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authorAvi Kivity <avi@qumranet.com>2007-05-31 18:20:14 +0300
committerAvi Kivity <avi@qumranet.com>2007-07-16 12:05:44 +0300
commitfd97dc516c372982f9c3637e20b131e1f55ac2f6 (patch)
tree40c86e7691de599286daeebaa942d0392e54e1dd /drivers
parent4436d466219a6a7874ebc19eb6523c3a9a280dcc (diff)
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/kvm/mmu.c5
-rw-r--r--drivers/kvm/paging_tmpl.h7
2 files changed, 2 insertions, 10 deletions
diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c
index f24b540148a..b47391ffe54 100644
--- a/drivers/kvm/mmu.c
+++ b/drivers/kvm/mmu.c
@@ -91,11 +91,6 @@ static int dbg = 1;
#define PT32_DIR_PSE36_MASK (((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
-#define PT32_PTE_COPY_MASK \
- (PT_PRESENT_MASK | PT_ACCESSED_MASK | PT_DIRTY_MASK | PT_GLOBAL_MASK)
-
-#define PT64_PTE_COPY_MASK (PT64_NX_MASK | PT32_PTE_COPY_MASK)
-
#define PT_FIRST_AVAIL_BITS_SHIFT 9
#define PT64_SECOND_AVAIL_BITS_SHIFT 52
diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
index 59b4cb29e0f..b17a4b783cd 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