diff options
| author | Ingo Molnar <mingo@kernel.org> | 2024-02-26 11:06:48 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-02-26 11:10:35 +0100 |
| commit | 2e5fc4786b7ad311393a70894c773aa106c6dbb3 (patch) | |
| tree | 5eb9d382795a6739f1c556eaf69fdcfa6b265b7e /Documentation/arch/x86 | |
| parent | 29cd85557d8b8b3d068b5c29fdd9a0fa9ca7ef7a (diff) | |
| parent | ee8ff8768735edc3e013837c4416f819543ddc17 (diff) | |
Merge branch 'x86/sev' into x86/boot, to resolve conflicts and to pick up dependent tree
We are going to queue up a number of patches that depend
on fresh changes in x86/sev - merge in that branch to
reduce the number of conflicts going forward.
Also resolve a current conflict with x86/sev.
Conflicts:
arch/x86/include/asm/coco.h
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation/arch/x86')
| -rw-r--r-- | Documentation/arch/x86/amd-memory-encryption.rst | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/Documentation/arch/x86/amd-memory-encryption.rst b/Documentation/arch/x86/amd-memory-encryption.rst index 07caa8fff852..414bc7402ae7 100644 --- a/Documentation/arch/x86/amd-memory-encryption.rst +++ b/Documentation/arch/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) ========================== |