diff options
| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2016-03-08 12:21:41 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-20 09:54:19 +0200 |
| commit | a9d23e71d7716e394a772686bfd994f4e181b235 (patch) | |
| tree | 1eb27541f5c1b5c3d9bf504e3cd9306d10b19adb /arch/s390/include/asm/gmap.h | |
| parent | eea3678d4334925bf838e6f4bc88760811a84cd6 (diff) | |
| download | blackbird-op-linux-a9d23e71d7716e394a772686bfd994f4e181b235.tar.gz blackbird-op-linux-a9d23e71d7716e394a772686bfd994f4e181b235.zip | |
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>
Diffstat (limited to 'arch/s390/include/asm/gmap.h')
| -rw-r--r-- | arch/s390/include/asm/gmap.h | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/s390/include/asm/gmap.h b/arch/s390/include/asm/gmap.h index 58e65ee5b2d2..4a47055f58d7 100644 --- a/arch/s390/include/asm/gmap.h +++ b/arch/s390/include/asm/gmap.h @@ -110,8 +110,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt); int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt); int gmap_shadow_pgt_lookup(struct gmap *sg, unsigned long saddr, unsigned long *pgt, int *dat_protection); -int gmap_shadow_page(struct gmap *sg, unsigned long saddr, - unsigned long paddr, int write); +int gmap_shadow_page(struct gmap *sg, unsigned long saddr, pte_t pte); void gmap_register_pte_notifier(struct gmap_notifier *); void gmap_unregister_pte_notifier(struct gmap_notifier *); |
