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[Xen-devel] [DOM0 KERNELS] pciback: Fix SR-IOV VF passthrough
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [DOM0 KERNELS] pciback: Fix SR-IOV VF passthrough |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 26 Feb 2010 17:25:45 +0000 |
| Cc: | Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx> |
| Delivery-date: | Fri, 26 Feb 2010 09:26:27 -0800 |
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| Thread-index: | Acq3CLp/BU0RFTBT5UawBEpbUAMufQ== |
| Thread-topic: | [DOM0 KERNELS] pciback: Fix SR-IOV VF passthrough |
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Vendor/device and BAR fields in a VF's host-level PCI config space are dummy and must always be virtualised/emulated. Implement this in pciback by always extracting the values installed in dom0 kernel's own PCI structures, rather than interrogating the underlying PCI config space directly. AFAIK, this patch should apply to any kernel that implements pciback: That includes pv_ops, SLES, and the XS/XCP kernels. It should be applied to all of them. It is already applied to linux-2.6.18-xen.hg as 998:693c40564c8d. Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
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