Re: [Qemu-devel] [PATCH v2 2/3] intel-iommu: extend VTD emulation to allow 57-bit IOVA address width.

[Peter Xu]

On Wed, Nov 14, 2018 at 02:04:43PM +0800, Yu Zhang wrote:
> A 5-level paging capable VM may choose to use 57-bit IOVA address width.
> E.g. guest applications may prefer to use its VA as IOVA when performing
> VFIO map/unmap operations, to avoid the burden of managing the IOVA space.
> 
> This patch extends the current vIOMMU logic to cover the extended address
> width. When creating a VM with 5-level paging feature, one can choose to
> create a virtual VTD with 5-level paging capability, with configurations
> like "-device intel-iommu,x-aw-bits=57".
> 
> Signed-off-by: Yu Zhang <address@hidden>

Reviewed-by: Peter Xu <address@hidden>

-- 
Peter Xu