diff options
| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2016-05-10 09:50:21 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-06-10 12:07:31 +0200 |
| commit | a7e19ab55ffdd82f1a8d12694b9a0c0beeef534c (patch) | |
| tree | 77c52e6a73a3a871caaba0a0e7b7eda3789fa53a /arch/s390/include/asm/page.h | |
| parent | KVM: s390: trace and count all skey intercepts (diff) | |
| download | linux-a7e19ab55ffdd82f1a8d12694b9a0c0beeef534c.tar.xz linux-a7e19ab55ffdd82f1a8d12694b9a0c0beeef534c.zip | |
KVM: s390: handle missing storage-key facility
Without the storage-key facility, SIE won't interpret SSKE, ISKE and
RRBE for us. So let's add proper interception handlers that will be called
if lazy sske cannot be enabled.
Reviewed-by: Christian Borntraeger <borntraeger@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/page.h')
| -rw-r--r-- | arch/s390/include/asm/page.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/s390/include/asm/page.h b/arch/s390/include/asm/page.h index 53eacbd4f09b..f874e7d51c19 100644 --- a/arch/s390/include/asm/page.h +++ b/arch/s390/include/asm/page.h @@ -109,13 +109,14 @@ static inline unsigned char page_get_storage_key(unsigned long addr) static inline int page_reset_referenced(unsigned long addr) { - unsigned int ipm; + int cc; asm volatile( " rrbe 0,%1\n" " ipm %0\n" - : "=d" (ipm) : "a" (addr) : "cc"); - return !!(ipm & 0x20000000); + " srl %0,28\n" + : "=d" (cc) : "a" (addr) : "cc"); + return cc; } /* Bits int the storage key */ |