On Mon, Aug 01, 2011 at 12:35:44PM +0300, Avi Kivity wrote:
> On 08/01/2011 11:26 AM, Michael S. Tsirkin wrote:
> >>
> >> static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
> >> uint32_t val, int len)
> >> {
> >> VirtIOPCIProxy *proxy = DO_UPCAST(VirtIOPCIProxy, pci_dev, pci_dev);
> >> + VirtIODevice *vdev = proxy->vdev;
> >>
> >> if (PCI_COMMAND == address) {
> >> if (!(val& PCI_COMMAND_MASTER)) {
> >> @@ -525,6 +503,9 @@ static void virtio_write_config(PCIDevice *pci_dev, uint32_t address,
> >> }
> >> }
> >> }
> >> + if (address == PCI_BASE_ADDRESS_0&& vdev->config_len) {
> >> + vdev->get_config(vdev, vdev->config);
> >> + }
> >>
> >> pci_default_write_config(pci_dev, address, val, len);
> >> msix_write_config(pci_dev, address, val, len);
> >
> >I'm not really sure why did we get the config on map,
> >specifically - Anthony, do you know?
> >But if we want to do that, memory space enable might
> >be a better place. Or maybe we just want a callback on
> >map.
>
>
> Just because a memory region becomes visible to the cpu is no reason
> to have a callback. From the device perspective, it can't tell that
> it happened.
BTW this is what qxl does, too, conceptually: on config writes, it peeks
at the bar to detect whether that got unmapped.
> --
> error compiling committee.c: too many arguments to function
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