From: Yves-Alexis Perez <corsac@debian.org>
To: Paolo Bonzini <pbonzini@redhat.com>,
Greg KH <gregkh@linuxfoundation.org>
Cc: Henrique de Moraes Holschuh <hmh@debian.org>,
Tim Chen <tim.c.chen@linux.intel.com>,
Justin Forbes <jmforbes@linuxtx.org>,
Thomas Gleixner <tglx@linutronix.de>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Dave Hansen <dave.hansen@intel.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Andi Kleen <ak@linux.intel.com>,
Arjan Van De Ven <arjan.van.de.ven@intel.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/7] IBRS patch series
Date: Fri, 05 Jan 2018 15:54:21 +0100 [thread overview]
Message-ID: <1515164061.3305.17.camel@debian.org> (raw)
In-Reply-To: <2b40f988-e773-97a5-77ca-de0908887ae2@redhat.com>
[-- Attachment #1: Type: text/plain, Size: 1053 bytes --]
On Fri, 2018-01-05 at 15:26 +0100, Paolo Bonzini wrote:
> Those from November seem way too early to include IBRS/IBPB. Maybe the
> two from December 3rd, but I wouldn't be 100% sure.
So, for my CPU with updated microcode:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 61
model name : Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
stepping : 4
microcode : 0x28
cpuid returns:
0x00000007 0x00: eax=0x00000000 ebx=0x021c27ab ecx=0x00000000
edx=0x0c000000
So bit 26/27 are set, which as I understand means IBRS is supported (but I
would appreciate any pointer to relevant documentation on this).
>
> So it would be even nicer to know how those microcode updates were tested.
At least I didn't test IBRS/IBPB here. I could do it provided I'm pointed to a
tree with all the things to test.
>
> (And by the way, the LFENCE change is for variant 1 aka CVE-2017-5753).
Ok, good to know. Is the kernel support part for LFENCE in the same thread (I
have to admit I'm a bit lost).
Regards,
--
Yves-Alexis
[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 488 bytes --]
prev parent reply other threads:[~2018-01-05 14:54 UTC|newest]
Thread overview: 114+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-04 17:56 [PATCH 0/7] IBRS patch series Tim Chen
2018-01-04 17:56 ` [PATCH 1/7] x86/feature: Detect the x86 feature to control Speculation Tim Chen
2018-01-04 19:58 ` Greg KH
2018-01-04 20:47 ` Tim Chen
2018-01-05 11:14 ` David Woodhouse
2018-01-05 15:14 ` Tom Lendacky
2018-01-05 17:07 ` Tim Chen
2018-01-05 13:09 ` Thomas Gleixner
2018-01-05 13:44 ` Andrea Arcangeli
2018-01-05 13:51 ` Thomas Gleixner
2018-01-04 17:56 ` [PATCH 2/7] x86/enter: MACROS to set/clear IBRS Tim Chen
2018-01-04 22:16 ` Peter Zijlstra
2018-01-04 22:21 ` Tim Chen
2018-01-04 22:23 ` Dave Hansen
2018-01-05 4:54 ` Andy Lutomirski
2018-01-05 5:05 ` Dave Hansen
2018-01-05 13:19 ` Thomas Gleixner
2018-01-04 17:56 ` [PATCH 3/7] x86/enter: Use IBRS on syscall and interrupts Tim Chen
2018-01-04 20:00 ` Greg KH
2018-01-04 20:26 ` Tim Chen
2018-01-04 20:45 ` Dave Hansen
2018-01-04 22:33 ` Peter Zijlstra
2018-01-04 23:12 ` Andrea Arcangeli
2018-01-05 0:08 ` Dave Hansen
2018-01-05 4:51 ` Andy Lutomirski
2018-01-05 5:11 ` Dave Hansen
2018-01-05 12:01 ` Alan Cox
2018-01-05 13:35 ` Thomas Gleixner
2018-01-04 17:56 ` [PATCH 4/7] x86/idle: Disable IBRS entering idle and enable it on wakeup Tim Chen
2018-01-04 22:47 ` Peter Zijlstra
2018-01-04 23:00 ` Andrea Arcangeli
2018-01-04 23:22 ` Tim Chen
2018-01-04 23:42 ` Andrea Arcangeli
2018-01-04 23:45 ` Thomas Gleixner
