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| author | Heiko Carstens <hca@linux.ibm.com> | 2021-06-14 18:55:07 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-06-18 16:41:23 +0200 |
| commit | 9e2509265560a7b82cecfd39caae5cf7d62e59f3 (patch) | |
| tree | 1a5eb4d8696f5a4413e8184645191cc2744b8598 /arch/s390/boot | |
| parent | 88c2510cecb7e2b518e3c4fdf3cf0e13ebe9377c (diff) | |
| download | linux-9e2509265560a7b82cecfd39caae5cf7d62e59f3.tar.gz | |
s390/ipl_parm: use register pair instead of register asm
...and slightly cleanup the inline asm. Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/ipl_parm.c | 26 |
1 files changed, 14 insertions, 12 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 6bf17c623770..0f84c072625e 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -25,29 +25,31 @@ int kaslr_enabled; static inline int __diag308(unsigned long subcode, void *addr) { - register unsigned long _addr asm("0") = (unsigned long)addr; - register unsigned long _rc asm("1") = 0; unsigned long reg1, reg2; + union register_pair r1; psw_t old; + r1.even = (unsigned long) addr; + r1.odd = 0; asm volatile( " mvc 0(16,%[psw_old]),0(%[psw_pgm])\n" - " epsw %0,%1\n" - " st %0,0(%[psw_pgm])\n" - " st %1,4(%[psw_pgm])\n" - " larl %0,1f\n" - " stg %0,8(%[psw_pgm])\n" - " diag %[addr],%[subcode],0x308\n" + " epsw %[reg1],%[reg2]\n" + " st %[reg1],0(%[psw_pgm])\n" + " st %[reg2],4(%[psw_pgm])\n" + " larl %[reg1],1f\n" + " stg %[reg1],8(%[psw_pgm])\n" + " diag %[r1],%[subcode],0x308\n" "1: mvc 0(16,%[psw_pgm]),0(%[psw_old])\n" - : "=&d" (reg1), "=&a" (reg2), + : [r1] "+&d" (r1.pair), + [reg1] "=&d" (reg1), + [reg2] "=&a" (reg2), "+Q" (S390_lowcore.program_new_psw), - "=Q" (old), - [addr] "+d" (_addr), "+d" (_rc) + "=Q" (old) : [subcode] "d" (subcode), [psw_old] "a" (&old), [psw_pgm] "a" (&S390_lowcore.program_new_psw) : "cc", "memory"); - return _rc; + return r1.odd; } void store_ipl_parmblock(void) |