diff options
| -rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 4 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 32 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s.c | 32 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_hv.c | 14 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 6 | ||||
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/bookehv_interrupts.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/kvm/e500_mmu_host.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kvm/emulate.c | 4 | ||||
| -rw-r--r-- | arch/powerpc/kvm/emulate_loadstore.c | 2 |
11 files changed, 78 insertions, 26 deletions
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 959f566a455c..14ee0dece853 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -758,7 +758,7 @@ struct kvm_vcpu_arch { u8 prodded; u8 doorbell_request; u8 irq_pending; /* Used by XIVE to signal pending guest irqs */ - u32 last_inst; + unsigned long last_inst; struct rcuwait wait; struct rcuwait *waitp; @@ -818,7 +818,7 @@ struct kvm_vcpu_arch { u64 busy_stolen; u64 busy_preempt; - u32 emul_inst; + u64 emul_inst; u32 online; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index d703d1b3ba7e..bc57d058ad5b 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -85,7 +85,8 @@ extern int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu, int is_default_endian); extern int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, - enum instruction_fetch_type type, u32 *inst); + enum instruction_fetch_type type, + unsigned long *inst); extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data); @@ -336,15 +337,30 @@ static inline int kvmppc_get_last_inst(struct kvm_vcpu *vcpu, ret = kvmppc_load_last_inst(vcpu, type, &vcpu->arch.last_inst); /* Write fetch_failed unswapped if the fetch failed */ - if (ret == EMULATE_DONE) - fetched_inst = kvmppc_need_byteswap(vcpu) ? - swab32(vcpu->arch.last_inst) : - vcpu->arch.last_inst; - else - fetched_inst = vcpu->arch.last_inst; + if (ret != EMULATE_DONE) { + *inst = ppc_inst(KVM_INST_FETCH_FAILED); + return ret; + } + +#ifdef CONFIG_PPC64 + /* Is this a prefixed instruction? */ + if ((vcpu->arch.last_inst >> 32) != 0) { + u32 prefix = vcpu->arch.last_inst >> 32; + u32 suffix = vcpu->arch.last_inst; + if (kvmppc_need_byteswap(vcpu)) { + prefix = swab32(prefix); + suffix = swab32(suffix); + } + *inst = ppc_inst_prefix(prefix, suffix); + return EMULATE_DONE; + } +#endif + fetched_inst = kvmppc_need_byteswap(vcpu) ? + swab32(vcpu->arch.last_inst) : + vcpu->arch.last_inst; *inst = ppc_inst(fetched_inst); - return ret; + return EMULATE_DONE; } static inline bool is_kvmppc_hv_enabled(struct kvm *kvm) diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c index fa6ac24f3280..686d8d9eda3e 100644 --- a/arch/powerpc/kvm/book3s.c +++ b/arch/powerpc/kvm/book3s.c @@ -481,20 +481,42 @@ int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid, return r; } +/* + * Returns prefixed instructions with the prefix in the high 32 bits + * of *inst and suffix in the low 32 bits. This is the same convention + * as used in HEIR, vcpu->arch.last_inst and vcpu->arch.emul_inst. + * Like vcpu->arch.last_inst but unlike vcpu->arch.emul_inst, each + * half of the value needs byte-swapping if the guest endianness is + * different from the host endianness. + */ int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, - enum instruction_fetch_type type, u32 *inst) + enum instruction_fetch_type type, unsigned long *inst) { ulong pc = kvmppc_get_pc(vcpu); int r; + u32 iw; if (type == INST_SC) pc -= 4; - r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false); - if (r == EMULATE_DONE) - return r; - else + r = kvmppc_ld(vcpu, &pc, sizeof(u32), &iw, false); + if (r != EMULATE_DONE) return EMULATE_AGAIN; + /* + * If [H]SRR1 indicates that the instruction that caused the + * current interrupt is a prefixed instruction, get the suffix. + */ + if (kvmppc_get_msr(vcpu) & SRR1_PREFIXED) { + u32 suffix; + pc += 4; + r = kvmppc_ld(vcpu, &pc, sizeof(u32), &suffix, false); + if (r != EMULATE_DONE) + return EMULATE_AGAIN; + *inst = ((u64)iw << 32) | suffix; + } else { + *inst = iw; + } + return r; } EXPORT_SYMBOL_GPL(kvmppc_load_last_inst); diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index 0be313e71615..af1f060533f2 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -433,6 +433,7 @@ int kvmppc_hv_emulate_mmio(struct kvm_vcpu *vcpu, unsigned long gpa, gva_t ea, int is_store) { ppc_inst_t last_inst; + bool is_prefixed = !!(kvmppc_get_msr(vcpu) & SRR1_PREFIXED); /* * Fast path - check if the guest physical address corresponds to a @@ -447,7 +448,7 @@ int kvmppc_hv_emulate_mmio(struct kvm_vcpu *vcpu, NULL); srcu_read_unlock(&vcpu->kvm->srcu, idx); if (!ret) { - kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); + kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + (is_prefixed ? 