diff options
| -rw-r--r-- | arch/powerpc/kvm/book3s_interrupts.S | 201 |
1 files changed, 101 insertions, 100 deletions
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S index 570f8740769..a1b50280dc4 100644 --- a/arch/powerpc/kvm/book3s_interrupts.S +++ b/arch/powerpc/kvm/book3s_interrupts.S @@ -24,36 +24,56 @@ #include <asm/asm-offsets.h> #include <asm/exception-64s.h> -#define KVMPPC_HANDLE_EXIT .kvmppc_handle_exit -#define ULONG_SIZE 8 -#define VCPU_GPR(n) (VCPU_GPRS + (n * ULONG_SIZE)) +#if defined(CONFIG_PPC_BOOK3S_64) -.macro DISABLE_INTERRUPTS - mfmsr r0 - rldicl r0,r0,48,1 - rotldi r0,r0,16 - mtmsrd r0,1 -.endm +#define ULONG_SIZE 8 +#define FUNC(name) GLUE(.,name) +#define GET_SHADOW_VCPU(reg) \ + addi reg, r13, PACA_KVM_SVCPU + +#define DISABLE_INTERRUPTS \ + mfmsr r0; \ + rldicl r0,r0,48,1; \ + rotldi r0,r0,16; \ + mtmsrd r0,1; \ + +#elif defined(CONFIG_PPC_BOOK3S_32) + +#define ULONG_SIZE 4 +#define FUNC(name) name + +#define GET_SHADOW_VCPU(reg) \ + lwz reg, (THREAD + THREAD_KVM_SVCPU)(r2) + +#define DISABLE_INTERRUPTS \ + mfmsr r0; \ + rlwinm r0,r0,0,17,15; \ + mtmsr r0; \ + +#endif /* CONFIG_PPC_BOOK3S_XX */ + + +#define VCPU_GPR(n) (VCPU_GPRS + (n * ULONG_SIZE)) #define VCPU_LOAD_NVGPRS(vcpu) \ - ld r14, VCPU_GPR(r14)(vcpu); \ - ld r15, VCPU_GPR(r15)(vcpu); \ - ld r16, VCPU_GPR(r16)(vcpu); \ - ld r17, VCPU_GPR(r17)(vcpu); \ - ld r18, VCPU_GPR(r18)(vcpu); \ - ld r19, VCPU_GPR(r19)(vcpu); \ - ld r20, VCPU_GPR(r20)(vcpu); \ - ld r21, VCPU_GPR(r21)(vcpu); \ - ld r22, VCPU_GPR(r22)(vcpu); \ - ld r23, VCPU_GPR(r23)(vcpu); \ - ld r24, VCPU_GPR(r24)(vcpu); \ - ld r25, VCPU_GPR(r25)(vcpu); \ - ld r26, VCPU_GPR(r26)(vcpu); \ - ld r27, VCPU_GPR(r27)(vcpu); \ - ld r28, VCPU_GPR(r28)(vcpu); \ - ld r29, VCPU_GPR(r29)(vcpu); \ - ld r30, VCPU_GPR(r30)(vcpu); \ - ld r31, VCPU_GPR(r31)(vcpu); \ + PPC_LL r14, VCPU_GPR(r14)(vcpu); \ + PPC_LL r15, VCPU_GPR(r15)(vcpu); \ + PPC_LL r16, VCPU_GPR(r16)(vcpu); \ + PPC_LL r17, VCPU_GPR(r17)(vcpu); \ + PPC_LL r18, VCPU_GPR(r18)(vcpu); \ + PPC_LL r19, VCPU_GPR(r19)(vcpu); \ + PPC_LL r20, VCPU_GPR(r20)(vcpu); \ + PPC_LL r21, VCPU_GPR(r21)(vcpu); \ + PPC_LL r22, VCPU_GPR(r22)(vcpu); \ + PPC_LL r23, VCPU_GPR(r23)(vcpu); \ + PPC_LL r24, VCPU_GPR(r24)(vcpu); \ + PPC_LL r25, VCPU_GPR(r25)(vcpu); \ + PPC_LL r26, VCPU_GPR(r26)(vcpu); \ + PPC_LL r27, VCPU_GPR(r27)(vcpu); \ + PPC_LL r28, VCPU_GPR(r28)(vcpu); \ + PPC_LL r29, VCPU_GPR(r29)(vcpu); \ + PPC_LL r30, VCPU_GPR(r30)(vcpu); \ + PPC_LL r31, VCPU_GPR(r31)(vcpu); \ /***************************************************************************** * * @@ -69,11 +89,11 @@ _GLOBAL(__kvmppc_vcpu_entry) kvm_start_entry: /* Write correct