[PATCH] platform/x86/amd: hfi: Support for ranking table versions
From: Krishnamoorthi M
Date: Thu May 07 2026 - 15:11:42 EST
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@xxxxxxx>
---
drivers/platform/x86/amd/hfi/hfi.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index 83863a5e0fbc..e0ebcb0c4acd 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -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;
--
2.34.1