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s390/bpf: Implement BPF_MEMSX
authorIlya Leoshkevich <iii@linux.ibm.com>
Tue, 19 Sep 2023 10:09:07 +0000 (12:09 +0200)
committerAlexei Starovoitov <ast@kernel.org>
Thu, 21 Sep 2023 21:21:59 +0000 (14:21 -0700)
commit738476a079bd238a65c09c63e7437832d96b08e8
tree722e1729ffef7bbd819061c2fff88571fa93ffe1tree
parent3de55893f6482660e2f04454eb0e65a070523ba0commit | diff
s390/bpf: Implement BPF_MEMSX

Implement the cpuv4 load with sign-extension, which is encoded as
BPF_MEMSX (and, for internal uses cases only, BPF_PROBE_MEMSX).

This is the same as BPF_MEM and BPF_PROBE_MEM, but with sign
extension instead of zero extension, and s390x has the necessary
instructions: lgb, lgh and lgf.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230919101336.2223655-6-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
arch/s390/net/bpf_jit_comp.c diff | blob | history
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