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Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S295
1 files changed, 127 insertions, 168 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 8dd437d7a2c6..83f7504349d2 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -10,6 +10,9 @@
* Authors: Alexander Graf <agraf@suse.de>
*/
+#include <linux/export.h>
+#include <linux/linkage.h>
+#include <linux/objtool.h>
#include <asm/ppc_asm.h>
#include <asm/code-patching-asm.h>
#include <asm/kvm_asm.h>
@@ -22,7 +25,6 @@
#include <asm/exception-64s.h>
#include <asm/kvm_book3s_asm.h>
#include <asm/book3s/64/mmu-hash.h>
-#include <asm/export.h>
#include <asm/tm.h>
#include <asm/opal.h>
#include <asm/thread_info.h>
@@ -51,6 +53,14 @@
#define STACK_SLOT_FSCR (SFS-96)
/*
+ * Use the last LPID (all implemented LPID bits = 1) for partition switching.
+ * This is reserved in the LPID allocator. POWER7 only implements 0x3ff, but
+ * we write 0xfff into the LPID SPR anyway, which seems to work and just
+ * ignores the top bits.
+ */
+#define LPID_RSVD 0xfff
+
+/*
* Call kvmppc_hv_entry in real mode.
* Must be called with interrupts hard-disabled.
*
@@ -229,14 +239,14 @@ kvm_novcpu_wakeup:
cmpdi r4, 0
beq kvmppc_primary_no_guest
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
addi r3, r4, VCPU_TB_RMENTRY
bl kvmhv_start_timing
#endif
b kvmppc_got_guest
kvm_novcpu_exit:
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
ld r4, HSTATE_KVM_VCPU(r13)
cmpdi r4, 0
beq 13f
@@ -255,13 +265,16 @@ kvm_novcpu_exit:
* r3 contains the SRR1 wakeup value, SRR1 is trashed.
*/
_GLOBAL(idle_kvm_start_guest)
- ld r4,PACAEMERGSP(r13)
mfcr r5
mflr r0
- std r1,0(r4)
- std r5,8(r4)
- std r0,16(r4)
- subi r1,r4,STACK_FRAME_OVERHEAD
+ std r5, 8(r1) // Save CR in caller's frame
+ std r0, 16(r1) // Save LR in caller's frame
+ // Create frame on emergency stack
+ ld r4, PACAEMERGSP(r13)
+ stdu r1, -SWITCH_FRAME_SIZE(r4)
+ // Switch to new frame on emergency stack
+ mr r1, r4
+ std r3, 32(r1) // Save SRR1 wakeup value
SAVE_NVGPRS(r1)
/*
@@ -313,6 +326,10 @@ kvm_unsplit_wakeup:
kvm_secondary_got_guest:
+ // About to go to guest, clear saved SRR1
+ li r0, 0
+ std r0, 32(r1)
+
/* Set HSTATE_DSCR(r13) to something sensible */
ld r6, PACA_DSCR_DEFAULT(r13)
std r6, HSTATE_DSCR(r13)
@@ -364,7 +381,7 @@ kvm_secondary_got_guest:
bne kvm_no_guest
li r3,0 /* NULL argument */
- bl hmi_exception_realmode
+ bl CFUNC(hmi_exception_realmode)
/*
* At this point we have finished executing in the guest.
