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List: linux-pci
Subject: Re: [PATCH 1/4] pci/x86: don't assume pref memio are 64bit -v4
From: Ivan Kokshaysky <ink () jurassic ! park ! msu ! ru>
Date: 2009-04-24 13:16:41
Message-ID: 20090424131641.GA31445 () jurassic ! park ! msu ! ru
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On Thu, Apr 23, 2009 at 08:48:32PM -0700, Yinghai Lu 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
Thanks, Yinghai.
> [Impact: do assign wrong range to device that doesn't support it]
>
> Reported-by: Yannick <yannick.roehlly@free.fr>
> Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Reviewed-by: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Ivan.
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