linux-kernel - Re: [PATCH v4 00/13] objtool: vmlinux.o and moinstr validation

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Date:   Wed, 25 Mar 2020 20:03:07 +0100 (CET)
From:   Miroslav Benes <mbenes@...e.cz>
To:     Peter Zijlstra <peterz@...radead.org>
cc:     tglx@...utronix.de, jpoimboe@...hat.com,
        linux-kernel@...r.kernel.org, x86@...nel.org, mhiramat@...nel.org
Subject: Re: [PATCH v4 00/13] objtool: vmlinux.o and moinstr validation

On Wed, 25 Mar 2020, Peter Zijlstra wrote:

> Hi all,
> 
> This lacks the first 17 patches of the v3 posting which are en-route to
> tip/core/objtool and should show up there somewhere later this evening.
> 
> As should be familiar by now; these patches implement the noinstr
> (no-instrument) validation in objtool as requested by Thomas, to ensure
> critical code (entry for now, idle later) run no unexpected code.
> 
> Functions are marked with: noinstr, which implies notrace, noinline and sticks
> things in the .noinstr.text section. Such functions can then use instr_begin()
> and instr_end() to allow calls to code outside of this section in sanctioned
> areas.

Reviewed-by: Miroslav Benes <mbenes@...e.cz>

M