diff options
Diffstat (limited to 'drivers/kvm/kvm_main.c')
| -rw-r--r-- | drivers/kvm/kvm_main.c | 24 |
1 files changed, 7 insertions, 17 deletions
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c index 5dc601702782..55639aceca63 100644 --- a/drivers/kvm/kvm_main.c +++ b/drivers/kvm/kvm_main.c @@ -916,28 +916,18 @@ struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) } EXPORT_SYMBOL_GPL(gfn_to_page); +/* WARNING: Does not work on aliased pages. */ void mark_page_dirty(struct kvm *kvm, gfn_t gfn) { - int i; struct kvm_memory_slot *memslot; - unsigned long rel_gfn; - for (i = 0; i < kvm->nmemslots; ++i) { - memslot = &kvm->memslots[i]; + memslot = __gfn_to_memslot(kvm, gfn); + if (memslot && memslot->dirty_bitmap) { + unsigned long rel_gfn = gfn - memslot->base_gfn; - if (gfn >= memslot->base_gfn - && gfn < memslot->base_gfn + memslot->npages) { - - if (!memslot->dirty_bitmap) - return; - - rel_gfn = gfn - memslot->base_gfn; - - /* avoid RMW */ - if (!test_bit(rel_gfn, memslot->dirty_bitmap)) - set_bit(rel_gfn, memslot->dirty_bitmap); - return; - } + /* avoid RMW */ + if (!test_bit(rel_gfn, memslot->dirty_bitmap)) + set_bit(rel_gfn, memslot->dirty_bitmap); } } |