* We need to wait for hwthread_req to become zero, since
@@ -392,13 +409,12 @@ kvm_no_guest:
mfspr r4, SPRN_LPCR
rlwimi r4, r3, 0, LPCR_PECE0 | LPCR_PECE1
mtspr SPRN_LPCR, r4
- /* set up r3 for return */
- mfspr r3,SPRN_SRR1
+ // Return SRR1 wakeup value, or 0 if we went into the guest
+ ld r3, 32(r1)
REST_NVGPRS(r1)
- addi r1, r1, STACK_FRAME_OVERHEAD
- ld r0, 16(r1)
- ld r5, 8(r1)
- ld r1, 0(r1)
+ ld r1, 0(r1) // Switch back to caller stack
+ ld r0, 16(r1) // Reload LR
+ ld r5, 8(r1) // Reload CR
mtlr r0
mtcr r5
blr
@@ -442,7 +458,7 @@ kvm_unsplit_nap:
cmpwi r12, BOOK3S_INTERRUPT_HMI
bne 55f
li r3, 0 /* NULL argument */
- bl hmi_exception_realmode
+ bl CFUNC(hmi_exception_realmode)
55:
/*
* Ensure that secondary doesn't nap when it has
@@ -486,8 +502,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
* *
*****************************************************************************/
-.global kvmppc_hv_entry
-kvmppc_hv_entry:
+SYM_CODE_START_LOCAL(kvmppc_hv_entry)
/* Required state:
*
@@ -509,7 +524,7 @@ kvmppc_hv_entry:
li r6, KVM_GUEST_MODE_HOST_HV
stb r6, HSTATE_IN_GUEST(r13)
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
/* Store initial timestamp */
cmpdi r4, 0
beq 1f
@@ -772,17 +787,14 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
/* Restore AMR and UAMOR, set AMOR to all 1s */
ld r5,VCPU_AMR(r4)
ld r6,VCPU_UAMOR(r4)
- li r7,-1
mtspr SPRN_AMR,r5
mtspr SPRN_UAMOR,r6
- mtspr SPRN_AMOR,r7
- /* Restore state of CTRL run bit; assume 1 on entry */
+ /* Restore state of CTRL run bit; the host currently has it set to 1 */
lwz r5,VCPU_CTRL(r4)
andi. r5,r5,1
bne 4f
- mfspr r6,SPRN_CTRLF
- clrrdi r6,r6,1
+ li r6,0
mtspr SPRN_CTRLT,r6
4:
/* Secondary threads wait for primary to have done partition switch */
@@ -811,10 +823,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
* Set the decrementer to the guest decrementer.
*/
ld r8,VCPU_DEC_EXPIRES(r4)
- /* r8 is a host timebase value here, convert to guest TB */
- ld r5,HSTATE_KVM_VCORE(r13)
- ld r6,VCORE_TB_OFFSET_APPL(r5)
- add r8,r8,r6
mftb r7
subf r3,r7,r8
mtspr SPRN_DEC,r3
@@ -850,7 +858,7 @@ deliver_guest_interrupt: /* r4 = vcpu, r13 = paca */
cmpdi r0, 0
beq 71f
mr r3, r4
- bl kvmppc_guest_entry_inject_int
+ bl CFUNC(kvmppc_guest_entry_inject_int)
ld r4, HSTATE_KVM_VCPU(r13)
71:
ld r6, VCPU_SRR0(r4)
@@ -887,7 +895,7 @@ fast_guest_return:
li r9, KVM_GUEST_MODE_GUEST_HV
stb r9, HSTATE_IN_GUEST(r13)
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
/* Accumulate timing */
addi r3, r4, VCPU_TB_GUEST
bl kvmhv_accumulate_time
@@ -931,6 +939,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
ld r4, VCPU_GPR(R4)(r4)
HRFI_TO_GUEST
b .
