From 1a36a39e225d3558fb3776a3d3d7736cf1ec9f60 Mon Sep 17 00:00:00 2001 From: Martin Schwidefsky Date: Thu, 29 Oct 2015 10:28:26 +0100 Subject: s390/dump: rework CPU register dump code To collect the CPU registers of the crashed system allocated a single page with memblock_alloc_base and use it as a copy buffer. Replace the stop-and-store-status sigp with a store-status-at-address sigp in smp_save_dump_cpus() and smp_store_status(). In both cases the target CPU is already stopped and store-status-at-address avoids the detour via the absolute zero page. For kexec simplify s390_reset_system and call store_status() before the prefix register of the boot CPU has been set to zero. Use STPX to store the prefix register and remove dump_prefix_page. Acked-by: Michael Holzheu Signed-off-by: Martin Schwidefsky --- drivers/s390/char/zcore.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/s390/char/zcore.c') diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c index 087da775c359..bed191a39c5b 100644 --- a/drivers/s390/char/zcore.c +++ b/drivers/s390/char/zcore.c @@ -129,8 +129,6 @@ static int __init init_cpu_info(void) TRACE("could not copy from HSA\n"); return -EIO; } - if (MACHINE_HAS_VX) - save_vx_regs_safe(sa_ext->vx_regs); return 0; } -- cgit