp_info->addr;
+ debug_exit->type = KVM_HW_WP_WRITE;
+ goto exit_required;
+ }
+ }
+ if (per_bp_event(perc) &&
+ vcpu->arch.guestdbg.nr_hw_bp > 0) {
+ bp_info = find_hw_bp(vcpu, addr);
+ /* remove duplicate events if PC==PER address */
+ if (bp_info && (addr != peraddr)) {
+ debug_exit->addr = addr;
+ debug_exit->type = KVM_HW_BP;
+ vcpu->arch.guestdbg.last_bp = addr;
+ goto exit_required;
+ }
+ /* breakpoint missed */
+ bp_info = find_hw_bp(vcpu, peraddr);
+ if (bp_info && vcpu->arch.guestdbg.last_bp != peraddr) {
+ debug_exit->addr = peraddr;
+ debug_exit->type = KVM_HW_BP;
+ goto exit_required;
+ }
+ }
+ }
+ if (guestdbg_sstep_enabled(vcpu) && per_bp_event(perc)) {
+ debug_exit->addr = addr;
+ debug_exit->type = KVM_SINGLESTEP;
+ goto exit_required;
+ }
+
+ return 0;
+exit_required:
+ return 1;
+}
+
+#define guest_per_enabled(vcpu) \
+ (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PER)
+
+static void filter_guest_per_event(struct kvm_vcpu *vcpu)
+{
+ u32 perc = vcpu->arch.sie_block->perc << 24;
+ u64 peraddr = vcpu->arch.sie_block->peraddr;
+ u64 addr = vcpu->arch.sie_block->gpsw.addr;
+ u64 cr9 = vcpu->arch.sie_block->gcr[9];
+ u64 cr10 = vcpu->arch.sie_block->gcr[10];
+ u64 cr11 = vcpu->arch.sie_block->gcr[11];
+ /* filter all events, demanded by the guest */
+ u32 guest_perc = perc & cr9 & PER_EVENT_MASK;
+
+ if (!guest_per_enabled(vcpu))
+ guest_perc = 0;
+
+ /* filter "successful-branching" events */
+ if (guest_perc & PER_EVENT_BRANCH &&
+ cr9 & PER_CONTROL_BRANCH_ADDRESS &&
+ !in_addr_range(addr, cr10, cr11))
+ guest_perc &= ~PER_EVENT_BRANCH;
+
+ /* filter "instruction-fetching" events */
+ if (guest_perc & PER_EVENT_IFETCH &&
+ !in_addr_range(peraddr, cr10, cr11))
+ guest_perc &= ~PER_EVENT_IFETCH;
+
+ /* All other PER events will be given to the guest */
+ /* TODO: Check alterated address/address space */
+
+ vcpu->arch.sie_block->perc = guest_perc >> 24;
+
+ if (!guest_perc)
+ vcpu->arch.sie_block->iprcc &= ~PGM_PER;
+}
+
+void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu)
+{
+ if (debug_exit_required(vcpu))
+ vcpu->guest_debug |= KVM_GUESTDBG_EXIT_PENDING;
+
+ filter_guest_per_event(vcpu);
+}
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index eeb1ac7d8fa4..a0b586c1913c 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -1,7 +1,7 @@
/*
* in-kernel handling for sie intercepts
*
- * Copyright IBM Corp. 2008, 2009
+ * Copyright IBM Corp. 2008, 2014
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
@@ -16,6 +16,8 @@
#include <linux/pagemap.h>
#include <asm/kvm_host.h>
+#include <asm/asm-offsets.h>
+#include <asm/irq.h>
#include "kvm-s390.h"
#include "gaccess.h"
@@ -29,6 +31,7 @@ static const intercept_handler_t instruction_handlers[256] = {
[0x83] = kvm_s390_handle_diag,
[0xae] = kvm_s390_handle_sigp,
[0xb2] = kvm_s390_handle_b2,
+ [0xb6] = kvm_s390_handle_stctl,
[0xb7] = kvm_s390_handle_lctl,
[0xb9] = kvm_s390_handle_b9,
[0xe5] = kvm_s390_handle_e5,
@@ -44,9 +47,6 @@ static int handle_noop(struct kvm_vcpu *vcpu)
case 0x10:
vcpu->stat.exit_external_request++;
break;
- case 0x14:
- vcpu->stat.exit_external_interrupt++;
- break;
default:
break; /* nothing */
}
@@ -63,8 +63,7 @@ static int handle_stop(struct kvm_vcpu *vcpu)
trace_kvm_s390_stop_request(vcpu->arch.local_int.action_bits);
if (vcpu->arch.local_int.action_bits & ACTION_STOP_ON_STOP) {
- atomic_set_mask(CPUSTAT_STOPPED,
- &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_vcpu_stop(vcpu);
vcpu->arch.local_int.action_bits &= ~ACTION_STOP_ON_STOP;
VCPU_EVENT(vcpu, 3, "%s", "cpu stopped");
rc = -EOPNOTSUPP;
@@ -109,22 +108,120 @@ static int handle_instruction(struct kvm_vcpu *vcpu)
return -EOPNOTSUPP;
}
+static void __extract_prog_irq(struct kvm_vcpu *vcpu,
+ struct kvm_s390_pgm_info *pgm_info)
+{
+ memset(pgm_info, 0, sizeof(struct kvm_s390_pgm_info));
+ pgm_info->code = vcpu->arch.sie_block->iprcc;
+
+ switch (vcpu->arch.sie_block->iprcc & ~PGM_PER) {
+ case PGM_AFX_TRANSLATION:
+ case PGM_ASX_TRANSLATION:
+ case PGM_EX_TRANSLATION:
+ case PGM_LFX_TRANSLATION:
+ case PGM_LSTE_SEQUENCE:
+ case PGM_LSX_TRANSLATION:
+ case PGM_LX_TRANSLATION:
+ case PGM_PRIMARY_AUTHORITY:
+ case PGM_SECONDARY_AUTHORITY:
+ case PGM_SPACE_SWITCH:
+ pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
+ break;
+ case PGM_ALEN_TRANSLATION:
+ case PGM_ALE_SEQUENCE:
+ case PGM_ASTE_INSTANCE:
+ case PGM_ASTE_SEQUENCE:
+ case PGM_ASTE_VALIDITY:
+ case PGM_EXTENDED_AUTHORITY:
+ pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
+ break;
+ case PGM_ASCE_TYPE:
+ case PGM_PAGE_TRANSLATION:
+ case PGM_REGION_FIRST_TRANS:
+ case PGM_REGION_SECOND_TRANS:
+ case PGM_REGION_THIRD_TRANS:
+ case PGM_SEGMENT_TRANSLATION:
+ pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
+ pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
+ pgm_info->op_access_id = vcpu->arch.sie_block->oai;
+ break;
+ case PGM_MONITOR:
+ pgm_info->mon_class_nr = vcpu->arch.sie_block->mcn;
+ pgm_info->mon_code = vcpu->arch.sie_block->tecmc;
+ break;
+ case PGM_DATA:
+ pgm_info->data_exc_code = vcpu->arch.sie_block->dxc;
+ break;
+ case PGM_PROTECTION:
+ pgm_info->trans_exc_code = vcpu->arch.sie_block->tecmc;
+ pgm_info->exc_access_id = vcpu->arch.sie_block->eai;
+ break;
+ default:
+ break;
+ }
+
+ if (vcpu->arch.sie_block->iprcc & PGM_PER) {
+ pgm_info->per_code = vcpu->arch.sie_block->perc;
+ pgm_info->per_atmid = vcpu->arch.sie_block->peratmid;
+ pgm_info->per_address = vcpu->arch.sie_block->peraddr;
+ pgm_info->per_access_id = vcpu->arch.sie_block->peraid;
+ }
+}
+
+/*
+ * restore ITDB to program-interruption TDB in guest lowcore
+ * and set TX abort indication if required
+*/
+static int handle_itdb(struct kvm_vcpu *vcpu)
+{
+ struct kvm_s390_itdb *itdb;
+ int rc;
+
+ if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
+ return 0;
+ if (current->thread.per_flags & PER_FLAG_NO_TE)
+ return 0;
+ itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
+ rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
+ if (rc)
+ return rc;
+ memset(itdb, 0, sizeof(*itdb));
+
+ return 0;
+}
+
+#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
+
static int handle_prog(struct kvm_vcpu *vcpu)
{
+ struct kvm_s390_pgm_info pgm_info;
+ psw_t psw;
+ int rc;
+
vcpu->stat.exit_program_interruption++;
- /* Restore ITDB to Program-Interruption TDB in guest memory */
- if (IS_TE_ENABLED(vcpu) &&
- !(current->thread.per_flags & PER_FLAG_NO_TE) &&
- IS_ITDB_VALID(vcpu)) {
- copy_to_guest(vcpu, TDB_ADDR, vcpu->arch.sie_block->itdba,
- sizeof(struct kvm_s390_itdb));
- memset((void *) vcpu->arch.sie_block->itdba, 0,
- sizeof(struct kvm_s390_itdb));
+ if (guestdbg_enabled(vcpu) && per_event(vcpu)) {
+ kvm_s390_handle_per_event(vcpu);
+ /* the interrupt might have been filtered out completely */
+ if (vcpu->arch.sie_block->iprcc == 0)
+ return 0;
}
trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
- return kvm_s390_inject_program_int(vcpu, vcpu->arch.sie_block->iprcc);
+ if (vcpu->arch.sie_block->iprcc == PGM_SPECIFICATION) {
+ rc = read_guest_lc(vcpu, __LC_PGM_NEW_PSW, &psw, sizeof(psw_t));
+ if (rc)
+ return rc;
+ /* Avoid endless loops of specification exceptions */
+ if (!is_valid_psw(&psw))
+ return -EOPNOTSUPP;
+ }
+ rc = handle_itdb(vcpu);
+ if (rc)
+ return rc;
+
+ __extract_prog_irq(vcpu, &pgm_info);
+ return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
}
static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
@@ -142,17 +239,110 @@ static int handle_instruction_and_prog(struct kvm_vcpu *vcpu)
return rc2;
}
+/**
+ * handle_external_interrupt - used for external interruption interceptions
+ *
+ * This interception only occurs if the CPUSTAT_EXT_INT bit was set, or if
+ * the new PSW does not have external interrupts disabled. In the first case,
+ * we've got to deliver the interrupt manually, and in the second case, we
+ * drop to userspace to handle the situation there.
+ */
+static int handle_external_interrupt(struct kvm_vcpu *vcpu)
+{
+ u16 eic = vcpu->arch.sie_block->eic;
+ struct kvm_s390_interrupt irq;
+ psw_t newpsw;
+ int rc;
+
+ vcpu->stat.exit_external_interrupt++;
+
+ rc = read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &newpsw, sizeof(psw_t));
+ if (rc)
+ return rc;
+ /* We can not handle clock comparator or timer interrupt with bad PSW */
+ if ((eic == EXT_IRQ_CLK_COMP || eic == EXT_IRQ_CPU_TIMER) &&
+ (newpsw.mask & PSW_MASK_EXT))
+ return -EOPNOTSUPP;
+
+ switch (eic) {
+ case EXT_IRQ_CLK_COMP:
+ irq.type = KVM_S390_INT_CLOCK_COMP;
+ break;
+ case EXT_IRQ_CPU_TIMER:
+ irq.type = KVM_S390_INT_CPU_TIMER;
+ break;
+ case EXT_IRQ_EXTERNAL_CALL:
+ if (kvm_s390_si_ext_call_pending(vcpu))
+ return 0;
+ irq.type = KVM_S390_INT_EXTERNAL_CALL;
+ irq.parm = vcpu->arch.sie_block->extcpuaddr;
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return kvm_s390_inject_vcpu(vcpu, &irq);
+}
+
+/**
+ * Handle MOVE PAGE partial execution interception.
+ *
+ * This interception can only happen for guests with DAT disabled and
+ * addresses that are currently not mapped in the host. Thus we try to
+ * set up the mappings for the corresponding user pages here (or throw
+ * addressing exceptions in case of illegal guest addresses).
