diff options
| author | Dominik Dingel | 2014-03-24 14:27:58 +0100 |
|---|---|---|
| committer | Christian Borntraeger | 2014-04-22 09:36:27 +0200 |
| commit | a0bf4f149bbfa2e31b5f4172c817afdb7b986733 (patch) | |
| tree | ed16368e498daaf4451241b5c734368a31986b1e /arch/s390/include | |
| parent | KVM: s390/mm: use software dirty bit detection for user dirty tracking (diff) | |
| download | kernel-qcow2-linux-a0bf4f149bbfa2e31b5f4172c817afdb7b986733.tar.gz kernel-qcow2-linux-a0bf4f149bbfa2e31b5f4172c817afdb7b986733.tar.xz kernel-qcow2-linux-a0bf4f149bbfa2e31b5f4172c817afdb7b986733.zip | |
KVM: s390/mm: new gmap_test_and_clear_dirty function
For live migration kvm needs to test and clear the dirty bit of guest pages.
That for is ptep_test_and_clear_user_dirty, to be sure we are not racing with
other code, we protect the pte. This needs to be done within
the architecture memory management code.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index b2c630df0ca5..fcba5e03839f 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -838,6 +838,8 @@ unsigned long __gmap_fault(unsigned long address, struct gmap *); unsigned long gmap_fault(unsigned long address, struct gmap *); void gmap_discard(unsigned long from, unsigned long to, struct gmap *); void __gmap_zap(unsigned long address, struct gmap *); +bool gmap_test_and_clear_dirty(unsigned long address, struct gmap *); + void gmap_register_ipte_notifier(struct gmap_notifier *); void gmap_unregister_ipte_notifier(struct gmap_notifier *); |