summaryrefslogtreecommitdiff
path: root/arch/powerpc/kvm
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/Kconfig9
-rw-r--r--arch/powerpc/kvm/book3s_32_sr.S26
-rw-r--r--arch/powerpc/kvm/book3s_64_entry.S10
-rw-r--r--arch/powerpc/kvm/book3s_64_mmu_radix.c9
-rw-r--r--arch/powerpc/kvm/book3s_64_vio.c45
-rw-r--r--arch/powerpc/kvm/book3s_64_vio_hv.c44
-rw-r--r--arch/powerpc/kvm/book3s_hv.c41
-rw-r--r--arch/powerpc/kvm/book3s_hv_nested.c16
-rw-r--r--arch/powerpc/kvm/book3s_pr.c26
-rw-r--r--arch/powerpc/kvm/book3s_pr_papr.c20
-rw-r--r--arch/powerpc/kvm/book3s_rtas.c4
-rw-r--r--arch/powerpc/kvm/powerpc.c21
12 files changed, 187 insertions, 84 deletions
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 18e58085447c..ddd88179110a 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -112,12 +112,21 @@ config KVM_BOOK3S_64_PR
guest in user mode (problem state) and emulating all
privileged instructions and registers.
+ This is only available for hash MMU mode and only supports
+ guests that use hash MMU mode.
+
This is not as fast as using hypervisor mode, but works on
machines where hypervisor mode is not available or not usable,
and can emulate processors that are different from the host
processor, including emulating 32-bit processors on a 64-bit
host.
+ Selecting this option will cause the SCV facility to be
+ disabled when the kernel is booted on the pseries platform in
+ hash MMU mode (regardless of PR VMs running). When any PR VMs
+ are running, "AIL" mode is disabled which may slow interrupts
+ and system calls on the host.
+
config KVM_BOOK3S_HV_EXIT_TIMING
bool "Detailed timing for hypervisor real-mode code"
depends on KVM_BOOK3S_HV_POSSIBLE && DEBUG_FS
diff --git a/arch/powerpc/kvm/book3s_32_sr.S b/arch/powerpc/kvm/book3s_32_sr.S
index e3ab9df6cf19..6cfcd20d4668 100644
--- a/arch/powerpc/kvm/book3s_32_sr.S
+++ b/arch/powerpc/kvm/book3s_32_sr.S
@@ -122,11 +122,27 @@
/* 0x0 - 0xb */
- /* 'current->mm' needs to be in r4 */
- tophys(r4, r2)
- lwz r4, MM(r4)
- tophys(r4, r4)
- /* This only clobbers r0, r3, r4 and r5 */
+ /* switch_mmu_context() needs paging, let's enable it */
+ mfmsr r9
+ ori r11, r9, MSR_DR
+ mtmsr r11
+ sync
+
+ /* switch_mmu_context() clobbers r12, rescue it */
+ SAVE_GPR(12, r1)
+
+ /* Calling switch_mmu_context(<inv>, current->mm, <inv>); */
+ lwz r4, MM(r2)
bl switch_mmu_context
+ /* restore r12 */
+ REST_GPR(12, r1)
+
+ /* Disable paging again */
+ mfmsr r9
+ li r6, MSR_DR
+ andc r9, r9, r6
+ mtmsr r9
+ sync
+
.endm
diff --git a/arch/powerpc/kvm/book3s_64_entry.S b/arch/powerpc/kvm/book3s_64_entry.S
index 05e003eb5d90..e42d1c609e47 100644
--- a/arch/powerpc/kvm/book3s_64_entry.S
+++ b/arch/powerpc/kvm/book3s_64_entry.S
@@ -414,10 +414,16 @@ END_FTR_SECTION_IFSET(CPU_FTR_DAWR1)
*/
ld r10,HSTATE_SCRATCH0(r13)
cmpwi r10,BOOK3S_INTERRUPT_MACHINE_CHECK
- beq machine_check_common
+ beq .Lcall_machine_check_common
cmpwi r10,BOOK3S_INTERRUPT_SYSTEM_RESET
- beq system_reset_common
+ beq .Lcall_system_reset_common
b .
