diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_interrupts.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_interrupts.S | 129 |
1 files changed, 5 insertions, 124 deletions
diff --git a/arch/powerpc/kvm/book3s_interrupts.S b/arch/powerpc/kvm/book3s_interrupts.S index c54b0e30cf3..0a8515a5c04 100644 --- a/arch/powerpc/kvm/book3s_interrupts.S +++ b/arch/powerpc/kvm/book3s_interrupts.S @@ -29,27 +29,11 @@ #define ULONG_SIZE 8 #define FUNC(name) GLUE(.,name) -#define GET_SHADOW_VCPU_R13 - -#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_R13 \ - lwz r13, (THREAD + THREAD_KVM_SVCPU)(r2) - -#define DISABLE_INTERRUPTS \ - mfmsr r0; \ - rlwinm r0,r0,0,17,15; \ - mtmsr r0; \ - #endif /* CONFIG_PPC_BOOK3S_XX */ @@ -108,44 +92,17 @@ kvm_start_entry: kvm_start_lightweight: - GET_SHADOW_VCPU_R13 - PPC_LL r3, VCPU_HIGHMEM_HANDLER(r4) - PPC_STL r3, HSTATE_VMHANDLER(r13) - - 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 - * to trap on dcbz and emulate it in the hypervisor. - * - * If we can, we should tell the CPU to use 32 byte dcbz though, - * because that's a lot faster. - */ - PPC_LL r3, VCPU_HFLAGS(r4) - rldicl. r3, r3, 0, 63 /* CR = ((r3 & 1) == 0) */ - beq no_dcbz32_on - - mfspr r3,SPRN_HID5 - ori r3, r3, 0x80 /* XXX HID5_dcbz32 = 0x80 */ - mtspr SPRN_HID5,r3 - -no_dcbz32_on: - + rldicl r3, r3, 0, 63 /* r3 &= 1 */ + stb r3, HSTATE_RESTORE_HID5(r13) #endif /* CONFIG_PPC_BOOK3S_64 */ - PPC_LL r6, VCPU_RMCALL(r4) - mtctr r6 - - PPC_LL r3, VCPU_TRAMPOLINE_ENTER(r4) - LOAD_REG_IMMEDIATE(r4, MSR_KERNEL & ~(MSR_IR | MSR_DR)) + PPC_LL r4, VCPU_SHADOW_MSR(r4) /* get shadow_msr */ /* Jump to segment patching handler and into our guest */ - bctr + bl FUNC(kvmppc_entry_trampoline) + nop /* * This is the handler in module memory. It gets jumped at from the @@ -170,21 +127,6 @@ kvmppc_handler_highmem: /* R7 = vcpu */ PPC_LL r7, GPR4(r1) -#ifdef CONFIG_PPC_BOOK3S_64 - - PPC_LL r5, VCPU_HFLAGS(r7) - rldicl. r5, r5, 0, 63 /* CR = ((r5 & 1) == 0) */ - beq no_dcbz32_off - - li r4, 0 - mfspr r5,SPRN_HID5 - rldimi r5,r4,6,56 - mtspr SPRN_HID5,r5 - -no_dcbz32_off: - -#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) @@ -204,67 +146,6 @@ no_dcbz32_off: PPC_STL r30, VCPU_GPR(r30)(r7) PPC_STL r31, VCPU_GPR(r31)(r7) - /* Restore host msr -> SRR1 */ - PPC_LL r6, VCPU_HOST_MSR(r7) - - /* - * For some interrupts, we need to call the real Linux - * handler, so it can do work for us. This has to happen - * as if the interrupt arrived from the kernel though, - * so let's fake it here where most state is restored. - * - * Call Linux for hardware interrupts/decrementer - * r3 = address of interrupt handler (exit reason) - */ - - cmpwi r12, BOOK3S_INTERRUPT_EXTERNAL - beq call_linux_handler - cmpwi r12, BOOK3S_INTERRUPT_DECREMENTER - beq call_linux_handler - cmpwi r12, BOOK3S_INTERRUPT_PERFMON - beq call_linux_handler - - /* Back to EE=1 */ - mtmsr r6 - sync - b kvm_return_point - -call_linux_handler: - - /* - * If we land here we need to jump back to the handler we - * came from. - * - * We have a page that we can access from real mode, so let's - * jump back to that and use it as a trampoline to get back into the - * interrupt handler! - * - * R3 still contains the exit code, - * R5 VCPU_HOST_RETIP and - * R6 VCPU_HOST_MSR - */ - - /* Restore host IP -> SRR0 */ - 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 - - PPC_LL r4, VCPU_TRAMPOLINE_LOWMEM(r7) - mtsrr0 r4 - LOAD_REG_IMMEDIATE(r3, MSR_KERNEL & ~(MSR_IR | MSR_DR)) - mtsrr1 r3 - - RFI - -.global kvm_return_point -kvm_return_point: - - /* Jump back to lightweight entry if we're supposed to */ - /* go back into the guest */ - /* Pass the exit number as 3rd argument to kvmppc_handle_exit */ mr r5, r12 |