linux-kernel - Re: [PATCH v7 00/17] powerpc: Core ftrace rework, support for ftrace direct and bpf trampolines

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Message-Id: <173184539742.890800.10627378696586118580.b4-ty@ellerman.id.au>
Date: Sun, 17 Nov 2024 23:09:57 +1100
From: Michael Ellerman <patch-notifications@...erman.id.au>
To: linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>, bpf@...r.kernel.org, linux-trace-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, Hari Bathini <hbathini@...ux.ibm.com>
Cc: Michael Ellerman <mpe@...erman.id.au>, "Naveen N. Rao" <naveen@...nel.org>, Mark Rutland <mark.rutland@....com>, Daniel Borkmann <daniel@...earbox.net>, Masahiro Yamada <masahiroy@...nel.org>, Nicholas Piggin <npiggin@...il.com>, Alexei Starovoitov <ast@...nel.org>, Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, Christophe Leroy <christophe.leroy@...roup.eu>, Vishal Chourasia <vishalc@...ux.ibm.com>, Mahesh J Salgaonkar <mahesh@...ux.ibm.com>
Subject: Re: [PATCH v7 00/17] powerpc: Core ftrace rework, support for ftrace direct and bpf trampolines

On Wed, 30 Oct 2024 12:38:33 +0530, Hari Bathini wrote:
> This is v7 of the series posted here:
> https://lore.kernel.org/all/20241018173632.277333-1-hbathini@linux.ibm.com/
> 
> This series reworks core ftrace support on powerpc to have the function
> profiling sequence moved out of line. This enables us to have a single
> nop at kernel function entry virtually eliminating effect of the
> function tracer when it is not enabled. The function profile sequence is
> moved out of line and is allocated at two separate places depending on a
> new config option.
> 
> [...]

Applied to powerpc/next.

[01/17] powerpc/trace: Account for -fpatchable-function-entry support by toolchain
        https://git.kernel.org/powerpc/c/0b9846529e29ba988ce88b98df633de79675fcb3
[02/17] powerpc/kprobes: Use ftrace to determine if a probe is at function entry
        https://git.kernel.org/powerpc/c/be87d713eaddf0421ccd61cc060c4c29bc36fc9b
[03/17] powerpc64/ftrace: Nop out additional 'std' instruction emitted by gcc v5.x
        https://git.kernel.org/powerpc/c/161d62c2b067c4071cb515efe16475171e1c051e
[04/17] powerpc32/ftrace: Unify 32-bit and 64-bit ftrace entry code
        https://git.kernel.org/powerpc/c/654b3fa61b817a46037197b73a7ac6d36d01df7e
[05/17] powerpc/module_64: Convert #ifdef to IS_ENABLED()
        https://git.kernel.org/powerpc/c/c12cfe9dee077763708e0a5cf3aca02a85b1e8ba
[06/17] powerpc/ftrace: Remove pointer to struct module from dyn_arch_ftrace
        https://git.kernel.org/powerpc/c/8b0dc1305ea0bbb015b560193cdd76fd4100f062
[07/17] powerpc/ftrace: Skip instruction patching if the instructions are the same
        https://git.kernel.org/powerpc/c/1d59bd2fc07f0b2e643b2a07405cf0717b93984f
[08/17] powerpc/ftrace: Move ftrace stub used for init text before _einittext
        https://git.kernel.org/powerpc/c/ed6144656bb1ea29ad83671b48a21c89e7873b8a
[09/17] powerpc64/bpf: Fold bpf_jit_emit_func_call_hlp() into bpf_jit_emit_func_call_rel()
        https://git.kernel.org/powerpc/c/9670f6d2097c4f97e15c67920dfddc664d7ee91c
[10/17] powerpc/ftrace: Add a postlink script to validate function tracer
        https://git.kernel.org/powerpc/c/782f46cbce5328da9380f166bd31cd17a04a7b10
[11/17] kbuild: Add generic hook for architectures to use before the final vmlinux link
        https://git.kernel.org/powerpc/c/1198c9c689cfdaa2d08eb508c13ff116043f07b7
[12/17] powerpc64/ftrace: Move ftrace sequence out of line
        https://git.kernel.org/powerpc/c/eec37961a56aa4f3fe1c33ffd48eec7d1bb0c009
[13/17] powerpc64/ftrace: Support .text larger than 32MB with out-of-line stubs
        https://git.kernel.org/powerpc/c/cf9bc0efcce2c324314cf7f5138c08f85ef7b5eb
[14/17] powerpc/ftrace: Add support for DYNAMIC_FTRACE_WITH_CALL_OPS
        https://git.kernel.org/powerpc/c/e717754f0bb5c5347aac82232691340955735ce1
[15/17] powerpc/ftrace: Add support for DYNAMIC_FTRACE_WITH_DIRECT_CALLS
        https://git.kernel.org/powerpc/c/a52f6043a2238d656ddd23ce0499cf4f12645faa
[16/17] samples/ftrace: Add support for ftrace direct samples on powerpc
        https://git.kernel.org/powerpc/c/71db948b9d2744e92124720f682ed2c26f0de75b
[17/17] powerpc64/bpf: Add support for bpf trampolines
        https://git.kernel.org/powerpc/c/d243b62b7bd3d5314382d3b54e4992226245e936

cheers