diff options
| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2020-06-30 20:52:03 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2020-07-20 10:55:50 +0200 |
| commit | 05a68e892e89c97df6650cd8cc55058002657cbc (patch) | |
| tree | 50da3706b76870f99a1acf549c9cbf4227388baf /arch/s390/mm | |
| parent | 88aa8939c96781089e5ace3492d818074c5c6fe9 (diff) | |
s390/kernel: expand exception table logic to allow new handling options
This is a s390 port of commit 548acf19234d ("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>
Diffstat (limited to 'arch/s390/mm')
| -rw-r--r-- | arch/s390/mm/fault.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 598828517d9d..aebf9183bedd 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -255,10 +255,8 @@ static noinline void do_no_context(struct pt_regs *regs) /* Are we prepared to handle this kernel fault? */ fixup = s390_search_extables(regs->psw.addr); - if (fixup) { - regs->psw.addr = extable_fixup(fixup); + if (fixup && ex_handle(fixup, regs)) return; - } /* * Oops. The kernel tried to access some bad page. We'll have to |