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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 03:22:49 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-16 03:22:49 +0000 |
| commit | 87662aef9c2f9405ca8937c07372641e69113654 (patch) | |
| tree | 612907d41d90d34f497c4bfbbfd9fbd368d2a1d7 /Documentation/x86/amd-memory-encryption.rst | |
| parent | Adding debian version 6.1.82-1. (diff) | |
| download | linux-87662aef9c2f9405ca8937c07372641e69113654.tar.xz linux-87662aef9c2f9405ca8937c07372641e69113654.zip | |
Merging upstream version 6.1.85.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/x86/amd-memory-encryption.rst')
| -rw-r--r-- | Documentation/x86/amd-memory-encryption.rst | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/x86/amd-memory-encryption.rst b/Documentation/x86/amd-memory-encryption.rst index 934310ce7..bace87cc9 100644 --- a/Documentation/x86/amd-memory-encryption.rst +++ b/Documentation/x86/amd-memory-encryption.rst @@ -87,14 +87,14 @@ The state of SME in the Linux kernel can be documented as follows: kernel is non-zero). SME can also be enabled and activated in the BIOS. If SME is enabled and -activated in the BIOS, then all memory accesses will be encrypted and it will -not be necessary to activate the Linux memory encryption support. If the BIOS -merely enables SME (sets bit 23 of the MSR_AMD64_SYSCFG), then Linux can activate -memory encryption by default (CONFIG_AMD_MEM_ENCRYPT_ACTIVE_BY_DEFAULT=y) or -by supplying mem_encrypt=on on the kernel command line. However, if BIOS does -not enable SME, then Linux will not be able to activate memory encryption, even -if configured to do so by default or the mem_encrypt=on command line parameter -is specified. +activated in the BIOS, then all memory accesses will be encrypted and it +will not be necessary to activate the Linux memory encryption support. + +If the BIOS merely enables SME (sets bit 23 of the MSR_AMD64_SYSCFG), +then memory encryption can be enabled by supplying mem_encrypt=on on the +kernel command line. However, if BIOS does not enable SME, then Linux +will not be able to activate memory encryption, even if configured to do +so by default or the mem_encrypt=on command line parameter is specified. Secure Nested Paging (SNP) ========================== |