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| author | Ingo Molnar <mingo@kernel.org> | 2016-04-19 08:38:52 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-19 08:38:52 (GMT) |
| commit | 6666ea558b1f4134291c15ac59366f69c2d1f321 (patch) | |
| tree | 99e4204b51e69a12721123d3bb1912f6ca0a2726 /arch/x86/kvm/mmu.c | |
| parent | 91ed140d6c1e168b11bbbddac4f6066f40a0c6b5 (diff) | |
| parent | c3b46c73264b03000d1e18b22f5caf63332547c9 (diff) | |
| download | linux-6666ea558b1f4134291c15ac59366f69c2d1f321.tar.xz | |
Merge tag 'v4.6-rc4' into x86/asm, to pick up fixes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kvm/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index bc1e0b6..4c6972f 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -557,8 +557,15 @@ static bool mmu_spte_update(u64 *sptep, u64 new_spte) !is_writable_pte(new_spte)) ret = true; - if (!shadow_accessed_mask) + if (!shadow_accessed_mask) { + /* + * We don't set page dirty when dropping non-writable spte. + * So do it now if the new spte is becoming non-writable. + */ + if (ret) + kvm_set_pfn_dirty(spte_to_pfn(old_spte)); return ret; + } /* * Flush TLB when accessed/dirty bits are changed in the page tables, @@ -605,7 +612,8 @@ static int mmu_spte_clear_track_bits(u64 *sptep) if (!shadow_accessed_mask || old_spte & shadow_accessed_mask) kvm_set_pfn_accessed(pfn); - if (!shadow_dirty_mask || (old_spte & shadow_dirty_mask)) + if (old_spte & (shadow_dirty_mask ? shadow_dirty_mask : + PT_WRITABLE_MASK)) kvm_set_pfn_dirty(pfn); return 1; } |