linux-kernel - [RFC PATCH 22/41] x86: Introduce MSR_CORE_PERF_GLOBAL_STATUS

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Date: Fri, 26 Jan 2024 16:54:25 +0800
From: Xiong Zhang <xiong.y.zhang@...ux.intel.com>
To: seanjc@...gle.com,
	pbonzini@...hat.com,
	peterz@...radead.org,
	mizhang@...gle.com,
	kan.liang@...el.com,
	zhenyuw@...ux.intel.com,
	dapeng1.mi@...ux.intel.com,
	jmattson@...gle.com
Cc: kvm@...r.kernel.org,
	linux-perf-users@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	zhiyuan.lv@...el.com,
	eranian@...gle.com,
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	samantha.alt@...el.com,
	like.xu.linux@...il.com,
	chao.gao@...el.com,
	xiong.y.zhang@...ux.intel.com
Subject: [RFC PATCH 22/41] x86: Introduce MSR_CORE_PERF_GLOBAL_STATUS_SET for passthrough PMU

From: Dapeng Mi <dapeng1.mi@...ux.intel.com>

Add additional PMU MSRs MSR_CORE_PERF_GLOBAL_STATUS_SET to allow
passthrough PMU operation on the read-only MSR IA32_PERF_GLOBAL_STATUS.

Signed-off-by: Dapeng Mi <dapeng1.mi@...ux.intel.com>
Signed-off-by: Mingwei Zhang <mizhang@...gle.com>
---
 arch/x86/include/asm/msr-index.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 1d51e1850ed0..270f4f420801 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -1059,6 +1059,7 @@
 #define MSR_CORE_PERF_GLOBAL_STATUS	0x0000038e
 #define MSR_CORE_PERF_GLOBAL_CTRL	0x0000038f
 #define MSR_CORE_PERF_GLOBAL_OVF_CTRL	0x00000390
+#define MSR_CORE_PERF_GLOBAL_STATUS_SET 0x00000391
 
 #define MSR_PERF_METRICS		0x00000329
 
-- 
2.34.1