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KVM: arm64: timer: Drop warning on failed interrupt signalling

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We currently spit out a warning if making a timer interrupt pending
fails. But not only this is loud and easy to trigger from userspace,
we also fail to do anything useful with that information.

Dropping the warning is the easiest thing to do for now. We can
always add error reporting if we really want in the future.

Reported-by: Alexander Potapenko <glider@google.com>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
Link: https://lore.kernel.org/r/20250212182558.2865232-2-maz@kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2025-02-12 18:25:57 +00:00
parent b938731ed2
commit e6e3e0022e
1 changed files with 7 additions and 9 deletions

16
arch/arm64/kvm/arch_timer.c
View file

@ -447,21 +447,19 @@ static void kvm_timer_update_status(struct arch_timer_context *ctx, bool level)
static void kvm_timer_update_irq(struct kvm_vcpu *vcpu, bool new_level,
struct arch_timer_context *timer_ctx)
{
int ret;
kvm_timer_update_status(timer_ctx, new_level);
timer_ctx->irq.level = new_level;
trace_kvm_timer_update_irq(vcpu->vcpu_id, timer_irq(timer_ctx),
timer_ctx->irq.level);
if (!userspace_irqchip(vcpu->kvm)) {
ret = kvm_vgic_inject_irq(vcpu->kvm, vcpu,
timer_irq(timer_ctx),
timer_ctx->irq.level,
timer_ctx);
WARN_ON(ret);
}
if (userspace_irqchip(vcpu->kvm))
return;
kvm_vgic_inject_irq(vcpu->kvm, vcpu,
timer_irq(timer_ctx),
timer_ctx->irq.level,
timer_ctx);
}
/* Only called for a fully emulated timer */