linux-kernel - Re: [PATCH -mm] MMCONFIG: Fix x86_64 ioremap base

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Date:	Tue, 26 Dec 2006 04:01:54 +0900
From:	OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	OGAWA Hirofumi <hogawa@...aclelinux.com>,
	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm] MMCONFIG: Fix x86_64 ioremap base_address

Arjan van de Ven <arjan@...radead.org> writes:

>> Current workaround is the following (both of linus and -mm),
>> 
>> 	if (pci_mmcfg_config_num == 1 &&
>> 		cfg->pci_segment_group_number == 0 &&
>> 		(cfg->start_bus_number | cfg->end_bus_number) == 0)
>>                 /* Assume it can access 256M range */
>> 
>> But, if the system has bus number 0 only, it's a correct table.
>> We may need to detect the broken system. blacklist?
>
> or just... not assume 256Mb but assume broken?

I see. And instead, add force enable option?
-- 
OGAWA Hirofumi <hirofumi@...l.parknet.co.jp>
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