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Subject: [PATCH v4 00/13] virtio-crypto: introduce framework and device emulation

The virtio crypto is a virtual crypto device as well as a kind
of virtual hardware accelerator for virtual machines. The
encryption and decryption requests are placed in the data
queue and handled by the real crypto accelerators finally.
The second queue is the control queue used to create or
destroy sessions for symmetric algorithms and control
some advanced features in the future. The virtio crypto
device provides the following crypto services: CIPHER,

 - add vhost-user as a high performance cryptodev backend.
 - more crypto services support.
 - mirgration support.

Changes since v3:
 - rename cryptodev-gcrypt to cryptodev-buitlin. [Daniel]
 - move cryptodev stuff from crypto/ directory to backends/ directory
   in order to keep the crypto subsystem influence by syetem
   emulators. [Daniel]
 - emulate virtio-crypto device as a legacy device by default in patch 11
 - introduce virtio-crypto qtest case in patch 12
 - add myself as cryptdoev backends mainatainer and vitio-crypto
   co-maintainer in patch 13
 - add CRT support for cryptodev-builtin, it based on my previous crypto
   patch serial queued by Daniel.
 - add queue_index for qcrypto_cryptodev_backend_sym_close_session()

Changes since v2:
 According to Daniel's comments:
 - drop cryptodev kernel module as a cryptodev backend
 - rename crypto stuff to cryptodev stuff
 - change some files' license to GPLv2+
 - remove cryptodev command line instead of QOM to define the cryptodev backend
 - rename all functions and structures in crypto sub-directory.
 - add full inline documentation for cryptodev.h
 - drop crypto-queue.c [Paolo]
 - merge some patches

Great thanks to Daniel and Paolo. Please review again, thanks!

Changes since v1:
 - rmmove mixed endian-ness handler for virtio-crypto device, just
   use little-endian. [mst]
 - add sg list support according virtio-crypto spec v10 (will be posted soon).
 - fix a memory leak in session handler.
 - add a feature page link in qemu.org (http://qemu-project.org/Features/VirtioCrypto)
 - fix some trivial problems, sush as 's/Since 2.7/Since 2.8/g' in qapi-schema.json
 - rebase the latest qemu master tree.

This patch series realize the framework and emulation of a new
virtio crypto device, which is similar with virtio net device.
 - I introduce the cryptodev backend as the client of virtio crypto device
   which can be realized by different methods, such as cryptodev-backend-gcrypt in my series,
   vhost-crypto kernel module, vhost-user etc.
 - The patch set abides by the virtio crypto speccification.
 - The virtio crypto support symmetric algorithms (including CIPHER and algorithm chainning)
   at present, except HASH, MAC and AEAD services.
 - unsupport hot plug/unplug cryptodev backend at this moment.

Firstly build QEMU with libgcrypt cryptography support. 

QEMU can then be started using the following parameters:

qemu-system-x86_64 \
    [...] \
        -object cryptodev-backend-builtin,id=cryptodev0 \
        -device virtio-crypto-pci,id=crypto0,cryptodev=cryptodev0 \

The front-end linux kernel driver (Experimental at present) is publicly accessible from:

After insmod virtio-crypto.ko, you can use cryptodev-linux test the crypto function
in the guest. For example:

linux-guest:/home/gonglei/cryptodev-linux/tests # ./cipher -
requested cipher CRYPTO_AES_CBC, got cbc(aes) with driver virtio_crypto_aes_cbc
AES Test passed
requested cipher CRYPTO_AES_CBC, got cbc(aes) with driver virtio_crypto_aes_cbc
requested cipher CRYPTO_AES_CBC, got cbc(aes) with driver virtio_crypto_aes_cbc
Test passed

QEMU code also can be accessible from:


 branch virtio-crypto

For more information, please see:

Gonglei (13):
  cryptodev: introduce cryptodev backend interface
  cryptodev: add symmetric algorithm operation stuff
  virtio-crypto: introduce virtio_crypto.h
  cryptodev: introduce a new cryptodev backend
  virtio-crypto: add virtio crypto device emulation
  virtio-crypto-pci: add virtio crypto pci support
  virtio-crypto: set capacity of algorithms supported
  virtio-crypto: add control queue handler
  virtio-crypto: add data queue processing handler
  cryptodev: introduce an unified wrapper for crypto operation
  virtio-crypto: emulate virtio crypto as a legacy device by default
  virtio-crypto-test: add qtest case for virtio-crypto
  virtio-crypto: add myself as virtio-crypto and cryptodev backends

 MAINTAINERS                                    |  14 +
 backends/Makefile.objs                         |   3 +
 backends/cryptodev-builtin.c                   | 345 ++++++++++
 backends/cryptodev.c                           | 244 +++++++
 docs/specs/pci-ids.txt                         |   2 +
 hw/virtio/Makefile.objs                        |   2 +
 hw/virtio/virtio-crypto-pci.c                  |  79 +++
 hw/virtio/virtio-crypto.c                      | 899 +++++++++++++++++++++++++
 hw/virtio/virtio-pci.h                         |  15 +
 include/hw/pci/pci.h                           |   2 +
 include/hw/virtio/virtio-crypto.h              |  99 +++
 include/standard-headers/linux/virtio_crypto.h | 508 ++++++++++++++
 include/standard-headers/linux/virtio_ids.h    |   2 +-
 include/sysemu/cryptodev.h                     | 279 ++++++++
 qemu-options.hx                                |  18 +
 tests/Makefile.include                         |   3 +
 tests/virtio-crypto-test.c                     | 412 +++++++++++
 17 files changed, 2925 insertions(+), 1 deletion(-)
 create mode 100644 backends/cryptodev-builtin.c
 create mode 100644 backends/cryptodev.c
 create mode 100644 hw/virtio/virtio-crypto-pci.c
 create mode 100644 hw/virtio/virtio-crypto.c
 create mode 100644 include/hw/virtio/virtio-crypto.h
 create mode 100644 include/standard-headers/linux/virtio_crypto.h
 create mode 100644 include/sysemu/cryptodev.h
 create mode 100644 tests/virtio-crypto-test.c


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