linux/arch/s390/mm
Martin Schwidefsky 0a61b222df KVM: s390/mm: use software dirty bit detection for user dirty tracking
Switch the user dirty bit detection used for migration from the hardware
provided host change-bit in the pgste to a fault based detection method.
This reduced the dependency of the host from the storage key to a point
where it becomes possible to enable the RCP bypass for KVM guests.

The fault based dirty detection will only indicate changes caused
by accesses via the guest address space. The hardware based method
can detect all changes, even those caused by I/O or accesses via the
kernel page table. The KVM/qemu code needs to take this into account.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-04-22 09:36:26 +02:00
..
cmm.c s390: convert use of typedef ctl_table to struct ctl_table 2013-10-28 08:36:25 +01:00
dump_pagetables.c s390/mm: cleanup page table definitions 2013-08-22 12:20:06 +02:00
extable.c s390/exceptions: switch to relative exception table entries 2012-09-26 15:45:10 +02:00
extmem.c s390/comments: unify copyright messages and remove file names 2012-07-20 11:15:04 +02:00
fault.c s390/mm: print control registers and page table walk on crash 2014-04-09 10:19:13 +02:00
gup.c s390/gup: handle zero nr_pages case correctly 2013-10-24 17:17:01 +02:00
hugetlbpage.c s390/mm,tlb: optimize TLB flushing for zEC12 2014-04-03 14:31:00 +02:00
init.c s390/mm,tlb: optimize TLB flushing for zEC12 2014-04-03 14:31:00 +02:00
maccess.c s390/uaccess: remove copy_from_user_real() 2014-02-24 17:14:00 +01:00
Makefile s390/mem_detect: move memory detection code to mm folder 2013-05-02 15:50:22 +02:00
mem_detect.c s390/mem_detect: fix memory hole handling 2013-06-19 15:36:16 +02:00
mmap.c s390/mmap: randomize mmap base for bottom up direction 2013-11-13 12:09:08 +09:00
page-states.c s390/dump: Fix dump memory detection 2014-02-04 15:39:51 +01:00
pageattr.c s390/mm: do not initialize storage keys 2013-10-24 17:17:00 +02:00
pgtable.c KVM: s390/mm: use software dirty bit detection for user dirty tracking 2014-04-22 09:36:26 +02:00
vmem.c s390/mm,tlb: optimize TLB flushing for zEC12 2014-04-03 14:31:00 +02:00