db9adcbf | 30-Mar-2022 |
Gautam Dawar <gautam.dawar@xilinx.com> |
vdpa: multiple address spaces support
This patches introduces the multiple address spaces support for vDPA device. This idea is to identify a specific address space via an dedicated identifier - ASI
vdpa: multiple address spaces support
This patches introduces the multiple address spaces support for vDPA device. This idea is to identify a specific address space via an dedicated identifier - ASID.
During vDPA device allocation, vDPA device driver needs to report the number of address spaces supported by the device then the DMA mapping ops of the vDPA device needs to be extended to support ASID.
This helps to isolate the environments for the virtqueue that will not be assigned directly. E.g in the case of virtio-net, the control virtqueue will not be assigned directly to guest.
As a start, simply claim 1 virtqueue groups and 1 address spaces for all vDPA devices. And vhost-vDPA will simply reject the device with more than 1 virtqueue groups or address spaces.
Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Gautam Dawar <gdawar@xilinx.com> Message-Id: <20220330180436.24644-7-gdawar@xilinx.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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d8945ec4 | 31-Aug-2021 |
Xie Yongji <xieyongji@bytedance.com> |
vdpa: Support transferring virtual addressing during DMA mapping
This patch introduces an attribute for vDPA device to indicate whether virtual address can be used. If vDPA device driver set it, vho
vdpa: Support transferring virtual addressing during DMA mapping
This patch introduces an attribute for vDPA device to indicate whether virtual address can be used. If vDPA device driver set it, vhost-vdpa bus driver will not pin user page and transfer userspace virtual address instead of physical address during DMA mapping. And corresponding vma->vm_file and offset will be also passed as an opaque pointer.
Suggested-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20210831103634.33-11-xieyongji@bytedance.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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526cb858 | 15-Apr-2021 |
Jason Wang <jasowang@redhat.com> |
vp_vdpa: report doorbell address
This patch reports the per vq doorbell location and size to vDPA bus. Userspace can then map the doorbell via mmap() via vhost-vDPA bus driver.
Signed-off-by: Jason
vp_vdpa: report doorbell address
This patch reports the per vq doorbell location and size to vDPA bus. Userspace can then map the doorbell via mmap() via vhost-vDPA bus driver.
Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20210415073147.19331-8-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Eli Cohen <elic@nvidia.com>
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