add haveV4ISA probe #1608
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add haveV4ISA probe #1608
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This commit introduces the haveV4ISA probe and HaveV4ISA API to check
in the running kernel if instructions of the v4 ISA are supported.
The upstream commit used as reference is 1f9a1ea821ff ("bpf: Support new sign-extension load insns").
The probes tests the new long jump given by `BPF_JMP32 | BPF_JA`.
Signed-off-by: Simone Magnani <[email protected]>
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This PR introduces the
haveV4ISAprobe andHaveV4ISAAPI to check in the running kernel if instructions of the v4 ISA are supported. The upstream commit used as reference is 1f9a1ea821ff ("bpf: Support new sign-extension load insns"). The probes tests the new long jump given byBPF_JMP32 | BPF_JA.I'm attempting to submit an identical patch to bpftool, so that
bpftool feature probewill output also ISAv4 support.