Michael S. Tsirkin e43c0b2ea5 virtio-pci: enable bus master for old guests
commit cc943c36fa
    pci: Use bus master address space for delivering MSI/MSI-X messages
breaks virtio-net for rhel6.[56] x86 guests because they don't
enable bus mastering for virtio PCI devices. For the same reason,
rhel6.[56] ppc64 guests cannot boot on a virtio-blk disk anymore.

Old guests forgot to enable bus mastering, enable it automatically on
DRIVER (guests use some devices before DRIVER_OK).

Reported-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-09-18 21:51:24 +03:00
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Read the documentation in qemu-doc.html or on http://wiki.qemu-project.org

- QEMU team
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Description
A QEMU emulator for legacy Apple devices
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