+SYM_CODE_END(kvmppc_hv_entry)
secondary_too_late:
li r12, 0
@@ -938,7 +947,7 @@ secondary_too_late:
cmpdi r4, 0
beq 11f
stw r12, VCPU_TRAP(r4)
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
addi r3, r4, VCPU_TB_RMEXIT
bl kvmhv_accumulate_time
#endif
@@ -952,7 +961,7 @@ hdec_soon:
li r12, BOOK3S_INTERRUPT_HV_DECREMENTER
12: stw r12, VCPU_TRAP(r4)
mr r9, r4
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
addi r3, r4, VCPU_TB_RMEXIT
bl kvmhv_accumulate_time
#endif
@@ -1017,7 +1026,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
/* Restore R1/R2 so we can handle faults */
ld r1, HSTATE_HOST_R1(r13)
- ld r2, PACATOC(r13)
+ LOAD_PACA_TOC()
mfspr r10, SPRN_SRR0
mfspr r11, SPRN_SRR1
@@ -1049,7 +1058,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
li r0, MSR_RI
mtmsrd r0, 1
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
addi r3, r9, VCPU_TB_RMINTR
mr r4, r9
bl kvmhv_accumulate_time
@@ -1062,11 +1071,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
/* Save HEIR (HV emulation assist reg) in emul_inst
if this is an HEI (HV emulation interrupt, e40) */
li r3,KVM_INST_FETCH_FAILED
- stw r3,VCPU_LAST_INST(r9)
+ std r3,VCPU_LAST_INST(r9)
cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST
bne 11f
mfspr r3,SPRN_HEIR
-11: stw r3,VCPU_HEIR(r9)
+11: std r3,VCPU_HEIR(r9)
/* these are volatile across C function calls */
mfctr r3
@@ -1088,12 +1097,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
cmpwi r12, BOOK3S_INTERRUPT_H_INST_STORAGE
beq kvmppc_hisi
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
- /* For softpatch interrupt, go off and do TM instruction emulation */
- cmpwi r12, BOOK3S_INTERRUPT_HV_SOFTPATCH
- beq kvmppc_tm_emul
-#endif
-
/* See if this is a leftover HDEC interrupt */
cmpwi r12,BOOK3S_INTERRUPT_HV_DECREMENTER
bne 2f
@@ -1134,7 +1137,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
guest_exit_cont: /* r9 = vcpu, r12 = trap, r13 = paca */
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
addi r3, r9, VCPU_TB_RMEXIT
mr r4, r9
bl kvmhv_accumulate_time
@@ -1195,9 +1198,6 @@ guest_bypass:
mftb r6
extsw r5,r5
16: add r5,r5,r6
- /* r5 is a guest timebase value here, convert to host TB */
- ld r4,VCORE_TB_OFFSET_APPL(r3)
- subf r5,r4,r5
std r5,VCPU_DEC_EXPIRES(r9)
/* Increment exit count, poke other threads to exit */
@@ -1211,12 +1211,12 @@ guest_bypass:
stw r0, VCPU_CPU(r9)
stw r0, VCPU_THREAD_CPU(r9)
- /* Save guest CTRL register, set runlatch to 1 */
+ /* Save guest CTRL register, set runlatch to 1 if it was clear */
mfspr r6,SPRN_CTRLF
stw r6,VCPU_CTRL(r9)
andi. r0,r6,1
bne 4f
- ori r6,r6,1
+ li r6,1
mtspr SPRN_CTRLT,r6
4:
/*
@@ -1497,7 +1497,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
mtspr SPRN_LPCR,r8
isync
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
/* Finish timing, if we have a vcpu */
ld r4, HSTATE_KVM_VCPU(r13)
cmpdi r4, 0
@@ -1542,7 +1542,7 @@ kvmppc_guest_external:
/* External interrupt, first check for host_ipi. If this is
* set, we know the host wants us out so let's do it now
*/
- bl kvmppc_read_intr
+ bl CFUNC(kvmppc_read_intr)
/*
* Restore the active volatile registers after returning from
@@ -1599,42 +1599,6 @@ maybe_reenter_guest:
blt deliver_guest_interrupt
b guest_exit_cont
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-/*
- * Softpatch interrupt for transactional memory emulation cases
- * on POWER9 DD2.2. This is early in the guest exit path - we
- * haven't saved registers or done a treclaim yet.
- */
-kvmppc_tm_emul:
- /* Save instruction image in HEIR */
- mfspr r3, SPRN_HEIR
- stw r3, VCPU_HEIR(r9)
-
- /*
- * The cases we want to handle here are those where the guest
- * is in real suspend mode and is trying to transition to
- * transactional mode.
