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KVM: x86: WARN if IRQ bypass isn't supported in kvm_pi_update_irte()

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WARN if kvm_pi_update_irte() is reached without IRQ bypass support, as the
code is only reachable if the VM already has an IRQ bypass producer (see
kvm_irq_routing_update()), or from kvm_arch_irq_bypass_{add,del}_producer(),
which, stating the obvious, are called if and only if KVM enables its IRQ
bypass hooks.

Cc: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20250611224604.313496-52-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2025-06-11 15:45:53 -07:00
parent 04c4ca0ae4
commit d1bccaa179
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/irq.c
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@ -517,7 +517,7 @@ static int kvm_pi_update_irte(struct kvm_kernel_irqfd *irqfd,
struct kvm_lapic_irq irq;
int r;
if (!irqchip_in_kernel(kvm) || !kvm_arch_has_irq_bypass())
if (!irqchip_in_kernel(kvm) || WARN_ON_ONCE(!kvm_arch_has_irq_bypass()))
return 0;
if (entry && entry->type == KVM_IRQ_ROUTING_MSI) {