KVM: VMX: Always return old for clear_flush_young() when using EPT

As well as discard fake accessed bit and dirty bit of EPT.

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

3 files changed, 5 insertions, 4 deletions

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 0bfe2bd305eb..3da2508eb22a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -711,6 +711,10 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp)
         u64 *spte;
         int young = 0;
 
+        /* always return old for EPT */
+        if (!shadow_accessed_mask)
+                return 0;
+
         spte = rmap_next(kvm, rmapp, NULL);
         while (spte) {
                 int _young;
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 2a69773e3b26..7041cc52b562 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3301,8 +3301,7 @@ static int __init vmx_init(void)
                 kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
                         VMX_EPT_WRITABLE_MASK |
                         VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
-                kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
-                                VMX_EPT_FAKE_DIRTY_MASK, 0ull,
+                kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
                                 VMX_EPT_EXECUTABLE_MASK);
                 kvm_enable_tdp();
         } else
diff --git a/arch/x86/kvm/vmx.h b/arch/x86/kvm/vmx.h
index 425a13436b3f..23e8373507ad 100644
--- a/arch/x86/kvm/vmx.h
+++ b/arch/x86/kvm/vmx.h
@@ -370,8 +370,6 @@ enum vmcs_field {
 #define VMX_EPT_READABLE_MASK                   0x1ull
 #define VMX_EPT_WRITABLE_MASK                   0x2ull
 #define VMX_EPT_EXECUTABLE_MASK                 0x4ull
-#define VMX_EPT_FAKE_ACCESSED_MASK              (1ull << 62)
-#define VMX_EPT_FAKE_DIRTY_MASK                 (1ull << 63)
 
 #define VMX_EPT_IDENTITY_PAGETABLE_ADDR         0xfffbc000ul