+ */
+static int handle_mvpg_pei(struct kvm_vcpu *vcpu)
+{
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+ unsigned long srcaddr, dstaddr;
+ int reg1, reg2, rc;
+
+ kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
+
+ /* Make sure that the source is paged-in */
+ srcaddr = kvm_s390_real_to_abs(vcpu, vcpu->run->s.regs.gprs[reg2]);
+ if (kvm_is_error_gpa(vcpu->kvm, srcaddr))
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = kvm_arch_fault_in_page(vcpu, srcaddr, 0);
+ if (rc != 0)
+ return rc;
+
+ /* Make sure that the destination is paged-in */
+ dstaddr = kvm_s390_real_to_abs(vcpu, vcpu->run->s.regs.gprs[reg1]);
+ if (kvm_is_error_gpa(vcpu->kvm, dstaddr))
+ return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = kvm_arch_fault_in_page(vcpu, dstaddr, 1);
+ if (rc != 0)
+ return rc;
+
+ psw->addr = __rewind_psw(*psw, 4);
+
+ return 0;
+}
+
+static int handle_partial_execution(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.sie_block->ipa == 0xb254) /* MVPG */
+ return handle_mvpg_pei(vcpu);
+ if (vcpu->arch.sie_block->ipa >> 8 == 0xae) /* SIGP */
+ return kvm_s390_handle_sigp_pei(vcpu);
+
+ return -EOPNOTSUPP;
+}
+
static const intercept_handler_t intercept_funcs[] = {
[0x00 >> 2] = handle_noop,
[0x04 >> 2] = handle_instruction,
[0x08 >> 2] = handle_prog,
[0x0C >> 2] = handle_instruction_and_prog,
[0x10 >> 2] = handle_noop,
- [0x14 >> 2] = handle_noop,
+ [0x14 >> 2] = handle_external_interrupt,
[0x18 >> 2] = handle_noop,
[0x1C >> 2] = kvm_s390_handle_wait,
[0x20 >> 2] = handle_validity,
[0x28 >> 2] = handle_stop,
+ [0x38 >> 2] = handle_partial_execution,
};
int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 200a8f9390b6..90c8de22a2a0 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -27,6 +27,8 @@
#define IOINT_CSSID_MASK 0x03fc0000
#define IOINT_AI_MASK 0x04000000
+static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu);
+
static int is_ioint(u64 type)
{
return ((type & 0xfffe0000u) != 0xfffe0000u);
@@ -56,6 +58,17 @@ static int psw_interrupts_disabled(struct kvm_vcpu *vcpu)
return 1;
}
+static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu)
+{
+ if (psw_extint_disabled(vcpu) ||
+ !(vcpu->arch.sie_block->gcr[0] & 0x800ul))
+ return 0;
+ if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu))
+ /* No timer interrupts when single stepping */
+ return 0;
+ return 1;
+}
+
static u64 int_word_to_isc_bits(u32 int_word)
{
u8 isc = (int_word & 0x38000000) >> 27;
@@ -78,6 +91,14 @@ static int __interrupt_is_deliverable(struct kvm_vcpu *vcpu,
if (vcpu->arch.sie_block->gcr[0] & 0x4000ul)
return 1;
return 0;
+ case KVM_S390_INT_CLOCK_COMP:
+ return ckc_interrupts_enabled(vcpu);
+ case KVM_S390_INT_CPU_TIMER:
+ if (psw_extint_disabled(vcpu))
+ return 0;
+ if (vcpu->arch.sie_block->gcr[0] & 0x400ul)
+ return 1;
+ return 0;
case KVM_S390_INT_SERVICE:
case KVM_S390_INT_PFAULT_INIT:
case KVM_S390_INT_PFAULT_DONE:
@@ -127,11 +148,16 @@ static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
{
- atomic_clear_mask(CPUSTAT_ECALL_PEND |
- CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
- &vcpu->arch.sie_block->cpuflags);
+ atomic_clear_mask(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
+ &vcpu->arch.sie_block->cpuflags);
vcpu->arch.sie_block->lctl = 0x0000;
- vcpu->arch.sie_block->ictl &= ~ICTL_LPSW;
+ vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);
+
+ if (guestdbg_enabled(vcpu)) {
+ vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 |
+ LCTL_CR10 | LCTL_CR11);
+ vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT);
+ }
}
static void __set_cpuflag(struct kvm_vcpu *vcpu, u32 flag)
@@ -149,6 +175,8 @@ static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
case KVM_S390_INT_PFAULT_INIT:
case KVM_S390_INT_PFAULT_DONE:
case KVM_S390_INT_VIRTIO:
+ case KVM_S390_INT_CLOCK_COMP:
+ case KVM_S390_INT_CPU_TIMER:
if (psw_extint_disabled(vcpu))
__set_cpuflag(vcpu, CPUSTAT_EXT_INT);
else
@@ -174,6 +202,106 @@ static void __set_intercept_indicator(struct kvm_vcpu *vcpu,
}
}
+static int __deliver_prog_irq(struct kvm_vcpu *vcpu,
+ struct kvm_s390_pgm_info *pgm_info)
+{
+ const unsigned short table[] = { 2, 4, 4, 6 };
+ int rc = 0;
+
+ switch (pgm_info->code & ~PGM_PER) {
+ case PGM_AFX_TRANSLATION:
+ case PGM_ASX_TRANSLATION:
+ case PGM_EX_TRANSLATION:
+ case PGM_LFX_TRANSLATION:
+ case PGM_LSTE_SEQUENCE:
+ case PGM_LSX_TRANSLATION:
+ case PGM_LX_TRANSLATION:
+ case PGM_PRIMARY_AUTHORITY:
+ case PGM_SECONDARY_AUTHORITY:
+ case PGM_SPACE_SWITCH:
+ rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
+ (u64 *)__LC_TRANS_EXC_CODE);
+ break;
+ case PGM_ALEN_TRANSLATION:
+ case PGM_ALE_SEQUENCE:
+ case PGM_ASTE_INSTANCE:
+ case PGM_ASTE_SEQUENCE:
+ case PGM_ASTE_VALIDITY:
+ case PGM_EXTENDED_AUTHORITY:
+ rc = put_guest_lc(vcpu, pgm_info->exc_access_id,
+ (u8 *)__LC_EXC_ACCESS_ID);
+ break;
+ case PGM_ASCE_TYPE:
+ case PGM_PAGE_TRANSLATION:
+ case PGM_REGION_FIRST_TRANS:
+ case PGM_REGION_SECOND_TRANS:
+ case PGM_REGION_THIRD_TRANS:
+ case PGM_SEGMENT_TRANSLATION:
+ rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
+ (u64 *)__LC_TRANS_EXC_CODE);
+ rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
+ (u8 *)__LC_EXC_ACCESS_ID);
+ rc |= put_guest_lc(vcpu, pgm_info->op_access_id,
+ (u8 *)__LC_OP_ACCESS_ID);
+ break;
+ case PGM_MONITOR:
+ rc = put_guest_lc(vcpu, pgm_info->mon_class_nr,
+ (u64 *)__LC_MON_CLASS_NR);
+ rc |= put_guest_lc(vcpu, pgm_info->mon_code,
+ (u64 *)__LC_MON_CODE);
+ break;
+ case PGM_DATA:
+ rc = put_guest_lc(vcpu, pgm_info->data_exc_code,
+ (u32 *)__LC_DATA_EXC_CODE);
+ break;
+ case PGM_PROTECTION:
+ rc = put_guest_lc(vcpu, pgm_info->trans_exc_code,
+ (u64 *)__LC_TRANS_EXC_CODE);
+ rc |= put_guest_lc(vcpu, pgm_info->exc_access_id,
+ (u8 *)__LC_EXC_ACCESS_ID);
+ break;
+ }
+
+ if (pgm_info->code & PGM_PER) {
+ rc |= put_guest_lc(vcpu, pgm_info->per_code,
+ (u8 *) __LC_PER_CODE);
+ rc |= put_guest_lc(vcpu, pgm_info->per_atmid,
+ (u8 *)__LC_PER_ATMID);
+ rc |= put_guest_lc(vcpu, pgm_info->per_address,
+ (u64 *) __LC_PER_ADDRESS);
+ rc |= put_guest_lc(vcpu, pgm_info->per_access_id,
+ (u8 *) __LC_PER_ACCESS_ID);
+ }
+
+ switch (vcpu->arch.sie_block->icptcode) {
+ case ICPT_INST:
+ case ICPT_INSTPROGI:
+ case ICPT_OPEREXC:
+ case ICPT_PARTEXEC:
+ case ICPT_IOINST:
+ /* last instruction only stored for these icptcodes */
+ rc |= put_guest_lc(vcpu, table[vcpu->arch.sie_block->ipa >> 14],
+ (u16 *) __LC_PGM_ILC);
+ break;
+ case ICPT_PROGI:
+ rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->pgmilc,
+ (u16 *) __LC_PGM_ILC);
+ break;
+ default:
+ rc |= put_guest_lc(vcpu, 0,
+ (u16 *) __LC_PGM_ILC);
+ }
+
+ rc |= put_guest_lc(vcpu, pgm_info->code,
+ (u16 *)__LC_PGM_INT_CODE);
+ rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+
+ return rc;
+}
+
static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
struct kvm_s390_interrupt_info *inti)
{
@@ -186,26 +314,46 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
vcpu->stat.deliver_emergency_signal++;
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->emerg.code, 0);
- rc = put_guest(vcpu, 0x1201, (u16 __user *)__LC_EXT_INT_CODE);
- rc |= put_guest(vcpu, inti->emerg.code,
- (u16 __user *)__LC_EXT_CPU_ADDR);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
+ rc = put_guest_lc(vcpu, 0x1201, (u16 *)__LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, inti->emerg.code,
+ (u16 *)__LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
break;
case KVM_S390_INT_EXTERNAL_CALL:
VCPU_EVENT(vcpu, 4, "%s", "interrupt: sigp ext call");
vcpu->stat.deliver_external_call++;
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->extcall.code, 0);
- rc = put_guest(vcpu, 0x1202, (u16 __user *)__LC_EXT_INT_CODE);
- rc |= put_guest(vcpu, inti->extcall.code,
- (u16 __user *)__LC_EXT_CPU_ADDR);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
+ rc = put_guest_lc(vcpu, 0x1202, (u16 *)__LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, inti->extcall.code,
+ (u16 *)__LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ break;
+ case KVM_S390_INT_CLOCK_COMP:
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
+ inti->ext.ext_params, 0);
+ deliver_ckc_interrupt(vcpu);
+ break;
+ case KVM_S390_INT_CPU_TIMER:
+ trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
+ inti->ext.ext_params, 0);
+ rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER,
+ (u16 *)__LC_EXT_INT_CODE);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params,
+ (u32 *)__LC_EXT_PARAMS);
break;
case KVM_S390_INT_SERVICE:
VCPU_EVENT(vcpu, 4, "interrupt: sclp parm:%x",
@@ -213,37 +361,39 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
vcpu->stat.deliver_service_signal++;
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->ext.ext_params, 0);
- rc = put_guest(vcpu, 0x2401, (u16 __user *)__LC_EXT_INT_CODE);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
+ rc = put_guest_lc(vcpu, 0x2401, (u16 *)__LC_EXT_INT_CODE);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
- rc |= put_guest(vcpu, inti->ext.ext_params,
- (u32 __user *)__LC_EXT_PARAMS);
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params,
+ (u32 *)__LC_EXT_PARAMS);
break;
case KVM_S390_INT_PFAULT_INIT:
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
inti->ext.ext_params2);
- rc = put_guest(vcpu, 0x2603, (u16 __user *) __LC_EXT_INT_CODE);
- rc |= put_guest(vcpu, 0x0600, (u16 __user *) __LC_EXT_CPU_ADDR);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
+ rc = put_guest_lc(vcpu, 0x2603, (u16 *) __LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, 0x0600, (u16 *) __LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
- rc |= put_guest(vcpu, inti->ext.ext_params2,
- (u64 __user *) __LC_EXT_PARAMS2);
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
+ (u64 *) __LC_EXT_PARAMS2);
break;
case KVM_S390_INT_PFAULT_DONE:
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type, 0,
inti->ext.ext_params2);
- rc = put_guest(vcpu, 0x2603, (u16 __user *) __LC_EXT_INT_CODE);
- rc |= put_guest(vcpu, 0x0680, (u16 __user *) __LC_EXT_CPU_ADDR);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
+ rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, 0x0680, (u16 *)__LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
- rc |= put_guest(vcpu, inti->ext.ext_params2,
- (u64 __user *) __LC_EXT_PARAMS2);
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
+ (u64 *)__LC_EXT_PARAMS2);
break;
case KVM_S390_INT_VIRTIO:
VCPU_EVENT(vcpu, 4, "interrupt: virtio parm:%x,parm64:%llx",
@@ -252,16 +402,17 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->ext.ext_params,
inti->ext.ext_params2);
- rc = put_guest(vcpu, 0x2603, (u16 __user *)__LC_EXT_INT_CODE);
- rc |= put_guest(vcpu, 0x0d00, (u16 __user *)__LC_EXT_CPU_ADDR);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
+ rc = put_guest_lc(vcpu, 0x2603, (u16 *)__LC_EXT_INT_CODE);
+ rc |= put_guest_lc(vcpu, 0x0d00, (u16 *)__LC_EXT_CPU_ADDR);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
- rc |= put_guest(vcpu, inti->ext.ext_params,
- (u32 __user *)__LC_EXT_PARAMS);
- rc |= put_guest(vcpu, inti->ext.ext_params2,
- (u64 __user *)__LC_EXT_PARAMS2);
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params,
+ (u32 *)__LC_EXT_PARAMS);
+ rc |= put_guest_lc(vcpu, inti->ext.ext_params2,
