linux-kernel - [PATCH 5.10 074/102] perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210305120906.917849403@linuxfoundation.org>
Date:   Fri,  5 Mar 2021 13:21:33 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jim Mattson <jmattson@...gle.com>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 074/102] perf/x86/kvm: Add Cascade Lake Xeon steppings to isolation_ucodes[]

From: Jim Mattson <jmattson@...gle.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@...gle.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Andi Kleen <ak@...ux.intel.com>
Link: https://lkml.kernel.org/r/20210205191324.2889006-1-jmattson@google.com
Signed-off-by: Sasha Levin <sashal@...nel.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 7d4d89fa8647..aaa7bffdb20f 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -4384,6 +4384,9 @@ 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