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>
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@ -37,6 +37,11 @@ static struct kvm_regs cortexa_regs_reset = {
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.usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT,
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};
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static const struct kvm_irq_level cortexa_ptimer_irq = {
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{ .irq = 30 },
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.level = 1,
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};
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static const struct kvm_irq_level cortexa_vtimer_irq = {
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{ .irq = 27 },
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.level = 1,
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@ -58,6 +63,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
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{
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struct kvm_regs *reset_regs;
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const struct kvm_irq_level *cpu_vtimer_irq;
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const struct kvm_irq_level *cpu_ptimer_irq;
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switch (vcpu->arch.target) {
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case KVM_ARM_TARGET_CORTEX_A7:
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@ -65,6 +71,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
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reset_regs = &cortexa_regs_reset;
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vcpu->arch.midr = read_cpuid_id();
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cpu_vtimer_irq = &cortexa_vtimer_irq;
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cpu_ptimer_irq = &cortexa_ptimer_irq;
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break;
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default:
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return -ENODEV;
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@ -77,5 +84,5 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
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kvm_reset_coprocs(vcpu);
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/* Reset arch_timer context */
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return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
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return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq, cpu_ptimer_irq);
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}
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@ -46,6 +46,11 @@ static const struct kvm_regs default_regs_reset32 = {
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COMPAT_PSR_I_BIT | COMPAT_PSR_F_BIT),
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};
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static const struct kvm_irq_level default_ptimer_irq = {
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.irq = 30,
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.level = 1,
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};
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static const struct kvm_irq_level default_vtimer_irq = {
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.irq = 27,
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.level = 1,
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@ -104,6 +109,7 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
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int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
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{
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const struct kvm_irq_level *cpu_vtimer_irq;
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const struct kvm_irq_level *cpu_ptimer_irq;
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const struct kvm_regs *cpu_reset;
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switch (vcpu->arch.target) {
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@ -117,6 +123,7 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
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}
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cpu_vtimer_irq = &default_vtimer_irq;
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cpu_ptimer_irq = &default_ptimer_irq;
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break;
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}
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@ -130,5 +137,5 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu)
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kvm_pmu_vcpu_reset(vcpu);
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/* Reset timer */
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return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq);
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return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq, cpu_ptimer_irq);
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}
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@ -58,7 +58,8 @@ struct arch_timer_cpu {
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int kvm_timer_hyp_init(void);
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int kvm_timer_enable(struct kvm_vcpu *vcpu);
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int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
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const struct kvm_irq_level *irq);
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const struct kvm_irq_level *virt_irq,
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const struct kvm_irq_level *phys_irq);
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void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);
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void kvm_timer_flush_hwstate(struct kvm_vcpu *vcpu);
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void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu);
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@ -327,9 +327,11 @@ void kvm_timer_sync_hwstate(struct kvm_vcpu *vcpu)
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}
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int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
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const struct kvm_irq_level *irq)
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const struct kvm_irq_level *virt_irq,
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const struct kvm_irq_level *phys_irq)
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{
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struct arch_timer_context *vtimer = vcpu_vtimer(vcpu);
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struct arch_timer_context *ptimer = vcpu_ptimer(vcpu);
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/*
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* The vcpu timer irq number cannot be determined in
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@ -337,7 +339,8 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
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* kvm_vcpu_set_target(). To handle this, we determine
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* vcpu timer irq number when the vcpu is reset.
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*/
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vtimer->irq.irq = irq->irq;
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vtimer->irq.irq = virt_irq->irq;
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ptimer->irq.irq = phys_irq->irq;
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/*
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* The bits in CNTV_CTL are architecturally reset to UNKNOWN for ARMv8
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@ -346,6 +349,7 @@ int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu,
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* the ARMv7 architecture.
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*/
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vtimer->cnt_ctl = 0;
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ptimer->cnt_ctl = 0;
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kvm_timer_update_state(vcpu);
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return 0;
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@ -376,6 +380,7 @@ void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu)
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/* Synchronize cntvoff across all vtimers of a VM. */
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update_vtimer_cntvoff(vcpu, kvm_phys_timer_read());
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vcpu_ptimer(vcpu)->cntvoff = 0;
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INIT_WORK(&timer->expired, kvm_timer_inject_irq_work);
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hrtimer_init(&timer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
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