+ (u64 *)__LC_EXT_PARAMS2);
break;
case KVM_S390_SIGP_STOP:
VCPU_EVENT(vcpu, 4, "%s", "interrupt: cpu stop");
@@ -285,13 +436,12 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
vcpu->stat.deliver_restart_signal++;
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
0, 0);
- rc = copy_to_guest(vcpu,
- offsetof(struct _lowcore, restart_old_psw),
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- offsetof(struct _lowcore, restart_psw),
- sizeof(psw_t));
- atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ rc = write_guest_lc(vcpu,
+ offsetof(struct _lowcore, restart_old_psw),
+ &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, offsetof(struct _lowcore, restart_psw),
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
break;
case KVM_S390_PROGRAM_INT:
VCPU_EVENT(vcpu, 4, "interrupt: pgm check code:%x, ilc:%x",
@@ -300,13 +450,7 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
vcpu->stat.deliver_program_int++;
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
inti->pgm.code, 0);
- rc = put_guest(vcpu, inti->pgm.code, (u16 __user *)__LC_PGM_INT_CODE);
- rc |= put_guest(vcpu, table[vcpu->arch.sie_block->ipa >> 14],
- (u16 __user *)__LC_PGM_ILC);
- rc |= copy_to_guest(vcpu, __LC_PGM_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_PGM_NEW_PSW, sizeof(psw_t));
+ rc = __deliver_prog_irq(vcpu, &inti->pgm);
break;
case KVM_S390_MCHK:
@@ -317,11 +461,12 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
inti->mchk.mcic);
rc = kvm_s390_vcpu_store_status(vcpu,
KVM_S390_STORE_STATUS_PREFIXED);
- rc |= put_guest(vcpu, inti->mchk.mcic, (u64 __user *) __LC_MCCK_CODE);
- rc |= copy_to_guest(vcpu, __LC_MCK_OLD_PSW,
+ rc |= put_guest_lc(vcpu, inti->mchk.mcic, (u64 *)__LC_MCCK_CODE);
+ rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW,
&vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_MCK_NEW_PSW, sizeof(psw_t));
break;
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
@@ -334,18 +479,20 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
vcpu->stat.deliver_io_int++;
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, inti->type,
param0, param1);
- rc = put_guest(vcpu, inti->io.subchannel_id,
- (u16 __user *) __LC_SUBCHANNEL_ID);
- rc |= put_guest(vcpu, inti->io.subchannel_nr,
- (u16 __user *) __LC_SUBCHANNEL_NR);
- rc |= put_guest(vcpu, inti->io.io_int_parm,
- (u32 __user *) __LC_IO_INT_PARM);
- rc |= put_guest(vcpu, inti->io.io_int_word,
- (u32 __user *) __LC_IO_INT_WORD);
- rc |= copy_to_guest(vcpu, __LC_IO_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_IO_NEW_PSW, sizeof(psw_t));
+ rc = put_guest_lc(vcpu, inti->io.subchannel_id,
+ (u16 *)__LC_SUBCHANNEL_ID);
+ rc |= put_guest_lc(vcpu, inti->io.subchannel_nr,
+ (u16 *)__LC_SUBCHANNEL_NR);
+ rc |= put_guest_lc(vcpu, inti->io.io_int_parm,
+ (u32 *)__LC_IO_INT_PARM);
+ rc |= put_guest_lc(vcpu, inti->io.io_int_word,
+ (u32 *)__LC_IO_INT_WORD);
+ rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
break;
}
default:
@@ -358,25 +505,35 @@ static void __do_deliver_interrupt(struct kvm_vcpu *vcpu,
}
}
-static int __try_deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
+static void deliver_ckc_interrupt(struct kvm_vcpu *vcpu)
{
int rc;
- if (psw_extint_disabled(vcpu))
- return 0;
- if (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))
- return 0;
- rc = put_guest(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
- rc |= copy_to_guest(vcpu, __LC_EXT_OLD_PSW,
- &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
- rc |= copy_from_guest(vcpu, &vcpu->arch.sie_block->gpsw,
- __LC_EXT_NEW_PSW, sizeof(psw_t));
+ rc = put_guest_lc(vcpu, 0x1004, (u16 __user *)__LC_EXT_INT_CODE);
+ rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW,
+ &vcpu->arch.sie_block->gpsw, sizeof(psw_t));
+ rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW,
+ &vcpu->arch.sie_block->gpsw,
+ sizeof(psw_t));
if (rc) {
printk("kvm: The guest lowcore is not mapped during interrupt "
"delivery, killing userspace\n");
do_exit(SIGKILL);
}
- return 1;
+}
+
+/* Check whether SIGP interpretation facility has an external call pending */
+int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu)
+{
+ atomic_t *sigp_ctrl = &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl;
+
+ if (!psw_extint_disabled(vcpu) &&
+ (vcpu->arch.sie_block->gcr[0] & 0x2000ul) &&
+ (atomic_read(sigp_ctrl) & SIGP_CTRL_C) &&
+ (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_ECALL_PEND))
+ return 1;
+
+ return 0;
}
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
@@ -406,19 +563,23 @@ int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
spin_unlock(&fi->lock);
}
- if ((!rc) && (vcpu->arch.sie_block->ckc <
- get_tod_clock_fast() + vcpu->arch.sie_block->epoch)) {
- if ((!psw_extint_disabled(vcpu)) &&
- (vcpu->arch.sie_block->gcr[0] & 0x800ul))
- rc = 1;
- }
+ if (!rc && kvm_cpu_has_pending_timer(vcpu))
+ rc = 1;
+
+ if (!rc && kvm_s390_si_ext_call_pending(vcpu))
+ rc = 1;
return rc;
}
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
- return 0;
+ if (!(vcpu->arch.sie_block->ckc <
+ get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
+ return 0;
+ if (!ckc_interrupts_enabled(vcpu))
+ return 0;
+ return 1;
}
int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
@@ -441,8 +602,7 @@ int kvm_s390_handle_wait(struct kvm_vcpu *vcpu)
return -EOPNOTSUPP; /* disabled wait */
}
- if (psw_extint_disabled(vcpu) ||
- (!(vcpu->arch.sie_block->gcr[0] & 0x800ul))) {
+ if (!ckc_interrupts_enabled(vcpu)) {
VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer");
goto no_timer;
}
@@ -465,7 +625,8 @@ no_timer:
while (list_empty(&vcpu->arch.local_int.list) &&
list_empty(&vcpu->arch.local_int.float_int->list) &&
(!vcpu->arch.local_int.timer_due) &&
- !signal_pending(current)) {
+ !signal_pending(current) &&
+ !kvm_s390_si_ext_call_pending(vcpu)) {
set_current_state(TASK_INTERRUPTIBLE);
spin_unlock_bh(&vcpu->arch.local_int.lock);
spin_unlock(&vcpu->arch.local_int.float_int->lock);
@@ -522,6 +683,11 @@ void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu)
}
atomic_set(&li->active, 0);
spin_unlock_bh(&li->lock);
+
+ /* clear pending external calls set by sigp interpretation facility */
+ atomic_clear_mask(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
+ atomic_clear_mask(SIGP_CTRL_C,
+ &vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].ctrl);
}
void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
@@ -554,9 +720,8 @@ void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu)
} while (deliver);
}
- if ((vcpu->arch.sie_block->ckc <
- get_tod_clock_fast() + vcpu->arch.sie_block->epoch))
- __try_deliver_ckc_interrupt(vcpu);
+ if (kvm_cpu_has_pending_timer(vcpu))
+ deliver_ckc_interrupt(vcpu);
if (atomic_read(&fi->active)) {
do {
@@ -660,6 +825,31 @@ int kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code)
return 0;
}
+int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
+ struct kvm_s390_pgm_info *pgm_info)
+{
+ struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
+ struct kvm_s390_interrupt_info *inti;
+
+ inti = kzalloc(sizeof(*inti), GFP_KERNEL);
+ if (!inti)
+ return -ENOMEM;
+
+ VCPU_EVENT(vcpu, 3, "inject: prog irq %d (from kernel)",
+ pgm_info->code);
+ trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT,
+ pgm_info->code, 0, 1);
+
+ inti->type = KVM_S390_PROGRAM_INT;
+ memcpy(&inti->pgm, pgm_info, sizeof(inti->pgm));
+ spin_lock_bh(&li->lock);
+ list_add(&inti->list, &li->list);
+ atomic_set(&li->active, 1);
+ BUG_ON(waitqueue_active(li->wq));
+ spin_unlock_bh(&li->lock);
+ return 0;
+}
+
struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
u64 cr6, u64 schid)
{
@@ -810,6 +1000,12 @@ int kvm_s390_inject_vm(struct kvm *kvm,
return __inject_vm(kvm, inti);
}
+void kvm_s390_reinject_io_int(struct kvm *kvm,
+ struct kvm_s390_interrupt_info *inti)
+{
+ __inject_vm(kvm, inti);
+}
+
int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
struct kvm_s390_interrupt *s390int)
{
@@ -839,6 +1035,8 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
break;
case KVM_S390_SIGP_STOP:
case KVM_S390_RESTART:
+ case KVM_S390_INT_CLOCK_COMP:
+ case KVM_S390_INT_CPU_TIMER:
VCPU_EVENT(vcpu, 3, "inject: type %x", s390int->type);
inti->type = s390int->type;
break;
@@ -900,7 +1098,7 @@ int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
return 0;
}
-static void clear_floating_interrupts(struct kvm *kvm)
+void kvm_s390_clear_float_irqs(struct kvm *kvm)
{
struct kvm_s390_float_interrupt *fi;
struct kvm_s390_interrupt_info *n, *inti = NULL;
@@ -1246,7 +1444,7 @@ static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr)
break;
case KVM_DEV_FLIC_CLEAR_IRQS:
r = 0;
- clear_floating_interrupts(dev->kvm);
+ kvm_s390_clear_float_irqs(dev->kvm);
break;
case KVM_DEV_FLIC_APF_ENABLE:
dev->kvm->arch.gmap->pfault_enabled = 1;
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 825fe7bf95a6..2f3e14fe91a4 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -11,6 +11,7 @@
* Christian Borntraeger <borntraeger@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
* Christian Ehrhardt <ehrhardt@de.ibm.com>
+ * Jason J. Herne <jjherne@us.ibm.com>
*/
#include <linux/compiler.h>
@@ -51,6 +52,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
{ "instruction_lctlg", VCPU_STAT(instruction_lctlg) },
{ "instruction_lctl", VCPU_STAT(instruction_lctl) },
+ { "instruction_stctl", VCPU_STAT(instruction_stctl) },
+ { "instruction_stctg", VCPU_STAT(instruction_stctg) },
{ "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
{ "deliver_external_call", VCPU_STAT(deliver_external_call) },
{ "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
@@ -66,6 +69,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "instruction_stpx", VCPU_STAT(instruction_stpx) },
{ "instruction_stap", VCPU_STAT(instruction_stap) },
{ "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
+ { "instruction_ipte_interlock", VCPU_STAT(instruction_ipte_interlock) },
{ "instruction_stsch", VCPU_STAT(instruction_stsch) },
{ "instruction_chsc", VCPU_STAT(instruction_chsc) },
{ "instruction_essa", VCPU_STAT(instruction_essa) },
@@ -90,7 +94,7 @@ unsigned long *vfacilities;
static struct gmap_notifier gmap_notifier;
/* test availability of vfacility */
-static inline int test_vfacility(unsigned long nr)
+int test_vfacility(unsigned long nr)
{
return __test_facility(nr, (void *) vfacilities);
}
@@ -162,6 +166,7 @@ int kvm_dev_ioctl_check_extension(long ext)
case KVM_CAP_IOEVENTFD:
case KVM_CAP_DEVICE_CTRL:
case KVM_CAP_ENABLE_CAP_VM:
+ case KVM_CAP_VM_ATTRIBUTES:
r = 1;
break;
case KVM_CAP_NR_VCPUS:
@@ -180,6 +185,25 @@ int kvm_dev_ioctl_check_extension(long ext)
return r;
}
+static void kvm_s390_sync_dirty_log(struct kvm *kvm,
+ struct kvm_memory_slot *memslot)
+{
+ gfn_t cur_gfn, last_gfn;
+ unsigned long address;
+ struct gmap *gmap = kvm->arch.gmap;
+
+ down_read(&gmap->mm->mmap_sem);
+ /* Loop over all guest pages */
+ last_gfn = memslot->base_gfn + memslot->npages;
+ for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
+ address = gfn_to_hva_memslot(memslot, cur_gfn);
+
+ if (gmap_test_and_clear_dirty(address, gmap))
+ mark_page_dirty(kvm, cur_gfn);
+ }
+ up_read(&gmap->mm->mmap_sem);
+}
+
/* Section: vm related */
/*
* Get (and clear) the dirty memory log for a memory slot.
