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authorHeiko Carstens <heiko.carstens@de.ibm.com>2012-09-10 16:14:33 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-04-23 10:18:02 +0200
commitc5034945ce59abacdd02c5eff29f4f54df197880 (patch)
treed27a68a9ac388e13e1af097c338a162ca647f7b0 /arch/s390/include
parent4e4d035a928340e828f633059b735901584c67a7 (diff)
s390/mm,gmap: implement gmap_translate()
Implement gmap_translate() function which translates a guest absolute address to a user space process address without establishing the guest page table entries. This is useful for kvm guest address translations where no memory access is expected to happen soon (e.g. tprot exception handler). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/pgtable.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h
index 4a5443118cf..fda82d6c7c8 100644
--- a/arch/s390/include/asm/pgtable.h
+++ b/arch/s390/include/asm/pgtable.h
@@ -760,6 +760,8 @@ void gmap_disable(struct gmap *gmap);
int gmap_map_segment(struct gmap *gmap, unsigned long from,
unsigned long to, unsigned long length);
int gmap_unmap_segment(struct gmap *gmap, unsigned long to, unsigned long len);
+unsigned long __gmap_translate(unsigned long address, struct gmap *);
+unsigned long gmap_translate(unsigned long address, struct gmap *);
unsigned long __gmap_fault(unsigned long address, struct gmap *);
unsigned long gmap_fault(unsigned long address, struct gmap *);
void gmap_discard(unsigned long from, unsigned long to, struct gmap *);