From 77fa22450de00d535de2cc8be653983560828000 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Sat, 25 Jun 2005 14:55:30 -0700 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/s390/kernel/smp.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'arch/s390/kernel/smp.c') 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) -- cgit v1.2.3-70-g09d2