- */
- lbz r0, HSTATE_FAKE_SUSPEND(r13)
- cmpwi r0, 0 /* keep exiting guest if in fake suspend */
- bne guest_exit_cont
- rldicl r3, r11, 64 - MSR_TS_S_LG, 62
- cmpwi r3, 1 /* or if not in suspend state */
- bne guest_exit_cont
-
- /* Call C code to do the emulation */
- mr r3, r9
- bl kvmhv_p9_tm_emulation_early
- nop
- ld r9, HSTATE_KVM_VCPU(r13)
- li r12, BOOK3S_INTERRUPT_HV_SOFTPATCH
- cmpwi r3, 0
- beq guest_exit_cont /* continue exiting if not handled */
- ld r10, VCPU_PC(r9)
- ld r11, VCPU_MSR(r9)
- b fast_interrupt_c_return /* go back to guest if handled */
-#endif /* CONFIG_PPC_TRANSACTIONAL_MEM */
-
/*
* Check whether an HDSI is an HPTE not found fault or something else.
* If it is an HPTE not found fault that is due to the guest accessing
@@ -1660,7 +1624,7 @@ kvmppc_hdsi:
/* Search the hash table. */
mr r3, r9 /* vcpu pointer */
li r7, 1 /* data fault */
- bl kvmppc_hpte_hv_fault
+ bl CFUNC(kvmppc_hpte_hv_fault)
ld r9, HSTATE_KVM_VCPU(r13)
ld r10, VCPU_PC(r9)
ld r11, VCPU_MSR(r9)
@@ -1710,7 +1674,7 @@ fast_interrupt_c_return:
mtmsrd r3
/* Store the result */
- stw r8, VCPU_LAST_INST(r9)
+ std r8, VCPU_LAST_INST(r9)
/* Unset guest mode. */
li r0, KVM_GUEST_MODE_HOST_HV
@@ -1736,7 +1700,7 @@ kvmppc_hisi:
mr r4, r10
mr r6, r11
li r7, 0 /* instruction fault */
- bl kvmppc_hpte_hv_fault
+ bl CFUNC(kvmppc_hpte_hv_fault)
ld r9, HSTATE_KVM_VCPU(r13)
ld r10, VCPU_PC(r9)
ld r11, VCPU_MSR(r9)
@@ -1830,13 +1794,8 @@ hcall_real_table:
.long DOTSYM(kvmppc_h_clear_mod) - hcall_real_table
.long DOTSYM(kvmppc_h_clear_ref) - hcall_real_table
.long DOTSYM(kvmppc_h_protect) - hcall_real_table
-#ifdef CONFIG_SPAPR_TCE_IOMMU
- .long DOTSYM(kvmppc_h_get_tce) - hcall_real_table
- .long DOTSYM(kvmppc_rm_h_put_tce) - hcall_real_table
-#else
.long 0 /* 0x1c */
.long 0 /* 0x20 */
-#endif
.long 0 /* 0x24 - H_SET_SPRG0 */
.long DOTSYM(kvmppc_h_set_dabr) - hcall_real_table
.long DOTSYM(kvmppc_rm_h_page_init) - hcall_real_table
@@ -1854,11 +1813,11 @@ hcall_real_table:
.long 0 /* 0x5c */
.long 0 /* 0x60 */
#ifdef CONFIG_KVM_XICS
- .long DOTSYM(kvmppc_rm_h_eoi) - hcall_real_table
- .long DOTSYM(kvmppc_rm_h_cppr) - hcall_real_table
- .long DOTSYM(kvmppc_rm_h_ipi) - hcall_real_table
- .long DOTSYM(kvmppc_rm_h_ipoll) - hcall_real_table
- .long DOTSYM(kvmppc_rm_h_xirr) - hcall_real_table
+ .long DOTSYM(xics_rm_h_eoi) - hcall_real_table
+ .long DOTSYM(xics_rm_h_cppr) - hcall_real_table
+ .long DOTSYM(xics_rm_h_ipi) - hcall_real_table
+ .long 0 /* 0x70 - H_IPOLL */
+ .long DOTSYM(xics_rm_h_xirr) - hcall_real_table
#else
.long 0 /* 0x64 - H_EOI */
.long 0 /* 0x68 - H_CPPR */
@@ -1914,13 +1873,8 @@ hcall_real_table:
.long 0 /* 0x12c */
.long 0 /* 0x130 */
