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

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Date:   Wed, 25 Mar 2020 18:45:25 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     tglx@...utronix.de, jpoimboe@...hat.com
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, peterz@...radead.org,
        mhiramat@...nel.org, mbenes@...e.cz
Subject: [PATCH v4 00/13] objtool: vmlinux.o and moinstr validation

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.