diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_pr.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 130 |
1 files changed, 65 insertions, 65 deletions
diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 1482961ceb4d..d4dfc0ca2a44 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -902,6 +902,69 @@ static void kvmppc_clear_debug(struct kvm_vcpu *vcpu) } } +static int kvmppc_exit_pr_progint(struct kvm_run *run, struct kvm_vcpu *vcpu, + unsigned int exit_nr) +{ + enum emulation_result er; + ulong flags; + u32 last_inst; + int emul, r; + + /* + * shadow_srr1 only contains valid flags if we came here via a program + * exception. The other exceptions (emulation assist, FP unavailable, + * etc.) do not provide flags in SRR1, so use an illegal-instruction + * exception when injecting a program interrupt into the guest. + */ + if (exit_nr == BOOK3S_INTERRUPT_PROGRAM) + flags = vcpu->arch.shadow_srr1 & 0x1f0000ull; + else + flags = SRR1_PROGILL; + + emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); + if (emul != EMULATE_DONE) + return RESUME_GUEST; + + if (kvmppc_get_msr(vcpu) & MSR_PR) { +#ifdef EXIT_DEBUG + pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n", + kvmppc_get_pc(vcpu), last_inst); +#endif + if ((last_inst & 0xff0007ff) != (INS_DCBZ & 0xfffffff7)) { + kvmppc_core_queue_program(vcpu, flags); + return RESUME_GUEST; + } + } + + vcpu->stat.emulated_inst_exits++; + er = kvmppc_emulate_instruction(run, vcpu); + switch (er) { + case EMULATE_DONE: + r = RESUME_GUEST_NV; + break; + case EMULATE_AGAIN: + r = RESUME_GUEST; + break; + case EMULATE_FAIL: + pr_crit("%s: emulation at %lx failed (%08x)\n", + __func__, kvmppc_get_pc(vcpu), last_inst); + kvmppc_core_queue_program(vcpu, flags); + r = RESUME_GUEST; + break; + case EMULATE_DO_MMIO: + run->exit_reason = KVM_EXIT_MMIO; + r = RESUME_HOST_NV; + break; + case EMULATE_EXIT_USER: + r = RESUME_HOST_NV; + break; + default: + BUG(); + } + + return r; +} + int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu, unsigned int exit_nr) { @@ -1044,71 +1107,8 @@ int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu, break; case BOOK3S_INTERRUPT_PROGRAM: case BOOK3S_INTERRUPT_H_EMUL_ASSIST: - { - enum emulation_result er; - ulong flags; - u32 last_inst; - int emul; - -program_interrupt: - /* - * shadow_srr1 only contains valid flags if we came here via - * a program exception. The other exceptions (emulation assist, - * FP unavailable, etc.) do not provide flags in SRR1, so use - * an illegal-instruction exception when injecting a program - * interrupt into the guest. - */ - if (exit_nr == BOOK3S_INTERRUPT_PROGRAM) - flags = vcpu->arch.shadow_srr1 & 0x1f0000ull; - else - flags = SRR1_PROGILL; - - emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); - if (emul != EMULATE_DONE) { - r = RESUME_GUEST; - break; - } - - if (kvmppc_get_msr(vcpu) & MSR_PR) { -#ifdef EXIT_DEBUG - pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n", - kvmppc_get_pc(vcpu), last_inst); -#endif - if ((last_inst & 0xff0007ff) != - (INS_DCBZ & 0xfffffff7)) { - kvmppc_core_queue_program(vcpu, flags); - r = RESUME_GUEST; - break; - } - } - - vcpu->stat.emulated_inst_exits++; - er = kvmppc_emulate_instruction(run, vcpu); - switch (er) { - case EMULATE_DONE: - r = RESUME_GUEST_NV; - break; - case EMULATE_AGAIN: - r = RESUME_GUEST; - break; - case EMULATE_FAIL: - printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n", - __func__, kvmppc_get_pc(vcpu), last_inst); - kvmppc_core_queue_program(vcpu, flags); - r = RESUME_GUEST; - break; - case EMULATE_DO_MMIO: - run->exit_reason = KVM_EXIT_MMIO; - r = RESUME_HOST_NV; - break; - case EMULATE_EXIT_USER: - r = RESUME_HOST_NV; - break; - default: - BUG(); - } + r = kvmppc_exit_pr_progint(run, vcpu, exit_nr); break; - } case BOOK3S_INTERRUPT_SYSCALL: { u32 last_sc; @@ -1185,7 +1185,7 @@ program_interrupt: emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst); if (emul == EMULATE_DONE) - goto program_interrupt; + r = kvmppc_exit_pr_progint(run, vcpu, exit_nr); else r = RESUME_GUEST; |