[PATCH v4 0/1] Introduce a vringh accessor for IO memory

[Shunsuke Mie]

Vringh is a host-side implementation of virtio rings, and supports the vring
located on three kinds of memories, userspace, kernel space and a space
translated iotlb.

This patch introduces a new accessor for the vring on IO memory regions. The
accessor is used by the proposed PCIe endpoint virtio-{net[1], console[2]}
function drivers, which emulate a virtio device and access the virtio ring on
PCIe host memory mapped to the local IO memory region.

- [1] PCIe endpoint virtio-net function driver
link: https://lore.kernel.org/linux-pci/20230203100418.2981144-1-mie@xxxxxxxxxx/
- [2] PCIe endpoint virtio-console function driver
link: https://lore.kernel.org/linux-pci/20230427104428.862643-4-mie@xxxxxxxxxx/

Changes from:

v3: https://lore.kernel.org/virtualization/20230425102250.3847395-1-mie@xxxxxxxxxx/
- Remove a kconfig option that is for this support
- Add comments to exported functions
- Remove duplicated newlines

rfc v2: https://lore.kernel.org/virtualization/20230202090934.549556-8-mie@xxxxxxxxxx/
- Focus on a adding io memory APIs
- Rebase on next-20230414

rfc v1: https://lore.kernel.org/virtualization/20221227022528.609839-1-mie@xxxxxxxxxx/
- Initial patchset

Shunsuke Mie (1):
  vringh: IOMEM support

 drivers/vhost/vringh.c | 201 +++++++++++++++++++++++++++++++++++++++++
 include/linux/vringh.h |  32 +++++++
 2 files changed, 233 insertions(+)

-- 
2.25.1