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KVM: MMU: fix for calculating gpa in invlpg code 

If the guest is 32-bit, we should use 'quadrant' to adjust gpa
offset

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Xiao Guangrong 2010-04-28 11:54:44 +08:00 committed by Avi Kivity
parent 329d20ba45
commit 22c9b2d166
1 changed files with 6 additions and 1 deletions
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7
arch/x86/kvm/paging_tmpl.h
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@ -478,8 +478,13 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
((level == PT_DIRECTORY_LEVEL && is_large_pte(*sptep))) ||
((level == PT_PDPE_LEVEL && is_large_pte(*sptep)))) {
struct kvm_mmu_page *sp = page_header(__pa(sptep));
int offset, shift;
pte_gpa = (sp->gfn << PAGE_SHIFT);
shift = PAGE_SHIFT -
(PT_LEVEL_BITS - PT64_LEVEL_BITS) * level;
offset = sp->role.quadrant << shift;
pte_gpa = (sp->gfn << PAGE_SHIFT) + offset;
pte_gpa += (sptep - sp->spt) * sizeof(pt_element_t);
if (is_shadow_present_pte(*sptep)) {