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Date:   Wed, 5 Aug 2020 09:43:14 -0400
From:   "Michael S. Tsirkin" <mst@redhat.com>
To:     linux-kernel@vger.kernel.org
Subject: [PATCH v3 00/38] virtio: config space endian-ness cleanup
Message-ID: <20200805134226.1106164-1-mst@redhat.com>
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Config space endian-ness is currently a mess: fields are
not tagged with the correct endian-ness so it's easy
to make mistakes like instanciating config space in
native endian-ness.

Further, LE-only devices (e.g. modern-style) add unnecessary overhead
by using generic transitional-style config space accesses.

The following patches adding sparse tagging and then using that
to correctly access config space as either transitional or LE
are my tree.
Lightly tested.

I also start with a version using gcc extensions, then switch
to _Generic. This is helpful for backports to older kernels/older
distros: _Generic patch can just be skipped there.

changes from v2:
	- convert a couple of missing devices
	- add APIs for accessing config space as LE, use that
	  in modern devices and in balloon.
	- code comments in vdpa_sim explaining use of transitional APIs


Michael S. Tsirkin (38):
  virtio_balloon: fix sparse warning
  virtio_ring: sparse warning fixup
  virtio: allow __virtioXX, __leXX in config space
  virtio_9p: correct tags for config space fields
  virtio_balloon: correct tags for config space fields
  virtio_blk: correct tags for config space fields
  virtio_console: correct tags for config space fields
  virtio_crypto: correct tags for config space fields
  virtio_fs: correct tags for config space fields
  virtio_gpu: correct tags for config space fields
  virtio_input: correct tags for config space fields
  virtio_iommu: correct tags for config space fields
  virtio_mem: correct tags for config space fields
  virtio_net: correct tags for config space fields
  virtio_pmem: correct tags for config space fields
  virtio_scsi: correct tags for config space fields
  virtio_config: disallow native type fields
  mlxbf-tmfifo: sparse tags for config access
  vdpa: make sure set_features is invoked for legacy
  vhost/vdpa: switch to new helpers
  virtio_vdpa: legacy features handling
  vdpa_sim: fix endian-ness of config space
  virtio_config: cread/write cleanup
  virtio_config: rewrite using _Generic
  virtio_config: disallow native type fields (again)
  virtio_config: LE config space accessors
  virtio_caif: correct tags for config space fields
  virtio_config: add virtio_cread_le_feature
  virtio_balloon: use LE config space accesses
  virtio_input: convert to LE accessors
  virtio_fs: convert to LE accessors
  virtio_crypto: convert to LE accessors
  virtio_pmem: convert to LE accessors
  drm/virtio: convert to LE accessors
  virtio_mem: convert to LE accessors
  virtio-iommu: convert to LE accessors
  virtio_config: drop LE option from config space
  virtio_net: use LE accessors for speed/duplex

 drivers/crypto/virtio/virtio_crypto_core.c |  46 ++---
 drivers/gpu/drm/virtio/virtgpu_kms.c       |  16 +-
 drivers/iommu/virtio-iommu.c               |  34 ++--
 drivers/net/virtio_net.c                   |   9 +-
 drivers/nvdimm/virtio_pmem.c               |   4 +-
 drivers/platform/mellanox/mlxbf-tmfifo.c   |  13 +-
 drivers/scsi/virtio_scsi.c                 |   4 +-
 drivers/vdpa/vdpa.c                        |   1 +
 drivers/vdpa/vdpa_sim/vdpa_sim.c           |  33 +++-
 drivers/vhost/vdpa.c                       |   8 +-
 drivers/virtio/virtio_balloon.c            |  28 ++--
 drivers/virtio/virtio_input.c              |  32 ++--
 drivers/virtio/virtio_mem.c                |  30 ++--
 drivers/virtio/virtio_vdpa.c               |   9 +-
 fs/fuse/virtio_fs.c                        |   4 +-
 include/linux/vdpa.h                       |  34 ++++
 include/linux/virtio_caif.h                |   6 +-
 include/linux/virtio_config.h              | 186 +++++++++++++++------
 include/linux/virtio_ring.h                |  19 +--
 include/uapi/linux/virtio_9p.h             |   4 +-
 include/uapi/linux/virtio_balloon.h        |  10 +-
 include/uapi/linux/virtio_blk.h            |  26 +--
 include/uapi/linux/virtio_console.h        |   8 +-
 include/uapi/linux/virtio_crypto.h         |  26 +--
 include/uapi/linux/virtio_fs.h             |   2 +-
 include/uapi/linux/virtio_gpu.h            |   8 +-
 include/uapi/linux/virtio_input.h          |  18 +-
 include/uapi/linux/virtio_iommu.h          |  12 +-
 include/uapi/linux/virtio_mem.h            |  14 +-
 include/uapi/linux/virtio_net.h            |   8 +-
 include/uapi/linux/virtio_pmem.h           |   4 +-
 include/uapi/linux/virtio_scsi.h           |  20 +--
 32 files changed, 405 insertions(+), 271 deletions(-)

-- 
MST