On 9/20/23 15:01, Maxime Coquelin wrote:
With Virtio-user, the Virtio descriptor buffer address is the
virtual address of the mbuf's buffer. On 32 bits builds, it is
expected to be 32 bits.
With Virtio-PCI, the Virtio descriptor buffer address is the
physical address of the mbuf's buffer. On 32 bits builds running
on 64 bits kernel, it is expected to be up to 64 bits.
This patch introduces a new mask field in virtqueue's struct to
filter our the upper 4 bytes of the address only when necessary.
An optimization is introduced for 64 bits builds to remove the
masking, as the address is always 64 bits wide.
Fixes: ba55c94a7ebc ("net/virtio: revert forcing IOVA as VA mode for
virtio-user")
Cc: sta...@dpdk.org
Reported-by: Sampath Peechu <spee...@cisco.com>
Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
---
drivers/net/virtio/virtqueue.c | 2 ++
drivers/net/virtio/virtqueue.h | 18 ++++++++++++++----
2 files changed, 16 insertions(+), 4 deletions(-)
Applied to nex-virtio/for-next-net.
Thanks,
Maxime
