Xen pci passthru support for pci-e 4kB config space

Xen pci passthru support for pci-e 4kB config space

[James Regan]

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Hi:

I have successfully leased (passed through) an ati hd 6450 to a win7 hvm domU as the primary gfx (, but I don't seem to have full functionality (e.g. HDCP).  Currently, I can see the 256 Byte PCI configuration space in the DomU (say if I leased the card to a linux guest and run lspci -xxxx), but is there a way to pass the full 4KBpci-e configuration space to an hvm guest?  My theory is that win7 utilizes this full configuration space to complete the HDCP handshake.  I am running xen 4.1.1-r2 on a gentoo dom0 (kernel 3.3.8) with vt-d, vt-x enabled chipset (MSI Z-68 and Intel i7 2600S).  I have applied the ati gfx primary gpu patches.  Any thoughts?  thank you.

Jim

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Re: Xen pci passthru support for pci-e 4kB config space

[Konrad Rzeszutek Wilk]

On Sun, Jul 08, 2012 at 12:33:22PM -0700, James Regan wrote:
> Hi:
> 
> I have successfully leased (passed through) an ati hd 6450 to a win7 hvm domU as the primary gfx (, but I don't seem to have full functionality (e.g. HDCP).  Currently, I can see the 256 Byte PCI configuration space in the DomU (say if I leased the card to a linux guest and run lspci -xxxx), but is there a way to pass the full 4KBpci-e configuration space to an hvm guest?  My theory is that win7 utilizes this full configuration space to complete the HDCP handshake.  I am running xen 4.1.1-r2 on a gentoo dom0 (kernel 3.3.8) with vt-d, vt-x enabled chipset (MSI Z-68 and Intel i7 2600S).  I have applied the ati gfx primary gpu patches.  Any thoughts?  thank you.

It sounds like it would require using the upstream version of QEMU that
has PCIe subsystem. Perhaps Anthony might know more..

> 
> Jim

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