Thread (28 messages) 28 messages, 6 authors, 2021-12-06
STALE1665d
Revisions (2)
  1. rfc [diff vs current]
  2. v2 current

[RFC PATCH v2 04/11] x86/msr-index: Add MSRs for Key Locker internal key

From: Chang S. Bae <hidden>
Date: 2021-05-14 20:20:56
Also in: lkml
Subsystem: the rest, x86 architecture (32-bit and 64-bit) · Maintainers: Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen

Key Locker internal key in a CPU state can be backed up in a platform
register. The backup can be also copied back to a CPU state. This mechanism
is useful to restore the key (after system sleep).

Add MSRs for the internal key backup, copy, and status check.

Signed-off-by: Chang S. Bae <redacted>
Cc: x86@kernel.org
Cc: linux-kernel@vger.kernel.org
---
 arch/x86/include/asm/msr-index.h | 6 ++++++
 1 file changed, 6 insertions(+)
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 742d89a00721..f8e78782c8f4 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -935,4 +935,10 @@
 #define MSR_VM_IGNNE                    0xc0010115
 #define MSR_VM_HSAVE_PA                 0xc0010117
 
+/* MSRs for Key Locker Internal (Wrapping) Key management */
+#define MSR_IA32_COPY_LOCAL_TO_PLATFORM	0x00000d91
+#define MSR_IA32_COPY_PLATFORM_TO_LOCAL	0x00000d92
+#define MSR_IA32_COPY_STATUS		0x00000990
+#define MSR_IA32_IWKEYBACKUP_STATUS	0x00000991
+
 #endif /* _ASM_X86_MSR_INDEX_H */
-- 
2.17.1
Keyboard shortcuts
hback out one level
jnext message in thread
kprevious message in thread
ldrill in
Escclose help / fold thread tree
?toggle this help