diff options
| author | Jason J. Herne <jjherne@linux.ibm.com> | 2019-04-04 10:34:34 -0400 |
|---|---|---|
| committer | Thomas Huth <thuth@redhat.com> | 2019-04-12 12:40:35 +0200 |
| commit | efa47d36da89f4b23c315a7cc085fab0d15eb47c (patch) | |
| tree | 69bee6340357bcd7b5684970a232bb786032e94f /pc-bios/s390-ccw/s390-arch.h | |
| parent | 69333c36dc85b84b021766747cffc2b53df93ae8 (diff) | |
s390-bios: Support booting from real dasd device
Allows guest to boot from a vfio configured real dasd device.
Signed-off-by: Jason J. Herne <jjherne@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <1554388475-18329-16-git-send-email-jjherne@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Diffstat (limited to 'pc-bios/s390-ccw/s390-arch.h')
| -rw-r--r-- | pc-bios/s390-ccw/s390-arch.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/s390-arch.h b/pc-bios/s390-ccw/s390-arch.h index 5e92c7a27d..504fc7c2f0 100644 --- a/pc-bios/s390-ccw/s390-arch.h +++ b/pc-bios/s390-ccw/s390-arch.h @@ -87,4 +87,17 @@ typedef struct LowCore { extern LowCore const *lowcore; +static inline void set_prefix(uint32_t address) +{ + asm volatile("spx %0" : : "m" (address) : "memory"); +} + +static inline uint32_t store_prefix(void) +{ + uint32_t address; + + asm volatile("stpx %0" : "=m" (address)); + return address; +} + #endif |