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platform/x86/amd: hfi: Support for ranking table versions

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Add changes to support new ranking table version. Version 2 of the
heterogeneous ranking table provides static CPU rankings. Version 3 adds
dynamic ranking table support on newer AMD platforms. These changes ensure
that platforms still reporting version 2 continue to function with the
existing static ranking path, avoiding regressions on older hardware
that does not supply a dynamic ranking table.

Signed-off-by: Krishnamoorthi M <krishnamoorthi.m@amd.com>
Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://patch.msgid.link/20260507190926.1211726-1-krishnamoorthi.m@amd.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Krishnamoorthi M 2026-05-08 00:39:26 +05:30 committed by Ilpo Järvinen
parent 5809de26cc
commit 4339fa4fae
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GPG Key ID: 59AC4F6153E5CE31
1 changed files with 4 additions and 2 deletions
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6
drivers/platform/x86/amd/hfi/hfi.c
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@ -33,7 +33,8 @@
#define AMD_HFI_DRIVER "amd_hfi"
#define AMD_HFI_MAILBOX_COUNT 1
#define AMD_HETERO_RANKING_TABLE_VER 2
#define AMD_HETERO_RANKING_TABLE_MIN_VER 2
#define AMD_HETERO_RANKING_TABLE_MAX_VER 3
#define AMD_HETERO_CPUID_27 0x80000027
@ -158,7 +159,8 @@ static int amd_hfi_fill_metadata(struct amd_hfi_data *amd_hfi_data)
dev_err(amd_hfi_data->dev, "invalid signature in shared memory\n");
return -EINVAL;
}
if (amd_hfi_data->shmem->version_number != AMD_HETERO_RANKING_TABLE_VER) {
if (amd_hfi_data->shmem->version_number < AMD_HETERO_RANKING_TABLE_MIN_VER ||
amd_hfi_data->shmem->version_number > AMD_HETERO_RANKING_TABLE_MAX_VER) {
dev_err(amd_hfi_data->dev, "invalid version %d\n",
amd_hfi_data->shmem->version_number);
return -EINVAL;