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.
next prev parent 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
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