linux-kernel - [tip: perf/core] x86/cpu: Fix the AMD Fam 17h, Fam 19h, Zen2 and Zen4 MSR enumerations

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Date:   Thu, 12 Oct 2023 18:20:47 -0000
From:   "tip-bot2 for Borislav Petkov" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Borislav Petkov (AMD)" <bp@...en8.de>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: perf/core] x86/cpu: Fix the AMD Fam 17h, Fam 19h, Zen2 and Zen4
 MSR enumerations

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     deedec0a152a3d7fa5b04ef9431aeb71802835b5
Gitweb:        https://git.kernel.org/tip/deedec0a152a3d7fa5b04ef9431aeb71802835b5
Author:        Borislav Petkov <bp@...en8.de>
AuthorDate:    Thu, 12 Oct 2023 20:01:59 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Thu, 12 Oct 2023 20:10:39 +02:00

x86/cpu: Fix the AMD Fam 17h, Fam 19h, Zen2 and Zen4 MSR enumerations

The comments introduced in <asm/msr-index.h> in the merge conflict fixup in:

  8f4156d58713 ("Merge branch 'x86/urgent' into perf/core, to resolve conflict")

... aren't right: AMD naming schemes are more complex than implied,
family 0x17 is Zen1 and 2, family 0x19 is spread around Zen 3 and 4.

So there's indeed four separate MSR namespaces for:

  MSR_F17H_
  MSR_F19H_
  MSR_ZEN2_
  MSR_ZEN4_

... and the namespaces cannot be merged.

Fix it up. No change in functionality.

Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: https://lore.kernel.org/r/D99589F4-BC5D-430B-87B2-72C20370CF57@exactcode.com
---
 arch/x86/include/asm/msr-index.h | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 0ad9ba8..f8b5028 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -637,18 +637,20 @@
 /* AMD Last Branch Record MSRs */
 #define MSR_AMD64_LBR_SELECT			0xc000010e
 
-/* Fam 19h (Zen 4) MSRs */
-#define MSR_F19H_UMC_PERF_CTL		0xc0010800
-#define MSR_F19H_UMC_PERF_CTR		0xc0010801
-
-#define MSR_ZEN4_BP_CFG			0xc001102e
+/* Zen4 */
+#define MSR_ZEN4_BP_CFG                 0xc001102e
 #define MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT 5
 
-/* Fam 17h (Zen 2) MSRs */
-#define MSR_F17H_IRPERF			0xc00000e9
+/* Fam 19h MSRs */
+#define MSR_F19H_UMC_PERF_CTL           0xc0010800
+#define MSR_F19H_UMC_PERF_CTR           0xc0010801
 
-#define MSR_ZEN2_SPECTRAL_CHICKEN	0xc00110e3
-#define MSR_ZEN2_SPECTRAL_CHICKEN_BIT	BIT_ULL(1)
+/* Zen 2 */
+#define MSR_ZEN2_SPECTRAL_CHICKEN       0xc00110e3
+#define MSR_ZEN2_SPECTRAL_CHICKEN_BIT   BIT_ULL(1)
+
+/* Fam 17h MSRs */
+#define MSR_F17H_IRPERF			0xc00000e9
 
 /* Fam 16h MSRs */
 #define MSR_F16H_L2I_PERF_CTL		0xc0010230