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s390/fpu: add static FPU save area for init_task

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Previously, the init task did not have an allocated FPU save area and
saving an FPU state was not possible.  Now if the vector extension is
always enabled, provide a static FPU save area to save FPU states of
vector instructions that can be executed quite early.

Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Hendrik Brueckner
2015-09-29 17:53:22 +02:00
committed by Martin Schwidefsky
parent b5510d9b68
commit 0ac277790e
3 changed files with 6 additions and 4 deletions
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2
arch/s390/include/asm/processor.h
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@@ -139,8 +139,10 @@ struct stack_frame {
#define ARCH_MIN_TASKALIGN 8
extern __vector128 init_task_fpu_regs[__NUM_VXRS];
#define INIT_THREAD { \
.ksp = sizeof(init_stack) + (unsigned long) &init_stack, \
.fpu.regs = (void *)&init_task_fpu_regs, \
}
/*