+
+.Lcall_machine_check_common:
+ b machine_check_common
+
+.Lcall_system_reset_common:
+ b system_reset_common
#endif
diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c
index e4ce2a35483f..42851c32ff3b 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_radix.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c
@@ -168,9 +168,10 @@ int kvmppc_mmu_walk_radix_tree(struct kvm_vcpu *vcpu, gva_t eaddr,
return -EINVAL;
/* Read the entry from guest memory */
addr = base + (index * sizeof(rpte));
- vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
+
+ kvm_vcpu_srcu_read_lock(vcpu);
ret = kvm_read_guest(kvm, addr, &rpte, sizeof(rpte));
- srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (ret) {
if (pte_ret_p)
*pte_ret_p = addr;
@@ -246,9 +247,9 @@ int kvmppc_mmu_radix_translate_table(struct kvm_vcpu *vcpu, gva_t eaddr,
/* Read the table to find the root of the radix tree */
ptbl = (table & PRTB_MASK) + (table_index * sizeof(entry));
- vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
ret = kvm_read_guest(kvm, ptbl, &entry, sizeof(entry));
- srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (ret)
return ret;
diff --git a/arch/powerpc/kvm/book3s_64_vio.c b/arch/powerpc/kvm/book3s_64_vio.c
index d42b4b6d4a79..85cfa6328222 100644
--- a/arch/powerpc/kvm/book3s_64_vio.c
+++ b/arch/powerpc/kvm/book3s_64_vio.c
@@ -420,13 +420,19 @@ static void kvmppc_tce_put(struct kvmppc_spapr_tce_table *stt,
tbl[idx % TCES_PER_PAGE] = tce;
}
-static void kvmppc_clear_tce(struct mm_struct *mm, struct iommu_table *tbl,
- unsigned long entry)
+static void kvmppc_clear_tce(struct mm_struct *mm, struct kvmppc_spapr_tce_table *stt,
+ struct iommu_table *tbl, unsigned long entry)
{
- unsigned long hpa = 0;
- enum dma_data_direction dir = DMA_NONE;
+ unsigned long i;
+ unsigned long subpages = 1ULL << (stt->page_shift - tbl->it_page_shift);
+ unsigned long io_entry = entry << (stt->page_shift - tbl->it_page_shift);
+
+ for (i = 0; i < subpages; ++i) {
+ unsigned long hpa = 0;
+ enum dma_data_direction dir = DMA_NONE;
- iommu_tce_xchg_no_kill(mm, tbl, entry, &hpa, &dir);
+ iommu_tce_xchg_no_kill(mm, tbl, io_entry + i, &hpa, &dir);
+ }
}
static long kvmppc_tce_iommu_mapped_dec(struct kvm *kvm,
@@ -485,6 +491,8 @@ static long kvmppc_tce_iommu_unmap(struct kvm *kvm,
break;
}
+ iommu_tce_kill(tbl, io_entry, subpages);
+
return ret;
}
@@ -544,6 +552,8 @@ static long kvmppc_tce_iommu_map(struct kvm *kvm,
break;
}
+ iommu_tce_kill(tbl, io_entry, subpages);
+
return ret;
}
@@ -590,10 +600,9 @@ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
ret = kvmppc_tce_iommu_map(vcpu->kvm, stt, stit->tbl,
entry, ua, dir);
- iommu_tce_kill(stit->tbl, entry, 1);
if (ret != H_SUCCESS) {
- kvmppc_clear_tce(vcpu->kvm->mm, stit->tbl, entry);
+ kvmppc_clear_tce(vcpu->kvm->mm, stt, stit->tbl, entry);
goto unlock_exit;
}
}
@@ -669,13 +678,13 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
*/
if (get_user(tce, tces + i)) {
ret = H_TOO_HARD;
- goto invalidate_exit;
+ goto unlock_exit;
}
tce = be64_to_cpu(tce);
if (kvmppc_tce_to_ua(vcpu->kvm, tce, &ua)) {
ret = H_PARAMETER;
- goto invalidate_exit;