@@ -187,7 +211,36 @@ int kvm_dev_ioctl_check_extension(long ext)
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log)
{
- return 0;
+ int r;
+ unsigned long n;
+ struct kvm_memory_slot *memslot;
+ int is_dirty = 0;
+
+ mutex_lock(&kvm->slots_lock);
+
+ r = -EINVAL;
+ if (log->slot >= KVM_USER_MEM_SLOTS)
+ goto out;
+
+ memslot = id_to_memslot(kvm->memslots, log->slot);
+ r = -ENOENT;
+ if (!memslot->dirty_bitmap)
+ goto out;
+
+ kvm_s390_sync_dirty_log(kvm, memslot);
+ r = kvm_get_dirty_log(kvm, log, &is_dirty);
+ if (r)
+ goto out;
+
+ /* Clear the dirty log */
+ if (is_dirty) {
+ n = kvm_dirty_bitmap_bytes(memslot);
+ memset(memslot->dirty_bitmap, 0, n);
+ }
+ r = 0;
+out:
+ mutex_unlock(&kvm->slots_lock);
+ return r;
}
static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
@@ -209,11 +262,86 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
return r;
}
+static int kvm_s390_mem_control(struct kvm *kvm, struct kvm_device_attr *attr)
+{
+ int ret;
+ unsigned int idx;
+ switch (attr->attr) {
+ case KVM_S390_VM_MEM_ENABLE_CMMA:
+ ret = -EBUSY;
+ mutex_lock(&kvm->lock);
+ if (atomic_read(&kvm->online_vcpus) == 0) {
+ kvm->arch.use_cmma = 1;
+ ret = 0;
+ }
+ mutex_unlock(&kvm->lock);
+ break;
+ case KVM_S390_VM_MEM_CLR_CMMA:
+ mutex_lock(&kvm->lock);
+ idx = srcu_read_lock(&kvm->srcu);
+ page_table_reset_pgste(kvm->arch.gmap->mm, 0, TASK_SIZE, false);
+ srcu_read_unlock(&kvm->srcu, idx);
+ mutex_unlock(&kvm->lock);
+ ret = 0;
+ break;
+ default:
+ ret = -ENXIO;
+ break;
+ }
+ return ret;
+}
+
+static int kvm_s390_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
+{
+ int ret;
+
+ switch (attr->group) {
+ case KVM_S390_VM_MEM_CTRL:
+ ret = kvm_s390_mem_control(kvm, attr);
+ break;
+ default:
+ ret = -ENXIO;
+ break;
+ }
+
+ return ret;
+}
+
+static int kvm_s390_vm_get_attr(struct kvm *kvm, struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+static int kvm_s390_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
+{
+ int ret;
+
+ switch (attr->group) {
+ case KVM_S390_VM_MEM_CTRL:
+ switch (attr->attr) {
+ case KVM_S390_VM_MEM_ENABLE_CMMA:
+ case KVM_S390_VM_MEM_CLR_CMMA:
+ ret = 0;
+ break;
+ default:
+ ret = -ENXIO;
+ break;
+ }
+ break;
+ default:
+ ret = -ENXIO;
+ break;
+ }
+
+ return ret;
+}
+
long kvm_arch_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
struct kvm *kvm = filp->private_data;
void __user *argp = (void __user *)arg;
+ struct kvm_device_attr attr;
int r;
switch (ioctl) {
@@ -246,6 +374,27 @@ long kvm_arch_vm_ioctl(struct file *filp,
}
break;
}
+ case KVM_SET_DEVICE_ATTR: {
+ r = -EFAULT;
+ if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
+ break;
+ r = kvm_s390_vm_set_attr(kvm, &attr);
+ break;
+ }
+ case KVM_GET_DEVICE_ATTR: {
+ r = -EFAULT;
+ if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
+ break;
+ r = kvm_s390_vm_get_attr(kvm, &attr);
+ break;
+ }
+ case KVM_HAS_DEVICE_ATTR: {
+ r = -EFAULT;
+ if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
+ break;
+ r = kvm_s390_vm_has_attr(kvm, &attr);
+ break;
+ }
default:
r = -ENOTTY;
}
@@ -292,6 +441,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
spin_lock_init(&kvm->arch.float_int.lock);
INIT_LIST_HEAD(&kvm->arch.float_int.list);
+ init_waitqueue_head(&kvm->arch.ipte_wq);
debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
VM_EVENT(kvm, 3, "%s", "vm created");
@@ -309,6 +459,8 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
kvm->arch.css_support = 0;
kvm->arch.use_irqchip = 0;
+ spin_lock_init(&kvm->arch.start_stop_lock);
+
return 0;
out_nogmap:
debug_unregister(kvm->arch.dbf);
@@ -322,6 +474,7 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
VCPU_EVENT(vcpu, 3, "%s", "free cpu");
trace_kvm_s390_destroy_vcpu(vcpu->vcpu_id);
+ kvm_s390_clear_local_irqs(vcpu);
kvm_clear_async_pf_completion_queue(vcpu);
if (!kvm_is_ucontrol(vcpu->kvm)) {
clear_bit(63 - vcpu->vcpu_id,
@@ -335,9 +488,8 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
if (kvm_is_ucontrol(vcpu->kvm))
gmap_free(vcpu->arch.gmap);
- if (vcpu->arch.sie_block->cbrlo)
- __free_page(__pfn_to_page(
- vcpu->arch.sie_block->cbrlo >> PAGE_SHIFT));
+ if (kvm_s390_cmma_enabled(vcpu->kvm))
+ kvm_s390_vcpu_unsetup_cmma(vcpu);
free_page((unsigned long)(vcpu->arch.sie_block));
kvm_vcpu_uninit(vcpu);
@@ -372,6 +524,7 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
if (!kvm_is_ucontrol(kvm))
gmap_free(kvm->arch.gmap);
kvm_s390_destroy_adapters(kvm);
+ kvm_s390_clear_float_irqs(kvm);
}
/* Section: vcpu related */
@@ -442,7 +595,7 @@ static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->pp = 0;
vcpu->arch.pfault_token = KVM_S390_PFAULT_TOKEN_INVALID;
kvm_clear_async_pf_completion_queue(vcpu);
- atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_vcpu_stop(vcpu);
kvm_s390_clear_local_irqs(vcpu);
}
@@ -451,9 +604,26 @@ int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
return 0;
}
+void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu)
+{
+ free_page(vcpu->arch.sie_block->cbrlo);
+ vcpu->arch.sie_block->cbrlo = 0;
+}
+
+int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu)
+{
+ vcpu->arch.sie_block->cbrlo = get_zeroed_page(GFP_KERNEL);
+ if (!vcpu->arch.sie_block->cbrlo)
+ return -ENOMEM;
+
+ vcpu->arch.sie_block->ecb2 |= 0x80;
+ vcpu->arch.sie_block->ecb2 &= ~0x08;
+ return 0;
+}
+
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
{
- struct page *cbrl;
+ int rc = 0;
atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH |
CPUSTAT_SM |
@@ -464,15 +634,17 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->ecb |= 0x10;
vcpu->arch.sie_block->ecb2 = 8;
- vcpu->arch.sie_block->eca = 0xC1002001U;
+ vcpu->arch.sie_block->eca = 0xD1002000U;
+ if (sclp_has_siif())
+ vcpu->arch.sie_block->eca |= 1;
vcpu->arch.sie_block->fac = (int) (long) vfacilities;
- if (kvm_enabled_cmma()) {
- cbrl = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (cbrl) {
- vcpu->arch.sie_block->ecb2 |= 0x80;
- vcpu->arch.sie_block->ecb2 &= ~0x08;
- vcpu->arch.sie_block->cbrlo = page_to_phys(cbrl);
- }
+ vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE |
+ ICTL_TPROT;
+
+ if (kvm_s390_cmma_enabled(vcpu->kvm)) {
+ rc = kvm_s390_vcpu_setup_cmma(vcpu);
+ if (rc)
+ return rc;
}
hrtimer_init(&vcpu->arch.ckc_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
tasklet_init(&vcpu->arch.tasklet, kvm_s390_tasklet,
@@ -480,7 +652,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.ckc_timer.function = kvm_s390_idle_wakeup;
get_cpu_id(&vcpu->arch.cpu_id);
vcpu->arch.cpu_id.version = 0xff;
- return 0;
+ return rc;
}
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
@@ -584,7 +756,7 @@ static void kvm_gmap_notifier(struct gmap *gmap, unsigned long address)
kvm_for_each_vcpu(i, vcpu, kvm) {
/* match against both prefix pages */
- if (vcpu->arch.sie_block->prefix == (address & ~0x1000UL)) {
+ if (kvm_s390_get_prefix(vcpu) == (address & ~0x1000UL)) {
VCPU_EVENT(vcpu, 2, "gmap notifier for %lx", address);
kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
exit_sie_sync(vcpu);
@@ -769,10 +941,40 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
return -EINVAL; /* not implemented yet */
}
+#define VALID_GUESTDBG_FLAGS (KVM_GUESTDBG_SINGLESTEP | \
+ KVM_GUESTDBG_USE_HW_BP | \
+ KVM_GUESTDBG_ENABLE)
+
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
struct kvm_guest_debug *dbg)
{
- return -EINVAL; /* not implemented yet */
+ int rc = 0;
+
+ vcpu->guest_debug = 0;
+ kvm_s390_clear_bp_data(vcpu);
+
+ if (dbg->control & ~VALID_GUESTDBG_FLAGS)
+ return -EINVAL;
+
+ if (dbg->control & KVM_GUESTDBG_ENABLE) {
+ vcpu->guest_debug = dbg->control;
+ /* enforce guest PER */
+ atomic_set_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+
+ if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
+ rc = kvm_s390_import_bp_data(vcpu, dbg);
+ } else {
+ atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ vcpu->arch.guestdbg.last_bp = 0;
+ }
+
+ if (rc) {
+ vcpu->guest_debug = 0;
+ kvm_s390_clear_bp_data(vcpu);
+ atomic_clear_mask(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ }
+
+ return rc;
}
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
@@ -787,8 +989,27 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
return -EINVAL; /* not implemented yet */
}
+bool kvm_s390_cmma_enabled(struct kvm *kvm)
+{
+ if (!MACHINE_IS_LPAR)
+ return false;
+ /* only enable for z10 and later */
+ if (!MACHINE_HAS_EDAT1)
+ return false;
+ if (!kvm->arch.use_cmma)
+ return false;
+ return true;
+}
+
+static bool ibs_enabled(struct kvm_vcpu *vcpu)
+{
+ return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_IBS;
+}
+
static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
{
+retry:
+ s390_vcpu_unblock(vcpu);
/*
* We use MMU_RELOAD just to re-arm the ipte notifier for the
* guest prefix page. gmap_ipte_notify will wait on the ptl lock.
@@ -796,27 +1017,61 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
* already finished. We might race against a second unmapper that
* wants to set the blocking bit. Lets just retry the request loop.
*/
- while (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
+ if (kvm_check_request(KVM_REQ_MMU_RELOAD, vcpu)) {
int rc;
rc = gmap_ipte_notify(vcpu->arch.gmap,
- vcpu->arch.sie_block->prefix,
+ kvm_s390_get_prefix(vcpu),
PAGE_SIZE * 2);
if (rc)
return rc;
- s390_vcpu_unblock(vcpu);
+ goto retry;
+ }
+
+ if (kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu)) {
+ if (!ibs_enabled(vcpu)) {
+ trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 1);
+ atomic_set_mask(CPUSTAT_IBS,
+ &vcpu->arch.sie_block->cpuflags);
+ }
+ goto retry;
}
+
+ if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
+ if (ibs_enabled(vcpu)) {
+ trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
+ atomic_clear_mask(CPUSTAT_IBS,
+ &vcpu->arch.sie_block->cpuflags);
+ }
+ goto retry;
+ }
+
return 0;
}
-static long kvm_arch_fault_in_sync(struct kvm_vcpu *vcpu)
+/**
+ * kvm_arch_fault_in_page - fault-in guest page if necessary
+ * @vcpu: The corresponding virtual cpu
+ * @gpa: Guest physical address
+ * @writable: Whether the page should be writable or not
+ *
+ * Make sure that a guest page has been faulted-in on the host.
+ *
+ * Return: Zero on success, negative error code otherwise.
