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| author | Peter Oberparleiter <oberpar@linux.ibm.com> | 2024-03-26 17:03:22 +0100 |
|---|---|---|
| committer | Alexander Gordeev <agordeev@linux.ibm.com> | 2024-04-12 16:11:29 +0200 |
| commit | 2dc8903af775ecd51e42c0a2e7afa0e98d1bde45 (patch) | |
| tree | 7f58881e6e22ea18b84b5d0b9f94ef3b89995ed9 /drivers/s390/cio/chsc.h | |
| parent | s390/cio: simplify measurement attribute registration (diff) | |
| download | linux-2dc8903af775ecd51e42c0a2e7afa0e98d1bde45.tar.xz linux-2dc8903af775ecd51e42c0a2e7afa0e98d1bde45.zip | |
s390/cio: export extended channel-path-measurement data
Add a per-CHPID binary sysfs attribute named "ext_measurement" that
provides access to extended channel-path-measurement data for the
associated channel path.
Note that while not all channel-paths provide extended measurement data
this attribute is created unconditionally for all channel paths because
channel-path measurement capabilities might change during run-time.
Reading from the attribute will only return data for channel-paths that
support extended measurement data.
Example:
$ echo 1 > /sys/devices/css0/cm_enable
$ xxd /sys/devices/css0/chp0.32/ext_measurement
00000000: 53e0 8002 0000 0095 0000 0000 59cc e034 S...........Y..4
00000010: 38b8 cc45 0000 0000 0000 0000 3e24 fe94 8..E........>$..
00000020: 0000 0000 0000 0000 0000 0000 0000 0000 ................
00000030: 0000 0000 0000 0000 0000 0000 0000 0000 ................
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Tested-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'drivers/s390/cio/chsc.h')
| -rw-r--r-- | drivers/s390/cio/chsc.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/s390/cio/chsc.h b/drivers/s390/cio/chsc.h index 03602295f335..24cd65dbc5a7 100644 --- a/drivers/s390/cio/chsc.h +++ b/drivers/s390/cio/chsc.h @@ -22,6 +22,11 @@ struct cmg_entry { u32 values[NR_MEASUREMENT_ENTRIES]; }; +#define NR_EXT_MEASUREMENT_ENTRIES 16 +struct cmg_ext_entry { + u32 values[NR_EXT_MEASUREMENT_ENTRIES]; +}; + struct channel_path_desc_fmt1 { u8 flags; u8 lsn; |