diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2017-06-13 14:46:18 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-02-22 15:31:23 +0100 |
| commit | 1caf170df9bac49bb198c424aee45f5ecced076a (patch) | |
| tree | f086efcfbcef856b6843c24145ebf0eb2d8a595a /arch/s390/include/asm | |
| parent | d5feec04fe578c8dbd9e2e1439afc2f0af761ed4 (diff) | |
s390/mm: provide base_asce_alloc() / base_asce_free() helper functions
Provide base_asce_alloc() and base_asce_free() helper functions which
can be used to allocate an ASCE and all required region, segment and
page tables required to access memory regions of the virtual kernel
address space.
Both, the ASCE and all tables, do not use any features that correspond
to e.g. enhanced DAT features. This is required for some I/O functions
that pass an ASCE, like e.g. some service call requests, but which may
not use any enhanced features.
Acked-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm')
| -rw-r--r-- | arch/s390/include/asm/pgalloc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h index c7b4333d1de0..f0f9bcf94c03 100644 --- a/arch/s390/include/asm/pgalloc.h +++ b/arch/s390/include/asm/pgalloc.h @@ -151,4 +151,7 @@ void vmem_map_init(void); void *vmem_crst_alloc(unsigned long val); pte_t *vmem_pte_alloc(void); +unsigned long base_asce_alloc(unsigned long addr, unsigned long num_pages); +void base_asce_free(unsigned long asce); + #endif /* _S390_PGALLOC_H */ |