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kvm: require KVM_CAP_IOEVENTFD and KVM_CAP_IOEVENTFD_ANY_LENGTH

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KVM_CAP_IOEVENTFD_ANY_LENGTH was added in Linux 4.4, released in 2016.
Assume that it is present.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2023-10-17 14:13:04 +02:00
parent 5d9ec1f4c7
commit 126e7f7803
9 changed files with 18 additions and 78 deletions
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7
hw/virtio/vhost-user.c
View file

@ -264,11 +264,6 @@ struct scrub_regions {
int fd_idx;
};
static bool ioeventfd_enabled(void)
{
return !kvm_enabled() || kvm_eventfds_enabled();
}
static int vhost_user_read_header(struct vhost_dev *dev, VhostUserMsg *msg)
{
struct vhost_user *u = dev->opaque;
@ -1318,7 +1313,7 @@ static int vhost_set_vring_file(struct vhost_dev *dev,
.hdr.size = sizeof(msg.payload.u64),
};
if (ioeventfd_enabled() && file->fd > 0) {
if (file->fd > 0) {
fds[fd_num++] = file->fd;
} else {
msg.payload.u64 |= VHOST_USER_VRING_NOFD_MASK;