From: "Robert Richter" <robert.richter@amd.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: "Andreas Herrmann" <andreas.herrmann3@amd.com>,
"Arjan van de Ven" <arjan@infradead.org>,
patches@x86-64.org, linux-kernel@vger.kernel.org
Subject: Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona
Date: Wed, 5 Sep 2007 12:35:25 +0200 [thread overview]
Message-ID: <20070905103525.GA10749@erda.amd.com> (raw)
In-Reply-To: <46DE80F0.4000706@zytor.com>
On 05.09.07 11:12:00, H. Peter Anvin wrote:
> >PCI Devices will not be the same on the bus since PCI read/write
> >functions will have different behavior. Without the patches you will
> >get an error when accessing ECS with CF8. We need ECS access for
> >patches that setups local interrupt vectors. This patches will be
> >released soon.
>
> You're missing the point. How will the PCI bus transactions be
> different when using MMCONFIG versus your extended CF8 version?
Misunderstood you, with this patch there will be the same behavior,
that's the intention. There might be slightly differences in ordering
rules for read/write cycles. IO config cycles are serialized while
ordering rules for MMIO config cycles may result in unexpected
behavior for PCI devices on the bus.
-Robert
--
Advanced Micro Devices, Inc.
Operating System Research Center
email: robert.richter@amd.com
next prev parent reply other threads:[~2007-09-05 10:36 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-03 8:17 [patch 0/5] (resent) x86: PCI extended config space access on AMD Barcelona CPUs Robert Richter
2007-09-03 8:17 ` [patch 1/5] x86: Add AMD64 Barcelona PMU MSR definitions Robert Richter
2007-09-03 8:17 ` [patch 2/5] x86: Add AMD64 Barcelona NB cfg " Robert Richter
2007-09-03 8:17 ` [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona Robert Richter
2007-09-03 8:31 ` Arjan van de Ven
2007-09-03 9:17 ` [patches] " Andreas Herrmann
2007-09-03 11:33 ` Arjan van de Ven
2007-09-03 15:47 ` Andreas Herrmann
2007-09-05 5:58 ` H. Peter Anvin
2007-09-05 8:44 ` Robert Richter
2007-09-05 10:12 ` H. Peter Anvin
2007-09-05 10:35 ` Robert Richter [this message]
2007-09-05 11:05 ` Arne Georg Gleditsch
2007-09-05 16:13 ` Andreas Herrmann
2007-09-05 22:42 ` Yinghai Lu
2007-09-06 8:31 ` Arne Georg Gleditsch
2007-09-06 9:48 ` H. Peter Anvin
2007-09-06 17:41 ` Jesse Barnes
2007-09-06 17:50 ` Yinghai Lu
2007-09-06 17:48 ` Jesse Barnes
2007-09-06 17:48 ` Yinghai Lu
2007-09-05 15:00 ` Andreas Herrmann
2007-09-06 10:14 ` Arjan van de Ven
2007-09-03 8:17 ` [patch 4/5] x86: Add PCI IDs for AMD Barcelona PCI devices Robert Richter
2007-09-03 8:17 ` [patch 5/5] x86: Set PCI config space size to extended for AMD Barcelona Robert Richter
2007-09-03 16:48 ` dean gaudet
2007-09-03 18:18 ` Robert Richter
2007-09-03 19:01 ` Martin Mares
[not found] <20070830174311.221133000@amd.com>
[not found] ` <20070830174311.536394000@amd.com>
2007-09-01 10:11 ` [patch 3/5] x86: Add PCI extended config space access " Andi Kleen
2007-09-03 8:32 ` [patches] " Andreas Herrmann
2007-09-03 10:15 ` Andi Kleen
2007-09-03 11:27 ` Robert Richter
2007-09-03 12:48 ` Andi Kleen
2007-09-03 14:48 ` Robert Richter
2007-09-03 15:24 ` Andi Kleen
2007-09-04 6:54 ` Yinghai Lu
2007-09-04 7:20 ` Andi Kleen
2007-09-03 11:31 ` Andreas Herrmann
2007-09-03 12:52 ` Andi Kleen
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