Messages in this thread | | | Subject | Re: [PATCH] MIPS/bpf: Enable bpf_probe_read{, str}() on MIPS again | From | Sergei Shtylyov <> | Date | Wed, 17 Mar 2021 12:59:38 +0300 |
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On 17.03.2021 10:15, Tiezhu Yang wrote:
> After commit 0ebeea8ca8a4 ("bpf: Restrict bpf_probe_read{, str}() only to > archs where they work"), bpf_probe_read{, str}() functions were not longer
No longer.
> available on MIPS, so there exists some errors when running bpf program:
Exist.
> root@linux:/home/loongson/bcc# python examples/tracing/task_switch.py > bpf: Failed to load program: Invalid argument > [...] > 11: (85) call bpf_probe_read#4 > unknown func bpf_probe_read#4 > [...] > Exception: Failed to load BPF program count_sched: Invalid argument > > So select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE in arch/mips/Kconfig, > otherwise the bpf old helper bpf_probe_read() will not be available. > > This is similar with the commit d195b1d1d1196 ("powerpc/bpf: Enable > bpf_probe_read{, str}() on powerpc again"). > > Fixes: 0ebeea8ca8a4 ("bpf: Restrict bpf_probe_read{, str}() only to archs where they work") > Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> [...]
MBR, Sergei
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