+ goto unlock_exit;
}
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) {
@@ -684,19 +693,15 @@ long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
iommu_tce_direction(tce));
if (ret != H_SUCCESS) {
- kvmppc_clear_tce(vcpu->kvm->mm, stit->tbl,
- entry);
- goto invalidate_exit;
+ kvmppc_clear_tce(vcpu->kvm->mm, stt, stit->tbl,
+ entry + i);
+ goto unlock_exit;
}
}
kvmppc_tce_put(stt, entry + i, tce);
}
-invalidate_exit:
- list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
- iommu_tce_kill(stit->tbl, entry, npages);
-
unlock_exit:
srcu_read_unlock(&vcpu->kvm->srcu, idx);
@@ -735,20 +740,16 @@ long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
continue;
if (ret == H_TOO_HARD)
- goto invalidate_exit;
+ return ret;
WARN_ON_ONCE(1);
- kvmppc_clear_tce(vcpu->kvm->mm, stit->tbl, entry);
+ kvmppc_clear_tce(vcpu->kvm->mm, stt, stit->tbl, entry + i);
}
}
for (i = 0; i < npages; ++i, ioba += (1ULL << stt->page_shift))
kvmppc_tce_put(stt, ioba >> stt->page_shift, tce_value);
-invalidate_exit:
- list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
- iommu_tce_kill(stit->tbl, ioba >> stt->page_shift, npages);
-
return ret;
}
EXPORT_SYMBOL_GPL(kvmppc_h_stuff_tce);
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c
index 870b7f0c7ea5..fdeda6a9cff4 100644
--- a/arch/powerpc/kvm/book3s_64_vio_hv.c
+++ b/arch/powerpc/kvm/book3s_64_vio_hv.c
@@ -247,13 +247,19 @@ static void iommu_tce_kill_rm(struct iommu_table *tbl,
tbl->it_ops->tce_kill(tbl, entry, pages, true);
}
-static void kvmppc_rm_clear_tce(struct kvm *kvm, struct iommu_table *tbl,
- unsigned long entry)
+static void kvmppc_rm_clear_tce(struct kvm *kvm, struct kvmppc_spapr_tce_table *stt,
+ struct iommu_table *tbl, unsigned long entry)
{
- unsigned long hpa = 0;
- enum dma_data_direction dir = DMA_NONE;
+ unsigned long i;
+ unsigned long subpages = 1ULL << (stt->page_shift - tbl->it_page_shift);
+ unsigned long io_entry = entry << (stt->page_shift - tbl->it_page_shift);
+
+ for (i = 0; i < subpages; ++i) {
+ unsigned long hpa = 0;
+ enum dma_data_direction dir = DMA_NONE;
- iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, entry, &hpa, &dir);
+ iommu_tce_xchg_no_kill_rm(kvm->mm, tbl, io_entry + i, &hpa, &dir);
+ }
}
static long kvmppc_rm_tce_iommu_mapped_dec(struct kvm *kvm,
@@ -316,6 +322,8 @@ static long kvmppc_rm_tce_iommu_unmap(struct kvm *kvm,
break;
}
+ iommu_tce_kill_rm(tbl, io_entry, subpages);
+
return ret;
}
@@ -379,6 +387,8 @@ static long kvmppc_rm_tce_iommu_map(struct kvm *kvm,
break;
}
+ iommu_tce_kill_rm(tbl, io_entry, subpages);
+
return ret;
}
@@ -420,10 +430,8 @@ long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt,
stit->tbl, entry, ua, dir);
- iommu_tce_kill_rm(stit->tbl, entry, 1);
-
if (ret != H_SUCCESS) {
- kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, entry);
+ kvmppc_rm_clear_tce(vcpu->kvm, stt, stit->tbl, entry);
return ret;
}
}
@@ -561,7 +569,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
ua = 0;
if (kvmppc_rm_tce_to_ua(vcpu->kvm, tce, &ua)) {
ret = H_PARAMETER;
- goto invalidate_exit;
+ goto unlock_exit;
}
list_for_each_entry_lockless(stit, &stt->iommu_tables, next) {
