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KVM: x86/mmu: Set shadow_accessed_mask for EPT even if A/D bits disabled

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Now that KVM doesn't use shadow_accessed_mask to detect if hardware A/D
bits are enabled, set shadow_accessed_mask for EPT even when A/D bits
are disabled in hardware.  This will allow using shadow_accessed_mask for
software purposes, e.g. to preserve accessed status in a non-present SPTE
acros NUMA balancing, if something like that is ever desirable.

Link: https://lore.kernel.org/r/20241011021051.1557902-11-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson
2024-10-10 19:10:42 -07:00
parent a5da5dde4b
commit 3835819fb1
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/mmu/spte.c
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@@ -419,7 +419,7 @@ void kvm_mmu_set_ept_masks(bool has_ad_bits, bool has_exec_only)
kvm_ad_enabled = has_ad_bits;
shadow_user_mask = VMX_EPT_READABLE_MASK;
shadow_accessed_mask = has_ad_bits ? VMX_EPT_ACCESS_BIT : 0ull;
shadow_accessed_mask = VMX_EPT_ACCESS_BIT;
shadow_dirty_mask = has_ad_bits ? VMX_EPT_DIRTY_BIT : 0ull;
shadow_nx_mask = 0ull;
shadow_x_mask = VMX_EPT_EXECUTABLE_MASK;