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kvm: add capability for any-length ioeventfds

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Cc: Gleb Natapov <[email protected]>
Cc: Paolo Bonzini <[email protected]>
Signed-off-by: Jason Wang <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
This commit is contained in:
Jason Wang 2015-09-15 14:41:59 +08:00 • committed by Paolo Bonzini
commit e9ea5069d9
4 changed files with 8 additions and 4 deletions
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4
virt/kvm/eventfd.c
View file

@ -914,9 +914,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
return -EINVAL;
/* ioeventfd with no length can't be combined with DATAMATCH */
if (!args->len &&
args->flags & (KVM_IOEVENTFD_FLAG_PIO |
KVM_IOEVENTFD_FLAG_DATAMATCH))
if (!args->len && (args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH))
return -EINVAL;
ret = kvm_assign_ioeventfd_idx(kvm, bus_idx, args);

1
virt/kvm/kvm_main.c
View file

@ -2718,6 +2718,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
case KVM_CAP_IRQFD:
case KVM_CAP_IRQFD_RESAMPLE:
#endif
case KVM_CAP_IOEVENTFD_ANY_LENGTH:
case KVM_CAP_CHECK_EXTENSION_VM:
return 1;
#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING