Re: [Xen-devel] [PATCH] hw/passthrough: Prevent QEMU from mapping PCI option ROM at address 0

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Malcolm Crossley writes ("[PATCH] hw/passthrough: Prevent QEMU from mapping PCI 
option ROM at address 0"):
> The PCI option ROM BAR uses the LSB to indicate if the BAR is enabled.
> The AMD graphics driver sets the address bit's of the BAR to 0 but leaves the
> LSB set to 1. Whilst this is not good practice, QEMU should be ignoring the
> non address parts of the BAR.
> 
> This patch adds masking of the non address parts of the BAR before comparing
> the address to 0.

Is this just for qemu-xen-traditional ?  Is there a corresponding
patch to qemu-upstream ?

Ian.

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