Re: [PATCH v3 0/4] platform/x86/amd/hsmp: Family 1Ah client support

["M K, Muralidhara" <muralimk@amd.com>]

On 8/19/2026 10:17 PM, Mario Limonciello wrote:
> Caution: This message originated from an External Source. Use proper 
> caution when opening attachments, clicking links, or responding.
> 
> 
> On 8/19/26 02:31, Muralidhara M K wrote:
>> This series enables the HSMP driver on the Family 1Ah client platforms,
>> Models 80h-8Fh and E0h-E3h.
>>
>> The client parts drive a different mailbox from the server HSMP
>> interface, but the latest BIOS describes it through ACPI _CRS/_DSD the
>> same way a server socket's mailbox is described, and the parts speak
>> the Ryzen Master SMC message set instead of the server message IDs.
>> Patches 1-3 teach the driver the message set and let the client reach
>> its mailbox through the existing _CRS/_DSD-driven MMIO path, leaving
>> server behaviour unchanged, and patch 4 includes the telemetry table
>> those parts return. Only the ACPI driver probes them.
>>
>> Changes in v3:
>>
>>    - is_client_platform() now tells client and server apart through the
>>      ACPI-reported PM profile (FADT preferred_profile: PM_DESKTOP,
>>      PM_MOBILE, PM_WORKSTATION, PM_TABLET) instead of a hardcoded Family
>>      1Ah model range, the same signal amd-pstate already keys off of.
>>      Future client generations are recognised as long as firmware
>>      reports the right PM profile, with no driver update needed.
>>    - hsmp_desc() now resolves the running platform's descriptor once and
>>      caches the pointer behind READ_ONCE()/WRITE_ONCE() instead of
>>      recomputing it on every call. Concurrent first callers are benign,
>>      since every one of them computes and stores that same pointer, so
>>      the pair only needs to keep the load/store from being torn or
>>      reordered by the compiler, not order it against anything else.
>>    - The client message enum in amd_hsmp.h is now documented with
>>      kernel-doc, one @member entry per message describing its inputs
>>      and outputs, rather than a block comment plus a same-line comment
>>      per enumerator. Noted there that not every platform supports every
>>      message and that an unsupported one returns -ENOMSG.
>>    - Patch 4: the Telemetry Table RM layout moved out of the .rst and
>>      into amd_hsmp.h as real kernel-doc'd struct/enum declarations,
>>      giving userspace one authoritative definition of the byte layout.
>>      The .rst now just points at struct hsmp_telemetry_table_rm. The
>>      structs are now also packed to a 4-byte boundary to match
>>      firmware's actual layout, and the trailing NPU/PMF counters and
>>      spare padding firmware carries after the overclocking fields are
>>      no longer missing. Verified field-by-field against AMD's internal
>>      metrics table header and end-to-end against a live snapshot off
>>      Family 1Ah client hardware.
>>
>> Each patch builds individually at W=1 and is clean under
>> checkpatch.pl --strict, kernel-doc, codespell and the htmldocs build.
>>
>> Muralidhara M K (4):
>>    platform/x86/amd/hsmp: Add HSMP client support for Family 1Ah
>>    platform/x86/amd/hsmp: Route metric table through the client messages
>>    platform/x86/amd/hsmp: Add ACPI client support for Family 1Ah
>>    platform/x86/amd/hsmp: Document the client telemetry table
>>
>>   Documentation/arch/x86/amd_hsmp.rst  |  24 ++-
>>   arch/x86/include/uapi/asm/amd_hsmp.h | 398 +++++++++++++++++++++++++ 
>> ++++++++++
>>   drivers/platform/x86/amd/hsmp/acpi.c |   2 +-
>>   drivers/platform/x86/amd/hsmp/hsmp.c | 273 +++++++++++++++++++++---
>>   drivers/platform/x86/amd/hsmp/hsmp.h |  25 +++
>>   5 files changed, 688 insertions(+), 34 deletions(-)
>>
>>
>> base-commit: 775f2078b38ff2121410a35302497a1e81b8e459
> 
> Thank you very much for the changes you did in v3, I'm happy now with
> the changes.
> 
> Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>

Thanks Mario.

Hi Ilpo,
  Could you please take a look at this series and share your feedback ?