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From: Linus Torvalds <torvalds@linux-foundation.org>
To: Ingo Molnar <mingo@kernel.org>, Kees Cook <keescook@chromium.org>
Cc: Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>, Len Brown <lenb@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [GIT PULL] x86/topology changes for v5.3
Date: Tue, 9 Jul 2019 15:00:15 -0700	[thread overview]
Message-ID: <CAHk-=wh7NChJP+WkaDd3qCz847Fq4NdQ6z6m-VFpbr3py_EknQ@mail.gmail.com> (raw)
In-Reply-To: <CAHk-=whJtbQFHNtNG7t7y6+oEKLpjj3eSQOrr3OPCVGbMaRz-A@mail.gmail.com>

On Tue, Jul 9, 2019 at 2:45 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> and I suspect it's the sensitive bit pinning. But I'll delve all the way.

Confirmed. Bisection says

873d50d58f67ef15d2777b5e7f7a5268bb1fbae2 is the first bad commit
commit 873d50d58f67ef15d2777b5e7f7a5268bb1fbae2
Author: Kees Cook <keescook@chromium.org>
Date:   Mon Jun 17 21:55:02 2019 -0700

    x86/asm: Pin sensitive CR4 bits

this is on a bog-standard Intel setup with F30, both desktop and
laptop (i9-9900k and i7-8565u respectively).

I haven't confirmed yet whether reverting just that one commit is
required, or if I need to revert the cr0 one too.

I also don't have any logs, because the boot never gets far enough. I
assume that there was a problem bringing up a non-boot CPU, and the
eventual hang ends up being due to that.

                   Linus

  reply	other threads:[~2019-07-09 22:00 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-07-08 16:27 [GIT PULL] x86/topology changes for v5.3 Ingo Molnar
2019-07-09  1:45 ` pr-tracker-bot
2019-07-09 21:20 ` Linus Torvalds
2019-07-09 21:26   ` Linus Torvalds
2019-07-09 21:45     ` Linus Torvalds
2019-07-09 22:00       ` Linus Torvalds [this message]
2019-07-09 22:07         ` Linus Torvalds
2019-07-09 22:27         ` Thomas Gleixner
2019-07-09 23:00           ` Thomas Gleixner
2019-07-09 23:17             ` Thomas Gleixner
2019-07-10  0:31               ` Kees Cook
2019-07-10 11:27                 ` Xi Ruoyao
2019-07-10 12:01                   ` Xi Ruoyao
2019-07-10 12:19                     ` Thomas Gleixner
2019-07-10 12:31                       ` Jiri Kosina
2019-07-10 13:21                         ` Peter Zijlstra
2019-07-10 13:27                           ` Jiri Kosina
2019-07-10 13:28                             ` Jiri Kosina
2019-07-10 13:31                               ` Xi Ruoyao
2019-07-10 13:25                         ` Xi Ruoyao
2019-07-10 13:44                           ` Peter Zijlstra
2019-07-10 14:03                             ` Thomas Gleixner
2019-07-10 14:26                               ` Thomas Gleixner
2019-07-10 14:22                             ` Jiri Kosina
2019-07-10 14:26                               ` Peter Zijlstra
2019-07-10 15:13                                 ` Thomas Gleixner
2019-07-10 15:58                                   ` Xi Ruoyao
2019-07-10 19:42                                     ` [PATCH] x86/asm: Move native_write_cr0/3() out of line Thomas Gleixner
2019-07-10 19:59                                       ` Kees Cook
2019-07-10 20:00                                         ` Thomas Gleixner
2019-07-10 20:02                                       ` Peter Zijlstra
2019-07-10 20:19                                       ` [tip:x86/urgent] x86/asm: Move native_write_cr0/4() " tip-bot for Thomas Gleixner
2019-07-10 14:44                               ` [GIT PULL] x86/topology changes for v5.3 Xi Ruoyao
2019-07-11  7:11                               ` Nadav Amit
2019-07-11  7:16                                 ` Thomas Gleixner
2019-07-11  8:01                                 ` Peter Zijlstra
2019-07-11 15:08                                   ` Kees Cook
2019-07-11 17:09                                     ` Nadav Amit
2019-07-10  0:59             ` Linus Torvalds
2019-07-10  1:08               ` Linus Torvalds
2019-07-10  3:21                 ` Linus Torvalds
2019-07-10  5:15                   ` Linus Torvalds
2019-07-10  5:33                     ` Kees Cook
2019-07-10 18:40                     ` Linus Torvalds
2019-07-10 10:03             ` Rafael J. Wysocki

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