diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 85 |
1 files changed, 59 insertions, 26 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 668f19aee6c..e5ca72a5cdb 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1447,6 +1447,29 @@ static void pvclock_update_vm_gtod_copy(struct kvm *kvm) #endif } +static void kvm_gen_update_masterclock(struct kvm *kvm) +{ +#ifdef CONFIG_X86_64 + int i; + struct kvm_vcpu *vcpu; + struct kvm_arch *ka = &kvm->arch; + + spin_lock(&ka->pvclock_gtod_sync_lock); + kvm_make_mclock_inprogress_request(kvm); + /* no guest entries from this point */ + pvclock_update_vm_gtod_copy(kvm); + + kvm_for_each_vcpu(i, vcpu, kvm) + set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); + + /* guest entries allowed */ + kvm_for_each_vcpu(i, vcpu, kvm) + clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); + + spin_unlock(&ka->pvclock_gtod_sync_lock); +#endif +} + static int kvm_guest_time_update(struct kvm_vcpu *v) { unsigned long flags, this_tsc_khz; @@ -3796,6 +3819,7 @@ long kvm_arch_vm_ioctl(struct file *filp, delta = user_ns.clock - now_ns; local_irq_enable(); kvm->arch.kvmclock_offset = delta; + kvm_gen_update_masterclock(kvm); break; } case KVM_GET_CLOCK: { @@ -5122,9 +5146,10 @@ restart: inject_emulated_exception(vcpu); r = EMULATE_DONE; } else if (vcpu->arch.pio.count) { - if (!vcpu->arch.pio.in) + if (!vcpu->arch.pio.in) { + /* FIXME: return into emulator if single-stepping. */ vcpu->arch.pio.count = 0; - else { + } else { writeback = false; vcpu->arch.complete_userspace_io = complete_emulated_pio; } @@ -5588,6 +5613,23 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu) return 1; } +/* + * kvm_pv_kick_cpu_op: Kick a vcpu. + * + * @apicid - apicid of vcpu to be kicked. + */ +static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid) +{ + struct kvm_lapic_irq lapic_irq; + + lapic_irq.shorthand = 0; + lapic_irq.dest_mode = 0; + lapic_irq.dest_id = apicid; + + lapic_irq.delivery_mode = APIC_DM_REMRD; + kvm_irq_delivery_to_apic(kvm, 0, &lapic_irq, NULL); +} + int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) { unsigned long nr, a0, a1, a2, a3, ret; @@ -5621,6 +5663,10 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) case KVM_HC_VAPIC_POLL_IRQ: ret = 0; break; + case KVM_HC_KICK_CPU: + kvm_pv_kick_cpu_op(vcpu->kvm, a0, a1); + ret = 0; + break; default: ret = -KVM_ENOSYS; break; @@ -5782,29 +5828,6 @@ static void process_nmi(struct kvm_vcpu *vcpu) kvm_make_request(KVM_REQ_EVENT, vcpu); } -static void kvm_gen_update_masterclock(struct kvm *kvm) -{ -#ifdef CONFIG_X86_64 - int i; - struct kvm_vcpu *vcpu; - struct kvm_arch *ka = &kvm->arch; - - spin_lock(&ka->pvclock_gtod_sync_lock); - kvm_make_mclock_inprogress_request(kvm); - /* no guest entries from this point */ - pvclock_update_vm_gtod_copy(kvm); - - kvm_for_each_vcpu(i, vcpu, kvm) - set_bit(KVM_REQ_CLOCK_UPDATE, &vcpu->requests); - - /* guest entries allowed */ - kvm_for_each_vcpu(i, vcpu, kvm) - clear_bit(KVM_REQ_MCLOCK_INPROGRESS, &vcpu->requests); - - spin_unlock(&ka->pvclock_gtod_sync_lock); -#endif -} - static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu) { u64 eoi_exit_bitmap[4]; @@ -6043,6 +6066,7 @@ static int __vcpu_run(struct kvm_vcpu *vcpu) kvm_apic_accept_events(vcpu); switch(vcpu->arch.mp_state) { case KVM_MP_STATE_HALTED: + vcpu->arch.pv.pv_unhalted = false; vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; case KVM_MP_STATE_RUNNABLE: @@ -6154,6 +6178,8 @@ static int complete_emulated_mmio(struct kvm_vcpu *vcpu) if (vcpu->mmio_cur_fragment == vcpu->mmio_nr_fragments) { vcpu->mmio_needed = 0; + + /* FIXME: return into emulator if single-stepping. */ if (vcpu->mmio_is_write) return 1; vcpu->mmio_read_completed = 1; @@ -6342,7 +6368,12 @@ int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, struct kvm_mp_state *mp_state) { kvm_apic_accept_events(vcpu); - mp_state->mp_state = vcpu->arch.mp_state; + if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED && + vcpu->arch.pv.pv_unhalted) + mp_state->mp_state = KVM_MP_STATE_RUNNABLE; + else + mp_state->mp_state = vcpu->arch.mp_state; + return 0; } @@ -6863,6 +6894,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) BUG_ON(vcpu->kvm == NULL); kvm = vcpu->kvm; + vcpu->arch.pv.pv_unhalted = false; vcpu->arch.emulate_ctxt.ops = &emulate_ops; if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; @@ -7200,6 +7232,7 @@ int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) !vcpu->arch.apf.halted) || !list_empty_careful(&vcpu->async_pf.done) || kvm_apic_has_events(vcpu) + || vcpu->arch.pv.pv_unhalted || atomic_read(&vcpu->arch.nmi_queued) || (kvm_arch_interrupt_allowed(vcpu) && kvm_cpu_has_interrupt(vcpu)); |