stack frame */ - mflr r0 - std r0,16(r1) + mflr r0 + PPC_STL r0,PPC_LR_STKOFF(r1) /* Save host state to the stack */ - stdu r1, -SWITCH_FRAME_SIZE(r1) + PPC_STLU r1, -SWITCH_FRAME_SIZE(r1) /* Save r3 (kvm_run) and r4 (vcpu) */ SAVE_2GPRS(3, r1) @@ -82,33 +102,28 @@ kvm_start_entry: SAVE_NVGPRS(r1) /* Save LR */ - std r0, _LINK(r1) + PPC_STL r0, _LINK(r1) /* Load non-volatile guest state from the vcpu */ VCPU_LOAD_NVGPRS(r4) + GET_SHADOW_VCPU(r5) + /* Save R1/R2 in the PACA */ - std r1, PACA_KVM_HOST_R1(r13) - std r2, PACA_KVM_HOST_R2(r13) + PPC_STL r1, SVCPU_HOST_R1(r5) + PPC_STL r2, SVCPU_HOST_R2(r5) /* XXX swap in/out on load? */ - ld r3, VCPU_HIGHMEM_HANDLER(r4) - std r3, PACA_KVM_VMHANDLER(r13) + PPC_LL r3, VCPU_HIGHMEM_HANDLER(r4) + PPC_STL r3, SVCPU_VMHANDLER(r5) kvm_start_lightweight: - ld r9, VCPU_PC(r4) /* r9 = vcpu->arch.pc */ - ld r10, VCPU_SHADOW_MSR(r4) /* r10 = vcpu->arch.shadow_msr */ - - /* Load some guest state in the respective registers */ - ld r5, VCPU_CTR(r4) /* r5 = vcpu->arch.ctr */ - /* will be swapped in by rmcall */ - - ld r3, VCPU_LR(r4) /* r3 = vcpu->arch.lr */ - mtlr r3 /* LR = r3 */ + PPC_LL r10, VCPU_SHADOW_MSR(r4) /* r10 = vcpu->arch.shadow_msr */ DISABLE_INTERRUPTS +#ifdef CONFIG_PPC_BOOK3S_64 /* Some guests may need to have dcbz set to 32 byte length. * * Usually we ensure that by patching the guest's instructions @@ -118,7 +133,7 @@ kvm_start_lightweight: * because that's a lot faster. */ - ld r3, VCPU_HFLAGS(r4) + PPC_LL r3, VCPU_HFLAGS(r4) rldicl. r3, r3, 0, 63 /* CR = ((r3 & 1) == 0) */ beq no_dcbz32_on @@ -128,13 +143,15 @@ kvm_start_lightweight: no_dcbz32_on: - ld r6, VCPU_RMCALL(r4) +#endif /* CONFIG_PPC_BOOK3S_64 */ + + PPC_LL r6, VCPU_RMCALL(r4) mtctr r6 - ld r3, VCPU_TRAMPOLINE_ENTER(r4) + PPC_LL r3, VCPU_TRAMPOLINE_ENTER(r4) LOAD_REG_IMMEDIATE(r4, MSR_KERNEL & ~(MSR_IR | MSR_DR)) - /* Jump to SLB patching handlder and into our guest */ + /* Jump to segment patching handler and into our guest */ bctr /* @@ -149,31 +166,20 @@ kvmppc_handler_highmem: /* * Register usage at this point: * - * R0 = guest last inst - * R1 = host R1 - * R2 = host R2 - * R3 = guest PC - * R4 = guest MSR - * R5 = guest DAR - * R6 = guest DSISR - * R13 = PACA - * PACA.KVM.* = guest * + * R1 = host R1 + * R2 = host R2 + * R12 = exit handler id + * R13 = PACA + * SVCPU.