Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

KVM: MMU: don't mark spte notrap if reserved bit set

Browse source 
If reserved bit is set, we need inject the #PF with PFEC.RSVD=1,
but shadow_notrap_nonpresent_pte injects #PF with PFEC.RSVD=0 only

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Xiao Guangrong 2010-11-17 12:11:41 +08:00 committed by Avi Kivity
parent 49f4817204
commit e730b63cc0
1 changed files with 11 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
arch/x86/kvm/paging_tmpl.h
View file

@ -395,8 +395,10 @@ static void FNAME(pte_prefetch)(struct kvm_vcpu *vcpu, struct guest_walker *gw,
gpte = gptep[i];
if (!is_present_gpte(gpte) ||
is_rsvd_bits_set(mmu, gpte, PT_PAGE_TABLE_LEVEL)) {
if (is_rsvd_bits_set(mmu, gpte, PT_PAGE_TABLE_LEVEL))
continue;
if (!is_present_gpte(gpte)) {
if (!sp->unsync)
__set_spte(spte, shadow_notrap_nonpresent_pte);
continue;
@ -760,6 +762,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
pt_element_t gpte;
gpa_t pte_gpa;
gfn_t gfn;
bool rsvd_bits_set;
if (!is_shadow_present_pte(sp->spt[i]))
continue;
@ -771,12 +774,14 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
return -EINVAL;
gfn = gpte_to_gfn(gpte);
if (is_rsvd_bits_set(&vcpu->arch.mmu, gpte, PT_PAGE_TABLE_LEVEL)
|| gfn != sp->gfns[i] || !is_present_gpte(gpte)
|| !(gpte & PT_ACCESSED_MASK)) {
rsvd_bits_set = is_rsvd_bits_set(&vcpu->arch.mmu, gpte,
PT_PAGE_TABLE_LEVEL);
if (rsvd_bits_set || gfn != sp->gfns[i] ||
!is_present_gpte(gpte) || !(gpte & PT_ACCESSED_MASK)) {
u64 nonpresent;
if (is_present_gpte(gpte) || !clear_unsync)
if (rsvd_bits_set || is_present_gpte(gpte) ||
!clear_unsync)
nonpresent = shadow_trap_nonpresent_pte;
else
nonpresent = shadow_notrap_nonpresent_pte;