Messages in this thread | | | Date | Wed, 05 Sep 2007 11:12:00 +0100 | From | "H. Peter Anvin" <> | Subject | Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona |
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Robert Richter wrote: > On 05.09.07 06:58:58, H. Peter Anvin wrote: > >>> But at the moment there is no need for further discussion on this subject >>> because Andi refuses to add support for Barcelona CF8/CFC ECS access. >>> >> Well, they don't add any functionality, do they? As such, I would agree >> with Andi -- we only need one method which can (correctly) access the >> full configuration space, since it'll look the same on the bus anyway. > > PCI Devices will not be the same on the bus since PCI read/write > functions will have different behavior. Without the patches you will > get an error when accessing ECS with CF8. We need ECS access for > patches that setups local interrupt vectors. This patches will be > released soon.
You're missing the point. How will the PCI bus transactions be different when using MMCONFIG versus your extended CF8 version?
> Btw, this patch fixes also config space access with proc/sys fs and > lspci. I see this as an added functionality as well.
The latter implies the former. Again, how does this differ from MMCONFIG?
-hpa
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