Messages in this thread Patch in this message | | | Date | Sun, 25 Apr 2010 15:00:00 +0800 | From | Xiao Guangrong <> | Subject | [PATCH v2 1/10] KVM MMU: fix for calculating gpa in invlpg code |
| |
If the guest is 32-bit, we should use 'quadrant' to adjust gpa offset
Changlog v2: - when level is PT_DIRECTORY_LEVEL, the 'offset' should be 'role.quadrant << 8', thanks Avi for point it out
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> --- arch/x86/kvm/paging_tmpl.h | 13 +++++++++++-- 1 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index d0cc07e..83cc72f 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -478,9 +478,18 @@ 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 = 0; + + if (PTTYPE == 32) { + if (level == PT_DIRECTORY_LEVEL) + offset = PAGE_SHIFT - 4; + else + offset = PT64_LEVEL_BITS; + offset = sp->role.quadrant << offset; + } pte_gpa = (sp->gfn << PAGE_SHIFT); - pte_gpa += (sptep - sp->spt) * sizeof(pt_element_t); + pte_gpa += (sptep - sp->spt + offset) * + sizeof(pt_element_t); if (is_shadow_present_pte(*sptep)) { rmap_remove(vcpu->kvm, sptep); -- 1.6.1.2
| |