+ */
+long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable)
{
- long rc;
- hva_t fault = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap);
struct mm_struct *mm = current->mm;
+ hva_t hva;
+ long rc;
+
+ hva = gmap_fault(gpa, vcpu->arch.gmap);
+ if (IS_ERR_VALUE(hva))
+ return (long)hva;
down_read(&mm->mmap_sem);
- rc = get_user_pages(current, mm, fault, 1, 1, 0, NULL, NULL);
+ rc = get_user_pages(current, mm, hva, 1, writable, 0, NULL, NULL);
up_read(&mm->mmap_sem);
- return rc;
+
+ return rc < 0 ? rc : 0;
}
static void __kvm_inject_pfault_token(struct kvm_vcpu *vcpu, bool start_token,
@@ -883,8 +1138,9 @@ static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu)
if (!vcpu->arch.gmap->pfault_enabled)
return 0;
- hva = gmap_fault(current->thread.gmap_addr, vcpu->arch.gmap);
- if (copy_from_guest(vcpu, &arch.pfault_token, vcpu->arch.pfault_token, 8))
+ hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(current->thread.gmap_addr));
+ hva += current->thread.gmap_addr & ~PAGE_MASK;
+ if (read_guest_real(vcpu, vcpu->arch.pfault_token, &arch.pfault_token, 8))
return 0;
rc = kvm_setup_async_pf(vcpu, current->thread.gmap_addr, hva, &arch);
@@ -917,6 +1173,11 @@ static int vcpu_pre_run(struct kvm_vcpu *vcpu)
if (rc)
return rc;
+ if (guestdbg_enabled(vcpu)) {
+ kvm_s390_backup_guest_per_regs(vcpu);
+ kvm_s390_patch_guest_per_regs(vcpu);
+ }
+
vcpu->arch.sie_block->icptcode = 0;
cpuflags = atomic_read(&vcpu->arch.sie_block->cpuflags);
VCPU_EVENT(vcpu, 6, "entering sie flags %x", cpuflags);
@@ -933,6 +1194,9 @@ static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
vcpu->arch.sie_block->icptcode);
trace_kvm_s390_sie_exit(vcpu, vcpu->arch.sie_block->icptcode);
+ if (guestdbg_enabled(vcpu))
+ kvm_s390_restore_guest_per_regs(vcpu);
+
if (exit_reason >= 0) {
rc = 0;
} else if (kvm_is_ucontrol(vcpu->kvm)) {
@@ -945,9 +1209,12 @@ static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
} else if (current->thread.gmap_pfault) {
trace_kvm_s390_major_guest_pfault(vcpu);
current->thread.gmap_pfault = 0;
- if (kvm_arch_setup_async_pf(vcpu) ||
- (kvm_arch_fault_in_sync(vcpu) >= 0))
+ if (kvm_arch_setup_async_pf(vcpu)) {
rc = 0;
+ } else {
+ gpa_t gpa = current->thread.gmap_addr;
+ rc = kvm_arch_fault_in_page(vcpu, gpa, 1);
+ }
}
if (rc == -1) {
@@ -969,16 +1236,6 @@ static int vcpu_post_run(struct kvm_vcpu *vcpu, int exit_reason)
return rc;
}
-bool kvm_enabled_cmma(void)
-{
- if (!MACHINE_IS_LPAR)
- return false;
- /* only enable for z10 and later */
- if (!MACHINE_HAS_EDAT1)
- return false;
- return true;
-}
-
static int __vcpu_run(struct kvm_vcpu *vcpu)
{
int rc, exit_reason;
@@ -1008,7 +1265,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
rc = vcpu_post_run(vcpu, exit_reason);
- } while (!signal_pending(current) && !rc);
+ } while (!signal_pending(current) && !guestdbg_exit_pending(vcpu) && !rc);
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
return rc;
@@ -1019,10 +1276,15 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
int rc;
sigset_t sigsaved;
+ if (guestdbg_exit_pending(vcpu)) {
+ kvm_s390_prepare_debug_exit(vcpu);
+ return 0;
+ }
+
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
- atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_vcpu_start(vcpu);
switch (kvm_run->exit_reason) {
case KVM_EXIT_S390_SIEIC:
@@ -1031,6 +1293,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
case KVM_EXIT_S390_RESET:
case KVM_EXIT_S390_UCONTROL:
case KVM_EXIT_S390_TSCH:
+ case KVM_EXIT_DEBUG:
break;
default:
BUG();
@@ -1056,6 +1319,11 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
rc = -EINTR;
}
+ if (guestdbg_exit_pending(vcpu) && !rc) {
+ kvm_s390_prepare_debug_exit(vcpu);
+ rc = 0;
+ }
+
if (rc == -EOPNOTSUPP) {
/* intercept cannot be handled in-kernel, prepare kvm-run */
kvm_run->exit_reason = KVM_EXIT_S390_SIEIC;
@@ -1073,7 +1341,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask;
kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr;
- kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix;
+ kvm_run->s.regs.prefix = kvm_s390_get_prefix(vcpu);
memcpy(&kvm_run->s.regs.crs, &vcpu->arch.sie_block->gcr, 128);
if (vcpu->sigset_active)
@@ -1083,83 +1351,52 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
return rc;
}
-static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, void *from,
- unsigned long n, int prefix)
-{
- if (prefix)
- return copy_to_guest(vcpu, guestdest, from, n);
- else
- return copy_to_guest_absolute(vcpu, guestdest, from, n);
-}
-
/*
* store status at address
* we use have two special cases:
* KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
* KVM_S390_STORE_STATUS_PREFIXED: -> prefix
*/
-int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr)
+int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long gpa)
{
unsigned char archmode = 1;
- int prefix;
+ unsigned int px;
u64 clkcomp;
+ int rc;
- if (addr == KVM_S390_STORE_STATUS_NOADDR) {
- if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1))
+ if (gpa == KVM_S390_STORE_STATUS_NOADDR) {
+ if (write_guest_abs(vcpu, 163, &archmode, 1))
return -EFAULT;
- addr = SAVE_AREA_BASE;
- prefix = 0;
- } else if (addr == KVM_S390_STORE_STATUS_PREFIXED) {
- if (copy_to_guest(vcpu, 163ul, &archmode, 1))
+ gpa = SAVE_AREA_BASE;
+ } else if (gpa == KVM_S390_STORE_STATUS_PREFIXED) {
+ if (write_guest_real(vcpu, 163, &archmode, 1))
return -EFAULT;
- addr = SAVE_AREA_BASE;
- prefix = 1;
- } else
- prefix = 0;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, fp_regs),
- vcpu->arch.guest_fpregs.fprs, 128, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, gp_regs),
- vcpu->run->s.regs.gprs, 128, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, psw),
- &vcpu->arch.sie_block->gpsw, 16, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, pref_reg),
- &vcpu->arch.sie_block->prefix, 4, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu,
- addr + offsetof(struct save_area, fp_ctrl_reg),
- &vcpu->arch.guest_fpregs.fpc, 4, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, tod_reg),
- &vcpu->arch.sie_block->todpr, 4, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, timer),
- &vcpu->arch.sie_block->cputm, 8, prefix))
- return -EFAULT;
-
+ gpa = kvm_s390_real_to_abs(vcpu, SAVE_AREA_BASE);
+ }
+ rc = write_guest_abs(vcpu, gpa + offsetof(struct save_area, fp_regs),
+ vcpu->arch.guest_fpregs.fprs, 128);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, gp_regs),
+ vcpu->run->s.regs.gprs, 128);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, psw),
+ &vcpu->arch.sie_block->gpsw, 16);
+ px = kvm_s390_get_prefix(vcpu);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, pref_reg),
+ &px, 4);
+ rc |= write_guest_abs(vcpu,
+ gpa + offsetof(struct save_area, fp_ctrl_reg),
+ &vcpu->arch.guest_fpregs.fpc, 4);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, tod_reg),
+ &vcpu->arch.sie_block->todpr, 4);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, timer),
+ &vcpu->arch.sie_block->cputm, 8);
clkcomp = vcpu->arch.sie_block->ckc >> 8;
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, clk_cmp),
- &clkcomp, 8, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu, addr + offsetof(struct save_area, acc_regs),
- &vcpu->run->s.regs.acrs, 64, prefix))
- return -EFAULT;
-
- if (__guestcopy(vcpu,
- addr + offsetof(struct save_area, ctrl_regs),
- &vcpu->arch.sie_block->gcr, 128, prefix))
- return -EFAULT;
- return 0;
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, clk_cmp),
+ &clkcomp, 8);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, acc_regs),
+ &vcpu->run->s.regs.acrs, 64);
+ rc |= write_guest_abs(vcpu, gpa + offsetof(struct save_area, ctrl_regs),
+ &vcpu->arch.sie_block->gcr, 128);
+ return rc ? -EFAULT : 0;
}
int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
@@ -1176,6 +1413,109 @@ int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
return kvm_s390_store_status_unloaded(vcpu, addr);
}
+static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
+{
+ return atomic_read(&(vcpu)->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
+}
+
+static void __disable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
+{
+ kvm_check_request(KVM_REQ_ENABLE_IBS, vcpu);
+ kvm_make_request(KVM_REQ_DISABLE_IBS, vcpu);
+ exit_sie_sync(vcpu);
+}
+
+static void __disable_ibs_on_all_vcpus(struct kvm *kvm)
+{
+ unsigned int i;
+ struct kvm_vcpu *vcpu;
+
+ kvm_for_each_vcpu(i, vcpu, kvm) {
+ __disable_ibs_on_vcpu(vcpu);
+ }
+}
+
+static void __enable_ibs_on_vcpu(struct kvm_vcpu *vcpu)
+{
+ kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu);
+ kvm_make_request(KVM_REQ_ENABLE_IBS, vcpu);
+ exit_sie_sync(vcpu);
+}
+
+void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
+{
+ int i, online_vcpus, started_vcpus = 0;
+
+ if (!is_vcpu_stopped(vcpu))
+ return;
+
+ trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 1);
+ /* Only one cpu at a time may enter/leave the STOPPED state. */
+ spin_lock_bh(&vcpu->kvm->arch.start_stop_lock);
+ online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
+
+ for (i = 0; i < online_vcpus; i++) {
+ if (!is_vcpu_stopped(vcpu->kvm->vcpus[i]))
+ started_vcpus++;
+ }
+
+ if (started_vcpus == 0) {
+ /* we're the only active VCPU -> speed it up */
+ __enable_ibs_on_vcpu(vcpu);
+ } else if (started_vcpus == 1) {
+ /*
+ * As we are starting a second VCPU, we have to disable
+ * the IBS facility on all VCPUs to remove potentially
+ * oustanding ENABLE requests.
+ */
+ __disable_ibs_on_all_vcpus(vcpu->kvm);
+ }
+
+ atomic_clear_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ /*
+ * Another VCPU might have used IBS while we were offline.
+ * Let's play safe and flush the VCPU at startup.
+ */
+ vcpu->arch.sie_block->ihcpu = 0xffff;
+ spin_unlock_bh(&vcpu->kvm->arch.start_stop_lock);
+ return;
+}
+
+void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu)
+{
+ int i, online_vcpus, started_vcpus = 0;
+ struct kvm_vcpu *started_vcpu = NULL;
+
+ if (is_vcpu_stopped(vcpu))
+ return;
+
+ trace_kvm_s390_vcpu_start_stop(vcpu->vcpu_id, 0);
+ /* Only one cpu at a time may enter/leave the STOPPED state. */
+ spin_lock_bh(&vcpu->kvm->arch.start_stop_lock);
+ online_vcpus = atomic_read(&vcpu->kvm->online_vcpus);
+
+ atomic_set_mask(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ __disable_ibs_on_vcpu(vcpu);
+
+ for (i = 0; i < online_vcpus; i++) {
+ if (!is_vcpu_stopped(vcpu->kvm->vcpus[i])) {
+ started_vcpus++;
+ started_vcpu = vcpu->kvm->vcpus[i];
+ }
+ }
+
+ if (started_vcpus == 1) {
+ /*
+ * As we only have one VCPU left, we want to enable the
+ * IBS facility for that VCPU to speed it up.
+ */
+ __enable_ibs_on_vcpu(started_vcpu);
+ }
+
+ spin_unlock_bh(&vcpu->kvm->arch.start_stop_lock);
+ return;
+}
+
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
struct kvm_enable_cap *cap)
{
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index 3c1e2274d9ea..a8655ed31616 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -28,7 +28,6 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu);
/* Transactional Memory Execution related macros */
#define IS_TE_ENABLED(vcpu) ((vcpu->arch.sie_block->ecb & 0x10))
-#define TDB_ADDR 0x1800UL
#define TDB_FORMAT1 1
#define IS_ITDB_VALID(vcpu) ((*(char *)vcpu->arch.sie_block->itdba == TDB_FORMAT1))
@@ -62,9 +61,15 @@ static inline int kvm_is_ucontrol(struct kvm *kvm)
#endif
}
+#define GUEST_PREFIX_SHIFT 13
+static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu)
+{
+ return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT;
+}
+
static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix)
{
- vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u;
+ vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT;
vcpu->arch.sie_block->ihcpu = 0xffff;
kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu);
}
@@ -130,6 +135,7 @@ void kvm_s390_tasklet(unsigned long parm);
void kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu);
void kvm_s390_deliver_pending_machine_checks(struct kvm_vcpu *vcpu);
void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu);
+void kvm_s390_clear_float_irqs(struct kvm *kvm);
int __must_check kvm_s390_inject_vm(struct kvm *kvm,
struct kvm_s390_interrupt *s390int);
int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
@@ -137,35 +143,94 @@ int __must_check kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu,
int __must_check kvm_s390_inject_program_int(struct kvm_vcpu *vcpu, u16 code);
struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm,
u64 cr6, u64 schid);
+void kvm_s390_reinject_io_int(struct kvm *kvm,
+ struct kvm_s390_interrupt_info *inti);
int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked);
/* implemented in priv.c */
+int is_valid_psw(psw_t *psw);
int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu);
int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu);
int kvm_s390_handle_eb(struct kvm_vcpu *vcpu);
/* implemented in sigp.c */
int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu);
/* implemented in kvm-s390.c */
+long kvm_arch_fault_in_page(struct kvm_vcpu *vcpu, gpa_t gpa, int writable);
int kvm_s390_store_status_unloaded(struct kvm_vcpu *vcpu, unsigned long addr);
int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr);
+void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_stop(struct kvm_vcpu *vcpu);
void s390_vcpu_block(struct kvm_vcpu *vcpu);
void s390_vcpu_unblock(struct kvm_vcpu *vcpu);
void exit_sie(struct kvm_vcpu *vcpu);
void exit_sie_sync(struct kvm_vcpu *vcpu);
-/* are we going to support cmma? */
-bool kvm_enabled_cmma(void);
+int kvm_s390_vcpu_setup_cmma(struct kvm_vcpu *vcpu);
+void kvm_s390_vcpu_unsetup_cmma(struct kvm_vcpu *vcpu);
+/* is cmma enabled */
+bool kvm_s390_cmma_enabled(struct kvm *kvm);
+int test_vfacility(unsigned long nr);
+
/* implemented in diag.c */
int kvm_s390_handle_diag(struct kvm_vcpu *vcpu);
+/* implemented in interrupt.c */
+int kvm_s390_inject_prog_irq(struct kvm_vcpu *vcpu,
+ struct kvm_s390_pgm_info *pgm_info);
+
+/**
+ * kvm_s390_inject_prog_cond - conditionally inject a program check
+ * @vcpu: virtual cpu
+ * @rc: original return/error code
+ *
+ * This function is supposed to be used after regular guest access functions
+ * failed, to conditionally inject a program check to a vcpu. The typical
+ * pattern would look like
+ *
+ * rc = write_guest(vcpu, addr, data, len);
+ * if (rc)
+ * return kvm_s390_inject_prog_cond(vcpu, rc);
+ *
+ * A negative return code from guest access functions implies an internal error
+ * like e.g. out of memory. In these cases no program check should be injected
+ * to the guest.