@@ -570,19 +578,15 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
iommu_tce_direction(tce));
if (ret != H_SUCCESS) {
- kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl,
- entry);
- goto invalidate_exit;
+ kvmppc_rm_clear_tce(vcpu->kvm, stt, stit->tbl,
+ entry + i);
+ goto unlock_exit;
}
}
kvmppc_rm_tce_put(stt, entry + i, tce);
}
-invalidate_exit:
- list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
- iommu_tce_kill_rm(stit->tbl, entry, npages);
-
unlock_exit:
if (!prereg)
arch_spin_unlock(&kvm->mmu_lock.rlock.raw_lock);
@@ -620,20 +624,16 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
continue;
if (ret == H_TOO_HARD)
- goto invalidate_exit;
+ return ret;
WARN_ON_ONCE_RM(1);
- kvmppc_rm_clear_tce(vcpu->kvm, stit->tbl, entry);
+ kvmppc_rm_clear_tce(vcpu->kvm, stt, stit->tbl, entry + i);
}
}
for (i = 0; i < npages; ++i, ioba += (1ULL << stt->page_shift))
kvmppc_rm_tce_put(stt, ioba >> stt->page_shift, tce_value);
-invalidate_exit:
- list_for_each_entry_lockless(stit, &stt->iommu_tables, next)
- iommu_tce_kill_rm(stit->tbl, ioba >> stt->page_shift, npages);
-
return ret;
}
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index c886557638a1..6fa518f6501d 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -225,6 +225,13 @@ static void kvmppc_fast_vcpu_kick_hv(struct kvm_vcpu *vcpu)
int cpu;
struct rcuwait *waitp;
+ /*
+ * rcuwait_wake_up contains smp_mb() which orders prior stores that
+ * create pending work vs below loads of cpu fields. The other side
+ * is the barrier in vcpu run that orders setting the cpu fields vs
+ * testing for pending work.
+ */
+
waitp = kvm_arch_vcpu_get_wait(vcpu);
if (rcuwait_wake_up(waitp))
++vcpu->stat.generic.halt_wakeup;
@@ -1089,7 +1096,7 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
break;
}
tvcpu->arch.prodded = 1;
- smp_mb();
+ smp_mb(); /* This orders prodded store vs ceded load */
if (tvcpu->arch.ceded)
kvmppc_fast_vcpu_kick_hv(tvcpu);
break;
@@ -3766,6 +3773,14 @@ static noinline void kvmppc_run_core(struct kvmppc_vcore *vc)
pvc = core_info.vc[sub];
pvc->pcpu = pcpu + thr;
for_each_runnable_thread(i, vcpu, pvc) {
+ /*
+ * XXX: is kvmppc_start_thread called too late here?
+ * It updates vcpu->cpu and vcpu->arch.thread_cpu
+ * which are used by kvmppc_fast_vcpu_kick_hv(), but
+ * kick is called after new exceptions become available
+ * and exceptions are checked earlier than here, by
+ * kvmppc_core_prepare_to_enter.
+ */
kvmppc_start_thread(vcpu, pvc);
kvmppc_create_dtl_entry(vcpu, pvc);
trace_kvm_guest_enter(vcpu);
@@ -4487,6 +4502,21 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
if (need_resched() || !kvm->arch.mmu_ready)
goto out;
+ vcpu->cpu = pcpu;
+ vcpu->arch.thread_cpu = pcpu;
+ vc->pcpu = pcpu;
+ local_paca->kvm_hstate.kvm_vcpu = vcpu;
+ local_paca->kvm_hstate.ptid = 0;
+ local_paca->kvm_hstate.fake_suspend = 0;
+
+ /*
+ * Orders set cpu/thread_cpu vs testing for pending interrupts and
+ * doorbells below. The other side is when these fields are set vs
+ * kvmppc_fast_vcpu_kick_hv reading the cpu/thread_cpu fields to
+ * kick a vCPU to notice the pending interrupt.
