From: Tony Camuso <tcamuso@redhat.com>
To: Matthew Wilcox <matthew@wil.cx>
Cc: Greg KH <gregkh@suse.de>,
linux-kernel@vger.kernel.org, linux-pci@atrey.karlin.mff.cuni.cz
Subject: Re: [Fwd: Re: [PATCH 0/5]PCI: x86 MMCONFIG]
Date: Thu, 20 Dec 2007 13:30:16 -0500 [thread overview]
Message-ID: <476AB4B8.90307@redhat.com> (raw)
In-Reply-To: <20071220181603.GF29690@parisc-linux.org>
Matthew Wilcox wrote:
> Bad deduction. What's happening is that the write to the BAR is causing
> it to overlap the decode for mmconfig space. So the mmconfig write to
> set the BAR back never gets through.
>
> I have a different idea to fix this problem. Instead of writing
> 0xffffffff, we could look for an unused bit of space in the E820 map and
> write, say, 0xdfffffff to the low 32-bits of a BAR. Then it wouldn't
> overlap, and we could find its size using MMCONFIG.
>
The BAR claims to be a 64-bit BAR.
> Does anyone know how Windows handles these machines? Obviously, if it's
> using MMCONFIG, it'd have the same problems. Does it just use type 1
> for initial sizing? Or does it use type 1 for all accesses below 256
> bytes?
>
As far as I know, Windows has a blacklist that limits systems with these
devices to legacy PCI config access.
next prev parent reply other threads:[~2007-12-20 18:30 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-20 12:28 Tony Camuso
2007-12-20 17:22 ` Greg KH
2007-12-20 17:35 ` Matthew Wilcox
2007-12-20 18:04 ` Tony Camuso
2007-12-20 18:16 ` Matthew Wilcox
2007-12-20 18:30 ` Tony Camuso [this message]
2007-12-20 18:36 ` Matthew Wilcox
2007-12-20 18:49 ` Loic Prylli
2007-12-20 19:04 ` Tony Camuso
2007-12-20 19:08 ` Matthew Wilcox
2007-12-20 19:50 ` Ivan Kokshaysky
2007-12-20 20:17 ` Tony Camuso
2007-12-20 20:27 ` Tony Camuso
2008-01-08 3:41 ` Tony Camuso
2007-12-20 20:05 ` Loic Prylli
2007-12-20 20:15 ` Matthew Wilcox
2007-12-20 20:56 ` Loic Prylli
2007-12-20 21:00 ` Matthew Wilcox
2007-12-20 21:55 ` Loic Prylli
2007-12-20 19:37 ` Tony Camuso
2007-12-20 20:04 ` Matthew Wilcox
2007-12-20 20:15 ` Tony Camuso
2007-12-23 20:16 ` Loic Prylli
2007-12-23 20:55 ` Matthew Wilcox
2007-12-23 22:40 ` Loic Prylli
2007-12-24 8:09 ` Grant Grundler
2007-12-20 18:25 ` Tony Camuso
2007-12-20 21:57 ` Greg KH
2007-12-20 22:36 ` Tony Camuso
2007-12-20 22:40 ` Greg KH
2007-12-20 23:21 ` Tony Camuso
2007-12-21 2:07 ` Loic Prylli
2007-12-24 8:28 ` Grant Grundler
2008-01-08 3:20 ` [PATCH 0/5]PCI: x86 MMCONFIG Tony Camuso
2008-01-08 4:56 ` Greg KH
2008-01-08 13:14 ` Tony Camuso
2008-01-08 13:36 ` Greg KH
2008-01-08 13:44 ` Tony Camuso
2007-12-20 12:28 [Fwd: Re: [PATCH 0/5]PCI: x86 MMCONFIG] Tony Camuso
[not found] <fa.HvUNJ45qy60H427u0v9fNt3Gc7E@ifi.uio.no>
[not found] ` <fa.uuzqvr64HFsgxfiWwhEmE16Di6c@ifi.uio.no>
[not found] ` <fa.zhxdNN/1rfQhfJLVmdGBjvKYrCM@ifi.uio.no>
[not found] ` <fa.z1qlON6DA9ubBPFdrEcaFTMgYOY@ifi.uio.no>
[not found] ` <fa.U/SCC1Gvd3nSOpkMu5vcsSPYyPE@ifi.uio.no>
[not found] ` <fa.d8kGTkzOZH22bXRIRiakqgOPBM4@ifi.uio.no>
2007-12-21 0:44 ` Robert Hancock
2007-12-21 1:35 ` Tony Camuso
2007-12-21 1:42 ` Tony Camuso
2007-12-21 14:59 ` Bhavana Nagendra
2007-12-21 2:15 ` Robert Hancock
2007-12-21 2:44 ` Tony Camuso
2007-12-21 3:40 ` Loic Prylli
2007-12-21 4:07 ` Tony Camuso
2007-12-21 2:09 ` Tony Camuso
2007-12-21 14:11 ` Andi Kleen
[not found] ` <fa.pdOcVPk2gFn5iK76ExRH6Ow+NPw@ifi.uio.no>
2007-12-22 16:41 ` Robert Hancock
[not found] ` <fa.AlLzUeumrcT2SswgOn6MxKfDE0U@ifi.uio.no>
[not found] ` <fa.wIE0QfzMAxr82X049FecszlEnQY@ifi.uio.no>
[not found] ` <fa.2jJbe4cdXLfOVhNWVxdIjsW8GQc@ifi.uio.no>
[not found] ` <fa.JiW7yU0G/EdLOCYcPOacl/XVocc@ifi.uio.no>
[not found] ` <fa.PI93hBriZRT9ggytQ5eY/446Tno@ifi.uio.no>
2007-12-24 17:13 ` Robert Hancock
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