On 05.08.20 02:23, Stefano Stabellini wrote:
Hi Stefano
On Mon, 3 Aug 2020, Oleksandr Tyshchenko wrote:
From: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
Without "dma-coherent" property present in virtio-mmio device node,
guest assumes it is non-coherent and making non-cacheable accesses
to the vring when the DMA API is used for vring operations.
But virtio-mmio device which runs at the host size is making cacheable
accesses to vring. This all may result in a loss of coherency between
the guest and host.
With this patch we can avoid modifying guest at all, otherwise we
need to force VirtIO framework to not use DMA API for vring operations.
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshche...@epam.com>
This should also be folded in the first patch for libxl
Agree, will do
--
Regards,
Oleksandr Tyshchenko
