All of lore.kernel.org
 help / color / mirror / Atom feed
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Vladislav Buzov <vbuzov@ru.mvista.com>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: Re: [RFC/PATCH] powerpc: MPC7450 L2 HW cache flush feature	utilization
Date: Thu, 28 Jun 2007 21:09:04 +1000	[thread overview]
Message-ID: <1183028945.5521.274.camel@localhost.localdomain> (raw)
In-Reply-To: <468391B3.3080100@ru.mvista.com>

On Thu, 2007-06-28 at 14:47 +0400, Vladislav Buzov wrote:
> 
> I've looked through cache.S and see it contains a dcbf loop over 4Mb 
> along with L2, L3 HW cache flushing. The comments says 'Due to a bug 
> with the HW flush on some CPU revs, we occasionally experience data 
> corruption...'. Could you please clarify which CPU revisions have this 
> bug and whether it is the same bug described in errata and requiring a 
> complete cache locking before flushing? Do we still need to use the dcbf 
> loop in _set_L2CR() for MPC7450 processors?

Can't remember ... that code is pretty old now.

Cheers,
Ben.

  reply	other threads:[~2007-06-28 11:09 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-13 10:19 [RFC/PATCH] powerpc: MPC7450 L2 HW cache flush feature utilization Vladislav Buzov
2007-06-14 13:56 ` Segher Boessenkool
2007-06-14 17:12   ` Vladislav Buzov
2007-06-14 22:26     ` Mark A. Greer
2007-06-15  8:16       ` Segher Boessenkool
2007-06-15  8:55         ` Vladislav D. Buzov
2007-06-15  9:01           ` Segher Boessenkool
2007-06-15  9:33             ` Vladislav D. Buzov
2007-06-15 10:44               ` Segher Boessenkool
2007-06-15  8:14     ` Segher Boessenkool
2007-06-15  8:42       ` Vladislav D. Buzov
2007-06-15  8:56         ` Segher Boessenkool
2007-06-15 21:20       ` Mark A. Greer
2007-06-15 22:14         ` Segher Boessenkool
2007-06-21 12:37         ` Benjamin Herrenschmidt
2007-06-22 15:22           ` Vladislav Buzov
2007-06-23 15:46             ` Segher Boessenkool
2007-06-25 14:09               ` Vladislav Buzov
2007-06-28  8:24                 ` Segher Boessenkool
2007-06-28  9:13                   ` Benjamin Herrenschmidt
2007-06-28 10:47                     ` Vladislav Buzov
2007-06-28 11:09                       ` Benjamin Herrenschmidt [this message]
2007-06-25 19:00   ` Vladislav Buzov
2007-06-28  8:35     ` Segher Boessenkool
2007-06-29 10:41       ` Vladislav Buzov

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=1183028945.5521.274.camel@localhost.localdomain \
    --to=benh@kernel.crashing.org \
    --cc=linuxppc-dev@ozlabs.org \
    --cc=vbuzov@ru.mvista.com \
    /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.