[RESEND PATCH v4 0/8] bpf powerpc: Add BPF_PROBE_MEM support in powerpc JIT compiler

[David Laight]

From: Hari Bathini 
> Sent: 12 October 2021 13:31
> 
> Patch #1 & #2 are simple cleanup patches. Patch #3 refactors JIT
> compiler code with the aim to simplify adding BPF_PROBE_MEM support.
> Patch #4 introduces PPC_RAW_BRANCH() macro instead of open coding
> branch instruction. Patch #5 & #7 add BPF_PROBE_MEM support for PPC64
> & PPC32 JIT compilers respectively. Patch #6 & #8 handle bad userspace
> pointers for PPC64 & PPC32 cases respectively.

I thought that BPF was only allowed to do fairly restricted
memory accesses - so WTF does it need a BPF_PROBE_MEM instruction?

	David

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