On 05/09/2011 06:27 PM, Jan Kiszka wrote:
To avoid having to deal with legacy I/O forwarding, we started with a dual adapter setup in the hope to leave the primary guest adapter at know-to-work cirrus-vga. But already in a native setup with on-board primary + NVIDIA secondary, the NVIDIA Windows drivers refused to talk to its hardware in this constellation.
IIRC one issue with nvidia is that it uses non-BAR registers to move its PCI BAR around, which causes cpu writes to hit empty space.
One way to see if this is the problem is to trace mmio that misses both kvm internal devices and qemu devices.
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