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Date:   Tue, 8 Mar 2022 22:57:18 -0800
From:   Josh Poimboeuf <jpoimboe@redhat.com>
To:     Peter Zijlstra <peterz@infradead.org>
Cc:     x86@kernel.org, joao@overdrivepizza.com, hjl.tools@gmail.com,
        andrew.cooper3@citrix.com, linux-kernel@vger.kernel.org,
        ndesaulniers@google.com, keescook@chromium.org,
        samitolvanen@google.com, mark.rutland@arm.com,
        alyssa.milburn@intel.com, mbenes@suse.cz, rostedt@goodmis.org,
        mhiramat@kernel.org, alexei.starovoitov@gmail.com
Subject: Re: [PATCH v4 00/45] x86: Kernel IBT
Message-ID: <20220309065718.e4k2el2mlqn23yh2@treble>
References: <20220308153011.021123062@infradead.org>
 <20220308200614.gyhp657bdq3rxapl@treble>
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On Tue, Mar 08, 2022 at 12:06:18PM -0800, Josh Poimboeuf wrote:
> As talked about on IRC there are still a few outstanding issues, that
> I'm fine with fixing after the merge window during the upcoming -next
> cycle:
> 
> - xen hypercall page functions need 'ret' - (I think you already fixed)
> 
> - why don't unreachables need to fill up the entire sym hole?
> 
> - get rid of the 'c_file' hack
> 
> - improve cmdline option intuitive-ness
> 
> - properly integrate the retpoline "demotion" with the new Spectre BHI
>   related patches - probably still needs more discussion - for example
>   we might instead want to disable IBT and warn

One more:

- Changing objtool should force a vmlinux re-link.

-- 
Josh