+ */
+ smp_mb();
+
if (!nested) {
kvmppc_core_prepare_to_enter(vcpu);
if (test_bit(BOOK3S_IRQPRIO_EXTERNAL,
@@ -4506,13 +4536,6 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
tb = mftb();
- vcpu->cpu = pcpu;
- vcpu->arch.thread_cpu = pcpu;
- vc->pcpu = pcpu;
- local_paca->kvm_hstate.kvm_vcpu = vcpu;
- local_paca->kvm_hstate.ptid = 0;
- local_paca->kvm_hstate.fake_suspend = 0;
-
__kvmppc_create_dtl_entry(vcpu, pcpu, tb + vc->tb_offset, 0);
trace_kvm_guest_enter(vcpu);
@@ -4614,6 +4637,8 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
run->exit_reason = KVM_EXIT_INTR;
vcpu->arch.ret = -EINTR;
out:
+ vcpu->cpu = -1;
+ vcpu->arch.thread_cpu = -1;
powerpc_local_irq_pmu_restore(flags);
preempt_enable();
goto done;
diff --git a/arch/powerpc/kvm/book3s_hv_nested.c b/arch/powerpc/kvm/book3s_hv_nested.c
index 9d373f8963ee..c943a051c6e7 100644
--- a/arch/powerpc/kvm/book3s_hv_nested.c
+++ b/arch/powerpc/kvm/book3s_hv_nested.c
@@ -306,10 +306,10 @@ long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu)
/* copy parameters in */
hv_ptr = kvmppc_get_gpr(vcpu, 4);
regs_ptr = kvmppc_get_gpr(vcpu, 5);
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
err = kvmhv_read_guest_state_and_regs(vcpu, &l2_hv, &l2_regs,
hv_ptr, regs_ptr);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (err)
return H_PARAMETER;
@@ -410,10 +410,10 @@ long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu)
byteswap_hv_regs(&l2_hv);
byteswap_pt_regs(&l2_regs);
}
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
err = kvmhv_write_guest_state_and_regs(vcpu, &l2_hv, &l2_regs,
hv_ptr, regs_ptr);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (err)
return H_AUTHORITY;
@@ -600,16 +600,16 @@ long kvmhv_copy_tofrom_guest_nested(struct kvm_vcpu *vcpu)
goto not_found;
/* Write what was loaded into our buffer back to the L1 guest */
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
rc = kvm_vcpu_write_guest(vcpu, gp_to, buf, n);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (rc)
goto not_found;
} else {
/* Load the data to be stored from the L1 guest into our buf */
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
rc = kvm_vcpu_read_guest(vcpu, gp_from, buf, n);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (rc)
goto not_found;
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c
index 34a801c3604a..7bf9e6ca5c2d 100644
--- a/arch/powerpc/kvm/book3s_pr.c
+++ b/arch/powerpc/kvm/book3s_pr.c
@@ -137,12 +137,15 @@ static void kvmppc_core_vcpu_load_pr(struct kvm_vcpu *vcpu, int cpu)
svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
svcpu->in_use = 0;
svcpu_put(svcpu);
-#endif
/* Disable AIL if supported */
- if (cpu_has_feature(CPU_FTR_HVMODE) &&
- cpu_has_feature(CPU_FTR_ARCH_207S))
- mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) & ~LPCR_AIL);
+ if (cpu_has_feature(CPU_FTR_HVMODE)) {
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) & ~LPCR_AIL);
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && (current->thread.fscr & FSCR_SCV))
+ mtspr(SPRN_FSCR, mfspr(SPRN_FSCR) & ~FSCR_SCV);
+ }
+#endif
vcpu->cpu = smp_processor_id();
#ifdef CONFIG_PPC_BOOK3S_32
@@ -165,6 +168,14 @@ static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
svcpu_put(svcpu);
+
+ /* Enable AIL if supported */
+ if (cpu_has_feature(CPU_FTR_HVMODE)) {
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) | LPCR_AIL_3);
+ if (cpu_has_feature(CPU_FTR_ARCH_300) && (current->thread.fscr & FSCR_SCV))
+ mtspr(SPRN_FSCR, mfspr(SPRN_FSCR) | FSCR_SCV);
+ }
#endif
if (kvmppc_is_split_real(vcpu))