.long DOTSYM(kvmppc_h_set_xdabr) - hcall_real_table
-#ifdef CONFIG_SPAPR_TCE_IOMMU
- .long DOTSYM(kvmppc_rm_h_stuff_tce) - hcall_real_table
- .long DOTSYM(kvmppc_rm_h_put_tce_indirect) - hcall_real_table
-#else
.long 0 /* 0x138 */
.long 0 /* 0x13c */
-#endif
.long 0 /* 0x140 */
.long 0 /* 0x144 */
.long 0 /* 0x148 */
@@ -2033,7 +1987,7 @@ hcall_real_table:
.long 0 /* 0x2f4 */
.long 0 /* 0x2f8 */
#ifdef CONFIG_KVM_XICS
- .long DOTSYM(kvmppc_rm_h_xirr_x) - hcall_real_table
+ .long DOTSYM(xics_rm_h_xirr_x) - hcall_real_table
#else
.long 0 /* 0x2fc - H_XIRR_X*/
#endif
@@ -2041,7 +1995,7 @@ hcall_real_table:
.globl hcall_real_table_end
hcall_real_table_end:
-_GLOBAL(kvmppc_h_set_xdabr)
+_GLOBAL_TOC(kvmppc_h_set_xdabr)
EXPORT_SYMBOL_GPL(kvmppc_h_set_xdabr)
andi. r0, r5, DABRX_USER | DABRX_KERNEL
beq 6f
@@ -2051,7 +2005,7 @@ EXPORT_SYMBOL_GPL(kvmppc_h_set_xdabr)
6: li r3, H_PARAMETER
blr
-_GLOBAL(kvmppc_h_set_dabr)
+_GLOBAL_TOC(kvmppc_h_set_dabr)
EXPORT_SYMBOL_GPL(kvmppc_h_set_dabr)
li r5, DABRX_USER | DABRX_KERNEL
3:
@@ -2199,12 +2153,9 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
/* save expiry time of guest decrementer */
add r3, r3, r5
ld r4, HSTATE_KVM_VCPU(r13)
- ld r5, HSTATE_KVM_VCORE(r13)
- ld r6, VCORE_TB_OFFSET_APPL(r5)
- subf r3, r6, r3 /* convert to host TB value */
std r3, VCPU_DEC_EXPIRES(r4)
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
ld r4, HSTATE_KVM_VCPU(r13)
addi r3, r4, VCPU_TB_CEDE
bl kvmhv_accumulate_time
@@ -2222,8 +2173,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
* Also clear the runlatch bit before napping.
*/
kvm_do_nap:
- mfspr r0, SPRN_CTRLF
- clrrdi r0, r0, 1
+ li r0,0
mtspr SPRN_CTRLT, r0
li r0,1
@@ -2242,8 +2192,7 @@ kvm_nap_sequence: /* desired LPCR value in r5 */
bl isa206_idle_insn_mayloss
- mfspr r0, SPRN_CTRLF
- ori r0, r0, 1
+ li r0,1
mtspr SPRN_CTRLT, r0
mtspr SPRN_SRR1, r3
@@ -2274,7 +2223,7 @@ kvm_end_cede:
/* get vcpu pointer */
ld r4, HSTATE_KVM_VCPU(r13)
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
addi r3, r4, VCPU_TB_RMINTR
bl kvmhv_accumulate_time
#endif
@@ -2300,9 +2249,6 @@ END_FTR_SECTION_IFCLR(CPU_FTR_TM)
/* Restore guest decrementer */
ld r3, VCPU_DEC_EXPIRES(r4)
- ld r5, HSTATE_KVM_VCORE(r13)
- ld r6, VCORE_TB_OFFSET_APPL(r5)
- add r3, r3, r6 /* convert host TB to guest TB value */
mftb r7
subf r3, r7, r3
mtspr SPRN_DEC, r3
@@ -2394,7 +2340,7 @@ hmi_realmode:
lbz r0, HSTATE_PTID(r13)
cmpwi r0, 0
bne guest_exit_cont
- bl kvmppc_realmode_hmi_handler
+ bl CFUNC(kvmppc_realmode_hmi_handler)
ld r9, HSTATE_KVM_VCPU(r13)
li r12, BOOK3S_INTERRUPT_HMI
b guest_exit_cont
@@ -2414,7 +2360,7 @@ hmi_realmode:
* This routine calls kvmppc_read_intr, a C function, if an external
* interrupt is pending.
