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KVM: s390: Add proper dirty bitmap support to S390 kvm.

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Replace the kvm_s390_sync_dirty_log() stub with code to construct the KVM
dirty_bitmap from S390 memory change bits.  Also add code to properly clear
the dirty_bitmap size when clearing the bitmap.

Signed-off-by: Jason J. Herne <[email protected]>
CC: Dominik Dingel <[email protected]>
[Dominik Dingel: use gmap_test_and_clear_dirty, locking fixes]
Signed-off-by: Christian Borntraeger <[email protected]>
This commit is contained in:
Jason J. Herne 2012-08-02 10:10:17 -04:00 • committed by Christian Borntraeger
commit 15f36ebd34
2 changed files with 50 additions and 3 deletions
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2
virt/kvm/kvm_main.c
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@ -637,14 +637,12 @@ static int kvm_vm_release(struct inode *inode, struct file *filp)
*/
static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
{
#ifndef CONFIG_S390
unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes);
if (!memslot->dirty_bitmap)
return -ENOMEM;
#endif /* !CONFIG_S390 */
return 0;
}