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KVM: arm/arm64: Initialize the emulated EL1 physical timer 

Initialize the emulated EL1 physical timer with the default irq number.

Signed-off-by: Jintack Lim <jintack@cs.columbia.edu>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Jintack Lim 2017-02-03 10:20:03 -05:00 committed by Marc Zyngier
parent 009a5701bb
commit a91d18551e
4 changed files with 25 additions and 5 deletions
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9
arch/arm/kvm/reset.c
View File

@ -37,6 +37,11 @@ static struct kvm_regs cortexa_regs_reset = {
.usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT,
};
static const struct kvm_irq_level cortexa_ptimer_irq = {
{ .irq = 30 },
.level = 1,
};
static const struct kvm_irq_level cortexa_vtimer_irq = {
{ .irq = 27 },
.level = 1,
@ -58,6 +63,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
{
struct kvm_regs *reset_regs;
const struct kvm_irq_level *cpu_vtimer_irq;
const struct kvm_irq_level *cpu_ptimer_irq;
switch (vcpu->arch.target) {
case KVM_ARM_TARGET_CORTEX_A7:
@ -65,6 +71,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
reset_regs = &cortexa_regs_reset;
vcpu->arch.midr = read_cpuid_id();
cpu_vtimer_irq = &cortexa_vtimer_irq;
cpu_ptimer_irq = &cortexa_ptimer_irq;
break;
default:
return -ENODEV;
@ -77,5 +84,5 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
kvm_reset_coprocs(vcpu);
/* Reset arch_timer context */
return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq, cpu_ptimer_irq);
}

9
arch/arm64/kvm/reset.c
View File

@ -46,6 +46,11 @@ static const struct kvm_regs default_regs_reset32 = {
COMPAT_PSR_I_BIT | COMPAT_PSR_F_BIT),
};
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,
@ -104,6 +109,7 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
{
const struct kvm_irq_level *cpu_vtimer_irq;
const struct kvm_irq_level *cpu_ptimer_irq;
const struct kvm_regs *cpu_reset;
switch (vcpu->arch.target) {
@ -117,6 +123,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
}
cpu_vtimer_irq = &default_vtimer_irq;
cpu_ptimer_irq = &default_ptimer_irq;
break;
}
@ -130,5 +137,5 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
kvm_pmu_vcpu_reset(vcpu);
/* Reset timer */
return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq, cpu_ptimer_irq);
}

3
include/kvm/arm_arch_timer.h
View File

@ -58,7 +58,8 @@ struct arch_timer_cpu {
int kvm_timer_hyp_init(void);
int kvm_timer_enable(struct kvm_vcpu *vcpu);
int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
const struct kvm_irq_level *irq);
const struct kvm_irq_level *virt_irq,
const struct kvm_irq_level *phys_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);

9
virt/kvm/arm/arch_timer.c
View File

@ -327,9 +327,11 @@ void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu)
}
int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
const struct kvm_irq_level *irq)
const struct kvm_irq_level *virt_irq,
const struct kvm_irq_level *phys_irq)
{
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
@ -337,7 +339,8 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
* kvm_vcpu_set_target(). To handle this, we determine
* vcpu timer irq number when the vcpu is reset.
*/
vtimer->irq.irq = irq->irq;
vtimer->irq.irq = virt_irq->irq;
ptimer->irq.irq = phys_irq->irq;
/*
* The bits in CNTV_CTL are architecturally reset to UNKNOWN for ARMv8
@ -346,6 +349,7 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
* the ARMv7 architecture.
*/
vtimer->cnt_ctl = 0;
ptimer->cnt_ctl = 0;
kvm_timer_update_state(vcpu);
return 0;
@ -376,6 +380,7 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
/* Synchronize cntvoff across all vtimers of a VM. */
update_vtimer_cntvoff(vcpu, kvm_phys_timer_read());
vcpu_ptimer(vcpu)->cntvoff = 0;
INIT_WORK(&timer->expired, kvm_timer_inject_irq_work);
hrtimer_init(&timer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);