*/
-kvmppc_check_wake_reason:
+SYM_FUNC_START_LOCAL(kvmppc_check_wake_reason)
mfspr r6, SPRN_SRR1
BEGIN_FTR_SECTION
rlwinm r6, r6, 45-31, 0xf /* extract wake reason field (P8) */
@@ -2465,7 +2411,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
7: mflr r0
std r0, PPC_LR_STKOFF(r1)
stdu r1, -PPC_MIN_STKFRM(r1)
- bl kvmppc_read_intr
+ bl CFUNC(kvmppc_read_intr)
nop
li r12, BOOK3S_INTERRUPT_EXTERNAL
cmpdi r3, 1
@@ -2483,6 +2429,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
addi r1, r1, PPC_MIN_STKFRM
mtlr r0
blr
+SYM_FUNC_END(kvmppc_check_wake_reason)
/*
* Save away FP, VMX and VSX registers.
@@ -2490,7 +2437,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
* N.B. r30 and r31 are volatile across this function,
* thus it is not callable from C.
*/
-kvmppc_save_fp:
+SYM_FUNC_START_LOCAL(kvmppc_save_fp)
mflr r30
mr r31,r3
mfmsr r5
@@ -2518,6 +2465,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
stw r6,VCPU_VRSAVE(r31)
mtlr r30
blr
+SYM_FUNC_END(kvmppc_save_fp)
/*
* Load up FP, VMX and VSX registers
@@ -2525,7 +2473,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
* N.B. r30 and r31 are volatile across this function,
* thus it is not callable from C.
*/
-kvmppc_load_fp:
+SYM_FUNC_START_LOCAL(kvmppc_load_fp)
mflr r30
mr r31,r4
mfmsr r9
@@ -2554,6 +2502,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
mtlr r30
mr r4,r31
blr
+SYM_FUNC_END(kvmppc_load_fp)
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
/*
@@ -2578,7 +2527,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_P9_TM_HV_ASSIST)
/* The following code handles the fake_suspend = 1 case */
mflr r0
std r0, PPC_LR_STKOFF(r1)
- stdu r1, -PPC_MIN_STKFRM(r1)
+ stdu r1, -TM_FRAME_SIZE(r1)
/* Turn on TM. */
mfmsr r8
@@ -2593,10 +2542,42 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_IFSET(CPU_FTR_P9_TM_XER_SO_BUG)
nop
+ /*
+ * It's possible that treclaim. may modify registers, if we have lost
+ * track of fake-suspend state in the guest due to it using rfscv.
+ * Save and restore registers in case this occurs.
+ */
+ mfspr r3, SPRN_DSCR
+ mfspr r4, SPRN_XER
+ mfspr r5, SPRN_AMR
+ /* SPRN_TAR would need to be saved here if the kernel ever used it */
+ mfcr r12
+ SAVE_NVGPRS(r1)
+ SAVE_GPR(2, r1)
+ SAVE_GPR(3, r1)
+ SAVE_GPR(4, r1)
+ SAVE_GPR(5, r1)
+ stw r12, 8(r1)
+ std r1, HSTATE_HOST_R1(r13)
+
/* We have to treclaim here because that's the only way to do S->N */
li r3, TM_CAUSE_KVM_RESCHED
TRECLAIM(R3)
+ GET_PACA(r13)
+ ld r1, HSTATE_HOST_R1(r13)
+ REST_GPR(2, r1)
+ REST_GPR(3, r1)
+ REST_GPR(4, r1)
+ REST_GPR(5, r1)
+ lwz r12, 8(r1)
+ REST_NVGPRS(r1)
+ mtspr SPRN_DSCR, r3
+ mtspr SPRN_XER, r4
+ mtspr SPRN_AMR, r5
+ mtcr r12
+ HMT_MEDIUM
+
/*
* We were in fake suspend, so we are not going to save the
