linux-stable/arch/s390/mm
David Hildenbrand a9d23e71d7 s390/mm: shadow pages with real guest requested protection
We really want to avoid manually handling protection for nested
virtualization. By shadowing pages with the protection the guest asked us
for, the SIE can handle most protection-related actions for us (e.g.
special handling for MVPG) and we can directly forward protection
exceptions to the guest.

PTEs will now always be shadowed with the correct _PAGE_PROTECT flag.
Unshadowing will take care of any guest changes to the parent PTE and
any host changes to the host PTE. If the host PTE doesn't have the
fitting access rights or is not available, we have to fix it up.

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2016-06-20 09:54:19 +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: remove 31 bit support 2015-03-25 11:49:33 +01:00
extmem.c s390: Use pr_warn instead of pr_warning 2016-03-07 13:12:04 +01:00
fault.c s390/mm: add shadow gmap support 2016-06-20 09:54:04 +02:00
gmap.c s390/mm: shadow pages with real guest requested protection 2016-06-20 09:54:19 +02:00
gup.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-04-01 07:15:54 -05:00
hugetlbpage.c s390/mm: uninline pmdp_xxx functions from pgtable.h 2016-03-08 15:00:14 +01:00
init.c s390/mm: fix asce_bits handling with dynamic pagetable levels 2016-04-21 09:50:09 +02:00
maccess.c s390/maccess: reduce stnsm instructions 2016-02-17 09:05:04 +01:00
Makefile s390/extable: use generic search and sort routines 2016-03-22 15:36:02 -07:00
mem_detect.c s390/mem_detect: use unsigned longs 2016-01-11 12:27:11 +01:00
mmap.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-05-18 12:17:16 -07:00
page-states.c s390/cmma: remove "cmma disable" code in case of dump again 2014-05-20 08:58:42 +02:00
pageattr.c s390/pageattr: do a single TLB flush for change_page_attr 2016-02-23 08:56:17 +01:00
pgalloc.c s390/mm: add shadow gmap support 2016-06-20 09:54:04 +02:00
pgtable.c s390/mm: shadow pages with real guest requested protection 2016-06-20 09:54:19 +02:00
vmem.c s390/vmem: remove unused function parameter 2016-05-11 10:20:32 +02:00