Re: [Qemu-devel] Would virtio support 64 bit address for vring virtqueue?

[Stefan Hajnoczi]

On Wed, Aug 28, 2013 at 03:18:39AM +0000, Xie, Huawei wrote:
> I am developing virtio user space poll mode network driver. We allocate vring 
> physical memory from huge page. On VMs with less than 4GB  memory, it works 
> well.  But on VMs with like 8GB memory, huge page are all allocated from high 
> end memory.
> So would virtio support 64bit address for vring virtqueue?

The vring takes guest physical addresses and the C type is __u64 (see
/usr/include/linux/virtio_ring.h).  64-bit addresses are fine.

Stefan