diff options
| -rw-r--r-- | arch/arm/kvm/arm.c | 6 | ||||
| -rw-r--r-- | include/kvm/arm_arch_timer.h | 8 | ||||
| -rw-r--r-- | virt/kvm/arm/arch_timer.c | 66 | ||||
| -rw-r--r-- | virt/kvm/arm/hyp/timer-sr.c | 5 |
4 files changed, 47 insertions, 38 deletions
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c index be4b6394a062..ceb9345bcf07 100644 --- a/arch/arm/kvm/arm.c +++ b/arch/arm/kvm/arm.c @@ -459,7 +459,7 @@ static void update_vttbr(struct kvm *kvm) static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) { struct kvm *kvm = vcpu->kvm; - int ret; + int ret = 0; if (likely(vcpu->arch.has_run_once)) return 0; @@ -482,9 +482,9 @@ static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) * interrupts from the virtual timer with a userspace gic. */ if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) - kvm_timer_enable(kvm); + ret = kvm_timer_enable(vcpu); - return 0; + return ret; } bool kvm_arch_intc_initialized(struct kvm *kvm) diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h index a47b7dee434d..dda39d8fa189 100644 --- a/include/kvm/arm_arch_timer.h +++ b/include/kvm/arm_arch_timer.h @@ -24,9 +24,6 @@ #include <linux/workqueue.h> struct arch_timer_kvm { - /* Is the timer enabled */ - bool enabled; - /* Virtual offset */ cycle_t cntvoff; }; @@ -55,10 +52,13 @@ struct arch_timer_cpu { /* Active IRQ state caching */ bool active_cleared_last; + + /* Is the timer enabled */ + bool enabled; }; int kvm_timer_hyp_init(void); -void kvm_timer_enable(struct kvm *kvm); +int kvm_timer_enable(struct kvm_vcpu *vcpu); void kvm_timer_init(struct kvm *kvm); int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, const struct kvm_irq_level *irq); diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index 3232105e6afd..e2d5b6f988fb 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -197,7 +197,7 @@ static int kvm_timer_update_state(struct kvm_vcpu *vcpu) * because the guest would never see the interrupt. Instead wait * until we call this function from kvm_timer_flush_hwstate. */ - if (!vgic_initialized(vcpu->kvm)) + if (!vgic_initialized(vcpu->kvm) || !timer->enabled) return -ENODEV; if (kvm_timer_should_fire(vcpu) != timer->irq.level) @@ -333,9 +333,6 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, const struct kvm_irq_level *irq) { struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; - struct irq_desc *desc; - struct irq_data *data; - int phys_irq; /* * The vcpu timer irq number cannot be determined in @@ -354,26 +351,7 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu, timer->cntv_ctl = 0; kvm_timer_update_state(vcpu); - /* - * Find the physical IRQ number corresponding to the host_vtimer_irq - */ - desc = irq_to_desc(host_vtimer_irq); - if (!desc) { - kvm_err("%s: no interrupt descriptor\n", __func__); - return -EINVAL; - } - - data = irq_desc_get_irq_data(desc); - while (data->parent_data) - data = data->parent_data; - - phys_irq = data->hwirq; - - /* - * Tell the VGIC that the virtual interrupt is tied to a - * physical interrupt. We do that once per VCPU. - */ - return kvm_vgic_map_phys_irq(vcpu, irq->irq, phys_irq); + return 0; } void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) @@ -501,10 +479,40 @@ void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) kvm_vgic_unmap_phys_irq(vcpu, timer->irq.irq); } -void kvm_timer_enable(struct kvm *kvm) +int kvm_timer_enable(struct kvm_vcpu *vcpu) { - if (kvm->arch.timer.enabled) - return; + struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; + struct irq_desc *desc; + struct irq_data *data; + int phys_irq; + int ret; + + if (timer->enabled) + return 0; + + /* + * Find the physical IRQ number corresponding to the host_vtimer_irq + */ + desc = irq_to_desc(host_vtimer_irq); + if (!desc) { + kvm_err("%s: no interrupt descriptor\n", __func__); + return -EINVAL; + } + + data = irq_desc_get_irq_data(desc); + while (data->parent_data) + data = data->parent_data; + + phys_irq = data->hwirq; + + /* + * Tell the VGIC that the virtual interrupt is tied to a + * physical interrupt. We do that once per VCPU. + */ + ret = kvm_vgic_map_phys_irq(vcpu, timer->irq.irq, phys_irq); + if (ret) + return ret; + /* * There is a potential race here between VCPUs starting for the first @@ -515,7 +523,9 @@ void kvm_timer_enable(struct kvm *kvm) * the arch timers are enabled. */ if (timecounter && wqueue) - kvm->arch.timer.enabled = 1; + timer->enabled = 1; + + return 0; } void kvm_timer_init(struct kvm *kvm) diff --git a/virt/kvm/arm/hyp/timer-sr.c b/virt/kvm/arm/hyp/timer-sr.c index ea00d69e7078..798866a8d875 100644 --- a/virt/kvm/arm/hyp/timer-sr.c +++ b/virt/kvm/arm/hyp/timer-sr.c @@ -24,11 +24,10 @@ /* vcpu is already in the HYP VA space */ void __hyp_text __timer_save_state(struct kvm_vcpu *vcpu) { - struct kvm *kvm = kern_hyp_va(vcpu->kvm); struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu; u64 val; - if (kvm->arch.timer.enabled) { + if (timer->enabled) { timer->cntv_ctl = read_sysreg_el0(cntv_ctl); timer->cntv_cval = read_sysreg_el0(cntv_cval); } @@ -60,7 +59,7 @@ void __hyp_text __timer_restore_state(struct kvm_vcpu *vcpu) val |= CNTHCTL_EL1PCTEN; write_sysreg(val, cnthctl_el2); - if (kvm->arch.timer.enabled) { + if (timer->enabled) { write_sysreg(kvm->arch.timer.cntvoff, cntvoff_el2); write_sysreg_el0(timer->cntv_cval, cntv_cval); isb(); |