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authorJason J. Herne <jjherne@linux.vnet.ibm.com>2014-09-23 17:18:57 +0400
committerChristian Borntraeger <borntraeger@de.ibm.com>2014-11-28 15:58:48 +0300
commit9fcf93b5de063e5cadb95a7bd0130bf73edcd3b5 (patch)
tree5c3f3f03d464210dbd82c64b0b04a67eadadda21 /arch/s390/include
parentda00fcbdac1b00bf33b71093047e975cc1f68779 (diff)
downloadlinux-9fcf93b5de063e5cadb95a7bd0130bf73edcd3b5.tar.xz
KVM: S390: Create helper function get_guest_storage_key
Define get_guest_storage_key which can be used to get the value of a guest storage key. This compliments the functionality provided by the helper function set_guest_storage_key. Both functions are needed for live migration of s390 guests that use storage keys. Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
-rw-r--r--arch/s390/include/asm/pgalloc.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/include/asm/pgalloc.h b/arch/s390/include/asm/pgalloc.h
index d39a31c3cdf2..ede2eab42c17 100644
--- a/arch/s390/include/asm/pgalloc.h
+++ b/arch/s390/include/asm/pgalloc.h
@@ -26,6 +26,7 @@ void page_table_reset_pgste(struct mm_struct *, unsigned long, unsigned long,
bool init_skey);
int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
unsigned long key, bool nq);
+unsigned long get_guest_storage_key(struct mm_struct *mm, unsigned long addr);
static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
{