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KVM: MMU: Merge shadow level check in FNAME(fetch)

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Remove the redundant level check when fetching
shadow pte for present & non-present spte.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Dong, Eddie 2008-01-02 14:29:08 +08:00 committed by Avi Kivity
parent eb787d10af
commit 5882842f9b
1 changed files with 2 additions and 5 deletions
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7
arch/x86/kvm/paging_tmpl.h
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@ -300,16 +300,13 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
bool new_page = 0; bool new_page = 0;
shadow_ent = ((u64 *)__va(shadow_addr)) + index; shadow_ent = ((u64 *)__va(shadow_addr)) + index;
if (level == PT_PAGE_TABLE_LEVEL)
break;
if (is_shadow_present_pte(*shadow_ent)) { if (is_shadow_present_pte(*shadow_ent)) {
if (level == PT_PAGE_TABLE_LEVEL)
break;
shadow_addr = *shadow_ent & PT64_BASE_ADDR_MASK; shadow_addr = *shadow_ent & PT64_BASE_ADDR_MASK;
continue; continue;
} }
if (level == PT_PAGE_TABLE_LEVEL)
break;
if (level - 1 == PT_PAGE_TABLE_LEVEL if (level - 1 == PT_PAGE_TABLE_LEVEL
&& walker->level == PT_DIRECTORY_LEVEL) { && walker->level == PT_DIRECTORY_LEVEL) {
metaphysical = 1; metaphysical = 1;