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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-11-17 12:11:41 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-01-12 11:29:27 +0200 |
| commit | e730b63cc083852551b092e1c93f0ef22c25f220 (patch) | |
| tree | 9bd7c6a96f38e8fe925a6cac855e5aaa549985ba /arch | |
| parent | 49f481720438bbd0138218b0bcb494c3512a454f (diff) | |
| download | blackbird-op-linux-e730b63cc083852551b092e1c93f0ef22c25f220.tar.gz blackbird-op-linux-e730b63cc083852551b092e1c93f0ef22c25f220.zip | |
KVM: MMU: don't mark spte notrap if reserved bit set
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/paging_tmpl.h | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index ba00eefa7bcd..590bf1223cb4 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -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; |