+ * A positive value implies that an exception happened while accessing a guest's
+ * memory. In this case all data belonging to the corresponding program check
+ * has been stored in vcpu->arch.pgm and can be injected with
+ * kvm_s390_inject_prog_irq().
+ *
+ * Returns: - the original @rc value if @rc was negative (internal error)
+ * - zero if @rc was already zero
+ * - zero or error code from injecting if @rc was positive
+ * (program check injected to @vcpu)
+ */
+static inline int kvm_s390_inject_prog_cond(struct kvm_vcpu *vcpu, int rc)
+{
+ if (rc <= 0)
+ return rc;
+ return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
+}
/* implemented in interrupt.c */
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu);
int psw_extint_disabled(struct kvm_vcpu *vcpu);
void kvm_s390_destroy_adapters(struct kvm *kvm);
+int kvm_s390_si_ext_call_pending(struct kvm_vcpu *vcpu);
+
+/* implemented in guestdbg.c */
+void kvm_s390_backup_guest_per_regs(struct kvm_vcpu *vcpu);
+void kvm_s390_restore_guest_per_regs(struct kvm_vcpu *vcpu);
+void kvm_s390_patch_guest_per_regs(struct kvm_vcpu *vcpu);
+int kvm_s390_import_bp_data(struct kvm_vcpu *vcpu,
+ struct kvm_guest_debug *dbg);
+void kvm_s390_clear_bp_data(struct kvm_vcpu *vcpu);
+void kvm_s390_prepare_debug_exit(struct kvm_vcpu *vcpu);
+void kvm_s390_handle_per_event(struct kvm_vcpu *vcpu);
#endif
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 476e9e218f43..f89c1cd67751 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -35,8 +35,8 @@ static int handle_set_clock(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu *cpup;
s64 hostclk, val;
+ int i, rc;
u64 op2;
- int i;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
@@ -44,8 +44,9 @@ static int handle_set_clock(struct kvm_vcpu *vcpu)
op2 = kvm_s390_get_base_disp_s(vcpu);
if (op2 & 7) /* Operand must be on a doubleword boundary */
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- if (get_guest(vcpu, val, (u64 __user *) op2))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = read_guest(vcpu, op2, &val, sizeof(val));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
if (store_tod_clock(&hostclk)) {
kvm_s390_set_psw_cc(vcpu, 3);
@@ -65,8 +66,8 @@ static int handle_set_clock(struct kvm_vcpu *vcpu)
static int handle_set_prefix(struct kvm_vcpu *vcpu)
{
u64 operand2;
- u32 address = 0;
- u8 tmp;
+ u32 address;
+ int rc;
vcpu->stat.instruction_spx++;
@@ -80,14 +81,18 @@ static int handle_set_prefix(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
/* get the value */
- if (get_guest(vcpu, address, (u32 __user *) operand2))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = read_guest(vcpu, operand2, &address, sizeof(address));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
- address = address & 0x7fffe000u;
+ address &= 0x7fffe000u;
- /* make sure that the new value is valid memory */
- if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
- (copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)))
+ /*
+ * Make sure the new value is valid memory. We only need to check the
+ * first page, since address is 8k aligned and memory pieces are always
+ * at least 1MB aligned and have at least a size of 1MB.
+ */
+ if (kvm_is_error_gpa(vcpu->kvm, address))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
kvm_s390_set_prefix(vcpu, address);
@@ -101,6 +106,7 @@ static int handle_store_prefix(struct kvm_vcpu *vcpu)
{
u64 operand2;
u32 address;
+ int rc;
vcpu->stat.instruction_stpx++;
@@ -113,12 +119,12 @@ static int handle_store_prefix(struct kvm_vcpu *vcpu)
if (operand2 & 3)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- address = vcpu->arch.sie_block->prefix;
- address = address & 0x7fffe000u;
+ address = kvm_s390_get_prefix(vcpu);
/* get the value */
- if (put_guest(vcpu, address, (u32 __user *)operand2))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = write_guest(vcpu, operand2, &address, sizeof(address));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
VCPU_EVENT(vcpu, 5, "storing prefix to %x", address);
trace_kvm_s390_handle_prefix(vcpu, 0, address);
@@ -127,28 +133,44 @@ static int handle_store_prefix(struct kvm_vcpu *vcpu)
static int handle_store_cpu_address(struct kvm_vcpu *vcpu)
{
- u64 useraddr;
+ u16 vcpu_id = vcpu->vcpu_id;
+ u64 ga;
+ int rc;
vcpu->stat.instruction_stap++;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
- useraddr = kvm_s390_get_base_disp_s(vcpu);
+ ga = kvm_s390_get_base_disp_s(vcpu);
- if (useraddr & 1)
+ if (ga & 1)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- if (put_guest(vcpu, vcpu->vcpu_id, (u16 __user *)useraddr))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = write_guest(vcpu, ga, &vcpu_id, sizeof(vcpu_id));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
- VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", useraddr);
- trace_kvm_s390_handle_stap(vcpu, useraddr);
+ VCPU_EVENT(vcpu, 5, "storing cpu address to %llx", ga);
+ trace_kvm_s390_handle_stap(vcpu, ga);
return 0;
}
+static void __skey_check_enable(struct kvm_vcpu *vcpu)
+{
+ if (!(vcpu->arch.sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)))
+ return;
+
+ s390_enable_skey();
+ trace_kvm_s390_skey_related_inst(vcpu);
+ vcpu->arch.sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE);
+}
+
+
static int handle_skey(struct kvm_vcpu *vcpu)
{
+ __skey_check_enable(vcpu);
+
vcpu->stat.instruction_storage_key++;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
@@ -160,9 +182,21 @@ static int handle_skey(struct kvm_vcpu *vcpu)
return 0;
}
+static int handle_ipte_interlock(struct kvm_vcpu *vcpu)
+{
+ psw_t *psw = &vcpu->arch.sie_block->gpsw;
+
+ vcpu->stat.instruction_ipte_interlock++;
+ if (psw_bits(*psw).p)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+ wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu));
+ psw->addr = __rewind_psw(*psw, 4);
+ VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation");
+ return 0;
+}
+
static int handle_test_block(struct kvm_vcpu *vcpu)
{
- unsigned long hva;
gpa_t addr;
int reg2;
@@ -171,16 +205,18 @@ static int handle_test_block(struct kvm_vcpu *vcpu)
kvm_s390_get_regs_rre(vcpu, NULL, &reg2);
addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
+ addr = kvm_s390_logical_to_effective(vcpu, addr);
+ if (kvm_s390_check_low_addr_protection(vcpu, addr))
+ return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
addr = kvm_s390_real_to_abs(vcpu, addr);
- hva = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
- if (kvm_is_error_hva(hva))
+ if (kvm_is_error_gpa(vcpu->kvm, addr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
/*
* We don't expect errors on modern systems, and do not care
* about storage keys (yet), so let's just clear the page.
*/
- if (clear_user((void __user *)hva, PAGE_SIZE) != 0)
+ if (kvm_clear_guest(vcpu->kvm, addr, PAGE_SIZE))
return -EFAULT;
kvm_s390_set_psw_cc(vcpu, 0);
vcpu->run->s.regs.gprs[0] = 0;
@@ -190,9 +226,12 @@ static int handle_test_block(struct kvm_vcpu *vcpu)
static int handle_tpi(struct kvm_vcpu *vcpu)
{
struct kvm_s390_interrupt_info *inti;
+ unsigned long len;
+ u32 tpi_data[3];
+ int cc, rc;
u64 addr;
- int cc;
+ rc = 0;
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 3)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -201,30 +240,41 @@ static int handle_tpi(struct kvm_vcpu *vcpu)
if (!inti)
goto no_interrupt;
cc = 1;
+ tpi_data[0] = inti->io.subchannel_id << 16 | inti->io.subchannel_nr;
+ tpi_data[1] = inti->io.io_int_parm;
+ tpi_data[2] = inti->io.io_int_word;
if (addr) {
/*
* Store the two-word I/O interruption code into the
* provided area.
*/
- if (put_guest(vcpu, inti->io.subchannel_id, (u16 __user *)addr)
- || put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *)(addr + 2))
- || put_guest(vcpu, inti->io.io_int_parm, (u32 __user *)(addr + 4)))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ len = sizeof(tpi_data) - 4;
+ rc = write_guest(vcpu, addr, &tpi_data, len);
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
} else {
/*
* Store the three-word I/O interruption code into
* the appropriate lowcore area.
*/
- put_guest(vcpu, inti->io.subchannel_id, (u16 __user *) __LC_SUBCHANNEL_ID);
- put_guest(vcpu, inti->io.subchannel_nr, (u16 __user *) __LC_SUBCHANNEL_NR);
- put_guest(vcpu, inti->io.io_int_parm, (u32 __user *) __LC_IO_INT_PARM);
- put_guest(vcpu, inti->io.io_int_word, (u32 __user *) __LC_IO_INT_WORD);
+ len = sizeof(tpi_data);
+ if (write_guest_lc(vcpu, __LC_SUBCHANNEL_ID, &tpi_data, len))
+ rc = -EFAULT;
}
- kfree(inti);
+ /*
+ * If we encounter a problem storing the interruption code, the
+ * instruction is suppressed from the guest's view: reinject the
+ * interrupt.
