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KVM: arm/arm64: timer: Don't set irq as forwarded if no usable GIC 

If we don't have a usable GIC, do not try to set the vcpu affinity
as this is guaranteed to fail.

Reported-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Tested-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier 2017-12-07 11:46:15 +00:00 committed by Christoffer Dall
parent 7839c672e5
commit f384dcfe4d
3 changed files with 10 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/kvm/arm_arch_timer.h
View File

@ -62,7 +62,7 @@ struct arch_timer_cpu {
bool enabled;
};
int kvm_timer_hyp_init(void);
int kvm_timer_hyp_init(bool);
int kvm_timer_enable(struct kvm_vcpu *vcpu);
int kvm_timer_vcpu_reset(struct kvm_vcpu *vcpu);
void kvm_timer_vcpu_init(struct kvm_vcpu *vcpu);

13
virt/kvm/arm/arch_timer.c
View File

@ -720,7 +720,7 @@ static int kvm_timer_dying_cpu(unsigned int cpu)
return 0;
}
int kvm_timer_hyp_init(void)
int kvm_timer_hyp_init(bool has_gic)
{
struct arch_timer_kvm_info *info;
int err;
@ -756,10 +756,13 @@ int kvm_timer_hyp_init(void)
return err;
}
err = irq_set_vcpu_affinity(host_vtimer_irq, kvm_get_running_vcpus());
if (err) {
kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
goto out_free_irq;
if (has_gic) {
err = irq_set_vcpu_affinity(host_vtimer_irq,
kvm_get_running_vcpus());
if (err) {
kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
goto out_free_irq;
}
}
kvm_info("virtual timer IRQ%d\n", host_vtimer_irq);

2
virt/kvm/arm/arm.c
View File

@ -1326,7 +1326,7 @@ static int init_subsystems(void)
/*
* Init HYP architected timer support
*/
err = kvm_timer_hyp_init();
err = kvm_timer_hyp_init(vgic_present);
if (err)
goto out;