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

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Message-ID: <0ea22b5e-9bf5-37d5-0020-03ad2bd48923@intel.com>
Date:   Sun, 7 Feb 2021 14:35:54 -0800
From:   Dave Hansen <dave.hansen@...el.com>
To:     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>,
        "Yu, Yu-cheng" <yu-cheng.yu@...el.com>
Subject: Re: [GIT PULL] x86/urgent for v5.11-rc7

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?