From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Borislav Petkov <bp@suse.de>, Dave Hansen <dave.hansen@intel.com>,
Steven Rostedt <rostedt@goodmis.org>, x86-ml <x86@kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
Alexei Starovoitov <ast@kernel.org>
Subject: Re: [GIT PULL] x86/urgent for v5.11-rc7
Date: Sun, 7 Feb 2021 16:45:40 -0600 [thread overview]
Message-ID: <20210207224540.ercf5657pftibyaw@treble> (raw)
In-Reply-To: <CAHk-=wi5z9S7x94SKYNj6qSHBqz+OD76GW=MDzo-KN2Fzm-V4Q@mail.gmail.com>
On Sun, Feb 07, 2021 at 10:15:49AM -0800, Linus Torvalds wrote:
> On Sun, Feb 7, 2021 at 9:58 AM Borislav Petkov <bp@suse.de> 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.
>
> I think the new Ryzen 5000 series also supports CET, but I don't have
> any machines to check.
>
> Hopefully somebody ends up with hardware that supports it and a urge
> to try to make it work in kernel land too.
>
> I do suspect involved people should start thinking about how they want
> to deal with functions starting with
>
> endbr64
> call __fentry__
>
> instead of the call being at the very top of the function.
FWIW, objtool's already fine with it (otherwise we would have discovered
the need to disable fcf-protection much sooner).
--
Josh
next prev parent reply other threads:[~2021-02-07 22:47 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-07 10:40 [GIT PULL] x86/urgent for v5.11-rc7 Borislav Petkov
2021-02-07 17:49 ` Linus Torvalds
2021-02-07 17:58 ` Borislav Petkov
2021-02-07 18:15 ` Linus Torvalds
2021-02-07 18:32 ` Dave Hansen
2021-02-07 18:40 ` Linus Torvalds
2021-02-07 22:45 ` Josh Poimboeuf [this message]
2021-02-08 15:02 ` Steven Rostedt
2021-02-08 15:33 ` Josh Poimboeuf
2021-02-08 15:47 ` Peter Zijlstra
2021-02-08 16:15 ` Steven Rostedt
2021-02-09 8:32 ` Miroslav Benes
2021-02-09 14:49 ` Steven Rostedt
2021-02-09 15:16 ` Miroslav Benes
2021-02-09 16:45 ` Alexei Starovoitov
2021-02-09 16:55 ` Andy Lutomirski
2021-02-09 18:09 ` Linus Torvalds
2021-02-09 18:26 ` Andy Lutomirski
2021-02-09 18:39 ` Linus Torvalds
2021-02-07 18:19 ` Dave Hansen
2021-02-07 18:31 ` Andy Lutomirski
2021-02-08 10:33 ` Peter Zijlstra
2021-02-07 20:44 ` Alexei Starovoitov
2021-02-07 22:35 ` Dave Hansen
2021-02-08 16:11 ` Yu, Yu-cheng
2021-02-07 18:29 ` pr-tracker-bot
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