Ilya Leoshkevich
05a68e892e
s390/kernel: expand exception table logic to allow new handling options
...
This is a s390 port of commit 548acf1923
("x86/mm: Expand the
exception table logic to allow new handling options"), which is needed
for implementing BPF_PROBE_MEM on s390.
The new handler field is made 64-bit in order to allow pointing from
dynamically allocated entries to handlers in kernel text. Unlike on x86,
NULL is used instead of ex_handler_default. This is because exception
tables are used by boot/text_dma.S, and it would be a pain to preserve
ex_handler_default.
The new infrastructure is ignored in early_pgm_check_handler, since
there is no pt_regs.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com >
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com >
Signed-off-by: Heiko Carstens <hca@linux.ibm.com >
2020-07-20 10:55:50 +02:00
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