* register state as the guest checkpointed state (since
@@ -2624,7 +2605,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_P9_TM_XER_SO_BUG)
std r5, VCPU_TFHAR(r9)
std r6, VCPU_TFIAR(r9)
- addi r1, r1, PPC_MIN_STKFRM
+ addi r1, r1, TM_FRAME_SIZE
ld r0, PPC_LR_STKOFF(r1)
mtlr r0
blr
@@ -2715,8 +2696,7 @@ kvmppc_bad_host_intr:
std r0, GPR0(r1)
std r9, GPR1(r1)
std r2, GPR2(r1)
- SAVE_4GPRS(3, r1)
- SAVE_2GPRS(7, r1)
+ SAVE_GPRS(3, 8, r1)
srdi r0, r12, 32
clrldi r12, r12, 32
std r0, _CCR(r1)
@@ -2739,7 +2719,7 @@ kvmppc_bad_host_intr:
ld r9, HSTATE_SCRATCH2(r13)
ld r12, HSTATE_SCRATCH0(r13)
GET_SCRATCH0(r0)
- SAVE_4GPRS(9, r1)
+ SAVE_GPRS(9, 12, r1)
std r0, GPR13(r1)
SAVE_NVGPRS(r1)
ld r5, HSTATE_CFAR(r13)
@@ -2752,9 +2732,9 @@ kvmppc_bad_host_intr:
std r4, _CTR(r1)
std r5, _XER(r1)
std r6, SOFTE(r1)
- ld r2, PACATOC(r13)
- LOAD_REG_IMMEDIATE(3, 0x7265677368657265)
- std r3, STACK_FRAME_OVERHEAD-16(r1)
+ LOAD_PACA_TOC()
+ LOAD_REG_IMMEDIATE(3, STACK_FRAME_REGS_MARKER)
+ std r3, STACK_INT_FRAME_MARKER(r1)
/*
* XXX On POWER7 and POWER8, we just spin here since we don't
@@ -2771,7 +2751,7 @@ kvmppc_bad_host_intr:
* r9 has a vcpu pointer (in)
* r0 is used as a scratch register
*/
-kvmppc_msr_interrupt:
+SYM_FUNC_START_LOCAL(kvmppc_msr_interrupt)
rldicl r0, r11, 64 - MSR_TS_S_LG, 62
cmpwi r0, 2 /* Check if we are in transactional state.. */
ld r11, VCPU_INTR_MSR(r9)
@@ -2780,12 +2760,14 @@ kvmppc_msr_interrupt:
li r0, 1
1: rldimi r11, r0, MSR_TS_S_LG, 63 - MSR_TS_T_LG
blr
+SYM_FUNC_END(kvmppc_msr_interrupt)
/*
+ * void kvmhv_load_guest_pmu(struct kvm_vcpu *vcpu)
+ *
* Load up guest PMU state. R3 points to the vcpu struct.
*/
-_GLOBAL(kvmhv_load_guest_pmu)
-EXPORT_SYMBOL_GPL(kvmhv_load_guest_pmu)
+SYM_FUNC_START_LOCAL(kvmhv_load_guest_pmu)
mr r4, r3
mflr r0
li r3, 1
@@ -2820,37 +2802,29 @@ END_FTR_SECTION_IFSET(CPU_FTR_PMAO_BUG)
mtspr SPRN_SIAR, r7
mtspr SPRN_SDAR, r8
BEGIN_FTR_SECTION
- ld r5, VCPU_MMCR + 24(r4)
- ld r6, VCPU_SIER + 8(r4)
- ld r7, VCPU_SIER + 16(r4)
- mtspr SPRN_MMCR3, r5
- mtspr SPRN_SIER2, r6
- mtspr SPRN_SIER3, r7
-END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31)
-BEGIN_FTR_SECTION
ld r5, VCPU_MMCR + 16(r4)
ld r6, VCPU_SIER(r4)
mtspr SPRN_MMCR2, r5
mtspr SPRN_SIER, r6
-BEGIN_FTR_SECTION_NESTED(96)
lwz r7, VCPU_PMC + 24(r4)
lwz r8, VCPU_PMC + 28(r4)
ld r9, VCPU_MMCRS(r4)
mtspr SPRN_SPMC1, r7
mtspr SPRN_SPMC2, r8
mtspr SPRN_MMCRS, r9
-END_FTR_SECTION_NESTED(CPU_FTR_ARCH_300, 0, 96)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
mtspr SPRN_MMCR0, r3
isync
mtlr r0
blr
+SYM_FUNC_END(kvmhv_load_guest_pmu)
/*
+ * void kvmhv_load_host_pmu(void)
+ *
* Reload host PMU state saved in the PACA by kvmhv_save_host_pmu.