2018-01-05 0:03 ` Andrea Arcangeli
2018-01-08 8:24 ` Peter Zijlstra
2018-01-04 17:56 ` [PATCH 5/7] x86: Use IBRS for firmware update path Tim Chen
2018-01-04 18:48 ` Alan Cox
2018-01-04 20:05 ` Greg KH
2018-01-04 20:08 ` Woodhouse, David
2018-01-05 16:08 ` gregkh
2018-01-05 16:37 ` Andrea Arcangeli
2018-01-04 20:21 ` Andrew Cooper
2018-01-04 20:48 ` Andrea Arcangeli
2018-01-04 20:51 ` Yves-Alexis Perez
2018-01-04 21:13 ` Tim Chen
2018-01-04 22:51 ` Peter Zijlstra
2018-01-05 13:40 ` Thomas Gleixner
2018-01-04 17:56 ` [PATCH 6/7] x86/spec_ctrl: Add sysctl knobs to enable/disable SPEC_CTRL feature Tim Chen
2018-01-04 18:33 ` Borislav Petkov
2018-01-04 18:36 ` Dave Hansen
2018-01-04 18:52 ` Borislav Petkov
2018-01-04 18:57 ` Andrea Arcangeli
2018-01-04 18:59 ` Dave Hansen
2018-01-04 19:06 ` Borislav Petkov
2018-01-05 13:48 ` Thomas Gleixner
2018-01-04 18:38 ` Andrea Arcangeli
2018-01-04 18:54 ` Dave Hansen
2018-01-04 18:56 ` Borislav Petkov
2018-01-04 18:55 ` Borislav Petkov
2018-01-04 18:34 ` Andrea Arcangeli
2018-01-04 19:02 ` Tim Chen
2018-01-04 18:50 ` Alan Cox
2018-01-04 20:16 ` Greg KH
2018-01-04 20:58 ` Tim Chen
2018-01-04 22:54 ` Peter Zijlstra
2018-01-04 23:26 ` Tim Chen
2018-01-04 23:51 ` Andrea Arcangeli
2018-01-04 23:59 ` Borislav Petkov
2018-01-05 0:07 ` Thomas Gleixner
2018-01-05 11:16 ` David Woodhouse
2018-01-06 1:29 ` Tim Chen
2018-01-04 17:56 ` [PATCH 7/7] x86/microcode: Recheck IBRS features on microcode reload Tim Chen
2018-01-04 18:28 ` Borislav Petkov
2018-01-04 18:34 ` Andrea Arcangeli
2018-01-04 18:50 ` Borislav Petkov
2018-01-04 19:10 ` Tim Chen
2018-01-05 13:32 ` Greg KH
2018-01-05 13:37 ` Borislav Petkov
2018-01-05 13:47 ` Greg KH
2018-01-05 15:28 ` Andrea Arcangeli
2018-01-04 19:00 ` [PATCH 0/7] IBRS patch series Linus Torvalds
2018-01-04 19:19 ` David Woodhouse
2018-01-04 19:33 ` Linus Torvalds
2018-01-04 19:39 ` David Woodhouse
2018-01-04 19:40 ` Andrew Cooper
2018-01-04 19:46 ` David Woodhouse
2018-01-04 21:22 ` Van De Ven, Arjan
2018-01-05 11:32 ` Paolo Bonzini
2018-01-05 12:09 ` Paul Turner
2018-01-05 14:45 ` Van De Ven, Arjan
2018-01-05 14:43 ` Andrea Arcangeli
2018-01-05 14:52 ` Van De Ven, Arjan
2018-01-05 15:03 ` Andrea Arcangeli
2018-01-05 14:54 ` Thomas Gleixner
2018-01-05 11:52 ` Paul Turner
2018-01-05 14:28 ` David Woodhouse
2018-01-05 14:42 ` Van De Ven, Arjan
2018-01-05 15:38 ` David Woodhouse
2018-01-05 16:05 ` Andrea Arcangeli
2018-01-05 16:37 ` David Woodhouse
2018-01-05 16:42 ` Andrea Arcangeli
2018-01-05 16:44 ` Van De Ven, Arjan
2018-01-05 16:46 ` David Woodhouse
2018-01-05 5:25 ` Florian Weimer
2018-01-05 11:05 ` David Woodhouse
2018-01-04 19:05 ` Justin Forbes
2018-01-04 19:10 ` Tim Chen
2018-01-04 21:01 ` Yves-Alexis Perez
2018-01-05 13:28 ` Greg KH
2018-01-05 13:47 ` Yves-Alexis Perez
2018-01-05 14:01 ` Greg KH
2018-01-05 14:26 ` Paolo Bonzini
2018-01-05 14:54 ` Yves-Alexis Perez [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1515164061.3305.17.camel@debian.org \
--to=corsac@debian.org \
--cc=aarcange@redhat.com \
--cc=ak@linux.intel.com \
--cc=arjan.van.de.ven@intel.com \
--cc=dave.hansen@intel.com \
--cc=gregkh@linuxfoundation.org \
--cc=hmh@debian.org \
--cc=jmforbes@linuxtx.org \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=pbonzini@redhat.com \
--cc=tglx@linutronix.de \
--cc=tim.c.chen@linux.intel.com \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.