diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_rmhandlers.S | 78 |
1 files changed, 41 insertions, 37 deletions
diff --git a/arch/powerpc/kvm/book3s_rmhandlers.S b/arch/powerpc/kvm/book3s_rmhandlers.S index 5f5d074..dd03689 100644 --- a/arch/powerpc/kvm/book3s_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_rmhandlers.S @@ -40,37 +40,42 @@ #define MSR_NOIRQ MSR_KERNEL & ~(MSR_IR | MSR_DR) #define FUNC(name) GLUE(.,name) -#elif defined(CONFIG_PPC_BOOK3S_32) +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 . -#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) +#elif defined(CONFIG_PPC_BOOK3S_32) #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 +83,28 @@ 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 + 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, (SHADOW_VCPU_OFF + SVCPU_SCRATCH1)(r13) + mfspr r12, SPRN_SPRG_SCRATCH1 + stw r12, (SHADOW_VCPU_OFF + SVCPU_SCRATCH0)(r13) lbz r12, (SHADOW_VCPU_OFF + SVCPU_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 */ + b 2b /* Now we know we're handling a KVM guest */ ..kvmppc_handler_hasmagic_\intno: @@ -112,9 +126,6 @@ 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 +135,6 @@ 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. @@ -163,6 +166,7 @@ kvmppc_handler_skip_ins: /* And get back into the code */ RFI +#endif /* * This trampoline brings us back to a real mode handler |