diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_rmhandlers.S | 102 |
1 files changed, 48 insertions, 54 deletions
diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S b/arch/powerpc/kvm/book3s_rmhandlers.S index 1a1b34487e7..c1f877c4a88 100644 --- a/arch/powerpc/kvm/book3s_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_rmhandlers.S @@ -36,41 +36,44 @@ #if defined(CONFIG_PPC_BOOK3S_64) #define LOAD_SHADOW_VCPU(reg) GET_PACA(reg) -#define SHADOW_VCPU_OFF PACA_KVM_SVCPU #define MSR_NOIRQ MSR_KERNEL & ~(MSR_IR | MSR_DR) #define FUNC(name) GLUE(.,name) +kvmppc_skip_interrupt: + /* + * Here all GPRs are unchanged from when the interrupt happened + * except for r13, which is saved in SPRG_SCRATCH0. + */ + mfspr r13, SPRN_SRR0 + addi r13, r13, 4 + mtspr SPRN_SRR0, r13 + GET_SCRATCH0(r13) + rfid + b . + +kvmppc_skip_Hinterrupt: + /* + * Here all GPRs are unchanged from when the interrupt happened + * except for r13, which is saved in SPRG_SCRATCH0. + */ + mfspr r13, SPRN_HSRR0 + addi r13, r13, 4 + mtspr SPRN_HSRR0, r13 + GET_SCRATCH0(r13) + hrfid + b . + #elif defined(CONFIG_PPC_BOOK3S_32) -#define LOAD_SHADOW_VCPU(reg) \ - mfspr reg, SPRN_SPRG_THREAD; \ - lwz reg, THREAD_KVM_SVCPU(reg); \ - /* PPC32 can have a NULL pointer - let's check for that */ \ - mtspr SPRN_SPRG_SCRATCH1, r12; /* Save r12 */ \ - mfcr r12; \ - cmpwi reg, 0; \ - bne 1f; \ - mfspr reg, SPRN_SPRG_SCRATCH0; \ - mtcr r12; \ - mfspr r12, SPRN_SPRG_SCRATCH1; \ - b kvmppc_resume_\intno; \ -1:; \ - mtcr r12; \ - mfspr r12, SPRN_SPRG_SCRATCH1; \ - tophys(reg, reg) - -#define SHADOW_VCPU_OFF 0 #define MSR_NOIRQ MSR_KERNEL #define FUNC(name) name -#endif - .macro INTERRUPT_TRAMPOLINE intno .global kvmppc_trampoline_\intno kvmppc_trampoline_\intno: - SET_SCRATCH0(r13) /* Save r13 */ + mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */ /* * First thing to do is to find out if we're coming @@ -78,19 +81,28 @@ kvmppc_trampoline_\intno: * * To distinguish, we check a magic byte in the PACA/current */ - LOAD_SHADOW_VCPU(r13) - PPC_STL r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13) + mfspr r13, SPRN_SPRG_THREAD + lwz r13, THREAD_KVM_SVCPU(r13) + /* PPC32 can have a NULL pointer - let's check for that */ + mtspr SPRN_SPRG_SCRATCH1, r12 /* Save r12 */ mfcr r12 - stw r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13) - lbz r12, (SHADOW_VCPU_OFF + SVCPU_IN_GUEST)(r13) + cmpwi r13, 0 + bne 1f +2: mtcr r12 + mfspr r12, SPRN_SPRG_SCRATCH1 + mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */ + b kvmppc_resume_\intno /* Get back original handler */ + +1: tophys(r13, r13) + stw r12, HSTATE_SCRATCH1(r13) + mfspr r12, SPRN_SPRG_SCRATCH1 + stw r12, HSTATE_SCRATCH0(r13) + lbz r12, HSTATE_IN_GUEST(r13) cmpwi r12, KVM_GUEST_MODE_NONE bne ..kvmppc_handler_hasmagic_\intno /* No KVM guest? Then jump back to the Linux handler! */ - lwz r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13) - mtcr r12 - PPC_LL r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13) - GET_SCRATCH0(r13) /* r13 = original r13 */ - b kvmppc_resume_\intno /* Get back original handler */ + lwz r12, HSTATE_SCRATCH1(r13) + b 2b /* Now we know we're handling a KVM guest */ ..kvmppc_handler_hasmagic_\intno: @@ -112,9 +124,6 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL -#ifdef CONFIG_PPC_BOOK3S_64 -INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL_HV -#endif INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL @@ -124,14 +133,6 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC -/* Those are only available on 64 bit machines */ - -#ifdef CONFIG_PPC_BOOK3S_64 -INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_SEGMENT -INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_SEGMENT -INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX -#endif - /* * Bring us back to the faulting code, but skip the * faulting instruction. @@ -143,8 +144,8 @@ INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX * * R12 = free * R13 = Shadow VCPU (PACA) - * SVCPU.SCRATCH0 = guest R12 - * SVCPU.SCRATCH1 = guest CR + * HSTATE.SCRATCH0 = guest R12 + * HSTATE.SCRATCH1 = guest CR * SPRG_SCRATCH0 = guest R13 * */ @@ -156,13 +157,14 @@ kvmppc_handler_skip_ins: mtsrr0 r12 /* Clean up all state */ - lwz r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13) + lwz r12, HSTATE_SCRATCH1(r13) mtcr r12 - PPC_LL r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13) + PPC_LL r12, HSTATE_SCRATCH0(r13) GET_SCRATCH0(r13) /* And get back into the code */ RFI +#endif /* * This trampoline brings us back to a real mode handler @@ -251,12 +253,4 @@ define_load_up(altivec) define_load_up(vsx) #endif -.global kvmppc_trampoline_lowmem -kvmppc_trampoline_lowmem: - PPC_LONG kvmppc_handler_lowmem_trampoline - CONFIG_KERNEL_START - -.global kvmppc_trampoline_enter -kvmppc_trampoline_enter: - PPC_LONG kvmppc_handler_trampoline_enter - CONFIG_KERNEL_START - #include "book3s_segment.S" |