linux-kernel - [PATCH v5 06/12] x86/keylocker: Define Key Locker CPUID leaf

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Date:   Wed, 12 Jan 2022 13:12:52 -0800
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     linux-crypto@...r.kernel.org, dm-devel@...hat.com,
        herbert@...dor.apana.org.au, ebiggers@...nel.org, ardb@...nel.org,
        x86@...nel.org, luto@...nel.org, tglx@...utronix.de, bp@...e.de,
        dave.hansen@...ux.intel.com, mingo@...nel.org
Cc:     linux-kernel@...r.kernel.org, dan.j.williams@...el.com,
        charishma1.gairuboyina@...el.com, kumar.n.dwarakanath@...el.com,
        ravi.v.shankar@...el.com, chang.seok.bae@...el.com
Subject: [PATCH v5 06/12] x86/keylocker: Define Key Locker CPUID leaf

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

Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
Reviewed-by: Dan Williams <dan.j.williams@...el.com>
Cc: x86@...nel.org
Cc: linux-kernel@...r.kernel.org
---
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 df84c83228a1..e85dfb6c1524 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