diff options
| author | Marc Zyngier <marc.zyngier@arm.com> | 2017-12-07 11:46:15 +0000 |
|---|---|---|
| committer | Christoffer Dall <christoffer.dall@linaro.org> | 2017-12-18 10:53:23 +0100 |
| commit | f384dcfe4d918c1d80477d290c22ce0093823771 (patch) | |
| tree | 4f91db4a2617519c0f61da33971fa2f4cff61a75 | |
| parent | 7839c672e58bf62da8f2f0197fefb442c02ba1dd (diff) | |
| download | lwn-f384dcfe4d918c1d80477d290c22ce0093823771.tar.gz lwn-f384dcfe4d918c1d80477d290c22ce0093823771.zip | |
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>
| -rw-r--r-- | include/kvm/arm_arch_timer.h | 2 | ||||
| -rw-r--r-- | virt/kvm/arm/arch_timer.c | 13 | ||||
| -rw-r--r-- | virt/kvm/arm/arm.c | 2 |
3 files changed, 10 insertions, 7 deletions
diff --git a/include/kvm/arm_arch_timer.h b/include/kvm/arm_arch_timer.h index 6e45608b2399..9da6ce22803f 100644 --- a/include/kvm/arm_arch_timer.h +++ b/include/kvm/arm_arch_timer.h @@ -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); diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index f9555b1e7f15..aa9adfafe12b 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -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); diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 6b60c98a6e22..2e43f9d42bd5 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -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; |