Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 10 Jan 2024 17:24:02 -0500 | From | "Michael S. Tsirkin" <> | Subject | Re: [RFC V1 01/13] vhost-vdpa: count pinned memory |
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On Wed, Jan 10, 2024 at 12:40:03PM -0800, Steve Sistare wrote: > Remember the count of pinned memory for the device. > > Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Can we have iommufd support in vdpa so we do not keep extending these hacks?
> --- > drivers/vhost/vdpa.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index da7ec77cdaff..10fb95bcca1a 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -59,6 +59,7 @@ struct vhost_vdpa { > int in_batch; > struct vdpa_iova_range range; > u32 batch_asid; > + long pinned_vm; > }; > > static DEFINE_IDA(vhost_vdpa_ida); > @@ -893,6 +894,7 @@ static void vhost_vdpa_pa_unmap(struct vhost_vdpa *v, struct vhost_iotlb *iotlb, > unpin_user_page(page); > } > atomic64_sub(PFN_DOWN(map->size), &dev->mm->pinned_vm); > + v->pinned_vm -= PFN_DOWN(map->size); > vhost_vdpa_general_unmap(v, map, asid); > vhost_iotlb_map_free(iotlb, map); > } > @@ -975,9 +977,10 @@ static int vhost_vdpa_map(struct vhost_vdpa *v, struct vhost_iotlb *iotlb, > return r; > } > > - if (!vdpa->use_va) > + if (!vdpa->use_va) { > atomic64_add(PFN_DOWN(size), &dev->mm->pinned_vm); > - > + v->pinned_vm += PFN_DOWN(size); > + } > return 0; > } > > -- > 2.39.3
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