From 22c9b2d166a88573a933e8d355833d36579d83be Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Wed, 28 Apr 2010 11:54:44 +0800 Subject: [PATCH] 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 Signed-off-by: Marcelo Tosatti --- arch/x86/kvm/paging_tmpl.h | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index d0cc07eb6eda..3464fdbdb98f 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -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)) {