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| author | Suma Hegde <suma.hegde@amd.com> | 2023-10-10 12:03:09 +0000 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2023-10-12 16:29:58 +0300 |
| commit | 5150542b8ec5fb561be080ed0ef3bab8598154c3 (patch) | |
| tree | 711966c68853dae66ba05dbd101403ffc8ba68ef /Documentation/arch | |
| parent | 01d2adcfe0f1bc0f08d822a04b2c354c106d4d2f (diff) | |
| download | linux-5150542b8ec5fb561be080ed0ef3bab8598154c3.tar.gz | |
platform/x86/amd/hsmp: add support for metrics tbl
AMD MI300 MCM provides GET_METRICS_TABLE message to retrieve
all the system management information from SMU.
The metrics table is made available as hexadecimal sysfs binary file
under per socket sysfs directory created at
/sys/devices/platform/amd_hsmp/socket%d/metrics_bin
Metrics table definitions will be documented as part of Public PPR.
The same is defined in the amd_hsmp.h header.
Signed-off-by: Suma Hegde <suma.hegde@amd.com>
Reviewed-by: Naveen Krishna Chatradhi <nchatrad@amd.com>
Link: https://lore.kernel.org/r/20231010120310.3464066-2-suma.hegde@amd.com
[ij: lseek -> lseek(), dram -> DRAM in dev_err()]
[ij: added period to terminate a documentation sentence]
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Diffstat (limited to 'Documentation/arch')
| -rw-r--r-- | Documentation/arch/x86/amd_hsmp.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/arch/x86/amd_hsmp.rst b/Documentation/arch/x86/amd_hsmp.rst index 440e4b645a1cd6..c92bfd55359f2e 100644 --- a/Documentation/arch/x86/amd_hsmp.rst +++ b/Documentation/arch/x86/amd_hsmp.rst @@ -41,6 +41,24 @@ In-kernel integration: * Locking across callers is taken care by the driver. +HSMP sysfs interface +==================== + +1. Metrics table binary sysfs + +AMD MI300A MCM provides GET_METRICS_TABLE message to retrieve +most of the system management information from SMU in one go. + +The metrics table is made available as hexadecimal sysfs binary file +under per socket sysfs directory created at +/sys/devices/platform/amd_hsmp/socket%d/metrics_bin + +Note: lseek() is not supported as entire metrics table is read. + +Metrics table definitions will be documented as part of Public PPR. +The same is defined in the amd_hsmp.h header. + + An example ========== |