public inbox for linux-kernel@vger.kernel.org
 help / color / mirror / Atom feed
From: Borislav Petkov <bp@alien8.de>
To: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: linux-kernel@vger.kernel.org,
	H Peter Anvin <h.peter.anvin@intel.com>,
	Ingo Molnar <mingo@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	David Airlie <airlied@linux.ie>,
	dri-devel@lists.freedesktop.org, x86@kernel.org
Subject: Re: [PATCH 3/6] x86: Add support for the clwb instruction
Date: Tue, 11 Nov 2014 20:46:21 +0100	[thread overview]
Message-ID: <20141111194621.GB12555@pd.tnic> (raw)
In-Reply-To: <1415734800.21508.0.camel@theros.lm.intel.com>

On Tue, Nov 11, 2014 at 12:40:00PM -0700, Ross Zwisler wrote:
> Yep, it's weird, I know.  :)

But sure, saving opcode space, makes sense to me.

Btw, I'd still be interested about this:

> +static inline void clwb(volatile void *__p)
> +{
> +     alternative_io_2(".byte " __stringify(NOP_DS_PREFIX) "; clflush %P0",

Any particular reason for using 0x3e as a prefix to have the insns be
the same size or is it simply because CLFLUSH can stomach it?

Thanks.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
--

  reply	other threads:[~2014-11-11 19:46 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-11-11 18:43 [PATCH 0/6] add support for new persistent memory instructions Ross Zwisler
2014-11-11 18:43 ` [PATCH 1/6] x86: Add support for the pcommit instruction Ross Zwisler
2014-11-13  3:25   ` Andy Lutomirski
2014-11-14 21:07     ` Ross Zwisler
2014-11-14 21:09       ` Andy Lutomirski
2014-11-11 18:43 ` [PATCH 2/6] x86/alternative: Add alternative_io_2 Ross Zwisler
2014-11-11 18:43 ` [PATCH 3/6] x86: Add support for the clwb instruction Ross Zwisler
2014-11-11 19:12   ` Borislav Petkov
2014-11-11 19:19     ` Borislav Petkov
2014-11-11 19:40       ` Ross Zwisler
2014-11-11 19:46         ` Borislav Petkov [this message]
2014-11-11 19:54           ` Ross Zwisler
2014-11-11 19:48     ` Ross Zwisler
2014-11-11 19:54       ` Borislav Petkov
2014-11-12 12:39   ` Borislav Petkov
2014-11-12 13:38     ` Anvin, H Peter
2014-11-12 14:12       ` Borislav Petkov
2014-11-13 17:47         ` Ross Zwisler
2014-11-11 18:43 ` [PATCH 4/6] x86: Use clwb in clflush_cache_range Ross Zwisler
2014-11-11 18:43 ` [PATCH 5/6] x86: Use clwb in drm_clflush_page Ross Zwisler
2014-11-11 18:43 ` [PATCH 6/6] x86: Use clwb in drm_clflush_virt_range Ross Zwisler
2014-11-13  3:14   ` Andy Lutomirski
2014-11-13 11:20     ` Borislav Petkov
2014-11-13 16:38       ` Andy Lutomirski
2014-11-13 17:11         ` Borislav Petkov
2014-11-13 17:33           ` Ville Syrjälä
2014-11-13 17:47             ` Borislav Petkov
2014-11-13 18:14               ` Ville Syrjälä
2014-11-13 18:43             ` Ville Syrjälä

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=20141111194621.GB12555@pd.tnic \
    --to=bp@alien8.de \
    --cc=airlied@linux.ie \
    --cc=dri-devel@lists.freedesktop.org \
    --cc=h.peter.anvin@intel.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=ross.zwisler@linux.intel.com \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox