On 04/25/2010 10:00 AM, Xiao Guangrong wrote:
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@xxxxxxxxxxxxxx>
---
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;
+ }
The calculation is really
shift = (PT32_LEVEL_BITS - PT64_LEVEL_BITS) * level;
(and please don't use a variable called offset to hold a shift count)
--
error compiling committee.c: too many arguments to function
--
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