linux-kernel - Re: [PATCH 1/4] pci/x86: don't assume pref memio are 64bit -v4

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Date:	Tue, 5 May 2009 11:52:48 -0700
From:	Jesse Barnes <jesse.barnes@...el.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Ivan Kokshaysky <ink@...assic.park.msu.ru>,
	Ingo Molnar <mingo@...e.hu>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-pci@...r.kernel.org, yannick.roehlly@...e.fr
Subject: Re: [PATCH 1/4] pci/x86: don't assume pref memio are 64bit -v4

On Thu, 23 Apr 2009 20:48:32 -0700
Yinghai Lu <yinghai@...nel.org> wrote:

> 
> we should not assign 64bit range to pci device that only take 32bit
> pref
> 
> try to set IORESOURCE_MEM_64 in 64bit resource of
> pci_device/pci_bridge and make the bus resource only have that bit
> set when all device under that do support 64bit pref mem then use
> that flag to allocate resource in wanted area
> 
> v2: fix b_res->flags and logic and passing result.
> v3: split iomem to iomem32, iomem64, and iomem64 will take
> IORESOURCE_MEM_64 V4: according to Ivan
>     make it support x86 only, by PCIBIOS_MAX_MEM_32
>     double check if the bridge does support pref mem64 with
> write/read UPPER32
> 
> [Impact: do assign wrong range to device that doesn't support it]

Thanks a lot Yinghai & Ivan, I applied 1 & 2 (the other 2 e820 patches
should go through Ingo), they're in my linux-next branch.

-- 
Jesse Barnes, Intel Open Source Technology Center
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