diff options
| author | Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> | 2010-04-12 19:35:35 +0900 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-26 07:41:37 -0700 |
| commit | 7bb44401c583e795561400230b58d87e9093ac0b (patch) | |
| tree | 8fd97b6bb60518164d494ce1dbf89485e4da2021 /include | |
| parent | 3218dbfc167377d6908390635102917d3b66e5ac (diff) | |
KVM: fix the handling of dirty bitmaps to avoid overflows
(Cherry-picked from commit 87bf6e7de1134f48681fd2ce4b7c1ec45458cb6d)
Int is not long enough to store the size of a dirty bitmap.
This patch fixes this problem with the introduction of a wrapper
function to calculate the sizes of dirty bitmaps.
Note: in mark_page_dirty(), we have to consider the fact that
__set_bit() takes the offset as int, not long.
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index b7bbb5ddd7a..1e4e3bc3e72 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -116,6 +116,11 @@ struct kvm_memory_slot { int user_alloc; }; +static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot) +{ + return ALIGN(memslot->npages, BITS_PER_LONG) / 8; +} + struct kvm_kernel_irq_routing_entry { u32 gsi; u32 type; |