Documentation: x86: convert amd-memory-encryption.txt to reST
This converts the plain text documentation to reStructuredText format and
add it to Sphinx TOC tree. No essential content change.
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
diff --git a/Documentation/x86/amd-memory-encryption.txt b/Documentation/x86/amd-memory-encryption.rst
similarity index 94%
rename from Documentation/x86/amd-memory-encryption.txt
rename to Documentation/x86/amd-memory-encryption.rst
index afc41f5..c48d452 100644
--- a/Documentation/x86/amd-memory-encryption.txt
+++ b/Documentation/x86/amd-memory-encryption.rst
@@ -1,3 +1,9 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=====================
+AMD Memory Encryption
+=====================
+
Secure Memory Encryption (SME) and Secure Encrypted Virtualization (SEV) are
features found on AMD processors.
@@ -34,7 +40,7 @@
forces the memory encryption bit to 1.
Support for SME and SEV can be determined through the CPUID instruction. The
-CPUID function 0x8000001f reports information related to SME:
+CPUID function 0x8000001f reports information related to SME::
0x8000001f[eax]:
Bit[0] indicates support for SME
@@ -48,14 +54,14 @@
addresses)
If support for SME is present, MSR 0xc00100010 (MSR_K8_SYSCFG) can be used to
-determine if SME is enabled and/or to enable memory encryption:
+determine if SME is enabled and/or to enable memory encryption::
0xc0010010:
Bit[23] 0 = memory encryption features are disabled
1 = memory encryption features are enabled
If SEV is supported, MSR 0xc0010131 (MSR_AMD64_SEV) can be used to determine if
-SEV is active:
+SEV is active::
0xc0010131:
Bit[0] 0 = memory encryption is not active
@@ -68,6 +74,7 @@
Linux itself will not set it and memory encryption will not be possible.
The state of SME in the Linux kernel can be documented as follows:
+
- Supported:
The CPU supports SME (determined through CPUID instruction).
diff --git a/Documentation/x86/index.rst b/Documentation/x86/index.rst
index b5cdc0d..85f1f44 100644
--- a/Documentation/x86/index.rst
+++ b/Documentation/x86/index.rst
@@ -20,3 +20,4 @@
pat
protection-keys
intel_mpx
+ amd-memory-encryption
