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| author | Krish Sadhukhan <[email protected]> | 2020-09-17 21:20:36 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2020-09-18 08:46:41 +0000 |
| commit | 5866e9205b47a983a77ebc8654949f696342f2ab (patch) | |
| tree | abdb11c74714c51902b260990139d5536cf0df02 /drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | |
| parent | x86/cpu/centaur: Add Centaur family >=7 CPUs initialization support (diff) | |
| download | kernel-5866e9205b47a983a77ebc8654949f696342f2ab.tar.gz kernel-5866e9205b47a983a77ebc8654949f696342f2ab.zip | |
x86/cpu: Add hardware-enforced cache coherency as a CPUID feature
In some hardware implementations, coherency between the encrypted and
unencrypted mappings of the same physical page is enforced. In such a system,
it is not required for software to flush the page from all CPU caches in the
system prior to changing the value of the C-bit for a page. This hardware-
enforced cache coherency is indicated by EAX[10] in CPUID leaf 0x8000001f.
[ bp: Use one of the free slots in word 3. ]
Suggested-by: Tom Lendacky <[email protected]>
Signed-off-by: Krish Sadhukhan <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c')
0 files changed, 0 insertions, 0 deletions