diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-29 10:28:26 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-11-27 09:24:14 +0100 |
| commit | 1a36a39e225d3558fb3776a3d3d7736cf1ec9f60 (patch) | |
| tree | 63a1c8892ff95dac939beb6e7a13456fcec20cb7 /arch/s390/include/asm/fpu | |
| parent | f08b8414632c9f256e33f0a18104d8d5e103d204 (diff) | |
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 <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/fpu')
| -rw-r--r-- | arch/s390/include/asm/fpu/internal.h | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/arch/s390/include/asm/fpu/internal.h b/arch/s390/include/asm/fpu/internal.h index 2559b16da525..ea91ddfe54eb 100644 --- a/arch/s390/include/asm/fpu/internal.h +++ b/arch/s390/include/asm/fpu/internal.h @@ -12,21 +12,13 @@ #include <asm/ctl_reg.h> #include <asm/fpu/types.h> -static inline void save_vx_regs_safe(__vector128 *vxrs) +static inline void save_vx_regs(__vector128 *vxrs) { - unsigned long cr0, flags; - - flags = arch_local_irq_save(); - __ctl_store(cr0, 0, 0); - __ctl_set_bit(0, 17); - __ctl_set_bit(0, 18); asm volatile( " la 1,%0\n" " .word 0xe70f,0x1000,0x003e\n" /* vstm 0,15,0(1) */ " .word 0xe70f,0x1100,0x0c3e\n" /* vstm 16,31,256(1) */ : "=Q" (*(struct vx_array *) vxrs) : : "1"); - __ctl_load(cr0, 0, 0); - arch_local_irq_restore(flags); } static inline void convert_vx_to_fp(freg_t *fprs, __vector128 *vxrs) |