*/
-_GLOBAL(kvmhv_load_host_pmu)
-EXPORT_SYMBOL_GPL(kvmhv_load_host_pmu)
+SYM_FUNC_START_LOCAL(kvmhv_load_host_pmu)
mflr r0
lbz r4, PACA_PMCINUSE(r13) /* is the host using the PMU? */
cmpwi r4, 0
@@ -2888,25 +2862,19 @@ BEGIN_FTR_SECTION
mtspr SPRN_MMCR2, r8
mtspr SPRN_SIER, r9
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
-BEGIN_FTR_SECTION
- ld r5, HSTATE_MMCR3(r13)
- ld r6, HSTATE_SIER2(r13)
- ld r7, HSTATE_SIER3(r13)
- mtspr SPRN_MMCR3, r5
- mtspr SPRN_SIER2, r6
- mtspr SPRN_SIER3, r7
-END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31)
mtspr SPRN_MMCR0, r3
isync
mtlr r0
23: blr
+SYM_FUNC_END(kvmhv_load_host_pmu)
/*
+ * void kvmhv_save_guest_pmu(struct kvm_vcpu *vcpu, bool pmu_in_use)
+ *
* Save guest PMU state into the vcpu struct.
* r3 = vcpu, r4 = full save flag (PMU in use flag set in VPA)
*/
-_GLOBAL(kvmhv_save_guest_pmu)
-EXPORT_SYMBOL_GPL(kvmhv_save_guest_pmu)
+SYM_FUNC_START_LOCAL(kvmhv_save_guest_pmu)
mr r9, r3
mr r8, r4
BEGIN_FTR_SECTION
@@ -2955,14 +2923,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
BEGIN_FTR_SECTION
std r10, VCPU_MMCR + 16(r9)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
-BEGIN_FTR_SECTION
- mfspr r5, SPRN_MMCR3
- mfspr r6, SPRN_SIER2
- mfspr r7, SPRN_SIER3
- std r5, VCPU_MMCR + 24(r9)
- std r6, VCPU_SIER + 8(r9)
- std r7, VCPU_SIER + 16(r9)
-END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31)
std r7, VCPU_SIAR(r9)
std r8, VCPU_SDAR(r9)
mfspr r3, SPRN_PMC1
@@ -2980,7 +2940,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_31)
BEGIN_FTR_SECTION
mfspr r5, SPRN_SIER
std r5, VCPU_SIER(r9)
-BEGIN_FTR_SECTION_NESTED(96)
mfspr r6, SPRN_SPMC1
mfspr r7, SPRN_SPMC2
mfspr r8, SPRN_MMCRS
@@ -2989,9 +2948,9 @@ BEGIN_FTR_SECTION_NESTED(96)
std r8, VCPU_MMCRS(r9)
lis r4, 0x8000
mtspr SPRN_MMCRS, r4
-END_FTR_SECTION_NESTED(CPU_FTR_ARCH_300, 0, 96)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
22: blr
+SYM_FUNC_END(kvmhv_save_guest_pmu)
/*
* This works around a hardware bug on POWER8E processors, where
@@ -3011,7 +2970,7 @@ kvmppc_fix_pmao:
isync
blr
-#ifdef CONFIG_KVM_BOOK3S_HV_EXIT_TIMING
+#ifdef CONFIG_KVM_BOOK3S_HV_P8_TIMING
/*
* Start timing an activity
* r3 = pointer to time accumulation struct, r4 = vcpu
generated by cgit (git 2.34.1) at 2025-12-27 16:57:24 +0000