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authorChristoffer Dall <cdall@linaro.org>2017-05-02 20:14:06 +0200
committerChristoffer Dall <cdall@linaro.org>2017-06-08 16:59:56 +0200
commit85e69ad7f2cc6dd829987a70cf32785b1d8c8b27 (patch)
tree42a5464cd25063efd56d1493bc544c860309a754 /virt
parent3cba4af31c61fc9420fdcf083f509a6c20a6d8e5 (diff)
downloadlinux-85e69ad7f2cc6dd829987a70cf32785b1d8c8b27.tar.bz2
KVM: arm/arm64: Move timer IRQ default init to arch_timer.c
We currently initialize the arch timer IRQ numbers from the reset code, presumably because we once intended to model multiple CPU or SoC types from within the kernel and have hard-coded reset values in the reset code. As we are moving towards userspace being in charge of more fine-grained CPU emulation and stitching together the pieces needed to emulate a particular type of CPU, we should no longer have a tight coupling between resetting a VCPU and setting IRQ numbers. Therefore, move the logic to define and use the default IRQ numbers to the timer code and set the IRQ number immediately when creating the VCPU. Signed-off-by: Christoffer Dall <cdall@linaro.org> Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/arch_timer.c28
1 files changed, 16 insertions, 12 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c
index 7933b1f8f7b7..72d5aa7d4c64 100644
--- a/virt/kvm/arm/arch_timer.c
+++ b/virt/kvm/arm/arch_timer.c
@@ -35,6 +35,16 @@ static struct timecounter *timecounter;
static unsigned int host_vtimer_irq;
static u32 host_vtimer_irq_flags;
+static const struct kvm_irq_level default_ptimer_irq = {
+ .irq = 30,
+ .level = 1,
+};
+
+static const struct kvm_irq_level default_vtimer_irq = {
+ .irq = 27,
+ .level = 1,
+};
+
void kvm_timer_vcpu_put(struct kvm_vcpu *vcpu)
{
vcpu_vtimer(vcpu)->active_cleared_last = false;
@@ -445,23 +455,12 @@ void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu)
kvm_timer_update_state(vcpu);
}
-int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
- const struct kvm_irq_level *virt_irq,
- const struct kvm_irq_level *phys_irq)
+int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu)
{
struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
/*
- * 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.
- */
- vtimer->irq.irq = virt_irq->irq;
- ptimer->irq.irq = phys_irq->irq;
-
- /*
* The bits in CNTV_CTL are architecturally reset to UNKNOWN for ARMv8
* and to 0 for ARMv7. We provide an implementation that always
* resets the timer to be disabled and unmasked and is compliant with
@@ -496,6 +495,8 @@ static void update_vtimer_cntvoff(struct kvm_vcpu *vcpu, u64 cntvoff)
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
{
struct arch_timer_cpu *timer = &vcpu->arch.timer_cpu;
+ struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
+ struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
/* Synchronize cntvoff across all vtimers of a VM. */
update_vtimer_cntvoff(vcpu, kvm_phys_timer_read());
@@ -504,6 +505,9 @@ 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;
+
+ vtimer->irq.irq = default_vtimer_irq.irq;
+ ptimer->irq.irq = default_ptimer_irq.irq;
}
static void kvm_timer_init_interrupt(void *info)