All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andi Kleen <ak@linux.intel.com>
To: speck@linutronix.de
Subject: [MODERATED] Re: [PATCH v2 1/8] MDSv2 4
Date: Wed, 12 Dec 2018 13:28:31 -0800	[thread overview]
Message-ID: <20181212212831.GH25620@tassilo.jf.intel.com> (raw)
In-Reply-To: <20181212212246.GP9077@char.us.oracle.com>

On Wed, Dec 12, 2018 at 04:22:46PM -0500, speck for Konrad Rzeszutek Wilk wrote:
> On Mon, Dec 10, 2018 at 09:53:33AM -0800, speck for Andi Kleen wrote:
> > From: Andi Kleen <ak@linux.intel.com>
> > Subject:  x86/speculation/mds: Add basic bug infrastructure for
> >  MDS
> > 
> > MDS is micro architectural data sampling, which is a side channel
> > attack on internal buffers in Intel CPUs. They all have
> > the same mitigations for single thread, so we lump them all
> > together as a single MDS issue.
> > 
> > This patch adds the basic infrastructure to detect if the current
> > CPU is affected by MDS, and if yes set the right BUG bits.
> > 
> > We also provide a command line option "mds_disable" to disable
> > any workarounds.
> 
> Would it be worth referencing a not-yet-posted Intel doc,
> or at least point to the kernel.org bugzilla where we dump all
> the CPU related issues?

Can add that later once a URL is known.

> >  						    * attack, so no Speculative Store Bypass
> >  						    * control required.
> >  						    */
> > +#define ARCH_CAP_MDS_NO			(1 << 5)   /* No Microarchitectural data sampling */
> 
> Should this say anything about RDCL?

Don't see any point. 

-Andi

  reply	other threads:[~2018-12-12 21:28 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-10 17:53 [MODERATED] [PATCH v2 0/8] MDSv2 8 Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 1/8] MDSv2 4 Andi Kleen
2018-12-11 14:14   ` [MODERATED] " Paolo Bonzini
2018-12-12 21:22   ` Konrad Rzeszutek Wilk
2018-12-12 21:28     ` Andi Kleen [this message]
2018-12-12 21:25   ` Konrad Rzeszutek Wilk
2018-12-10 17:53 ` [MODERATED] [PATCH v2 2/8] MDSv2 1 Andi Kleen
2018-12-10 22:49   ` [MODERATED] " Jiri Kosina
2018-12-11  0:03     ` Andi Kleen
2018-12-11  0:13     ` Kanth Ghatraju
2018-12-11  2:00       ` Andi Kleen
2018-12-11  5:36       ` Jiri Kosina
2018-12-11 10:03       ` Borislav Petkov
2018-12-12 21:31         ` Konrad Rzeszutek Wilk
2018-12-12 21:43           ` Andi Kleen
2018-12-12 22:17           ` Borislav Petkov
2018-12-12 22:40             ` Konrad Rzeszutek Wilk
2018-12-12 22:45               ` Borislav Petkov
2018-12-13 15:15                 ` Andrew Cooper
2018-12-13 16:52                   ` Borislav Petkov
2018-12-10 17:53 ` [MODERATED] [PATCH v2 3/8] MDSv2 5 Andi Kleen
2018-12-10 23:00   ` [MODERATED] " Linus Torvalds
2018-12-11  0:03     ` Andi Kleen
2018-12-11  0:43       ` Linus Torvalds
2018-12-11  1:33         ` Linus Torvalds
2018-12-11  2:12           ` Andi Kleen
2018-12-11  2:20           ` Linus Torvalds
2018-12-11  3:25             ` Andi Kleen
2018-12-11 17:55               ` Linus Torvalds
2018-12-11 18:10                 ` Borislav Petkov
2018-12-11 18:21                 ` Linus Torvalds
2018-12-11 18:26                   ` Borislav Petkov
2018-12-11 19:47                   ` Andi Kleen
2018-12-11 21:22                   ` Thomas Gleixner
2018-12-12 14:02               ` [MODERATED] " Paolo Bonzini
2018-12-12 17:58                 ` Andi Kleen
2018-12-12 18:47                   ` Linus Torvalds
2018-12-13 19:44                     ` Linus Torvalds
2018-12-13 20:48                       ` Andi Kleen
2018-12-13 20:56                         ` Linus Torvalds
2018-12-15  0:30                         ` Andi Kleen
2018-12-11  2:10         ` Andi Kleen
2018-12-11  0:09     ` Andrew Cooper
2018-12-10 17:53 ` [MODERATED] [PATCH v2 4/8] MDSv2 0 Andi Kleen
2018-12-12 21:45   ` [MODERATED] " Konrad Rzeszutek Wilk
2018-12-12 22:09     ` Andi Kleen
2018-12-12 22:36       ` Konrad Rzeszutek Wilk
2018-12-10 17:53 ` [MODERATED] [PATCH v2 5/8] MDSv2 7 Andi Kleen
2018-12-11  0:33   ` [MODERATED] " Andrew Cooper
2018-12-12 18:05     ` Andrew Cooper
2018-12-12 21:41   ` Konrad Rzeszutek Wilk
2018-12-12 22:12     ` Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 6/8] MDSv2 3 Andi Kleen
2018-12-11  0:37   ` [MODERATED] " Andrew Cooper
2018-12-11  0:46     ` Luck, Tony
2018-12-11  1:02       ` Andrew Cooper
2018-12-11  1:53       ` Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 7/8] MDSv2 6 Andi Kleen
2018-12-10 17:53 ` [MODERATED] [PATCH v2 8/8] MDSv2 2 Andi Kleen

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=20181212212831.GH25620@tassilo.jf.intel.com \
    --to=ak@linux.intel.com \
    --cc=speck@linutronix.de \
    /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.