8 : 4)); return RESUME_GUEST; } } @@ -462,7 +463,16 @@ int kvmppc_hv_emulate_mmio(struct kvm_vcpu *vcpu, /* * WARNING: We do not know for sure whether the instruction we just * read from memory is the same that caused the fault in the first - * place. If the instruction we read is neither an load or a store, + * place. + * + * If the fault is prefixed but the instruction is not or vice + * versa, try again so that we don't advance pc the wrong amount. + */ + if (ppc_inst_prefixed(last_inst) != is_prefixed) + return RESUME_GUEST; + + /* + * If the instruction we read is neither an load or a store, * then it can't access memory, so we don't need to worry about * enforcing access permissions. So, assuming it is a load or * store, we just check that its direction (load or store) is diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 6a573bcad8b8..283b9bcb014c 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -474,7 +474,7 @@ static void kvmppc_dump_regs(struct kvm_vcpu *vcpu) for (r = 0; r < vcpu->arch.slb_max; ++r) pr_err(" ESID = %.16llx VSID = %.16llx\n", vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv); - pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n", + pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.16lx\n", vcpu->arch.vcore->lpcr, vcpu->kvm->arch.sdr1, vcpu->arch.last_inst); } diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 0a9781192b86..800892dab48e 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -1071,11 +1071,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR) /* Save HEIR (HV emulation assist reg) in emul_inst if this is an HEI (HV emulation interrupt, e40) */ li r3,KVM_INST_FETCH_FAILED - stw r3,VCPU_LAST_INST(r9) + std r3,VCPU_LAST_INST(r9) cmpwi r12,BOOK3S_INTERRUPT_H_EMUL_ASSIST bne 11f mfspr r3,SPRN_HEIR -11: stw r3,VCPU_HEIR(r9) +11: std r3,VCPU_HEIR(r9) /* these are volatile across C function calls */ mfctr r3 @@ -1676,7 +1676,7 @@ fast_interrupt_c_return: mtmsrd r3 /* Store the result */ - stw r8, VCPU_LAST_INST(r9) + std r8, VCPU_LAST_INST(r9) /* Unset guest mode. */ li r0, KVM_GUEST_MODE_HOST_HV diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 7e1d9d7d659d..6a5be025a8af 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -844,7 +844,7 @@ static int emulation_exit(struct kvm_vcpu *vcpu) return RESUME_GUEST; case EMULATE_FAIL: - printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", + printk(KERN_CRIT "%s: emulation at %lx failed (%08lx)\n", __func__, vcpu->arch.regs.nip, vcpu->arch.last_inst); /* For debugging, encode the failing instruction and * report it to userspace. */ diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index b5fe6fb53c66..8b4a402217ba 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -139,7 +139,7 @@ END_BTB_FLUSH_SECTION * kvmppc_get_last_inst(). */ li r9, KVM_INST_FETCH_FAILED - stw r9, VCPU_LAST_INST(r4) + PPC_STL r9, VCPU_LAST_INST(r4) .endif .if \flags & NEED_ESR diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index 05668e964140..ccb8f16ffe41 100644 --- a/arch/powerpc/kvm/e500_mmu_host.c +++ b/arch/powerpc/kvm/e500_mmu_host.c @@ -623,7 +623,7 @@ void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 eaddr, gpa_t gpaddr, #ifdef CONFIG_KVM_BOOKE_HV int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, - enum instruction_fetch_type type, u32 *instr) + enum instruction_fetch_type type, unsigned long *instr) { gva_t geaddr; hpa_t addr; @@ -713,7 +713,7 @@ int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, } #else int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, - enum instruction_fetch_type type, u32 *instr) + enum instruction_fetch_type type, unsigned long *instr) { return EMULATE_AGAIN; } diff --git a/arch/powerpc/kvm/emulate.c b/arch/powerpc/kvm/emulate.c index 2a51d5baabf4..355d5206e8aa 100644 --- a/arch/powerpc/kvm/emulate.c +++ b/arch/powerpc/kvm/emulate.c @@ -301,6 +301,10 @@ int kvmppc_emulate_instruction(struct kvm_vcpu *vcpu) trace_kvm_ppc_instr(inst, kvmppc_get_pc(vcpu), emulated); /* Advance past emulated instruction. */ + /* + * If this ever handles prefixed instructions, the 4 + * will need to become ppc_inst_len(pinst) instead. + */ if (advance) kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); diff --git a/arch/powerpc/kvm/emulate_loadstore.c b/arch/powerpc/kvm/emulate_loadstore.c index 64b93eb1e457..059c08ae0340 100644 --- a/arch/powerpc/kvm/emulate_loadstore.c +++ b/arch/powerpc/kvm/emulate_loadstore.c @@ -360,7 +360,7 @@ int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu) /* Advance past emulated instruction. */ if (emulated != EMULATE_FAIL) - kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4); + kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + ppc_inst_len(inst)); return emulated; } |