linux-kernel - Re: [GIT PULL] x86/urgent for v5.11-rc7

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Message-ID: <a1c9a34a-e39d-403c-bdc8-c161558d43a5@intel.com>
Date:   Mon, 8 Feb 2021 08:11:23 -0800
From:   "Yu, Yu-cheng" <yu-cheng.yu@...el.com>
To:     Dave Hansen <dave.hansen@...el.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     Borislav Petkov <bp@...e.de>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Steven Rostedt <rostedt@...dmis.org>, x86-ml <x86@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [GIT PULL] x86/urgent for v5.11-rc7

On 2/7/2021 2:35 PM, Dave Hansen wrote:
> On 2/7/21 12:44 PM, Alexei Starovoitov wrote:
>>>> It probably is an item on some Intel manager's to-enable list. So far,
>>>> the CET enablement concentrates only on userspace but dhansen might know
>>>> more about future plans. CCed.
>>> It's definitely on our radar to look at after CET userspace.
>> What is the desired timeline to enable CET in the kernel ?
>> I think for bpf and tracing it will be mostly straightforward to deal
>> with extra endbr64 insn in front of the fentry nop.
>> Just trying to figure when this work needs to be done.
> 
> Yu-cheng?  Any idea when you're going to start hacking on the in-kernel
> IBT bits?
> 

I have some kernel-mode enabling patches that I will soon send 
internally for comments.  My estimate is probably before the summer, I 
can send those to the mailing list.

--
Yu-cheng