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| author | Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> | 2010-07-16 11:23:04 +0800 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-08-02 06:40:57 +0300 |
| commit | daa3db693ce925a14b7e17ab6f306dc0e6a5342c (patch) | |
| tree | 1511926bdec125fca374320924dacce8b49d84c3 /arch | |
| parent | fa1de2bfc0feb7245328ad25fb3e6d5cd2c903b4 (diff) | |
| download | talos-obmc-linux-daa3db693ce925a14b7e17ab6f306dc0e6a5342c.tar.gz talos-obmc-linux-daa3db693ce925a14b7e17ab6f306dc0e6a5342c.zip | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index d2ea9cabc066..9b3b916ebeae 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -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); } |
