perf/x86/intel: Add Cooper Lake stepping to isolation_ucodes[]

commit 6f8faf471446844bb9c318e0340221049d5c19f4 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index 588b83cc730d3f04e6c6fe68092f67a0127db666..f36fda2672e046463b5faae8a1794bb25e557b8b 100644 (file)
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4713,6 +4713,7 @@ 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),