diff options
| author |  Johannes Berg <johannes.berg@intel.com>
| 2020-02-13 14:26:46 +0100 |
|---|---|---|
| committer |  Richard Weinberger <richard@nod.at>
| 2020-03-29 23:29:00 +0200 |
| commit | dd9ada5627245a3441ebde00736dd63d09acc222 (patch) | |
| tree | cd2d4d19d19f2f3830e28b26026e156d0d8d144e /arch/um/drivers/vhost_user.h | |
| parent | um: time-travel: Rewrite as an event scheduler (diff) | |
| download | linux-dd9ada5627245a3441ebde00736dd63d09acc222.tar.gz linux-dd9ada5627245a3441ebde00736dd63d09acc222.tar.bz2 linux-dd9ada5627245a3441ebde00736dd63d09acc222.zip | |
um: virtio: Implement VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS
Implement in-band notifications that are necessary for running
vhost-user devices under externally synchronized time-travel
mode (which is in a follow-up patch). This feature makes what
usually should be eventfd notifications in-band messages.
We'll prefer this feature, under the assumption that only a
few (simulation) devices will ever support it, since it's not
very efficient.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/drivers/vhost_user.h')
| -rw-r--r-- | arch/um/drivers/vhost_user.h | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/arch/um/drivers/vhost_user.h b/arch/um/drivers/vhost_user.h index 45ff5ea22fea..6c71b6005177 100644 --- a/arch/um/drivers/vhost_user.h +++ b/arch/um/drivers/vhost_user.h @@ -10,9 +10,10 @@ /* Feature bits */ #define VHOST_USER_F_PROTOCOL_FEATURES 30 /* Protocol feature bits */ -#define VHOST_USER_PROTOCOL_F_REPLY_ACK 3 -#define VHOST_USER_PROTOCOL_F_SLAVE_REQ 5 -#define VHOST_USER_PROTOCOL_F_CONFIG 9 +#define VHOST_USER_PROTOCOL_F_REPLY_ACK 3 +#define VHOST_USER_PROTOCOL_F_SLAVE_REQ 5 +#define VHOST_USER_PROTOCOL_F_CONFIG 9 +#define VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS 14 /* Vring state index masks */ #define VHOST_USER_VRING_INDEX_MASK 0xff #define VHOST_USER_VRING_POLL_MASK BIT(8) @@ -24,7 +25,8 @@ /* Supported protocol features */ #define VHOST_USER_SUPPORTED_PROTOCOL_F (BIT_ULL(VHOST_USER_PROTOCOL_F_REPLY_ACK) | \ BIT_ULL(VHOST_USER_PROTOCOL_F_SLAVE_REQ) | \ - BIT_ULL(VHOST_USER_PROTOCOL_F_CONFIG)) + BIT_ULL(VHOST_USER_PROTOCOL_F_CONFIG) | \ + BIT_ULL(VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS)) enum vhost_user_request { VHOST_USER_GET_FEATURES = 1, @@ -52,12 +54,14 @@ enum vhost_user_request { VHOST_USER_SET_VRING_ENDIAN = 23, VHOST_USER_GET_CONFIG = 24, VHOST_USER_SET_CONFIG = 25, + VHOST_USER_VRING_KICK = 35, }; enum vhost_user_slave_request { VHOST_USER_SLAVE_IOTLB_MSG = 1, VHOST_USER_SLAVE_CONFIG_CHANGE_MSG = 2, VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG = 3, + VHOST_USER_SLAVE_VRING_CALL = 4, }; struct vhost_user_header { |