+ */
+ if (!rc)
+ kfree(inti);
+ else
+ kvm_s390_reinject_io_int(vcpu->kvm, inti);
no_interrupt:
/* Set condition code and we're done. */
- kvm_s390_set_psw_cc(vcpu, cc);
- return 0;
+ if (!rc)
+ kvm_s390_set_psw_cc(vcpu, cc);
+ return rc ? -EFAULT : 0;
}
static int handle_tsch(struct kvm_vcpu *vcpu)
@@ -292,10 +342,10 @@ static int handle_stfl(struct kvm_vcpu *vcpu)
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
- rc = copy_to_guest(vcpu, offsetof(struct _lowcore, stfl_fac_list),
- vfacilities, 4);
+ rc = write_guest_lc(vcpu, offsetof(struct _lowcore, stfl_fac_list),
+ vfacilities, 4);
if (rc)
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ return rc;
VCPU_EVENT(vcpu, 5, "store facility list value %x",
*(unsigned int *) vfacilities);
trace_kvm_s390_handle_stfl(vcpu, *(unsigned int *) vfacilities);
@@ -314,7 +364,8 @@ static void handle_new_psw(struct kvm_vcpu *vcpu)
#define PSW_ADDR_24 0x0000000000ffffffUL
#define PSW_ADDR_31 0x000000007fffffffUL
-static int is_valid_psw(psw_t *psw) {
+int is_valid_psw(psw_t *psw)
+{
if (psw->mask & PSW_MASK_UNASSIGNED)
return 0;
if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_BA) {
@@ -325,6 +376,8 @@ static int is_valid_psw(psw_t *psw) {
return 0;
if ((psw->mask & PSW_MASK_ADDR_MODE) == PSW_MASK_EA)
return 0;
+ if (psw->addr & 1)
+ return 0;
return 1;
}
@@ -333,6 +386,7 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
psw_t *gpsw = &vcpu->arch.sie_block->gpsw;
psw_compat_t new_psw;
u64 addr;
+ int rc;
if (gpsw->mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
@@ -340,8 +394,10 @@ int kvm_s390_handle_lpsw(struct kvm_vcpu *vcpu)
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+
+ rc = read_guest(vcpu, addr, &new_psw, sizeof(new_psw));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
if (!(new_psw.mask & PSW32_MASK_BASE))
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
gpsw->mask = (new_psw.mask & ~PSW32_MASK_BASE) << 32;
@@ -357,6 +413,7 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
{
psw_t new_psw;
u64 addr;
+ int rc;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
@@ -364,8 +421,9 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
addr = kvm_s390_get_base_disp_s(vcpu);
if (addr & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- if (copy_from_guest(vcpu, &new_psw, addr, sizeof(new_psw)))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = read_guest(vcpu, addr, &new_psw, sizeof(new_psw));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
vcpu->arch.sie_block->gpsw = new_psw;
if (!is_valid_psw(&vcpu->arch.sie_block->gpsw))
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
@@ -375,7 +433,9 @@ static int handle_lpswe(struct kvm_vcpu *vcpu)
static int handle_stidp(struct kvm_vcpu *vcpu)
{
+ u64 stidp_data = vcpu->arch.stidp_data;
u64 operand2;
+ int rc;
vcpu->stat.instruction_stidp++;
@@ -387,8 +447,9 @@ static int handle_stidp(struct kvm_vcpu *vcpu)
if (operand2 & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- if (put_guest(vcpu, vcpu->arch.stidp_data, (u64 __user *)operand2))
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ rc = write_guest(vcpu, operand2, &stidp_data, sizeof(stidp_data));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
VCPU_EVENT(vcpu, 5, "%s", "store cpu id");
return 0;
@@ -474,9 +535,10 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
break;
}
- if (copy_to_guest_absolute(vcpu, operand2, (void *) mem, PAGE_SIZE)) {
- rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
- goto out_exception;
+ rc = write_guest(vcpu, operand2, (void *)mem, PAGE_SIZE);
+ if (rc) {
+ rc = kvm_s390_inject_prog_cond(vcpu, rc);
+ goto out;
}
trace_kvm_s390_handle_stsi(vcpu, fc, sel1, sel2, operand2);
free_page(mem);
@@ -485,7 +547,7 @@ static int handle_stsi(struct kvm_vcpu *vcpu)
return 0;
out_no_data:
kvm_s390_set_psw_cc(vcpu, 3);
-out_exception:
+out:
free_page(mem);
return rc;
}
@@ -496,6 +558,7 @@ static const intercept_handler_t b2_handlers[256] = {
[0x10] = handle_set_prefix,
[0x11] = handle_store_prefix,
[0x12] = handle_store_cpu_address,
+ [0x21] = handle_ipte_interlock,
[0x29] = handle_skey,
[0x2a] = handle_skey,
[0x2b] = handle_skey,
@@ -513,6 +576,7 @@ static const intercept_handler_t b2_handlers[256] = {
[0x3a] = handle_io_inst,
[0x3b] = handle_io_inst,
[0x3c] = handle_io_inst,
+ [0x50] = handle_ipte_interlock,
[0x5f] = handle_io_inst,
[0x74] = handle_io_inst,
[0x76] = handle_io_inst,
@@ -591,6 +655,11 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
start = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
+ if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
+ if (kvm_s390_check_low_addr_protection(vcpu, start))
+ return kvm_s390_inject_prog_irq(vcpu, &vcpu->arch.pgm);
+ }
+
switch (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
case 0x00000000:
end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
@@ -606,10 +675,15 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
}
while (start < end) {
- unsigned long useraddr;
-
- useraddr = gmap_translate(start, vcpu->arch.gmap);
- if (IS_ERR((void *)useraddr))
+ unsigned long useraddr, abs_addr;
+
+ /* Translate guest address to host address */
+ if ((vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) == 0)
+ abs_addr = kvm_s390_real_to_abs(vcpu, start);
+ else
+ abs_addr = start;
+ useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(abs_addr));
+ if (kvm_is_error_hva(useraddr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
@@ -618,6 +692,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
}
if (vcpu->run->s.regs.gprs[reg1] & PFMF_SK) {
+ __skey_check_enable(vcpu);
if (set_guest_storage_key(current->mm, useraddr,
vcpu->run->s.regs.gprs[reg1] & PFMF_KEY,
vcpu->run->s.regs.gprs[reg1] & PFMF_NQ))
@@ -642,7 +717,7 @@ static int handle_essa(struct kvm_vcpu *vcpu)
VCPU_EVENT(vcpu, 5, "cmma release %d pages", entries);
gmap = vcpu->arch.gmap;
vcpu->stat.instruction_essa++;
- if (!kvm_enabled_cmma() || !vcpu->arch.sie_block->cbrlo)
+ if (!kvm_s390_cmma_enabled(vcpu->kvm))
return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
@@ -672,7 +747,10 @@ static int handle_essa(struct kvm_vcpu *vcpu)
}
static const intercept_handler_t b9_handlers[256] = {
+ [0x8a] = handle_ipte_interlock,
[0x8d] = handle_epsw,
+ [0x8e] = handle_ipte_interlock,
+ [0x8f] = handle_ipte_interlock,
[0xab] = handle_essa,
[0xaf] = handle_pfmf,
};
@@ -693,32 +771,67 @@ int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu)
{
int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
- u64 useraddr;
u32 val = 0;
int reg, rc;
+ u64 ga;
vcpu->stat.instruction_lctl++;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
- useraddr = kvm_s390_get_base_disp_rs(vcpu);
+ ga = kvm_s390_get_base_disp_rs(vcpu);
- if (useraddr & 3)
+ if (ga & 3)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
- VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3,
- useraddr);
- trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, useraddr);
+ VCPU_EVENT(vcpu, 5, "lctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
+ trace_kvm_s390_handle_lctl(vcpu, 0, reg1, reg3, ga);
reg = reg1;
do {
- rc = get_guest(vcpu, val, (u32 __user *) useraddr);
+ rc = read_guest(vcpu, ga, &val, sizeof(val));
if (rc)
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ return kvm_s390_inject_prog_cond(vcpu, rc);
vcpu->arch.sie_block->gcr[reg] &= 0xffffffff00000000ul;
vcpu->arch.sie_block->gcr[reg] |= val;
- useraddr += 4;
+ ga += 4;
+ if (reg == reg3)
+ break;
+ reg = (reg + 1) % 16;
+ } while (1);
+
+ return 0;
+}
+
+int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu)
+{
+ int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
+ int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
+ u64 ga;
+ u32 val;
+ int reg, rc;
+
+ vcpu->stat.instruction_stctl++;
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ ga = kvm_s390_get_base_disp_rs(vcpu);
+
+ if (ga & 3)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ VCPU_EVENT(vcpu, 5, "stctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
+ trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga);
+
+ reg = reg1;
+ do {
+ val = vcpu->arch.sie_block->gcr[reg] & 0x00000000fffffffful;
+ rc = write_guest(vcpu, ga, &val, sizeof(val));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
+ ga += 4;
if (reg == reg3)
break;
reg = (reg + 1) % 16;
@@ -731,7 +844,7 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
{
int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
- u64 useraddr;
+ u64 ga, val;
int reg, rc;
vcpu->stat.instruction_lctlg++;
@@ -739,23 +852,58 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
- useraddr = kvm_s390_get_base_disp_rsy(vcpu);
+ ga = kvm_s390_get_base_disp_rsy(vcpu);
- if (useraddr & 7)
+ if (ga & 7)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
reg = reg1;
- VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3,
- useraddr);
- trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, useraddr);
+ VCPU_EVENT(vcpu, 5, "lctlg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
+ trace_kvm_s390_handle_lctl(vcpu, 1, reg1, reg3, ga);
do {
- rc = get_guest(vcpu, vcpu->arch.sie_block->gcr[reg],
- (u64 __user *) useraddr);
+ rc = read_guest(vcpu, ga, &val, sizeof(val));
if (rc)
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
- useraddr += 8;
+ return kvm_s390_inject_prog_cond(vcpu, rc);
+ vcpu->arch.sie_block->gcr[reg] = val;
+ ga += 8;
+ if (reg == reg3)
+ break;
+ reg = (reg + 1) % 16;
+ } while (1);
+
+ return 0;
+}
+
+static int handle_stctg(struct kvm_vcpu *vcpu)
+{
+ int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4;
+ int reg3 = vcpu->arch.sie_block->ipa & 0x000f;
+ u64 ga, val;
+ int reg, rc;
+
+ vcpu->stat.instruction_stctg++;
+
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
+ return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
+
+ ga = kvm_s390_get_base_disp_rsy(vcpu);
+
+ if (ga & 7)
+ return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
+
+ reg = reg1;
+
+ VCPU_EVENT(vcpu, 5, "stctg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga);
+ trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga);
+
+ do {
+ val = vcpu->arch.sie_block->gcr[reg];
+ rc = write_guest(vcpu, ga, &val, sizeof(val));
+ if (rc)
+ return kvm_s390_inject_prog_cond(vcpu, rc);
+ ga += 8;
if (reg == reg3)
break;
reg = (reg + 1) % 16;
@@ -766,6 +914,7 @@ static int handle_lctlg(struct kvm_vcpu *vcpu)
static const intercept_handler_t eb_handlers[256] = {
[0x2f] = handle_lctlg,
+ [0x25] = handle_stctg,
};
int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
@@ -781,8 +930,9 @@ int kvm_s390_handle_eb(struct kvm_vcpu *vcpu)
static int handle_tprot(struct kvm_vcpu *vcpu)
{
u64 address1, address2;
- struct vm_area_struct *vma;
- unsigned long user_address;
+ unsigned long hva, gpa;
+ int ret = 0, cc = 0;
+ bool writable;
vcpu->stat.instruction_tprot++;
@@ -793,32 +943,41 @@ static int handle_tprot(struct kvm_vcpu *vcpu)
/* we only handle the Linux memory detection case:
* access key == 0
- * guest DAT == off
* everything else goes to userspace. */
if (address2 & 0xf0)
return -EOPNOTSUPP;
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
- return -EOPNOTSUPP;
-
- down_read(&current->mm->mmap_sem);
- user_address = __gmap_translate(address1, vcpu->arch.gmap);
- if (IS_ERR_VALUE(user_address))
- goto out_inject;
- vma = find_vma(current->mm, user_address);
- if (!vma)
- goto out_inject;
- vcpu->arch.sie_block->gpsw.mask &= ~(3ul << 44);
- if (!(vma->vm_flags & VM_WRITE) && (vma->vm_flags & VM_READ))
- vcpu->arch.sie_block->gpsw.mask |= (1ul << 44);
- if (!(vma->vm_flags & VM_WRITE) && !(vma->vm_flags & VM_READ))
- vcpu->arch.sie_block->gpsw.mask |= (2ul << 44);
-
- up_read(&current->mm->mmap_sem);
- return 0;
+ ipte_lock(vcpu);
+ ret = guest_translate_address(vcpu, address1, &gpa, 1);
+ if (ret == PGM_PROTECTION) {
+ /* Write protected? Try again with read-only... */
+ cc = 1;
+ ret = guest_translate_address(vcpu, address1, &gpa, 0);
+ }
+ if (ret) {
+ if (ret == PGM_ADDRESSING || ret == PGM_TRANSLATION_SPEC) {
+ ret = kvm_s390_inject_program_int(vcpu, ret);
+ } else if (ret > 0) {
+ /* Translation not available */
+ kvm_s390_set_psw_cc(vcpu, 3);
+ ret = 0;
+ }
+ goto out_unlock;
+ }
-out_inject:
- up_read(&current->mm->mmap_sem);
- return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ hva = gfn_to_hva_prot(vcpu->kvm, gpa_to_gfn(gpa), &writable);
+ if (kvm_is_error_hva(hva)) {
+ ret = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
+ } else {
+ if (!writable)
+ cc = 1; /* Write not permitted ==> read-only */
+ kvm_s390_set_psw_cc(vcpu, cc);
+ /* Note: CC2 only occurs for storage keys (not supported yet) */
+ }
+out_unlock:
+ if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_DAT)
+ ipte_unlock(vcpu);
+ return ret;
}
int kvm_s390_handle_e5(struct kvm_vcpu *vcpu)
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
index 26caeb530a78..43079a48cc98 100644
--- a/arch/s390/kvm/sigp.c
+++ b/arch/s390/kvm/sigp.c
@@ -54,33 +54,23 @@ static int __sigp_sense(struct kvm_vcpu *vcpu, u16 cpu_addr,
static int __sigp_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
- struct kvm_s390_local_interrupt *li;
- struct kvm_s390_interrupt_info *inti;
+ struct kvm_s390_interrupt s390int = {
+ .type = KVM_S390_INT_EMERGENCY,
+ .parm = vcpu->vcpu_id,
+ };
struct kvm_vcpu *dst_vcpu = NULL;
+ int rc = 0;
if (cpu_addr < KVM_MAX_VCPUS)
dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
if (!dst_vcpu)
return SIGP_CC_NOT_OPERATIONAL;
- inti = kzalloc(sizeof(*inti), GFP_KERNEL);
- if (!inti)
- return -ENOMEM;
-
- inti->type = KVM_S390_INT_EMERGENCY;
- inti->emerg.code = vcpu->vcpu_id;
-
- li = &dst_vcpu->arch.local_int;
- spin_lock_bh(&li->lock);
- list_add_tail(&inti->list, &li->list);
- atomic_set(&li->active, 1);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- if (waitqueue_active(li->wq))
- wake_up_interruptible(li->wq);
- spin_unlock_bh(&li->lock);
- VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
+ rc = kvm_s390_inject_vcpu(dst_vcpu, &s390int);
+ if (!rc)
+ VCPU_EVENT(vcpu, 4, "sent sigp emerg to cpu %x", cpu_addr);
- return SIGP_CC_ORDER_CODE_ACCEPTED;
+ return rc ? rc : SIGP_CC_ORDER_CODE_ACCEPTED;
}
static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr,
@@ -116,33 +106,23 @@ static int __sigp_conditional_emergency(struct kvm_vcpu *vcpu, u16 cpu_addr,
static int __sigp_external_call(struct kvm_vcpu *vcpu, u16 cpu_addr)
{
- struct kvm_s390_local_interrupt *li;
- struct kvm_s390_interrupt_info *inti;
+ struct kvm_s390_interrupt s390int = {
+ .type = KVM_S390_INT_EXTERNAL_CALL,
+ .parm = vcpu->vcpu_id,
+ };
struct kvm_vcpu *dst_vcpu = NULL;
+ int rc;
if (cpu_addr < KVM_MAX_VCPUS)
dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
if (!dst_vcpu)
return SIGP_CC_NOT_OPERATIONAL;
- inti = kzalloc(sizeof(*inti), GFP_KERNEL);
- if (!inti)
- return -ENOMEM;
+ rc = kvm_s390_inject_vcpu(dst_vcpu, &s390int);
+ if (!rc)
+ VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
- inti->type = KVM_S390_INT_EXTERNAL_CALL;
- inti->extcall.code = vcpu->vcpu_id;
-
- li = &dst_vcpu->arch.local_int;
- spin_lock_bh(&li->lock);
- list_add_tail(&inti->list, &li->list);
- atomic_set(&li->active, 1);
- atomic_set_mask(CPUSTAT_EXT_INT, li->cpuflags);
- if (waitqueue_active(li->wq))
- wake_up_interruptible(li->wq);
- spin_unlock_bh(&li->lock);
- VCPU_EVENT(vcpu, 4, "sent sigp ext call to cpu %x", cpu_addr);
-
- return SIGP_CC_ORDER_CODE_ACCEPTED;
+ return rc ? rc : SIGP_CC_ORDER_CODE_ACCEPTED;
}
static int __inject_sigp_stop(struct kvm_s390_local_interrupt *li, int action)
@@ -235,7 +215,6 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
struct kvm_vcpu *dst_vcpu = NULL;
struct kvm_s390_interrupt_info *inti;
int rc;
- u8 tmp;
if (cpu_addr < KVM_MAX_VCPUS)
dst_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
@@ -243,10 +222,13 @@ static int __sigp_set_prefix(struct kvm_vcpu *vcpu, u16 cpu_addr, u32 address,
return SIGP_CC_NOT_OPERATIONAL;
li = &dst_vcpu->arch.local_int;
- /* make sure that the new value is valid memory */
- address = address & 0x7fffe000u;
- if (copy_from_guest_absolute(vcpu, &tmp, address, 1) ||
- copy_from_guest_absolute(vcpu, &tmp, address + PAGE_SIZE, 1)) {
+ /*
+ * Make sure the new value is valid memory. We only need to check the
+ * first page, since address is 8k aligned and memory pieces are always
+ * at least 1MB aligned and have at least a size of 1MB.
