This is a note to let you know that I've just added the patch titled
x86/cpu: Enable SD_ASYM_PACKING for PKG domain on AMD
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-cpu-enable-sd_asym_packing-for-pkg-domain-on-amd.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d04d93f89e8b85fdf8b34e478197fdc9665d72a9
Author: Perry Yuan <perry.yuan@xxxxxxx>
Date: Fri Oct 25 12:14:57 2024 -0500
x86/cpu: Enable SD_ASYM_PACKING for PKG domain on AMD
[ 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@xxxxxxx>
Co-developed-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@xxxxxxx>
Link: https://lore.kernel.org/r/20241025171459.1093-4-mario.limonciello@xxxxxxx
Stable-dep-of: e1bc02646527 ("x86/topology: Use x86_sched_itmt_flags for PKG domain unconditionally")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index e4781e7496f6f..9150bd5147d01 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -606,8 +606,9 @@ 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;
}
