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authorJérôme Glisse <jglisse@redhat.com>2017-08-31 17:17:37 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2017-08-31 16:13:00 -0700
commitfb1522e099f0c69f36655af233a64e3f55941f5b (patch)
treefa8f0545ef52dadf403060a0a9a61dee5860af84 /virt
parenta81461b0546cbf57128f34e3dd6013bcdbdf0371 (diff)
KVM: update to new mmu_notifier semantic v2
Calls to mmu_notifier_invalidate_page() were replaced by calls to mmu_notifier_invalidate_range() and are now bracketed by calls to mmu_notifier_invalidate_range_start()/end() Remove now useless invalidate_page callback. Changed since v1 (Linus Torvalds) - remove now useless kvm_arch_mmu_notifier_invalidate_page() Signed-off-by: Jérôme Glisse <jglisse@redhat.com> Tested-by: Mike Galbraith <efault@gmx.de> Tested-by: Adam Borowski <kilobyte@angband.pl> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: kvm@vger.kernel.org Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andrea Arcangeli <aarcange@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/kvm_main.c42
1 files changed, 0 insertions, 42 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 15252d723b54..4d81f6ded88e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -322,47 +322,6 @@ static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn)
return container_of(mn, struct kvm, mmu_notifier);
}
-static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn,
- struct mm_struct *mm,
- unsigned long address)
-{
- struct kvm *kvm = mmu_notifier_to_kvm(mn);
- int need_tlb_flush, idx;
-
- /*
- * When ->invalidate_page runs, the linux pte has been zapped
- * already but the page is still allocated until
- * ->invalidate_page returns. So if we increase the sequence
- * here the kvm page fault will notice if the spte can't be
- * established because the page is going to be freed. If
- * instead the kvm page fault establishes the spte before
- * ->invalidate_page runs, kvm_unmap_hva will release it
- * before returning.
- *
- * The sequence increase only need to be seen at spin_unlock
- * time, and not at spin_lock time.
- *
- * Increasing the sequence after the spin_unlock would be
- * unsafe because the kvm page fault could then establish the
- * pte after kvm_unmap_hva returned, without noticing the page
- * is going to be freed.
- */
- idx = srcu_read_lock(&kvm->srcu);
- spin_lock(&kvm->mmu_lock);
-
- kvm->mmu_notifier_seq++;
- need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty;
- /* we've to flush the tlb before the pages can be freed */
- if (need_tlb_flush)
- kvm_flush_remote_tlbs(kvm);
-
- spin_unlock(&kvm->mmu_lock);
-
- kvm_arch_mmu_notifier_invalidate_page(kvm, address);
-
- srcu_read_unlock(&kvm->srcu, idx);
-}
-
static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn,
struct mm_struct *mm,
unsigned long address,
@@ -510,7 +469,6 @@ static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
}
static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
- .invalidate_page = kvm_mmu_notifier_invalidate_page,
.invalidate_range_start = kvm_mmu_notifier_invalidate_range_start,
.invalidate_range_end = kvm_mmu_notifier_invalidate_range_end,
.clear_flush_young = kvm_mmu_notifier_clear_flush_young,