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authorMichael Holzheu <holzheu@de.ibm.com>2007-05-31 11:38:01 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-05-31 11:38:10 -0400
commitc41d4e3e688e338418311f449a4c68f6cb8eabbb (patch)
tree062f4431d9c2f3994009032eb32f3ad6877010d5 /arch/s390/hypfs
parent3f0a6766e0cc5a577805732e5adb50a585c58175 (diff)
[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>
Diffstat (limited to 'arch/s390/hypfs')
-rw-r--r--arch/s390/hypfs/hypfs_diag.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index 2782cf9da5b4..b9a1ce1f28e4 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -481,9 +481,17 @@ out:
481 481
482/* Diagnose 224 functions */ 482/* Diagnose 224 functions */
483 483
484static void diag224(void *ptr) 484static int diag224(void *ptr)
485{ 485{
486 asm volatile("diag %0,%1,0x224" : :"d" (0), "d"(ptr) : "memory"); 486 int rc = -ENOTSUPP;
487
488 asm volatile(
489 " diag %1,%2,0x224\n"
490 "0: lhi %0,0x0\n"
491 "1:\n"
492 EX_TABLE(0b,1b)
493 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
494 return rc;
487} 495}
488 496
489static int diag224_get_name_table(void) 497static int diag224_get_name_table(void)
@@ -492,7 +500,10 @@ static int diag224_get_name_table(void)
492 diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA); 500 diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);
493 if (!diag224_cpu_names) 501 if (!diag224_cpu_names)
494 return -ENOMEM; 502 return -ENOMEM;
495 diag224(diag224_cpu_names); 503 if (diag224(diag224_cpu_names)) {
504 kfree(diag224_cpu_names);
505 return -ENOTSUPP;
506 }
496 EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16); 507 EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);
497 return 0; 508 return 0;
498} 509}