linux-kernel - [tip: x86/fpu] x86/msr-index: Add MSRs for XFD

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Date:   Tue, 26 Oct 2021 16:16:40 -0000
From:   "tip-bot2 for Chang S. Bae" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Chang S. Bae" <chang.seok.bae@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...e.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/fpu] x86/msr-index: Add MSRs for XFD

The following commit has been merged into the x86/fpu branch of tip:

Commit-ID:     dae1bd58389615d401a84aedc38fa075ef8f7de6
Gitweb:        https://git.kernel.org/tip/dae1bd58389615d401a84aedc38fa075ef8f7de6
Author:        Chang S. Bae <chang.seok.bae@...el.com>
AuthorDate:    Thu, 21 Oct 2021 15:55:17 -07:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Tue, 26 Oct 2021 10:18:09 +02:00

x86/msr-index: Add MSRs for XFD

XFD introduces two MSRs:

    - IA32_XFD to enable/disable a feature controlled by XFD

    - IA32_XFD_ERR to expose to the #NM trap handler which feature
      was tried to be used for the first time.

Both use the same xstate-component bitmap format, used by XCR0.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20211021225527.10184-14-chang.seok.bae@intel.com
---
 arch/x86/include/asm/msr-index.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index a7c4134..01e2650 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -625,6 +625,8 @@
 
 #define MSR_IA32_BNDCFGS_RSVD		0x00000ffc
 
+#define MSR_IA32_XFD			0x000001c4
+#define MSR_IA32_XFD_ERR		0x000001c5
 #define MSR_IA32_XSS			0x00000da0
 
 #define MSR_IA32_APICBASE		0x0000001b