KVM: MMU: Simpify accessed/dirty/present/nx bit handling

Always set the accessed and dirty bit (since having them cleared causes
a read-modify-write cycle), always set the present bit, and copy the
nx bit from the guest.

Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 59b4cb29e0f7..b17a4b783cd4 100644
--- a/drivers/kvm/paging_tmpl.h
+++ b/drivers/kvm/paging_tmpl.h
@@ -31,7 +31,6 @@
         #define PT_INDEX(addr, level) PT64_INDEX(addr, level)
         #define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level)
         #define PT_LEVEL_MASK(level) PT64_LEVEL_MASK(level)
-        #define PT_PTE_COPY_MASK PT64_PTE_COPY_MASK
         #ifdef CONFIG_X86_64
         #define PT_MAX_FULL_LEVELS 4
         #else
@@ -46,7 +45,6 @@
         #define PT_INDEX(addr, level) PT32_INDEX(addr, level)
         #define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level)
         #define PT_LEVEL_MASK(level) PT32_LEVEL_MASK(level)
-        #define PT_PTE_COPY_MASK PT32_PTE_COPY_MASK
         #define PT_MAX_FULL_LEVELS 2
 #else
         #error Invalid PTTYPE value
@@ -219,7 +217,8 @@ static void FNAME(set_pte_common)(struct kvm_vcpu *vcpu,
                 FNAME(mark_pagetable_dirty)(vcpu->kvm, walker);
         }
 
-        spte |= *gpte & PT_PTE_COPY_MASK;
+        spte |= PT_PRESENT_MASK | PT_ACCESSED_MASK | PT_DIRTY_MASK;
+        spte |= *gpte & PT64_NX_MASK;
         spte |= access_bits << PT_SHADOW_BITS_OFFSET;
         if (!dirty)
                 access_bits &= ~PT_WRITABLE_MASK;
@@ -495,7 +494,5 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr)
 #undef PT_INDEX
 #undef SHADOW_PT_INDEX
 #undef PT_LEVEL_MASK
-#undef PT_PTE_COPY_MASK
-#undef PT_NON_PTE_COPY_MASK
 #undef PT_DIR_BASE_ADDR_MASK
 #undef PT_MAX_FULL_LEVELS