* = guest * * */ /* R7 = vcpu */ - ld r7, GPR4(r1) - - /* Now save the guest state */ - - stw r0, VCPU_LAST_INST(r7) + PPC_LL r7, GPR4(r1) - std r3, VCPU_PC(r7) - std r4, VCPU_SHADOW_SRR1(r7) - std r5, VCPU_FAULT_DEAR(r7) - stw r6, VCPU_FAULT_DSISR(r7) +#ifdef CONFIG_PPC_BOOK3S_64 - ld r5, VCPU_HFLAGS(r7) + PPC_LL r5, VCPU_HFLAGS(r7) rldicl. r5, r5, 0, 63 /* CR = ((r5 & 1) == 0) */ beq no_dcbz32_off @@ -184,35 +190,29 @@ kvmppc_handler_highmem: no_dcbz32_off: - std r14, VCPU_GPR(r14)(r7) - std r15, VCPU_GPR(r15)(r7) - std r16, VCPU_GPR(r16)(r7) - std r17, VCPU_GPR(r17)(r7) - std r18, VCPU_GPR(r18)(r7) - std r19, VCPU_GPR(r19)(r7) - std r20, VCPU_GPR(r20)(r7) - std r21, VCPU_GPR(r21)(r7) - std r22, VCPU_GPR(r22)(r7) - std r23, VCPU_GPR(r23)(r7) - std r24, VCPU_GPR(r24)(r7) - std r25, VCPU_GPR(r25)(r7) - std r26, VCPU_GPR(r26)(r7) - std r27, VCPU_GPR(r27)(r7) - std r28, VCPU_GPR(r28)(r7) - std r29, VCPU_GPR(r29)(r7) - std r30, VCPU_GPR(r30)(r7) - std r31, VCPU_GPR(r31)(r7) - - /* Save guest CTR */ - mfctr r5 - std r5, VCPU_CTR(r7) - - /* Save guest LR */ - mflr r5 - std r5, VCPU_LR(r7) +#endif /* CONFIG_PPC_BOOK3S_64 */ + + PPC_STL r14, VCPU_GPR(r14)(r7) + PPC_STL r15, VCPU_GPR(r15)(r7) + PPC_STL r16, VCPU_GPR(r16)(r7) + PPC_STL r17, VCPU_GPR(r17)(r7) + PPC_STL r18, VCPU_GPR(r18)(r7) + PPC_STL r19, VCPU_GPR(r19)(r7) + PPC_STL r20, VCPU_GPR(r20)(r7) + PPC_STL r21, VCPU_GPR(r21)(r7) + PPC_STL r22, VCPU_GPR(r22)(r7) + PPC_STL r23, VCPU_GPR(r23)(r7) + PPC_STL r24, VCPU_GPR(r24)(r7) + PPC_STL r25, VCPU_GPR(r25)(r7) + PPC_STL r26, VCPU_GPR(r26)(r7) + PPC_STL r27, VCPU_GPR(r27)(r7) + PPC_STL r28, VCPU_GPR(r28)(r7) + PPC_STL r29, VCPU_GPR(r29)(r7) + PPC_STL r30, VCPU_GPR(r30)(r7) + PPC_STL r31, VCPU_GPR(r31)(r7) /* Restore host msr -> SRR1 */ - ld r6, VCPU_HOST_MSR(r7) + PPC_LL r6, VCPU_HOST_MSR(r7) /* * For some interrupts, we need to call the real Linux @@ -231,6 +231,7 @@ no_dcbz32_off: /* Back to EE=1 */ mtmsr r6 + sync b kvm_return_point call_linux_handler: @@ -249,14 +250,14 @@ call_linux_handler: */ /* Restore host IP -> SRR0 */ - ld r5, VCPU_HOST_RETIP(r7) + PPC_LL r5, VCPU_HOST_RETIP(r7) /* XXX Better move to a safe function? * What if we get an HTAB flush in between mtsrr0 and mtsrr1? */ mtlr r12 - ld r4, VCPU_TRAMPOLINE_LOWMEM(r7) + PPC_LL r4, VCPU_TRAMPOLINE_LOWMEM(r7) mtsrr0 r4 LOAD_REG_IMMEDIATE(r3, MSR_KERNEL & ~(MSR_IR | MSR_DR)) mtsrr1 r3 @@ -274,7 +275,7 @@ kvm_return_point: /* Restore r3 (kvm_run) and r4 (vcpu) */ REST_2GPRS(3, r1) - bl KVMPPC_HANDLE_EXIT + bl FUNC(kvmppc_handle_exit) /* If RESUME_GUEST, get back in the loop */ cmpwi r3, RESUME_GUEST @@ -285,7 +286,7 @@ kvm_return_point: kvm_exit_loop: - ld r4, _LINK(r1) + PPC_LL r4, _LINK(r1) mtlr r4 /* Restore non-volatile host registers (r14 - r31) */ @@ -296,8 +297,8 @@ kvm_exit_loop: kvm_loop_heavyweight: - ld r4, _LINK(r1) - std r4, (16 + SWITCH_FRAME_SIZE)(r1) + PPC_LL r4, _LINK(r1) + PPC_STL r4, (PPC_LR_STKOFF + SWITCH_FRAME_SIZE)(r1) /* Load vcpu and cpu_run */ REST_2GPRS(3, r1) |