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| author | Farhan Ali <alifm@linux.ibm.com> | 2020-05-05 15:27:43 +0300 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2020-06-03 12:27:43 +0300 |
| commit | d8cac29b1d52204e6632d2887eff766acd02b9aa (patch) | |
| tree | cef969d5a9b5e23684a582d11218b23ac5512896 /include/uapi/linux/vfio_ccw.h | |
| parent | 4296151d231eeee78514bf7f495c46683785255d (diff) | |
| download | linux-d8cac29b1d52204e6632d2887eff766acd02b9aa.tar.xz | |
vfio-ccw: Introduce a new CRW region
This region provides a mechanism to pass a Channel Report Word
that affect vfio-ccw devices, and needs to be passed to the guest
for its awareness and/or processing.
The base driver (see crw_collect_info()) provides space for two
CRWs, as a subchannel event may have two CRWs chained together
(one for the ssid, one for the subchannel). As vfio-ccw will
deal with everything at the subchannel level, provide space
for a single CRW to be transferred in one shot.
Signed-off-by: Farhan Ali <alifm@linux.ibm.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20200505122745.53208-7-farman@linux.ibm.com>
[CH: added padding to ccw_crw_region]
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'include/uapi/linux/vfio_ccw.h')
| -rw-r--r-- | include/uapi/linux/vfio_ccw.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio_ccw.h b/include/uapi/linux/vfio_ccw.h index 758bf214898d..aa04f3aa6db0 100644 --- a/include/uapi/linux/vfio_ccw.h +++ b/include/uapi/linux/vfio_ccw.h @@ -44,4 +44,13 @@ struct ccw_schib_region { __u8 schib_area[SCHIB_AREA_SIZE]; } __packed; +/* + * Used for returning a Channel Report Word to userspace. + * Note: this is controlled by a capability + */ +struct ccw_crw_region { + __u32 crw; + __u32 pad; +} __packed; + #endif |