virtio: Allocate virtqueue in page-size units
In preparation for explicit bouncing of virtqueue pages for devices advertising the VIRTIO_F_IOMMU_PLATFORM feature, introduce a couple of wrappers around virtqueue allocation and freeing operations, ensuring that buffers are handled in terms of page-size units. Signed-off-by:Will Deacon <willdeacon@google.com> [ Paul: pick from the Android tree. Rebase to the upstream ] Signed-off-by:
Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org> Cc: Bin Meng <bmeng.cn@gmail.com> Link: https://android.googlesource.com/platform/external/u-boot/+/b4bb5227d4cf4fdfcd8b4e1ff2692d3a54d1482a Reviewed-by:
Simon Glass <sjg@chromium.org>
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