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x86/cpu: Enable SD_ASYM_PACKING for PKG domain on AMD

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Enable the SD_ASYM_PACKING domain flag for the PKG domain on AMD heterogeneous
processors.  This flag is beneficial for processors with one or more CCDs and
relies on x86_sched_itmt_flags().

Signed-off-by: Perry Yuan <perry.yuan@amd.com>
Co-developed-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://lore.kernel.org/r/20241025171459.1093-4-mario.limonciello@amd.com
This commit is contained in:
Perry Yuan
2024-10-25 12:14:57 -05:00
committed by Borislav Petkov (AMD)
parent 1ad4667066
commit b0979e5364
1 changed files with 3 additions and 2 deletions
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arch/x86/kernel/smpboot.c
+3 -2
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@@ -497,8 +497,9 @@ static int x86_cluster_flags(void)
static int x86_die_flags(void)
{
if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU))
return x86_sched_itmt_flags();
if (cpu_feature_enabled(X86_FEATURE_HYBRID_CPU) ||
cpu_feature_enabled(X86_FEATURE_AMD_HETEROGENEOUS_CORES))
return x86_sched_itmt_flags();
return 0;
}