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vdpa: define SVQ transitioning state for mode switching

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Will be used in following patches.

DISABLING(-1) means SVQ is being switched off to passthrough
mode.

ENABLING(1) means passthrough VQs are being switched to SVQ.

DONE(0) means SVQ switching is completed.

Message-Id: <1707910082-10243-11-git-send-email-si-wei.liu@oracle.com>
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Si-Wei Liu 2024-02-14 03:28:00 -08:00 committed by Michael S. Tsirkin
parent 1c4eab477f
commit bb000fff0a
1 changed files with 9 additions and 0 deletions
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9
include/hw/virtio/vhost-vdpa.h
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@ -30,6 +30,12 @@ typedef struct VhostVDPAHostNotifier {
void *addr;
} VhostVDPAHostNotifier;
typedef enum SVQTransitionState {
SVQ_TSTATE_DISABLING = -1,
SVQ_TSTATE_DONE,
SVQ_TSTATE_ENABLING
} SVQTransitionState;
/* Info shared by all vhost_vdpa device models */
typedef struct vhost_vdpa_shared {
int device_fd;
@ -47,6 +53,9 @@ typedef struct vhost_vdpa_shared {
/* Vdpa must send shadow addresses as IOTLB key for data queues, not GPA */
bool shadow_data;
/* SVQ switching is in progress, or already completed? */
SVQTransitionState svq_switching;
} VhostVDPAShared;
typedef struct vhost_vdpa {