@@ -174,11 +185,6 @@ static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
kvmppc_save_tm_pr(vcpu);
- /* Enable AIL if supported */
- if (cpu_has_feature(CPU_FTR_HVMODE) &&
- cpu_has_feature(CPU_FTR_ARCH_207S))
- mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) | LPCR_AIL_3);
-
vcpu->cpu = -1;
}
@@ -1037,6 +1043,8 @@ static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
{
+ if (fscr & FSCR_SCV)
+ fscr &= ~FSCR_SCV; /* SCV must not be enabled */
if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
/* TAR got dropped, drop it in shadow too */
kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
diff --git a/arch/powerpc/kvm/book3s_pr_papr.c b/arch/powerpc/kvm/book3s_pr_papr.c
index 1f10e7dfcdd0..dc4f51ac84bc 100644
--- a/arch/powerpc/kvm/book3s_pr_papr.c
+++ b/arch/powerpc/kvm/book3s_pr_papr.c
@@ -281,6 +281,22 @@ static int kvmppc_h_pr_logical_ci_store(struct kvm_vcpu *vcpu)
return EMULATE_DONE;
}
+static int kvmppc_h_pr_set_mode(struct kvm_vcpu *vcpu)
+{
+ unsigned long mflags = kvmppc_get_gpr(vcpu, 4);
+ unsigned long resource = kvmppc_get_gpr(vcpu, 5);
+
+ if (resource == H_SET_MODE_RESOURCE_ADDR_TRANS_MODE) {
+ /* KVM PR does not provide AIL!=0 to guests */
+ if (mflags == 0)
+ kvmppc_set_gpr(vcpu, 3, H_SUCCESS);
+ else
+ kvmppc_set_gpr(vcpu, 3, H_UNSUPPORTED_FLAG_START - 63);
+ return EMULATE_DONE;
+ }
+ return EMULATE_FAIL;
+}
+
#ifdef CONFIG_SPAPR_TCE_IOMMU
static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
{
@@ -384,6 +400,8 @@ int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
return kvmppc_h_pr_logical_ci_load(vcpu);
case H_LOGICAL_CI_STORE:
return kvmppc_h_pr_logical_ci_store(vcpu);
+ case H_SET_MODE:
+ return kvmppc_h_pr_set_mode(vcpu);
case H_XIRR:
case H_CPPR:
case H_EOI:
@@ -421,6 +439,7 @@ int kvmppc_hcall_impl_pr(unsigned long cmd)
case H_CEDE:
case H_LOGICAL_CI_LOAD:
case H_LOGICAL_CI_STORE:
+ case H_SET_MODE:
#ifdef CONFIG_KVM_XICS
case H_XIRR:
case H_CPPR:
@@ -447,6 +466,7 @@ static unsigned int default_hcall_list[] = {
H_BULK_REMOVE,
H_PUT_TCE,
H_CEDE,
+ H_SET_MODE,
#ifdef CONFIG_KVM_XICS
H_XIRR,
H_CPPR,
diff --git a/arch/powerpc/kvm/book3s_rtas.c b/arch/powerpc/kvm/book3s_rtas.c
index 0f847f1e5ddd..6808bda0dbc1 100644
--- a/arch/powerpc/kvm/book3s_rtas.c
+++ b/arch/powerpc/kvm/book3s_rtas.c
@@ -229,9 +229,9 @@ int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
*/
args_phys = kvmppc_get_gpr(vcpu, 4) & KVM_PAM;
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
rc = kvm_read_guest(vcpu->kvm, args_phys, &args, sizeof(args));
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (rc)
goto fail;
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index 9772b176e406..533c4232e5ab 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -425,9 +425,9 @@ int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
return EMULATE_DONE;
}
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
rc = kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (rc)
return EMULATE_DO_MMIO;
@@ -705,6 +705,23 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
r = 1;
break;
#endif
+ case KVM_CAP_PPC_AIL_MODE_3:
+ r = 0;
+ /*
+ * KVM PR, POWER7, and some POWER9s don't support AIL=3 mode.
+ * The POWER9s can support it if the guest runs in hash mode,
+ * but QEMU doesn't necessarily query the capability in time.
+ */
+ if (hv_enabled) {
+ if (kvmhv_on_pseries()) {
+ if (pseries_reloc_on_exception())
+ r = 1;
+ } else if (cpu_has_feature(CPU_FTR_ARCH_207S) &&
+ !cpu_has_feature(CPU_FTR_P9_RADIX_PREFETCH_BUG)) {
+ r = 1;
+ }
+ }
+ break;
default:
r = 0;
break;
generated by cgit (git 2.34.1) at 2024-05-25 07:54:30 +0000