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Message-ID: <20241025171459.1093-4-mario.limonciello@amd.com>
Date: Fri, 25 Oct 2024 12:14:57 -0500
From: Mario Limonciello <mario.limonciello@....com>
To: Borislav Petkov <bp@...en8.de>
CC: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
"Dave Hansen" <dave.hansen@...ux.intel.com>, "maintainer:X86 ARCHITECTURE
(32-BIT AND 64-BIT)" <x86@...nel.org>, "H . Peter Anvin" <hpa@...or.com>,
"Rafael J . Wysocki" <rafael@...nel.org>, "Gautham R . Shenoy"
<gautham.shenoy@....com>, Mario Limonciello <mario.limonciello@....com>,
Perry Yuan <perry.yuan@....com>, Brijesh Singh <brijesh.singh@....com>, Peter
Zijlstra <peterz@...radead.org>, Li RongQing <lirongqing@...du.com>, "open
list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <linux-kernel@...r.kernel.org>,
"open list:ACPI" <linux-acpi@...r.kernel.org>, "open list:AMD PSTATE DRIVER"
<linux-pm@...r.kernel.org>, Pawan Gupta <pawan.kumar.gupta@...ux.intel.com>
Subject: [PATCH v4 3/5] x86/cpu: Enable SD_ASYM_PACKING for PKG Domain on AMD Processors
From: Perry Yuan <perry.yuan@....com>
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().
Reviewed-by: Gautham R. Shenoy <gautham.shenoy@....com>
Signed-off-by: Perry Yuan <perry.yuan@....com>
Co-developed-by: Mario Limonciello <mario.limonciello@....com>
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v3:
* Pick up tag
---
arch/x86/kernel/smpboot.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
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;
}
--
2.43.0
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