UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

KVM: MMU: fix broken page accessed tracking with ept enabled 

In current code, if ept is enabled(shadow_accessed_mask = 0), the page
accessed tracking is lost.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Xiao Guangrong 2010-07-16 11:23:04 +08:00 committed by Avi Kivity
parent fa1de2bfc0
commit daa3db693c
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/x86/kvm/mmu.c
View File

@ -687,7 +687,7 @@ static void drop_spte(struct kvm *kvm, u64 *sptep, u64 new_spte)
if (!is_rmap_spte(old_spte))
return;
pfn = spte_to_pfn(old_spte);
if (old_spte & shadow_accessed_mask)
if (!shadow_accessed_mask || old_spte & shadow_accessed_mask)
kvm_set_pfn_accessed(pfn);
if (is_writable_pte(old_spte))
kvm_set_pfn_dirty(pfn);
@ -815,7 +815,8 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, unsigned long *rmapp,
kvm_set_pfn_dirty(spte_to_pfn(*spte));
old_spte = __xchg_spte(spte, new_spte);
if (is_shadow_present_pte(old_spte)
&& (old_spte & shadow_accessed_mask))
&& (!shadow_accessed_mask ||
old_spte & shadow_accessed_mask))
mark_page_accessed(pfn_to_page(spte_to_pfn(old_spte)));
spte = rmap_next(kvm, rmapp, spte);
}