>>> On 11.08.16 at 05:30, <visen....@huawei.com> wrote:
> According to the analysis hvmloader code, find a problem:
>
> if (is_64bar) {
> bar_data_upper = pci_readl(devfn, bar_reg + 4);
> pci_writel(devfn, bar_reg + 4, ~0);
> bar_sz_upper = pci_readl(devfn, bar_reg + 4);
> pci_writel(devfn, bar_reg + 4, bar_data_upper);
> bar_sz = (bar_sz_upper << 32) | bar_sz;
> }
> bar_sz &= ~(bar_sz - 1);
>
> read from the pci device, bar_sz_upper is 0xffffffff, if the bar size is 8G,
> the bar_sz_upper should be 0xfffffffe.
But that doesn't indicate a problem with hvmloader. Instead that
tells you that qemu isn't behaving correctly. First thing for you
to do is probably to try a newer qemu, or otherwise see whether
you can figure why qemu sends back 0xffffffff in this case
(perhaps by adding a little bit of logging to the respective code).
Jan
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