+ */
+ address &= 0x7fffe000u;
+ if (kvm_is_error_gpa(vcpu->kvm, address)) {
*reg &= 0xffffffff00000000UL;
*reg |= SIGP_STATUS_INVALID_PARAMETER;
return SIGP_CC_STATUS_STORED;
@@ -456,3 +438,38 @@ int kvm_s390_handle_sigp(struct kvm_vcpu *vcpu)
kvm_s390_set_psw_cc(vcpu, rc);
return 0;
}
+
+/*
+ * Handle SIGP partial execution interception.
+ *
+ * This interception will occur at the source cpu when a source cpu sends an
+ * external call to a target cpu and the target cpu has the WAIT bit set in
+ * its cpuflags. Interception will occurr after the interrupt indicator bits at
+ * the target cpu have been set. All error cases will lead to instruction
+ * interception, therefore nothing is to be checked or prepared.
+ */
+int kvm_s390_handle_sigp_pei(struct kvm_vcpu *vcpu)
+{
+ int r3 = vcpu->arch.sie_block->ipa & 0x000f;
+ u16 cpu_addr = vcpu->run->s.regs.gprs[r3];
+ struct kvm_vcpu *dest_vcpu;
+ u8 order_code = kvm_s390_get_base_disp_rs(vcpu);
+
+ trace_kvm_s390_handle_sigp_pei(vcpu, order_code, cpu_addr);
+
+ if (order_code == SIGP_EXTERNAL_CALL) {
+ dest_vcpu = kvm_get_vcpu(vcpu->kvm, cpu_addr);
+ BUG_ON(dest_vcpu == NULL);
+
+ spin_lock_bh(&dest_vcpu->arch.local_int.lock);
+ if (waitqueue_active(&dest_vcpu->wq))
+ wake_up_interruptible(&dest_vcpu->wq);
+ dest_vcpu->preempted = true;
+ spin_unlock_bh(&dest_vcpu->arch.local_int.lock);
+
+ kvm_s390_set_psw_cc(vcpu, SIGP_CC_ORDER_CODE_ACCEPTED);
+ return 0;
+ }
+
+ return -EOPNOTSUPP;
+}
diff --git a/arch/s390/kvm/trace-s390.h b/arch/s390/kvm/trace-s390.h
index 13f30f58a2df..647e9d6a4818 100644
--- a/arch/s390/kvm/trace-s390.h
+++ b/arch/s390/kvm/trace-s390.h
@@ -68,6 +68,27 @@ TRACE_EVENT(kvm_s390_destroy_vcpu,
);
/*
+ * Trace point for start and stop of vpcus.
+ */
+TRACE_EVENT(kvm_s390_vcpu_start_stop,
+ TP_PROTO(unsigned int id, int state),
+ TP_ARGS(id, state),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, id)
+ __field(int, state)
+ ),
+
+ TP_fast_assign(
+ __entry->id = id;
+ __entry->state = state;
+ ),
+
+ TP_printk("%s cpu %d", __entry->state ? "starting" : "stopping",
+ __entry->id)
+ );
+
+/*
* Trace points for injection of interrupts, either per machine or
* per vcpu.
*/
@@ -223,6 +244,28 @@ TRACE_EVENT(kvm_s390_enable_css,
__entry->kvm)
);
+/*
+ * Trace point for enabling and disabling interlocking-and-broadcasting
+ * suppression.
+ */
+TRACE_EVENT(kvm_s390_enable_disable_ibs,
+ TP_PROTO(unsigned int id, int state),
+ TP_ARGS(id, state),
+
+ TP_STRUCT__entry(
+ __field(unsigned int, id)
+ __field(int, state)
+ ),
+
+ TP_fast_assign(
+ __entry->id = id;
+ __entry->state = state;
+ ),
+
+ TP_printk("%s ibs on cpu %d",
+ __entry->state ? "enabling" : "disabling", __entry->id)
+ );
+
#endif /* _TRACE_KVMS390_H */
diff --git a/arch/s390/kvm/trace.h b/arch/s390/kvm/trace.h
index e8e7213d4cc5..916834d7a73a 100644
--- a/arch/s390/kvm/trace.h
+++ b/arch/s390/kvm/trace.h
@@ -2,7 +2,7 @@
#define _TRACE_KVM_H
#include <linux/tracepoint.h>
-#include <asm/sigp.h>
+#include <asm/sie.h>
#include <asm/debug.h>
#include <asm/dis.h>
@@ -30,6 +30,20 @@
TP_printk("%02d[%016lx-%016lx]: " p_str, __entry->id, \
__entry->pswmask, __entry->pswaddr, p_args)
+TRACE_EVENT(kvm_s390_skey_related_inst,
+ TP_PROTO(VCPU_PROTO_COMMON),
+ TP_ARGS(VCPU_ARGS_COMMON),
+
+ TP_STRUCT__entry(
+ VCPU_FIELD_COMMON
+ ),
+
+ TP_fast_assign(
+ VCPU_ASSIGN_COMMON
+ ),
+ VCPU_TP_PRINTK("%s", "first instruction related to skeys on vcpu")
+ );
+
TRACE_EVENT(kvm_s390_major_guest_pfault,
TP_PROTO(VCPU_PROTO_COMMON),
TP_ARGS(VCPU_ARGS_COMMON),
@@ -111,17 +125,6 @@ TRACE_EVENT(kvm_s390_sie_fault,
VCPU_TP_PRINTK("%s", "fault in sie instruction")
);
-#define sie_intercept_code \
- {0x04, "Instruction"}, \
- {0x08, "Program interruption"}, \
- {0x0C, "Instruction and program interruption"}, \
- {0x10, "External request"}, \
- {0x14, "External interruption"}, \
- {0x18, "I/O request"}, \
- {0x1C, "Wait state"}, \
- {0x20, "Validity"}, \
- {0x28, "Stop request"}
-
TRACE_EVENT(kvm_s390_sie_exit,
TP_PROTO(VCPU_PROTO_COMMON, u8 icptcode),
TP_ARGS(VCPU_ARGS_COMMON, icptcode),
@@ -151,7 +154,6 @@ TRACE_EVENT(kvm_s390_intercept_instruction,
TP_STRUCT__entry(
VCPU_FIELD_COMMON
__field(__u64, instruction)
- __field(char, insn[8])
),
TP_fast_assign(
@@ -162,10 +164,8 @@ TRACE_EVENT(kvm_s390_intercept_instruction,
VCPU_TP_PRINTK("intercepted instruction %016llx (%s)",
__entry->instruction,
- insn_to_mnemonic((unsigned char *)
- &__entry->instruction,
- __entry->insn, sizeof(__entry->insn)) ?
- "unknown" : __entry->insn)
+ __print_symbolic(icpt_insn_decoder(__entry->instruction),
+ icpt_insn_codes))
);
/*
@@ -213,18 +213,6 @@ TRACE_EVENT(kvm_s390_intercept_validity,
* Trace points for instructions that are of special interest.
*/
-#define sigp_order_codes \
- {SIGP_SENSE, "sense"}, \
- {SIGP_EXTERNAL_CALL, "external call"}, \
- {SIGP_EMERGENCY_SIGNAL, "emergency signal"}, \
- {SIGP_STOP, "stop"}, \
- {SIGP_STOP_AND_STORE_STATUS, "stop and store status"}, \
- {SIGP_SET_ARCHITECTURE, "set architecture"}, \
- {SIGP_SET_PREFIX, "set prefix"}, \
- {SIGP_STORE_STATUS_AT_ADDRESS, "store status at addr"}, \
- {SIGP_SENSE_RUNNING, "sense running"}, \
- {SIGP_RESTART, "restart"}
-
TRACE_EVENT(kvm_s390_handle_sigp,
TP_PROTO(VCPU_PROTO_COMMON, __u8 order_code, __u16 cpu_addr, \
__u32 parameter),
@@ -251,12 +239,28 @@ TRACE_EVENT(kvm_s390_handle_sigp,
__entry->cpu_addr, __entry->parameter)
);
-#define diagnose_codes \
- {0x10, "release pages"}, \
- {0x44, "time slice end"}, \
- {0x308, "ipl functions"}, \
- {0x500, "kvm hypercall"}, \
- {0x501, "kvm breakpoint"}
+TRACE_EVENT(kvm_s390_handle_sigp_pei,
+ TP_PROTO(VCPU_PROTO_COMMON, __u8 order_code, __u16 cpu_addr),
+ TP_ARGS(VCPU_ARGS_COMMON, order_code, cpu_addr),
+
+ TP_STRUCT__entry(
+ VCPU_FIELD_COMMON
+ __field(__u8, order_code)
+ __field(__u16, cpu_addr)
+ ),
+
+ TP_fast_assign(
+ VCPU_ASSIGN_COMMON
+ __entry->order_code = order_code;
+ __entry->cpu_addr = cpu_addr;
+ ),
+
+ VCPU_TP_PRINTK("handle sigp pei order %02x (%s), cpu address %04x",
+ __entry->order_code,
+ __print_symbolic(__entry->order_code,
+ sigp_order_codes),
+ __entry->cpu_addr)
+ );
TRACE_EVENT(kvm_s390_handle_diag,
TP_PROTO(VCPU_PROTO_COMMON, __u16 code),
@@ -301,6 +305,31 @@ TRACE_EVENT(kvm_s390_handle_lctl,
__entry->reg1, __entry->reg3, __entry->addr)
);
+TRACE_EVENT(kvm_s390_handle_stctl,
+ TP_PROTO(VCPU_PROTO_COMMON, int g, int reg1, int reg3, u64 addr),
+ TP_ARGS(VCPU_ARGS_COMMON, g, reg1, reg3, addr),
+
+ TP_STRUCT__entry(
+ VCPU_FIELD_COMMON
+ __field(int, g)
+ __field(int, reg1)
+ __field(int, reg3)
+ __field(u64, addr)
+ ),
+
+ TP_fast_assign(
+ VCPU_ASSIGN_COMMON
+ __entry->g = g;
+ __entry->reg1 = reg1;
+ __entry->reg3 = reg3;
+ __entry->addr = addr;
+ ),
+
+ VCPU_TP_PRINTK("%s: storing cr %x-%x to %016llx",
+ __entry->g ? "stctg" : "stctl",
+ __entry->reg1, __entry->reg3, __entry->addr)
+ );
+
TRACE_EVENT(kvm_s390_handle_prefix,
TP_PROTO(VCPU_PROTO_COMMON, int set, u32 address),
TP_ARGS(VCPU_ARGS_COMMON, set, address),
generated by cgit (git 2.34.1) at 2024-07-06 17:23:37 +0000