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authorHeiko Carstens <heiko.carstens@de.ibm.com>2005-06-25 14:55:30 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 16:24:37 -0700
commit77fa22450de00d535de2cc8be653983560828000 (patch)
tree61644edb2263c3d0db3ea9e9518c6f76a60039e0 /arch/s390/kernel/smp.c
parentf901e5d1e06b3326c100c5d0df43656311befb81 (diff)
[PATCH] s390: improved machine check handling
Improved machine check handling. Kernel is now able to receive machine checks while in kernel mode (system call, interrupt and program check handling). Also register validation is now performed. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/s390/kernel/smp.c')
-rw-r--r--arch/s390/kernel/smp.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 93c71fef99d..50c335067cf 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -773,13 +773,24 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
*(lowcore_ptr[i]) = S390_lowcore;
lowcore_ptr[i]->async_stack = stack + (ASYNC_SIZE);
-#ifdef CONFIG_CHECK_STACK
stack = __get_free_pages(GFP_KERNEL,0);
if (stack == 0ULL)
panic("smp_boot_cpus failed to allocate memory\n");
lowcore_ptr[i]->panic_stack = stack + (PAGE_SIZE);
+#ifndef __s390x__
+ if (MACHINE_HAS_IEEE) {
+ lowcore_ptr[i]->extended_save_area_addr =
+ (__u32) __get_free_pages(GFP_KERNEL,0);
+ if (lowcore_ptr[i]->extended_save_area_addr == 0)
+ panic("smp_boot_cpus failed to "
+ "allocate memory\n");
+ }
#endif
}
+#ifndef __s390x__
+ if (MACHINE_HAS_IEEE)
+ ctl_set_bit(14, 29); /* enable extended save area */
+#endif
set_prefix((u32)(unsigned long) lowcore_ptr[smp_processor_id()]);
for_each_cpu(cpu)