From: Perry Yuan <perry.yuan@amd.com>
Date: Fri, 25 Oct 2024 17:14:57 +0000 (-0500)
Subject: x86/cpu: Enable SD_ASYM_PACKING for PKG domain on AMD
X-Git-Tag: v6.13-rc1~182^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b0979e53645825a38f814ca5d3d09aed2745911d;p=thirdparty%2Fkernel%2Flinux.git

x86/cpu: Enable SD_ASYM_PACKING for PKG domain on AMD

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
---

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 766f092dab80b..b5a8f0891135b 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -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;
 }