linux-kernel - [PATCH v7 06/12] x86/keylocker: Define Key Locker CPUID leaf

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Message-Id: <20230524165717.14062-7-chang.seok.bae@intel.com>
Date:   Wed, 24 May 2023 09:57:11 -0700
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     linux-kernel@...r.kernel.org, linux-crypto@...r.kernel.org,
        dm-devel@...hat.com
Cc:     ebiggers@...nel.org, elliott@....com, gmazyland@...il.com,
        luto@...nel.org, dave.hansen@...ux.intel.com, tglx@...utronix.de,
        bp@...en8.de, mingo@...nel.org, x86@...nel.org,
        herbert@...dor.apana.org.au, ardb@...nel.org,
        dan.j.williams@...el.com, bernie.keany@...el.com,
        charishma1.gairuboyina@...el.com,
        lalithambika.krishnakumar@...el.com, nhuck@...gle.com,
        chang.seok.bae@...el.com, Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH v7 06/12] x86/keylocker: Define Key Locker CPUID leaf

Both Key Locker enabling code in the x86 core and AES Key Locker code
in the crypto library will need to reference some CPUID bits. Define
these feature-specific CPUID leaf and bits.

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Reviewed-by: Dan Williams <dan.j.williams@...el.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
Cc: linux-kernel@...r.kernel.org
---
Changes from v6:
* Tweak the changelog -- comment the reason first and then brief the
  change.

Changes from RFC v2:
* Separate out the code as a new patch.
---
 arch/x86/include/asm/keylocker.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/x86/include/asm/keylocker.h b/arch/x86/include/asm/keylocker.h
index 9b3bec452b31..1717e0866254 100644
--- a/arch/x86/include/asm/keylocker.h
+++ b/arch/x86/include/asm/keylocker.h
@@ -5,6 +5,7 @@
 
 #ifndef __ASSEMBLY__
 
+#include <linux/bits.h>
 #include <asm/fpu/types.h>
 
 /**
@@ -21,5 +22,11 @@ struct iwkey {
 	struct reg_128_bit encryption_key[2];
 };
 
+#define KEYLOCKER_CPUID			0x019
+#define KEYLOCKER_CPUID_EAX_SUPERVISOR	BIT(0)
+#define KEYLOCKER_CPUID_EBX_AESKLE	BIT(0)
+#define KEYLOCKER_CPUID_EBX_WIDE	BIT(2)
+#define KEYLOCKER_CPUID_EBX_BACKUP	BIT(4)
+
 #endif /*__ASSEMBLY__ */
 #endif /* _ASM_KEYLOCKER_H */
-- 
2.17.1