[PATCH v9 06/14] x86/keylocker: Define Key Locker CPUID leaf

Chang S. Bae
2024-03-29T02:09:44Z

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

Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
---
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 4e731f577c50..1213d273c369 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 */
--
2.34.1