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Date: Fri, 08 Mar 2024 16:15:04 +0100 From: Björn Töpel <bjorn@...nel.org> To: Puranjay Mohan <puranjay12@...il.com> Cc: Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, Steven Rostedt <rostedt@...dmis.org>, Masami Hiramatsu <mhiramat@...nel.org>, Mark Rutland <mark.rutland@....com>, Sami Tolvanen <samitolvanen@...gle.com>, Guo Ren <guoren@...nel.org>, Ley Foon Tan <leyfoon.tan@...rfivetech.com>, Deepak Gupta <debug@...osinc.com>, Sia Jee Heng <jeeheng.sia@...rfivetech.com>, Björn Töpel <bjorn@...osinc.com>, Song Shuai <suagrfillet@...il.com>, Clément Léger <cleger@...osinc.com>, Al Viro <viro@...iv.linux.org.uk>, Jisheng Zhang <jszhang@...nel.org>, linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org Subject: Re: [RFC PATCH] riscv: Implement HAVE_DYNAMIC_FTRACE_WITH_CALL_OPS Puranjay Mohan <puranjay12@...il.com> writes: >> Now, I think a better approach for RISC-V would be implementing what x86 >> has (arch_ftrace_update_trampoline()), rather than CALL_OPS for RISC-V. >> >> Thoughts? > > I am going to spin some patches for implementing > arch_ftrace_update_trampoline() for > RISC-V, then we can compare the two approaches and see which is > better. But I agree > that arch_ftrace_update_trampoline() is a better approach given that > we can jump anywhere > with auipc/jalr. Yup, and the text size wont blow up. Cheers, Björn
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