diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 22 | ||||
| -rw-r--r-- | arch/powerpc/kvm/booke.c | 58 | ||||
| -rw-r--r-- | arch/powerpc/kvm/powerpc.c | 57 |
4 files changed, 67 insertions, 73 deletions
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 88de3146838b..59b7c87e47f7 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -112,6 +112,7 @@ extern int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong val); extern int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *val); +extern void kvmppc_core_check_requests(struct kvm_vcpu *vcpu); extern int kvmppc_booke_init(void); extern void kvmppc_booke_exit(void); @@ -150,6 +151,8 @@ extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, extern int kvmppc_bookehv_init(void); extern void kvmppc_bookehv_exit(void); +extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu); + /* * Cuts out inst bits with ordering according to spec. * That means the leftmost bit is zero. All given bits are included. diff --git a/arch/powerpc/kvm/book3s_pr.c b/arch/powerpc/kvm/book3s_pr.c index 7f0fe6f9e297..cae2defd1462 100644 --- a/arch/powerpc/kvm/book3s_pr.c +++ b/arch/powerpc/kvm/book3s_pr.c @@ -88,6 +88,10 @@ void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) kvmppc_giveup_ext(vcpu, MSR_VSX); } +void kvmppc_core_check_requests(struct kvm_vcpu *vcpu) +{ +} + static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu) { ulong smsr = vcpu->arch.shared->msr; @@ -815,19 +819,9 @@ program_interrupt: * again due to a host external interrupt. */ __hard_irq_disable(); - if (signal_pending(current)) { - __hard_irq_enable(); -#ifdef EXIT_DEBUG - printk(KERN_EMERG "KVM: Going back to host\n"); -#endif - vcpu->stat.signal_exits++; + if (kvmppc_prepare_to_enter(vcpu)) { run->exit_reason = KVM_EXIT_INTR; r = -EINTR; - } else { - /* In case an interrupt came in that was triggered - * from userspace (like DEC), we need to check what - * to inject now! */ - kvmppc_core_prepare_to_enter(vcpu); } } @@ -1029,8 +1023,6 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) goto out; } - kvmppc_core_prepare_to_enter(vcpu); - /* * Interrupts could be timers for the guest which we have to inject * again, so let's postpone them until we're in the guest and if we @@ -1038,9 +1030,7 @@ int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) * a host external interrupt. */ __hard_irq_disable(); - - /* No need to go into the guest when all we do is going out */ - if (signal_pending(current)) { + if (kvmppc_prepare_to_enter(vcpu)) { __hard_irq_enable(); kvm_run->exit_reason = KVM_EXIT_INTR; ret = -EINTR; diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c index 683cbd686d01..4652e0bfa781 100644 --- a/arch/powerpc/kvm/booke.c +++ b/arch/powerpc/kvm/booke.c @@ -455,10 +455,8 @@ int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) return r; } -static void kvmppc_check_requests(struct kvm_vcpu *vcpu) +void kvmppc_core_check_requests(struct kvm_vcpu *vcpu) { - trace_kvm_check_requests(vcpu); - if (kvm_check_request(KVM_REQ_PENDING_TIMER, vcpu)) update_timer_ints(vcpu); #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) @@ -467,60 +465,6 @@ static void kvmppc_check_requests(struct kvm_vcpu *vcpu) #endif } -/* - * Common checks before entering the guest world. Call with interrupts - * disabled. - * - * returns !0 if a signal is pending and check_signal is true - */ -static int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) -{ - int r = 0; - - WARN_ON_ONCE(!irqs_disabled()); - while (true) { - if (need_resched()) { - local_irq_enable(); - cond_resched(); - local_irq_disable(); - continue; - } - - if (signal_pending(current)) { - r = 1; - break; - } - - smp_mb(); - if (vcpu->requests) { - /* Make sure we process requests preemptable */ - local_irq_enable(); - kvmppc_check_requests(vcpu); - local_irq_disable(); - continue; - } - - if (kvmppc_core_prepare_to_enter(vcpu)) { - /* interrupts got enabled in between, so we - are back at square 1 */ - continue; - } - - if (vcpu->mode == EXITING_GUEST_MODE) { - r = 1; - break; - } - - /* Going into guest context! Yay! */ - vcpu->mode = IN_GUEST_MODE; - smp_wmb(); - - break; - } - - return r; -} - int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu) { int ret; diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c index 45fe433316ea..153a26abc915 100644 --- a/arch/powerpc/kvm/powerpc.c +++ b/arch/powerpc/kvm/powerpc.c @@ -47,6 +47,63 @@ int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) return 1; } +#ifndef CONFIG_KVM_BOOK3S_64_HV +/* + * Common checks before entering the guest world. Call with interrupts + * disabled. + * + * returns !0 if a signal is pending and check_signal is true + */ +int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) +{ + int r = 0; + + WARN_ON_ONCE(!irqs_disabled()); + while (true) { + if (need_resched()) { + local_irq_enable(); + cond_resched(); + local_irq_disable(); + continue; + } + + if (signal_pending(current)) { + r = 1; + break; + } + + smp_mb(); + if (vcpu->requests) { + /* Make sure we process requests preemptable */ + local_irq_enable(); + trace_kvm_check_requests(vcpu); + kvmppc_core_check_requests(vcpu); + local_irq_disable(); + continue; + } + + if (kvmppc_core_prepare_to_enter(vcpu)) { + /* interrupts got enabled in between, so we + are back at square 1 */ + continue; + } + + if (vcpu->mode == EXITING_GUEST_MODE) { + r = 1; + break; + } + + /* Going into guest context! Yay! */ + vcpu->mode = IN_GUEST_MODE; + smp_wmb(); + + break; + } + + return r; +} +#endif /* CONFIG_KVM_BOOK3S_64_HV */ + int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) { int nr = kvmppc_get_gpr(vcpu, 11); |