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[v2,04/12,RESEND] vhost: convert VHOST_VSOCK_SET_RUNNING to a generic ioctl

Message ID 20200403091406.22381-5-guennadi.liakhovetski@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series ASoC: SOF DSP virtualisation | expand

Commit Message

Guennadi Liakhovetski April 3, 2020, 9:13 a.m. UTC 
VHOST_VSOCK_SET_RUNNING is used by the vhost vsock driver to perform
crucial VirtQueue initialisation, like assigning .private fields and
calling vhost_vq_init_access(), and clean up. However, this ioctl is
actually extremely useful for any vhost driver, that doesn't have a
side channel to inform it of a status change, e.g. upon a guest
reboot. This patch makes that ioctl generic, while preserving its
numeric value and also keeping the original alias.

Signed-off-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
---
 include/uapi/linux/vhost.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
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Patch

diff --git a/include/uapi/linux/vhost.h b/include/uapi/linux/vhost.h
index 40d028ee..c628103 100644
--- a/include/uapi/linux/vhost.h
+++ b/include/uapi/linux/vhost.h
@@ -93,6 +93,8 @@ 
 #define VHOST_SET_BACKEND_FEATURES _IOW(VHOST_VIRTIO, 0x25, __u64)
 #define VHOST_GET_BACKEND_FEATURES _IOR(VHOST_VIRTIO, 0x26, __u64)
 
+#define VHOST_SET_RUNNING _IOW(VHOST_VIRTIO, 0x61, int)
+
 /* VHOST_NET specific defines */
 
 /* Attach virtio net ring to a raw socket, or tap device.
@@ -114,6 +116,6 @@ 
 /* VHOST_VSOCK specific defines */
 
 #define VHOST_VSOCK_SET_GUEST_CID	_IOW(VHOST_VIRTIO, 0x60, __u64)
-#define VHOST_VSOCK_SET_RUNNING		_IOW(VHOST_VIRTIO, 0x61, int)
+#define VHOST_VSOCK_SET_RUNNING		VHOST_SET_RUNNING
 
 #endif