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/pgtable.h | |
| parent | s390/mm: flush tlb of shadows in all situations (diff) | |
| download | linux-dev-a9d23e71d7716e394a772686bfd994f4e181b235.tar.xz linux-dev-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/pgtable.h')
| -rw-r--r-- | arch/s390/include/asm/pgtable.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index a6e7fc8f5b49..c7ebba483f09 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -895,7 +895,7 @@ void ptep_zap_unused(struct mm_struct *mm, unsigned long addr, pte_t *ptep , int reset); void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep); int ptep_shadow_pte(struct mm_struct *mm, unsigned long saddr, - pte_t *sptep, pte_t *tptep, int write); + pte_t *sptep, pte_t *tptep, pte_t pte); void ptep_unshadow_pte(struct mm_struct *mm, unsigned long saddr, pte_t *ptep); bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long address); |