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s390/chsc: Add exception handler for CHSC instruction

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am: dc31841fcd

Change-Id: I8319561164624bb5257953980b634c1b1433cc85
This commit is contained in:
Peter Oberparleiter
2017-03-15 02:20:01 +00:00
committed by android-build-merger
parent 84872e1cda dc31841fcd
commit 7f8383d4a5
1 changed files with 5 additions and 3 deletions
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8
drivers/s390/cio/ioasm.c
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@@ -165,13 +165,15 @@ int tpi(struct tpi_info *addr)
int chsc(void *chsc_area)
{
typedef struct { char _[4096]; } addr_type;
int cc;
int cc = -EIO;
asm volatile(
" .insn rre,0xb25f0000,%2,0\n"
" ipm %0\n"
"0: ipm %0\n"
" srl %0,28\n"
: "=d" (cc), "=m" (*(addr_type *) chsc_area)
"1:\n"
EX_TABLE(0b, 1b)
: "+d" (cc), "=m" (*(addr_type *) chsc_area)
: "d" (chsc_area), "m" (*(addr_type *) chsc_area)
: "cc");
trace_s390_cio_chsc(chsc_area, cc);