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    SubjectRE: [PATCH 4/5] vdpa: set dma mask for vDPA device
    Date
    > From: Jason Wang <jasowang@redhat.com>
    > Sent: Wednesday, 11 January 2023 8:28
    > To: mst@redhat.com; jasowang@redhat.com
    > Cc: Eli Cohen <elic@nvidia.com>; gdawar@amd.com;
    > virtualization@lists.linux-foundation.org; linux-kernel@vger.kernel.org;
    > tanuj.kamde@amd.com
    > Subject: [PATCH 4/5] vdpa: set dma mask for vDPA device
    >
    > Setting DMA mask for vDPA device in case that there are virtqueue that
    > is not backed by DMA so the vDPA device could be advertised as the DMA
    > device that is used by DMA API for software emulated virtqueues.
    >
    > Signed-off-by: Jason Wang <jasowang@redhat.com>
    Reviewed-by: Eli Cohen <elic@nvidia.com>
    Tested-by: <elic@nvidia.com>
    > ---
    > drivers/vdpa/vdpa.c | 5 +++++
    > 1 file changed, 5 insertions(+)
    >
    > diff --git a/drivers/vdpa/vdpa.c b/drivers/vdpa/vdpa.c
    > index 8ef7aa1365cc..6821b2850bbb 100644
    > --- a/drivers/vdpa/vdpa.c
    > +++ b/drivers/vdpa/vdpa.c
    > @@ -39,6 +39,11 @@ static int vdpa_dev_probe(struct device *d)
    > u32 max_num, min_num = 1;
    > int ret = 0;
    >
    > + d->dma_mask = &d->coherent_dma_mask;
    > + ret = dma_set_mask_and_coherent(d, DMA_BIT_MASK(64));
    > + if (ret)
    > + return ret;
    > +
    > max_num = ops->get_vq_num_max(vdev);
    > if (ops->get_vq_num_min)
    > min_num = ops->get_vq_num_min(vdev);
    > --
    > 2.25.1

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