Re: Re: [PATCH v3 0/4] Introduce akcipher service for virtio-crypto

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On 3/3/22 4:40 AM, Eric Biggers wrote:
On Wed, Mar 02, 2022 at 11:39:13AM +0800, zhenwei pi wrote:
v2 -> v3:
   Rename virtio_crypto_algs.c to virtio_crypto_skcipher_algs.c, and
     minor changes of function name.
   Minor changes in virtio_crypto_akcipher_algs.c: no need to copy from
     buffer if opcode is verify.

v1 -> v2:
   Fix 1 compiling warning reported by kernel test robot <lkp@xxxxxxxxx>
   Put "__le32 akcipher_algo;" instead of "__le32 reserve;" field of
     struct virtio_crypto_config directly without size change.
   Add padding in struct virtio_crypto_ecdsa_session_para to keep
     64-bit alignment.
   Remove irrelevant change by code format alignment.

   Also CC crypto gurus Herbert and linux-crypto@xxxxxxxxxxxxxxx.

   Test with QEMU(patched by the v2 version), works fine.

v1:
   Introduce akcipher service, implement RSA algorithm, and a minor fix.

zhenwei pi (4):
   virtio_crypto: Introduce VIRTIO_CRYPTO_NOSPC
   virtio-crypto: introduce akcipher service
   virtio-crypto: implement RSA algorithm
   virtio-crypto: rename skcipher algs

  drivers/crypto/virtio/Makefile                |   3 +-
  .../virtio/virtio_crypto_akcipher_algs.c      | 585 ++++++++++++++++++
  drivers/crypto/virtio/virtio_crypto_common.h  |   7 +-
  drivers/crypto/virtio/virtio_crypto_core.c    |   6 +-
  drivers/crypto/virtio/virtio_crypto_mgr.c     |  15 +-
  ...o_algs.c => virtio_crypto_skcipher_algs.c} |   4 +-
  include/uapi/linux/virtio_crypto.h            |  82 ++-
  7 files changed, 693 insertions(+), 9 deletions(-)
  create mode 100644 drivers/crypto/virtio/virtio_crypto_akcipher_algs.c
  rename drivers/crypto/virtio/{virtio_crypto_algs.c => virtio_crypto_skcipher_algs.c} (99%)

Why is this patchset useful?  That isn't explained anywhere.

- Eric

Sorry about this missing part.

This feature provides akcipher service offloading capability for guest side. And I also sent a patchset of QEMU:
https://patchwork.kernel.org/project/qemu-devel/cover/20220211084335.1254281-1-pizhenwei@xxxxxxxxxxxxx/

The two patchsets work together, guest side sends encrypt/decrypt/sign/verify requests to host side, host side handles request and return response to the guest.

--
zhenwei pi
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