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| author | Farhan Ali <alifm@linux.ibm.com> | 2020-05-05 14:27:41 +0200 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2020-06-02 13:14:08 +0200 |
| commit | 24c986748ba670c903a9d6a11ee96de2b3f5f1b8 (patch) | |
| tree | 4117927cb0d8a23c596dc72b5e0f22f1213efd46 /include | |
| parent | vfio-ccw: Refactor the unregister of the async regions (diff) | |
| download | linux-24c986748ba670c903a9d6a11ee96de2b3f5f1b8.tar.xz linux-24c986748ba670c903a9d6a11ee96de2b3f5f1b8.zip | |
vfio-ccw: Introduce a new schib region
The schib region can be used by userspace to get the subchannel-
information block (SCHIB) for the passthrough subchannel.
This can be useful to get information such as channel path
information via the SCHIB.PMCW fields.
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: <20200505122745.53208-5-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/vfio.h | 1 | ||||
| -rw-r--r-- | include/uapi/linux/vfio_ccw.h | 10 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/uapi/linux/vfio.h b/include/uapi/linux/vfio.h index 015516bcfaa3..7a1abbd889bd 100644 --- a/include/uapi/linux/vfio.h +++ b/include/uapi/linux/vfio.h @@ -378,6 +378,7 @@ struct vfio_region_gfx_edid { /* sub-types for VFIO_REGION_TYPE_CCW */ #define VFIO_REGION_SUBTYPE_CCW_ASYNC_CMD (1) +#define VFIO_REGION_SUBTYPE_CCW_SCHIB (2) /* * The MSIX mappable capability informs that MSIX data of a BAR can be mmapped diff --git a/include/uapi/linux/vfio_ccw.h b/include/uapi/linux/vfio_ccw.h index cbecbf0cd54f..758bf214898d 100644 --- a/include/uapi/linux/vfio_ccw.h +++ b/include/uapi/linux/vfio_ccw.h @@ -34,4 +34,14 @@ struct ccw_cmd_region { __u32 ret_code; } __packed; +/* + * Used for processing commands that read the subchannel-information block + * Reading this region triggers a stsch() to hardware + * Note: this is controlled by a capability + */ +struct ccw_schib_region { +#define SCHIB_AREA_SIZE 52 + __u8 schib_area[SCHIB_AREA_SIZE]; +} __packed; + #endif |