linux-kernel - Re: [PATCH -next V17 1/7] compiler_types.h: Add __noinstr

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Date:   Fri, 24 Mar 2023 09:51:25 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Björn Töpel <bjorn@...nel.org>
Cc:     arnd@...db.de, palmer@...osinc.com, tglx@...utronix.de,
        peterz@...radead.org, luto@...nel.org, conor.dooley@...rochip.com,
        heiko@...ech.de, jszhang@...nel.org, lazyparser@...il.com,
        falcon@...ylab.org, chenhuacai@...nel.org, apatel@...tanamicro.com,
        atishp@...shpatra.org, mark.rutland@....com, ben@...adent.org.uk,
        palmer@...belt.com, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        Lai Jiangshan <laijs@...ux.alibaba.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Miguel Ojeda <ojeda@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        Björn Töpel <bjorn@...osinc.com>
Subject: Re: [PATCH -next V17 1/7] compiler_types.h: Add __noinstr_section()
 for noinstr

On Wed, Mar 22, 2023 at 10:46 PM Björn Töpel <bjorn@...nel.org> wrote:
>
> guoren@...nel.org writes:
>
> > From: Lai Jiangshan <laijs@...ux.alibaba.com>
> >
> > Using __noinstr_section() doesn't automatically disable all
> > instrumentations on the section. Inhibition for some
> > instrumentations requires extra code. I.E. KPROBES explicitly
> > avoids instrumenting on .noinstr.text.
>
> Guo, the generic entry series doesn't apply cleanly on
> riscv/for-next >6.2-rc1, and this patch is the issue.

It has been merged in palmer/for-next.

Thx for taking care.

54b3948f381c (HEAD -> for-next, palmer/for-next) Merge patch series
"riscv: Add GENERIC_ENTRY support"
45b32b946a97 riscv: entry: Consolidate general regs saving/restoring
ab9164dae273 riscv: entry: Consolidate ret_from_kernel_thread into ret_from_fork
0bf298ad2b61 riscv: entry: Remove extra level wrappers of
trace_hardirqs_{on,off}
f0bddf50586d riscv: entry: Convert to generic entry
d0db02c62879 riscv: entry: Add noinstr to prevent instrumentation inserted
8574bf8d0ddd riscv: ptrace: Remove duplicate operation

>
> Could you do a respin (potentially w/o this patch)?
>
>
> Cheers,
> Björn



-- 
Best Regards
 Guo Ren