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| author | Krish Sadhukhan <[email protected]> | 2020-09-17 21:20:38 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2020-09-19 18:46:59 +0000 |
| commit | e1ebb2b49048c4767cfa0d8466f9c701e549fa5e (patch) | |
| tree | 2b9bf9e48ea3daa5d2fca77dd780a4b8d23b9631 /drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c | |
| parent | x86/mm/pat: Don't flush cache if hardware enforces cache coherency across enc... (diff) | |
| download | kernel-e1ebb2b49048c4767cfa0d8466f9c701e549fa5e.tar.gz kernel-e1ebb2b49048c4767cfa0d8466f9c701e549fa5e.zip | |
KVM: SVM: Don't flush cache if hardware enforces cache coherency across encryption domains
In some hardware implementations, coherency between the encrypted and
unencrypted mappings of the same physical page in a VM is enforced. In
such a system, it is not required for software to flush the VM's page
from all CPU caches in the system prior to changing the value of the
C-bit for the page.
So check that bit before flushing the cache.
Signed-off-by: Krish Sadhukhan <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Paolo Bonzini <[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