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[v5,06/12] x86/keylocker: Define Key Locker CPUID leaf

Message ID 20220112211258.21115-7-chang.seok.bae@intel.com
State Superseded
Headers show
Series x86: Support Key Locker | expand

Commit Message

Chang S. Bae Jan. 12, 2022, 9:12 p.m. UTC 
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@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Cc: x86@kernel.org
Cc: linux-kernel@vger.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(+)
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Patch

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 */