On Wed, 1 Feb 2023 11:04:23 +0100, Christophe Leroy wrote:
> That test was introducted in 2006 by
> commit 00ae36de49cc ("[POWERPC] Better check in show_instructions").
> At that time, there was no BPF progs.
>
> As seen in message of commit 89d21e259a94 ("powerpc/bpf/32: Fix Oops
> on tail call tests"), when a page fault occurs in test_bpf.ko for
> instance, the code is dumped as XXXXXXXXs. Allthough
> __kernel_text_address() checks is_bpf_text_address(), it seems it is
> not enough.
>
> [...]
Applied to powerpc/next.
[1/9] powerpc: Remove __kernel_text_address() in show_instructions()
https://git.kernel.org/powerpc/c/d9ab6da64fd15608c9feb20d769d8df1a32fe212
[2/9] powerpc/bpf/32: No need to zeroise r4 when not doing tail call
https://git.kernel.org/powerpc/c/6376ed8feca829039d31a208216b958f0e439d87
[3/9] powerpc/bpf/32: Only set a stack frame when necessary
https://git.kernel.org/powerpc/c/d084dcf256bc4565b4b1af9b00297ac7b51c7049
[4/9] powerpc/bpf/32: BPF prog is never called with more than one arg
https://git.kernel.org/powerpc/c/7dd0e2848764306d7a70943b97584ffdc7754708
[5/9] powerpc/bpf: Perform complete extra passes to update addresses
https://git.kernel.org/powerpc/c/85e031154c7c14edee0705532a9ffc8a2fe591d0
[6/9] powerpc/bpf: Only pad length-variable code at initial pass
https://git.kernel.org/powerpc/c/d3921cbb6cd663193cecf04f0b170a30c6d0e390
[7/9] powerpc/bpf/32: Optimise some particular const operations
https://git.kernel.org/powerpc/c/8616045fe785229b53a24b8698631826298d1500
[8/9] powerpc/bpf/32: introduce a second source register for ALU operations
https://git.kernel.org/powerpc/c/c88da29b4d2ce8d0070646b8f99729e9b355a4bf
[9/9] powerpc/bpf/32: perform three operands ALU operations
https://git.kernel.org/powerpc/c/19daf0aef84f33bde9c742ed41b4ded567b8dfbf
cheers
