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KVM: Don't WARN if updating IRQ bypass route fails

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Don't bother WARNing if updating an IRTE route fails now that vendor code
provides much more precise WARNs.  The generic WARN doesn't provide enough
information to actually debug the problem, and has obviously done nothing
to surface the myriad bugs in KVM x86's implementation.

Drop all of the associated return code plumbing that existed just so that
common KVM could WARN.

Link: https://lore.kernel.org/r/20250611224604.313496-34-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2025-06-11 15:45:35 -07:00
parent 53527ea1b7
commit b33252b9d1
6 changed files with 20 additions and 25 deletions
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15
virt/kvm/eventfd.c
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@@ -285,11 +285,11 @@ void __attribute__((weak)) kvm_arch_irq_bypass_start(
{
}
int __weak kvm_arch_update_irqfd_routing(struct kvm_kernel_irqfd *irqfd,
struct kvm_kernel_irq_routing_entry *old,
struct kvm_kernel_irq_routing_entry *new)
void __weak kvm_arch_update_irqfd_routing(struct kvm_kernel_irqfd *irqfd,
struct kvm_kernel_irq_routing_entry *old,
struct kvm_kernel_irq_routing_entry *new)
{
return 0;
}
bool __attribute__((weak)) kvm_arch_irqfd_route_changed(
@@ -617,11 +617,8 @@ void kvm_irq_routing_update(struct kvm *kvm)
#if IS_ENABLED(CONFIG_HAVE_KVM_IRQ_BYPASS)
if (irqfd->producer &&
kvm_arch_irqfd_route_changed(&old, &irqfd->irq_entry)) {
int ret = kvm_arch_update_irqfd_routing(irqfd, &old, &irqfd->irq_entry);
WARN_ON(ret);
}
kvm_arch_irqfd_route_changed(&old, &irqfd->irq_entry))
kvm_arch_update_irqfd_routing(irqfd, &old, &irqfd->irq_entry);
#endif
}