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-rw-r--r--arch/arm/kvm/reset.c12
-rw-r--r--include/kvm/arm_arch_timer.h4
-rw-r--r--virt/kvm/arm/arch_timer.c29
3 files changed, 36 insertions, 9 deletions
diff --git a/arch/arm/kvm/reset.c b/arch/arm/kvm/reset.c
index b80256b..b7840e7 100644
--- a/arch/arm/kvm/reset.c
+++ b/arch/arm/kvm/reset.c
@@ -27,6 +27,8 @@
#include <asm/kvm_arm.h>
#include <asm/kvm_coproc.h>
+#include <kvm/arm_arch_timer.h>
+
/******************************************************************************
* Cortex-A15 Reset Values
*/
@@ -37,6 +39,11 @@ static struct kvm_regs a15_regs_reset = {
.usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT,
};
+static const struct kvm_irq_level a15_vtimer_irq = {
+ .irq = 27,
+ .level = 1,
+};
+
/*******************************************************************************
* Exported reset function
@@ -52,6 +59,7 @@ static struct kvm_regs a15_regs_reset = {
int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
{
struct kvm_regs *cpu_reset;
+ const struct kvm_irq_level *cpu_vtimer_irq;
switch (vcpu->arch.target) {
case KVM_ARM_TARGET_CORTEX_A15:
@@ -59,6 +67,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
return -EINVAL;
cpu_reset = &a15_regs_reset;
vcpu->arch.midr = read_cpuid_id();
+ cpu_vtimer_irq = &a15_vtimer_irq;
break;
default:
return -ENODEV;
@@ -70,5 +79,8 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
/* Reset CP15 registers */
kvm_reset_coprocs(vcpu);
+ /* Reset arch_timer context */
+ kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
+
return 0;
}
diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h
index 68cb9e1..6d9aedd 100644
--- a/include/kvm/arm_arch_timer.h
+++ b/include/kvm/arm_arch_timer.h
@@ -61,6 +61,8 @@ struct arch_timer_cpu {
#ifdef CONFIG_KVM_ARM_TIMER
int kvm_timer_hyp_init(void);
int kvm_timer_init(struct kvm *kvm);
+void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
+ const struct kvm_irq_level *irq);
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
@@ -76,6 +78,8 @@ static inline int kvm_timer_init(struct kvm *kvm)
return 0;
}
+static inline void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
+ const struct kvm_irq_level *irq) {}
static inline void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu) {}
static inline void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu) {}
static inline void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu) {}
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 2d00b29..af4583e 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -30,9 +30,7 @@
static struct timecounter *timecounter;
static struct workqueue_struct *wqueue;
-static struct kvm_irq_level timer_irq = {
- .level = 1,
-};
+static unsigned int host_vtimer_irq;
static cycle_t kvm_phys_timer_read(void)
{
@@ -67,8 +65,8 @@ static void kvm_timer_inject_irq(struct kvm_vcpu *vcpu)
timer->cntv_ctl |= ARCH_TIMER_CTRL_IT_MASK;
kvm_vgic_inject_irq(vcpu->kvm, vcpu->vcpu_id,
- vcpu->arch.timer_cpu.irq->irq,
- vcpu->arch.timer_cpu.irq->level);
+ timer->irq->irq,
+ timer->irq->level);
}
static irqreturn_t kvm_arch_timer_handler(int irq, void *dev_id)
@@ -156,6 +154,20 @@ void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu)
timer_arm(timer, ns);
}
+void kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
+ const struct kvm_irq_level *irq)
+{
+ struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
+
+ /*
+ * The vcpu timer irq number cannot be determined in
+ * kvm_timer_vcpu_init() because it is called much before
+ * kvm_vcpu_set_target(). To handle this, we determine
+ * vcpu timer irq number when the vcpu is reset.
+ */
+ timer->irq = irq;
+}
+
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
{
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
@@ -163,12 +175,11 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
INIT_WORK(&timer->expired, kvm_timer_inject_irq_work);
hrtimer_init(&timer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
timer->timer.function = kvm_timer_expire;
- timer->irq = &timer_irq;
}
static void kvm_timer_init_interrupt(void *info)
{
- enable_percpu_irq(timer_irq.irq, 0);
+ enable_percpu_irq(host_vtimer_irq, 0);
}
@@ -182,7 +193,7 @@ static int kvm_timer_cpu_notify(struct notifier_block *self,
break;
case CPU_DYING:
case CPU_DYING_FROZEN:
- disable_percpu_irq(timer_irq.irq);
+ disable_percpu_irq(host_vtimer_irq);
break;
}
@@ -229,7 +240,7 @@ int kvm_timer_hyp_init(void)
goto out;
}
- timer_irq.irq = ppi;
+ host_vtimer_irq = ppi;
err = register_cpu_notifier(&kvm_timer_cpu_nb);
if (err) {
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