haraldwolff
/
qemu-patch-raspberry4
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

s390-ccw: force diag 308 subcode to unsigned long 

We currently pass an integer as the subcode parameter. However,
the upper bits of the register containing the subcode need to
be 0, which is not guaranteed unless we explicitly specify the
subcode to be an unsigned long value.

Fixes: d046c51dad ("pc-bios/s390-ccw: Get device address via diag 308/6")
Cc: qemu-stable@nongnu.org
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
stable-3.0
Cornelia Huck 2018-05-02 14:52:21 +02:00 committed by Thomas Huth
parent c4942ee942
commit 63d8b5ace3
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
pc-bios/s390-ccw/iplb.h
View File

@ -101,10 +101,11 @@ static inline bool manage_iplb(IplParameterBlock *iplb, bool store)
{
register unsigned long addr asm("0") = (unsigned long) iplb;
register unsigned long rc asm("1") = 0;
unsigned long subcode = store ? 6 : 5;
asm volatile ("diag %0,%2,0x308\n"
: "+d" (addr), "+d" (rc)
: "d" (store ? 6 : 5)
: "d" (subcode)
: "memory", "cc");
return rc == 0x01;
}