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Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S66
1 files changed, 20 insertions, 46 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index 9b8d50a7cbaf..25043b50cb30 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -58,6 +58,8 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
#define STACK_SLOT_DAWR (SFS-56)
#define STACK_SLOT_DAWRX (SFS-64)
#define STACK_SLOT_HFSCR (SFS-72)
+#define STACK_SLOT_AMR (SFS-80)
+#define STACK_SLOT_UAMOR (SFS-88)
/* the following is used by the P9 short path */
#define STACK_SLOT_NVGPRS (SFS-152) /* 18 gprs */
@@ -726,11 +728,9 @@ BEGIN_FTR_SECTION
mfspr r5, SPRN_TIDR
mfspr r6, SPRN_PSSCR
mfspr r7, SPRN_PID
- mfspr r8, SPRN_IAMR
std r5, STACK_SLOT_TID(r1)
std r6, STACK_SLOT_PSSCR(r1)
std r7, STACK_SLOT_PID(r1)
- std r8, STACK_SLOT_IAMR(r1)
mfspr r5, SPRN_HFSCR
std r5, STACK_SLOT_HFSCR(r1)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
@@ -738,11 +738,18 @@ BEGIN_FTR_SECTION
mfspr r5, SPRN_CIABR
mfspr r6, SPRN_DAWR
mfspr r7, SPRN_DAWRX
+ mfspr r8, SPRN_IAMR
std r5, STACK_SLOT_CIABR(r1)
std r6, STACK_SLOT_DAWR(r1)
std r7, STACK_SLOT_DAWRX(r1)
+ std r8, STACK_SLOT_IAMR(r1)
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
+ mfspr r5, SPRN_AMR
+ std r5, STACK_SLOT_AMR(r1)
+ mfspr r6, SPRN_UAMOR
+ std r6, STACK_SLOT_UAMOR(r1)
+
BEGIN_FTR_SECTION
/* Set partition DABR */
/* Do this before re-enabling PMU to avoid P7 DABR corruption bug */
@@ -1631,22 +1638,25 @@ ALT_FTR_SECTION_END_IFCLR(CPU_FTR_ARCH_300)
mtspr SPRN_PSPB, r0
mtspr SPRN_WORT, r0
BEGIN_FTR_SECTION
- mtspr SPRN_IAMR, r0
mtspr SPRN_TCSCR, r0
/* Set MMCRS to 1<<31 to freeze and disable the SPMC counters */
li r0, 1
sldi r0, r0, 31
mtspr SPRN_MMCRS, r0
END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
-8:
- /* Save and reset AMR and UAMOR before turning on the MMU */
+ /* Save and restore AMR, IAMR and UAMOR before turning on the MMU */
+ ld r8, STACK_SLOT_IAMR(r1)
+ mtspr SPRN_IAMR, r8
+
+8: /* Power7 jumps back in here */
mfspr r5,SPRN_AMR
mfspr r6,SPRN_UAMOR
std r5,VCPU_AMR(r9)
std r6,VCPU_UAMOR(r9)
- li r6,0
- mtspr SPRN_AMR,r6
+ ld r5,STACK_SLOT_AMR(r1)
+ ld r6,STACK_SLOT_UAMOR(r1)
+ mtspr SPRN_AMR, r5
mtspr SPRN_UAMOR, r6
/* Switch DSCR back to host value */
@@ -1746,11 +1756,9 @@ BEGIN_FTR_SECTION
ld r5, STACK_SLOT_TID(r1)
ld r6, STACK_SLOT_PSSCR(r1)
ld r7, STACK_SLOT_PID(r1)
- ld r8, STACK_SLOT_IAMR(r1)
mtspr SPRN_TIDR, r5
mtspr SPRN_PSSCR, r6
mtspr SPRN_PID, r7
- mtspr SPRN_IAMR, r8
END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
#ifdef CONFIG_PPC_RADIX_MMU
@@ -2826,49 +2834,15 @@ kvm_cede_exit:
#endif /* CONFIG_KVM_XICS */
3: b guest_exit_cont
- /* Try to handle a machine check in real mode */
+ /* Try to do machine check recovery in real mode */
machine_check_realmode:
mr r3, r9 /* get vcpu pointer */
bl kvmppc_realmode_machine_check
nop
+ /* all machine checks go to virtual mode for further handling */
ld r9, HSTATE_KVM_VCPU(r13)
li r12, BOOK3S_INTERRUPT_MACHINE_CHECK
- /*
- * For the guest that is FWNMI capable, deliver all the MCE errors
- * (handled/unhandled) by exiting the guest with KVM_EXIT_NMI exit
- * reason. This new approach injects machine check errors in guest
- * address space to guest with additional information in the form
- * of RTAS event, thus enabling guest kernel to suitably handle
- * such errors.
- *
- * For the guest that is not FWNMI capable (old QEMU) fallback
- * to old behaviour for backward compatibility:
- * Deliver unhandled/fatal (e.g. UE) MCE errors to guest either
- * through machine check interrupt (set HSRR0 to 0x200).
- * For handled errors (no-fatal), just go back to guest execution
- * with current HSRR0.
- * if we receive machine check with MSR(RI=0) then deliver it to
- * guest as machine check causing guest to crash.
- */
- ld r11, VCPU_MSR(r9)
- rldicl. r0, r11, 64-MSR_HV_LG, 63 /* check if it happened in HV mode */
- bne guest_exit_cont /* if so, exit to host */
- /* Check if guest is capable of handling NMI exit */
- ld r10, VCPU_KVM(r9)
- lbz r10, KVM_FWNMI(r10)
- cmpdi r10, 1 /* FWNMI capable? */
- beq guest_exit_cont /* if so, exit with KVM_EXIT_NMI. */
-
- /* if not, fall through for backward compatibility. */
- andi. r10, r11, MSR_RI /* check for unrecoverable exception */
- beq 1f /* Deliver a machine check to guest */
- ld r10, VCPU_PC(r9)
- cmpdi r3, 0 /* Did we handle MCE ? */
- bne 2f /* Continue guest execution. */
- /* If not, deliver a machine check. SRR0/1 are already set */
-1: li r10, BOOK3S_INTERRUPT_MACHINE_CHECK
- bl kvmppc_msr_interrupt
-2: b fast_interrupt_c_return
+ b guest_exit_cont
/*
* Call C code to handle a HMI in real mode.