diff options
| author | Suma Hegde <suma.hegde@amd.com> | 2025-05-06 10:15:42 +0000 |
|---|---|---|
| committer | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2025-05-12 13:20:35 +0300 |
| commit | 511a4a5ea2b6f1d4e0c719f27db6b627b2b52e49 (patch) | |
| tree | 2497e26ba114a8662f7e824356aac17a6bd78fed /Documentation/arch | |
| parent | 92c025db52bb94a032eb3d473bb81e62c19ddbd3 (diff) | |
platform/x86/amd/hsmp: acpi: Add sysfs files to display HSMP telemetry
Make frequently fetched telemetry available via sysfs. These parameters
do not fit in hwmon sensor model, hence make them available via sysfs.
Create following sysfs files per acpi device node.
* c0_residency_input
* prochot_status
* smu_fw_version
* protocol_version
* ddr_max_bw(GB/s)
* ddr_utilised_bw_input(GB/s)
* ddr_utilised_bw_perc_input(%)
* mclk_input(MHz)
* fclk_input(MHz)
* clk_fmax(MHz)
* clk_fmin(MHz)
* cclk_freq_limit_input(MHz)
* pwr_current_active_freq_limit(MHz)
* pwr_current_active_freq_limit_source
Signed-off-by: Suma Hegde <suma.hegde@amd.com>
Reviewed-by: Naveen Krishna Chatradhi <naveenkrishna.chatradhi@amd.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20250506101542.200811-3-suma.hegde@amd.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 | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/arch/x86/amd_hsmp.rst b/Documentation/arch/x86/amd_hsmp.rst index 3ef3e0a71df9..a094f55c10b0 100644 --- a/Documentation/arch/x86/amd_hsmp.rst +++ b/Documentation/arch/x86/amd_hsmp.rst @@ -71,6 +71,28 @@ 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. +2. HSMP telemetry sysfs files + +Following sysfs files are available at /sys/devices/platform/AMDI0097:0X/. + +* c0_residency_input: Percentage of cores in C0 state. +* prochot_status: Reports 1 if the processor is at thermal threshold value, + 0 otherwise. +* smu_fw_version: SMU firmware version. +* protocol_version: HSMP interface version. +* ddr_max_bw: Theoretical maximum DDR bandwidth in GB/s. +* ddr_utilised_bw_input: Current utilized DDR bandwidth in GB/s. +* ddr_utilised_bw_perc_input(%): Percentage of current utilized DDR bandwidth. +* mclk_input: Memory clock in MHz. +* fclk_input: Fabric clock in MHz. +* clk_fmax: Maximum frequency of socket in MHz. +* clk_fmin: Minimum frequency of socket in MHz. +* cclk_freq_limit_input: Core clock frequency limit per socket in MHz. +* pwr_current_active_freq_limit: Current active frequency limit of socket + in MHz. +* pwr_current_active_freq_limit_source: Source of current active frequency + limit. + ACPI device object format ========================= The ACPI object format expected from the amd_hsmp driver |