Re: [PATCH] pci: add pci_request_acs

[Jesse Barnes]

On Fri, 4 Dec 2009 12:15:21 -0800
Chris Wright <chrisw@xxxxxxxxxxxx> wrote:

> Commit ae21ee65e8bc228416bbcc8a1da01c56a847a60c "PCI: acs p2p upsteram
> forwarding enabling" doesn't actually enable ACS.
> 
> Add a function to pci core to allow an IOMMU to request that ACS
> be enabled.  The existing mechanism of using iommu_found() in the pci
> core to know when ACS should be enabled doesn't actually work due to
> initialization order;  iommu has only been detected not initialized.
> 
> Have Intel and AMD IOMMUs request ACS, and Xen does as well during
> early init of dom0.
> 
> Cc: Allen Kay <allen.m.kay@xxxxxxxxx>
> Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
> Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
> Cc: Joerg Roedel <joerg.roedel@xxxxxxx>
> Signed-off-by: Chris Wright <chrisw@xxxxxxxxxxxx>

Applied this one, thanks.

-- 
Jesse Barnes, Intel Open Source Technology Center
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