diff options
| author | Christoffer Dall <cdall@linaro.org> | 2017-05-04 13:32:53 +0200 |
|---|---|---|
| committer | Christoffer Dall <cdall@linaro.org> | 2017-06-08 17:00:12 +0200 |
| commit | abcb851daa617706e90ee7d39d4d9a74ac05f4b1 (patch) | |
| tree | a126efb3a85113f4c215568a5072598b24affdce /virt/kvm/arm/arch_timer.c | |
| parent | c6ccd30e0de384f506449474ca780ff680ad4217 (diff) | |
KVM: arm/arm64: Check if irq lines to the GIC are already used
We check if other in-kernel devices have already been connected to the
GIC for a particular interrupt line when possible.
For the PMU, we can do this whenever setting the PMU interrupt number
from userspace.
For the timers, we have to wait until we try to enable the timer,
because we have a concept of default IRQ numbers that userspace
shouldn't have to work around in the initialization phase.
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm/arm/arch_timer.c')
| -rw-r--r-- | virt/kvm/arm/arch_timer.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/virt/kvm/arm/arch_timer.c b/virt/kvm/arm/arch_timer.c index e03da1abd11f..07f6f9bfc1f2 100644 --- a/virt/kvm/arm/arch_timer.c +++ b/virt/kvm/arm/arch_timer.c @@ -618,20 +618,22 @@ void kvm_timer_vcpu_terminate(struct kvm_vcpu *vcpu) kvm_vgic_unmap_phys_irq(vcpu, vtimer->irq.irq); } -static bool timer_irqs_are_valid(struct kvm *kvm) +static bool timer_irqs_are_valid(struct kvm_vcpu *vcpu) { - struct kvm_vcpu *vcpu; int vtimer_irq, ptimer_irq; - int i; + int i, ret; - vcpu = kvm_get_vcpu(kvm, 0); vtimer_irq = vcpu_vtimer(vcpu)->irq.irq; - ptimer_irq = vcpu_ptimer(vcpu)->irq.irq; + ret = kvm_vgic_set_owner(vcpu, vtimer_irq, vcpu_vtimer(vcpu)); + if (ret) + return false; - if (vtimer_irq == ptimer_irq) + ptimer_irq = vcpu_ptimer(vcpu)->irq.irq; + ret = kvm_vgic_set_owner(vcpu, ptimer_irq, vcpu_ptimer(vcpu)); + if (ret) return false; - kvm_for_each_vcpu(i, vcpu, kvm) { + kvm_for_each_vcpu(i, vcpu, vcpu->kvm) { if (vcpu_vtimer(vcpu)->irq.irq != vtimer_irq || vcpu_ptimer(vcpu)->irq.irq != ptimer_irq) return false; @@ -659,7 +661,7 @@ int kvm_timer_enable(struct kvm_vcpu *vcpu) if (!vgic_initialized(vcpu->kvm)) return -ENODEV; - if (!timer_irqs_are_valid(vcpu->kvm)) { + if (!timer_irqs_are_valid(vcpu)) { kvm_debug("incorrectly configured timer irqs\n"); return -EINVAL; } |