diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-07-01 12:17:41 +0200 |
|---|---|---|
| committer | Cornelia Huck <cornelia.huck@de.ibm.com> | 2014-07-08 15:08:03 +0200 |
| commit | f2879a5c9e45e8432d15deea84fdf53586e9949c (patch) | |
| tree | 4f4737fa7539d8ceb47c615502a69c98426ddcf1 /pc-bios/s390-ccw/bootmap.c | |
| parent | eaa4980185943da6e36f6f2e052d41924705e1ea (diff) | |
pc-bios/s390-ccw: store proper subsystem information word
POP chapter 17 requires to store a subsystem information word at 184
during IPL. Furthermore bytes 188-191 should be zero. The bootmap might
contain data blocks that are written to the first page. We have to
write these values after we processed the bootmap and before the final
IPL.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'pc-bios/s390-ccw/bootmap.c')
| -rw-r--r-- | pc-bios/s390-ccw/bootmap.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index fa54abb4d3..f1756796df 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -51,6 +51,8 @@ static void jump_to_IPL_2(void) static void jump_to_IPL_code(uint64_t address) { + /* store the subsystem information _after_ the bootmap was loaded */ + write_subsystem_identification(); /* * The IPL PSW is at address 0. We also must not overwrite the * content of non-BIOS memory after we loaded the guest, so we |