[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20241011021051.1557902-11-seanjc@google.com>
Date: Thu, 10 Oct 2024 19:10:42 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Yan Zhao <yan.y.zhao@...el.com>, Sagi Shahar <sagis@...gle.com>,
"Alex Bennée" <alex.bennee@...aro.org>, David Matlack <dmatlack@...gle.com>,
James Houghton <jthoughton@...gle.com>
Subject: [PATCH 10/18] 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.
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
arch/x86/kvm/mmu/spte.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c
index c9543625dda2..e352d1821319 100644
--- 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;
--
2.47.0.rc1.288.g06298d1525-goog
Powered by blists - more mailing lists