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From: Mike Travis <travis@sgi.com>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>,
	Bjorn Helgaas <bjorn.helgaas@hp.com>,
	Mike Habeck <habeck@sgi.com>, Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	x86@kernel.org, Jacob Pan <jacob.jun.pan@intel.com>,
	Tejun Heo <tj@kernel.org>, LKML <linux-kernel@vger.kernel.org>,
	Yinghai <yinghai.lu@oracle.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	Myron Stowe <myron.stowe@hp.com>
Subject: Re: [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned
Date: Fri, 14 May 2010 15:40:10 -0700	[thread overview]
Message-ID: <4BEDD14A.1030400@sgi.com> (raw)
In-Reply-To: <4BEDD03B.30106@zytor.com>



H. Peter Anvin wrote:
> On 05/14/2010 03:34 PM, Mike Travis wrote:
>> It seems that BIOS changes are much more difficult.  The real solution
>> to this problem is for Card Vendors to not request I/O Bars if they
>> won't be using them.  But that's the hardest option of all to accomplish.
>>
> 
> That is a non-option.  Any device which may have to be a boot or console
> device in a legacy system pretty much needs them.
> 
> 	-hpa

Yes, that's true.  We're somewhat fortunate in that our Legacy I/O
devices are confined to those on the first blade, and all of these
other devices are on other blades (PCI segments 1+).

But you're right, unless the card vendor supplied some kind of strapping
option, or something similar, it won't know it's in a UV system or not.

Thanks,
Mike

  reply	other threads:[~2010-05-14 22:40 UTC|newest]

Thread overview: 49+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-12 18:14 [Patch 1/1] x86 pci: Add option to not assign BAR's if not already assigned Mike Travis
2010-05-13 18:56 ` Bjorn Helgaas
2010-05-13 19:08   ` H. Peter Anvin
2010-05-13 19:12   ` Mike Travis
2010-05-13 19:13     ` Mike Travis
2010-05-13 19:54     ` Bjorn Helgaas
2010-05-13 20:27       ` Mike Habeck
2010-05-13 19:38   ` Mike Habeck
2010-05-13 20:02     ` Bjorn Helgaas
2010-05-13 20:09       ` H. Peter Anvin
2010-05-14 22:25       ` Jesse Barnes
2010-05-14 22:34         ` Mike Travis
2010-05-14 22:35           ` H. Peter Anvin
2010-05-14 22:40             ` Mike Travis [this message]
2010-05-15  2:25               ` Mike Travis
2010-05-14 22:47           ` Jesse Barnes
2010-05-14 22:59             ` Mike Travis
2010-05-14 23:06               ` Jesse Barnes
2010-05-14 23:23                 ` Mike Travis
2010-05-14 23:33                   ` Jesse Barnes
2010-05-14 23:40                     ` H. Peter Anvin
2010-05-15  0:02                       ` Jesse Barnes
2010-05-14 23:20             ` H. Peter Anvin
2010-05-14 23:28               ` Jesse Barnes
2010-05-14 23:32                 ` H. Peter Anvin
2010-05-14 23:34                   ` Jesse Barnes
2010-05-14 23:39                     ` H. Peter Anvin
2010-05-15  0:00                       ` Jesse Barnes
2010-05-15  0:14                         ` H. Peter Anvin
2010-05-13 20:36     ` Yinghai Lu
2010-05-13 20:34       ` H. Peter Anvin
2010-05-13 18:58 ` Bjorn Helgaas
2010-05-28 16:53 ` Mike Travis
2010-05-28 17:00   ` H. Peter Anvin
2010-05-28 17:10     ` Mike Travis
2010-05-28 19:28       ` Jesse Barnes
2010-05-28 20:04       ` H. Peter Anvin
2010-05-31 11:12         ` Mike Travis
2010-05-31 16:36           ` H. Peter Anvin
2010-06-01 22:49           ` Bjorn Helgaas
2010-06-02  7:31             ` H. Peter Anvin
2010-06-02 15:45               ` Bjorn Helgaas
2010-06-02 15:47                 ` H. Peter Anvin
2010-06-02 15:53                   ` Jesse Barnes
2010-06-09  0:53                     ` H. Peter Anvin
2010-06-09  1:26                       ` Jesse Barnes
2010-06-09 14:23                         ` Mike Habeck
2010-06-02 15:53             ` Mike Habeck
2010-06-02 16:40               ` Bjorn Helgaas

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