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s390/sthyi: 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 dda74578e7
commit 6a7b4e4ee1
1 changed files with 6 additions and 7 deletions
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13
arch/s390/kernel/sthyi.c
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@ -395,19 +395,18 @@ static void fill_diag(struct sthyi_sctns *sctns)
static int sthyi(u64 vaddr, u64 *rc)
{
register u64 code asm("0") = 0;
register u64 addr asm("2") = vaddr;
register u64 rcode asm("3");
union register_pair r1 = { .even = 0, }; /* subcode */
union register_pair r2 = { .even = vaddr, };
int cc;
asm volatile(
".insn rre,0xB2560000,%[code],%[addr]\n"
".insn rre,0xB2560000,%[r1],%[r2]\n"
"ipm %[cc]\n"
"srl %[cc],28\n"
: [cc] "=d" (cc), "=d" (rcode)
: [code] "d" (code), [addr] "a" (addr)
: [cc] "=&d" (cc), [r2] "+&d" (r2.pair)
: [r1] "d" (r1.pair)
: "memory", "cc");
*rc = rcode;
*rc = r2.odd;
return cc;
}