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