linux-kernel - [RFC PATCH v3 12/32] x86/cpu: add MSR numbers for FRED configuration

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Date:   Thu, 23 Feb 2023 23:01:25 -0800
From:   Xin Li <xin3.li@...el.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org, kvm@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com, peterz@...radead.org,
        andrew.cooper3@...rix.com, seanjc@...gle.com, pbonzini@...hat.com,
        ravi.v.shankar@...el.com
Subject: [RFC PATCH v3 12/32] x86/cpu: add MSR numbers for FRED configuration

From: "H. Peter Anvin (Intel)" <hpa@...or.com>

Add MSR numbers for the FRED configuration registers.

Originally-by: Megha Dey <megha.dey@...el.com>
Signed-off-by: H. Peter Anvin (Intel) <hpa@...or.com>
Signed-off-by: Xin Li <xin3.li@...el.com>
---
 arch/x86/include/asm/msr-index.h       | 13 ++++++++++++-
 tools/arch/x86/include/asm/msr-index.h | 13 ++++++++++++-
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index ad35355ee43e..87db728f8bbc 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -36,8 +36,19 @@
 #define EFER_FFXSR		(1<<_EFER_FFXSR)
 #define EFER_AUTOIBRS		(1<<_EFER_AUTOIBRS)
 
-/* Intel MSRs. Some also available on other CPUs */
+/* FRED MSRs */
+#define MSR_IA32_FRED_RSP0	0x1cc /* Level 0 stack pointer */
+#define MSR_IA32_FRED_RSP1	0x1cd /* Level 1 stack pointer */
+#define MSR_IA32_FRED_RSP2	0x1ce /* Level 2 stack pointer */
+#define MSR_IA32_FRED_RSP3	0x1cf /* Level 3 stack pointer */
+#define MSR_IA32_FRED_STKLVLS	0x1d0 /* Exception stack levels */
+#define MSR_IA32_FRED_SSP0	MSR_IA32_PL0_SSP /* Level 0 shadow stack pointer */
+#define MSR_IA32_FRED_SSP1	0x1d1 /* Level 1 shadow stack pointer */
+#define MSR_IA32_FRED_SSP2	0x1d2 /* Level 2 shadow stack pointer */
+#define MSR_IA32_FRED_SSP3	0x1d3 /* Level 3 shadow stack pointer */
+#define MSR_IA32_FRED_CONFIG	0x1d4 /* Entrypoint and interrupt stack level */
 
+/* Intel MSRs. Some also available on other CPUs */
 #define MSR_TEST_CTRL				0x00000033
 #define MSR_TEST_CTRL_SPLIT_LOCK_DETECT_BIT	29
 #define MSR_TEST_CTRL_SPLIT_LOCK_DETECT		BIT(MSR_TEST_CTRL_SPLIT_LOCK_DETECT_BIT)
diff --git a/tools/arch/x86/include/asm/msr-index.h b/tools/arch/x86/include/asm/msr-index.h
index 37ff47552bcb..0ade66db3627 100644
--- a/tools/arch/x86/include/asm/msr-index.h
+++ b/tools/arch/x86/include/asm/msr-index.h
@@ -34,8 +34,19 @@
 #define EFER_LMSLE		(1<<_EFER_LMSLE)
 #define EFER_FFXSR		(1<<_EFER_FFXSR)
 
-/* Intel MSRs. Some also available on other CPUs */
+/* FRED MSRs */
+#define MSR_IA32_FRED_RSP0	0x1cc /* Level 0 stack pointer */
+#define MSR_IA32_FRED_RSP1	0x1cd /* Level 1 stack pointer */
+#define MSR_IA32_FRED_RSP2	0x1ce /* Level 2 stack pointer */
+#define MSR_IA32_FRED_RSP3	0x1cf /* Level 3 stack pointer */
+#define MSR_IA32_FRED_STKLVLS	0x1d0 /* Exception stack levels */
+#define MSR_IA32_FRED_SSP0	MSR_IA32_PL0_SSP /* Level 0 shadow stack pointer */
+#define MSR_IA32_FRED_SSP1	0x1d1 /* Level 1 shadow stack pointer */
+#define MSR_IA32_FRED_SSP2	0x1d2 /* Level 2 shadow stack pointer */
+#define MSR_IA32_FRED_SSP3	0x1d3 /* Level 3 shadow stack pointer */
+#define MSR_IA32_FRED_CONFIG	0x1d4 /* Entrypoint and interrupt stack level */
 
+/* Intel MSRs. Some also available on other CPUs */
 #define MSR_TEST_CTRL				0x00000033
 #define MSR_TEST_CTRL_SPLIT_LOCK_DETECT_BIT	29
 #define MSR_TEST_CTRL_SPLIT_LOCK_DETECT		BIT(MSR_TEST_CTRL_SPLIT_LOCK_DETECT_BIT)
-- 
2.34.1