linux-kernel - Re: [PATCH v4 00/45] x86: Kernel IBT

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Message-ID: <Yif8nO2xg6QnVQfD@hirez.programming.kicks-ass.net>
Date:   Wed, 9 Mar 2022 02:02:20 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     x86@...nel.org, joao@...rdrivepizza.com, hjl.tools@...il.com,
        jpoimboe@...hat.com, andrew.cooper3@...rix.com,
        linux-kernel@...r.kernel.org, ndesaulniers@...gle.com,
        keescook@...omium.org, samitolvanen@...gle.com,
        mark.rutland@....com, alyssa.milburn@...el.com, mbenes@...e.cz,
        rostedt@...dmis.org, mhiramat@...nel.org, daniel@...earbox.net,
        andrii@...nel.org, bpf@...r.kernel.org
Subject: Re: [PATCH v4 00/45] x86: Kernel IBT

On Tue, Mar 08, 2022 at 11:32:37PM +0100, Peter Zijlstra wrote:
> On Tue, Mar 08, 2022 at 11:01:04PM +0100, Peter Zijlstra wrote:
> > On Tue, Mar 08, 2022 at 12:00:52PM -0800, Alexei Starovoitov wrote:
> > > On Tue, Mar 08, 2022 at 04:30:11PM +0100, Peter Zijlstra wrote:
> > > > Hopefully last posting...
> > > > 
> > > > Since last time:
> > > > 
> > > >  - updated the ftrace_location() patch (naveen, rostedt)
> > > >  - added a few comments and clarifications (bpetkov)
> > > >  - disable jump-tables (joao)
> > > >  - verified clang-14-rc2 works
> > > >  - fixed a whole bunch of objtool unreachable insn issue
> > > >  - picked up a few more tags
> > > > 
> > > > Patches go on top of tip/master + arm64/for-next/linkage. Also available here:
> > > > 
> > > >   git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/wip.ibt
> > > 
> > > I've tried to test it.
> > 
> > I could cleanly do:
> > 
> > git checkout tip/master
> > git merge bpf-next/master
> > git merge queue/x86/wip.ibt
> > 
> > You want me to push out that result somewhere?
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/ibt
> 
> includes bpf-next/master.

I just managed to run bpf selftests with that kernel on a tigerlake
platform.  Seems to still work.