On Thu, 30 Mar 2023 at 03:27, Ying-Chun Liu (PaulLiu) paul.liu@linaro.org wrote:
From: Will Deacon willdeacon@google.com
Devices advertising the VIRTIO_F_IOMMU_PLATFORM feature require platform-specific handling to configure their DMA transactions.
When handling virtio descriptors for such a device, use bounce buffers to ensure that the underlying buffers are always aligned to and padded to PAGE_SIZE in preparation for platform specific handling at page granularity.
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/+/1eff171e613ee67d...
drivers/virtio/virtio_ring.c | 48 +++++++++++++++++++++++++++++++++++- 1 file changed, 47 insertions(+), 1 deletion(-)
Reviewed-by: Simon Glass sjg@chromium.org