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

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>

diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c
index c9543625dda2aabb04dfaf8c2ebda8588c81ba81..e352d182131903d82dee4f9b18a06b2af1945f6a 100644 (file)
--- a/arch/x86/kvm/mmu/spte.c
+++ b/arch/x86/kvm/mmu/spte.c
@@ -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;