* [PATCH] perf/x86/intel: Add Cooper Lake stepping to isolation_ucodes[]
@ 2022-10-31 15:45 kan.liang
2022-11-02 22:23 ` [tip: perf/urgent] " tip-bot2 for Kan Liang
0 siblings, 1 reply; 2+ messages in thread
From: kan.liang @ 2022-10-31 15:45 UTC (permalink / raw)
To: peterz, mingo, linux-kernel; +Cc: ak, Kan Liang, stable
From: Kan Liang <kan.liang@linux.intel.com>
The intel_pebs_isolation quirk checks both model number and stepping.
Cooper Lake has a different stepping (11) than the other Skylake Xeon.
It cannot benefit from the optimization in commit 9b545c04abd4f
("perf/x86/kvm: Avoid unnecessary work in guest filtering").
Add the stepping of Cooper Lake into the isolation_ucodes[] table.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Cc: stable@vger.kernel.org
---
arch/x86/events/intel/core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index d8af75466ee9..dfd2c124cdf8 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4908,6 +4908,7 @@ static const struct x86_cpu_desc isolation_ucodes[] = {
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 5, 0x00000000),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 6, 0x00000000),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 7, 0x00000000),
+ INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 11, 0x00000000),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_L, 3, 0x0000007c),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE, 3, 0x0000007c),
INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE, 9, 0x0000004e),
--
2.35.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [tip: perf/urgent] perf/x86/intel: Add Cooper Lake stepping to isolation_ucodes[]
2022-10-31 15:45 [PATCH] perf/x86/intel: Add Cooper Lake stepping to isolation_ucodes[] kan.liang
@ 2022-11-02 22:23 ` tip-bot2 for Kan Liang
0 siblings, 0 replies; 2+ messages in thread
From: tip-bot2 for Kan Liang @ 2022-11-02 22:23 UTC (permalink / raw)
To: linux-tip-commits
Cc: Kan Liang, Peter Zijlstra (Intel), stable, x86, linux-kernel
The following commit has been merged into the perf/urgent branch of tip:
Commit-ID: 6f8faf471446844bb9c318e0340221049d5c19f4
Gitweb: https://git.kernel.org/tip/6f8faf471446844bb9c318e0340221049d5c19f4
Author: Kan Liang <kan.liang@linux.intel.com>
AuthorDate: Mon, 31 Oct 2022 08:45:50 -07:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Wed, 02 Nov 2022 12:22:07 +01:00
perf/x86/intel: Add Cooper Lake stepping to isolation_ucodes[]
The intel_pebs_isolation quirk checks both model number and stepping.
Cooper Lake has a different stepping (11) than the other Skylake Xeon.
It cannot benefit from the optimization in commit 9b545c04abd4f
("perf/x86/kvm: Avoid unnecessary work in guest filtering").
Add the stepping of Cooper Lake into the isolation_ucodes[] table.
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/20221031154550.571663-1-kan.liang@linux.intel.com
---
arch/x86/events/intel/core.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index a646a5f..1b92bf0 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4911,6 +4911,7 @@ static const struct x86_cpu_desc isolation_ucodes[] = {
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 5, 0x00000000),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 6, 0x00000000),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 7, 0x00000000),
+ INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 11, 0x00000000),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_L, 3, 0x0000007c),
INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE, 3, 0x0000007c),
INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE, 9, 0x0000004e),
^ permalink raw reply related [flat|nested] 2+ messages in thread
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2022-10-31 15:45 [PATCH] perf/x86/intel: Add Cooper Lake stepping to isolation_ucodes[] kan.liang
2022-11-02 22:23 ` [tip: perf/urgent] " tip-bot2 for Kan Liang
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