From eee7ff9d2cc0eaaa00496bdf4193144104c7dc63 Mon Sep 17 00:00:00 2001 From: Michael Neuling Date: Wed, 8 Jan 2014 21:25:19 +1100 Subject: [PATCH] KVM: PPC: Book3S HV: Don't set DABR on POWER8 POWER8 doesn't have the DABR and DABRX registers; instead it has new DAWR/DAWRX registers, which will be handled in a later patch. Signed-off-by: Michael Neuling Signed-off-by: Paul Mackerras Signed-off-by: Alexander Graf --- arch/powerpc/kvm/book3s_hv_interrupts.S | 2 ++ arch/powerpc/kvm/book3s_hv_rmhandlers.S | 13 ++++++++++--- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kvm/book3s_hv_interrupts.S b/arch/powerpc/kvm/book3s_hv_interrupts.S index 928142c..00b7ed4 100644 --- a/arch/powerpc/kvm/book3s_hv_interrupts.S +++ b/arch/powerpc/kvm/book3s_hv_interrupts.S @@ -57,9 +57,11 @@ BEGIN_FTR_SECTION std r3, HSTATE_DSCR(r13) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) +BEGIN_FTR_SECTION /* Save host DABR */ mfspr r3, SPRN_DABR std r3, HSTATE_DABR(r13) +END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) /* Hard-disable interrupts */ mfmsr r10 diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index acbd1d6..66db71c 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -61,11 +61,13 @@ kvmppc_call_hv_entry: /* Back from guest - restore host state and return to caller */ +BEGIN_FTR_SECTION /* Restore host DABR and DABRX */ ld r5,HSTATE_DABR(r13) li r6,7 mtspr SPRN_DABR,r5 mtspr SPRN_DABRX,r6 +END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) /* Restore SPRG3 */ ld r3,PACA_SPRG3(r13) @@ -284,15 +286,17 @@ kvmppc_hv_entry: std r0, PPC_LR_STKOFF(r1) stdu r1, -112(r1) +BEGIN_FTR_SECTION /* Set partition DABR */ /* Do this before re-enabling PMU to avoid P7 DABR corruption bug */ li r5,3 ld r6,VCPU_DABR(r4) mtspr SPRN_DABRX,r5 mtspr SPRN_DABR,r6 -BEGIN_FTR_SECTION + BEGIN_FTR_SECTION_NESTED(89) isync -END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) + END_FTR_SECTION_NESTED(CPU_FTR_ARCH_206, CPU_FTR_ARCH_206, 89) +END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) /* Load guest PMU registers */ /* R4 is live here (vcpu pointer) */ @@ -1609,6 +1613,9 @@ ignore_hdec: b fast_guest_return _GLOBAL(kvmppc_h_set_dabr) +BEGIN_FTR_SECTION + b 2f +END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) std r4,VCPU_DABR(r3) /* Work around P7 bug where DABR can get corrupted on mtspr */ 1: mtspr SPRN_DABR,r4 @@ -1616,7 +1623,7 @@ _GLOBAL(kvmppc_h_set_dabr) cmpd r4, r5 bne 1b isync - li r3,0 +2: li r3,0 blr _GLOBAL(kvmppc_h_cede) -- 2.7.4