diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-05-22 16:52:20 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-06-23 09:50:59 -0700 |
| commit | b599d44a71f1aa1acff54b05e4c0e60ea82ed90c (patch) | |
| tree | 3630ba6a686293f71cdc425ac5250920547a99f5 | |
| parent | 2cdd64cbf9906f9d2d52ef96e1471992ff6c27ec (diff) | |
KVM: Drop sanity check that per-VM list of irqfds is unique
Now that the eventfd's waitqueue ensures it has at most one priority
waiter, i.e. prevents KVM from binding multiple irqfds to one eventfd,
drop KVM's sanity check that eventfds are unique for a single VM.
Tested-by: K Prateek Nayak <kprateek.nayak@amd.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250522235223.3178519-11-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | virt/kvm/eventfd.c | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index ab9e3cfb81bf..6b1133a6617f 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -288,7 +288,6 @@ static void kvm_irqfd_register(struct file *file, wait_queue_head_t *wqh, { struct kvm_irqfd_pt *p = container_of(pt, struct kvm_irqfd_pt, pt); struct kvm_kernel_irqfd *irqfd = p->irqfd; - struct kvm_kernel_irqfd *tmp; struct kvm *kvm = p->kvm; /* @@ -328,16 +327,6 @@ static void kvm_irqfd_register(struct file *file, wait_queue_head_t *wqh, if (p->ret) goto out; - list_for_each_entry(tmp, &kvm->irqfds.items, list) { - if (irqfd->eventfd != tmp->eventfd) - continue; - - WARN_ON_ONCE(1); - /* This fd is used for another irq already. */ - p->ret = -EBUSY; - goto out; - } - list_add_tail(&irqfd->list, &kvm->irqfds.items); out: |