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x86/cpu: Enable SD_ASYM_PACKING for PKG domain on AMD

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BugLink: https://bugs.launchpad.net/bugs/2111953

[ Upstream commit b0979e53645825a38f814ca5d3d09aed2745911d ]

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
Stable-dep-of: e1bc02646527 ("x86/topology: Use x86_sched_itmt_flags for PKG domain unconditionally")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>
This commit is contained in:
Perry Yuan
2024-10-25 12:14:57 -05:00
committed by Mehmet Basaran
parent 61f23ce5cd
commit 7a99b82e55
1 changed files with 3 additions and 2 deletions
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arch/x86/kernel/smpboot.c
+3 -2
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@@ -616,8 +616,9 @@ 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;
}