s390/fpu: make kernel fpu context preemptible

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Make the kernel fpu context preemptible. Add another fpu structure to the
thread_struct, and use it to save and restore the kernel fpu context if its
task uses fpu registers when it is preempted.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

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Heiko Carstens 2024-02-03 11:45:12 +01:00

parent c038b984a9

commit 4eed43de9b

4 changed files with 36 additions and 13 deletions

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42

arch/s390/include/asm/fpu.h

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2

arch/s390/include/asm/lowcore.h

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2

arch/s390/include/asm/processor.h

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3

arch/s390/kernel/process.c

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