| From aef4be2ecd7aaa26be8df0b12da38a511ebc8a53 Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Fri, 5 Feb 2021 11:13:24 -0800 |
| Subject: perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation_ucodes[] |
| |
| From: Jim Mattson <jmattson@google.com> |
| |
| [ Upstream commit b3c3361fe325074d4144c29d46daae4fc5a268d5 ] |
| |
| Cascade Lake Xeon parts have the same model number as Skylake Xeon |
| parts, so they are tagged with the intel_pebs_isolation |
| quirk. However, as with Skylake Xeon H0 stepping parts, the PEBS |
| isolation issue is fixed in all microcode versions. |
| |
| Add the Cascade Lake Xeon steppings (5, 6, and 7) to the |
| isolation_ucodes[] table so that these parts benefit from Andi's |
| optimization in commit 9b545c04abd4f ("perf/x86/kvm: Avoid unnecessary |
| work in guest filtering"). |
| |
| Signed-off-by: Jim Mattson <jmattson@google.com> |
| Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> |
| Reviewed-by: Andi Kleen <ak@linux.intel.com> |
| Link: https://lkml.kernel.org/r/20210205191324.2889006-1-jmattson@google.com |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| arch/x86/events/intel/core.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c |
| index d4569bfa83e3..4faaef3a8f6c 100644 |
| --- a/arch/x86/events/intel/core.c |
| +++ b/arch/x86/events/intel/core.c |
| @@ -4397,6 +4397,9 @@ static const struct x86_cpu_desc isolation_ucodes[] = { |
| INTEL_CPU_DESC(INTEL_FAM6_BROADWELL_X, 2, 0x0b000014), |
| INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 3, 0x00000021), |
| INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE_X, 4, 0x00000000), |
| + 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_L, 3, 0x0000007c), |
| INTEL_CPU_DESC(INTEL_FAM6_SKYLAKE, 3, 0x0000007c), |
| INTEL_CPU_DESC(INTEL_FAM6_KABYLAKE, 9, 0x0000004e), |
| -- |
| 2.30.1 |
| |
