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s390/sigp: use register pair instead of register asm

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Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-06-09 22:59:13 +02:00 committed by Vasily Gorbik
parent 6a7b4e4ee1
commit 25130c1a9e
1 changed files with 8 additions and 6 deletions
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14
arch/s390/include/asm/sigp.h
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@ -41,15 +41,17 @@
static inline int ____pcpu_sigp(u16 addr, u8 order, unsigned long parm,
u32 *status)
{
register unsigned long reg1 asm ("1") = parm;
union register_pair r1 = { .odd = parm, };
int cc;
asm volatile(
" sigp %1,%2,0(%3)\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc), "+d" (reg1) : "d" (addr), "a" (order) : "cc");
*status = reg1;
" sigp %[r1],%[addr],0(%[order])\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=&d" (cc), [r1] "+&d" (r1.pair)
: [addr] "d" (addr), [order] "a" (order)
: "cc");
*status = r1.even;
return cc;
}