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[S390] Add exception handler for diagnose 224 

To be able to run with the diagnose 224 switched off, a potential
specification exception has to be handled.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2007-05-31 17:38:01 +02:00 committed by Martin Schwidefsky
parent 3f0a6766e0
commit c41d4e3e68
1 changed files with 14 additions and 3 deletions
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17
arch/s390/hypfs/hypfs_diag.c
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@ -481,9 +481,17 @@ out:
/* Diagnose 224 functions */
static void diag224(void *ptr)
static int diag224(void *ptr)
{
asm volatile("diag %0,%1,0x224" : :"d" (0), "d"(ptr) : "memory");
int rc = -ENOTSUPP;
asm volatile(
" diag %1,%2,0x224\n"
"0: lhi %0,0x0\n"
"1:\n"
EX_TABLE(0b,1b)
: "+d" (rc) :"d" (0), "d" (ptr) : "memory");
return rc;
}
static int diag224_get_name_table(void)
@ -492,7 +500,10 @@ static int diag224_get_name_table(void)
diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
if (!diag224_cpu_names)
return -ENOMEM;
diag224(diag224_cpu_names);
if (diag224(diag224_cpu_names)) {
kfree(diag224_cpu_names);
return -ENOTSUPP;
}
EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
return 0;
}