Re: [PATCH net-next 0/7] net/smc: implement SMCv2.1 virtual ISM device support

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On 2023/11/24 21:11, Wenjia Zhang wrote:

On 19.11.23 14:57, Wen Gu wrote:
The fourth edition of SMCv2 adds the SMC version 2.1 feature updates for
SMC-Dv2 with virtual ISM. Virtual ISM are created and supported mainly by
OS or hypervisor software, comparable to IBM ISM which is based on platform
firmware or hardware.

With the introduction of virtual ISM, SMCv2.1 makes some updates:

- Introduce feature bitmask to indicate supplemental features.
- Reserve a range of CHIDs for virtual ISM.
- Support extended GIDs (128 bits) in CLC handshake.

So this patch set aims to implement these updates in Linux kernel. And it
acts as the first part of the new version of [1].


Wen Gu (7):
   net/smc: Rename some variable 'fce' to 'fce_v2x' for clarity
   net/smc: support SMCv2.x supplemental features negotiation
   net/smc: introduce virtual ISM device support feature
   net/smc: define a reserved CHID range for virtual ISM devices
   net/smc: compatible with 128-bits extend GID of virtual ISM device
   net/smc: disable SEID on non-s390 archs where virtual ISM may be used
   net/smc: manage system EID in SMC stack instead of ISM driver

  drivers/s390/net/ism.h     |  6 ---
  drivers/s390/net/ism_drv.c | 54 +++++++--------------------
  include/linux/ism.h        |  1 -
  include/net/smc.h          | 16 +++++---
  net/smc/af_smc.c           | 68 ++++++++++++++++++++++++++-------
  net/smc/smc.h              |  7 ++++
  net/smc/smc_clc.c          | 93 ++++++++++++++++++++++++++++++++--------------
  net/smc/smc_clc.h          | 22 +++++++----
  net/smc/smc_core.c         | 30 ++++++++++-----
  net/smc/smc_core.h         |  8 ++--
  net/smc/smc_diag.c         |  7 +++-
  net/smc/smc_ism.c          | 57 ++++++++++++++++++++--------
  net/smc/smc_ism.h          | 31 +++++++++++++++-
  net/smc/smc_pnet.c         |  4 +-
  14 files changed, 269 insertions(+), 135 deletions(-)

Hi Wen Gu,

Just FYI, the review is still on going and some tests on our plateform still need to do. I'll give you my comments as soon as the testing is done. I think it would be at the beginning of next week.


Hi Wenjian,

Thank you very much. I appreciate that you help to test them on your platform since I can only test
them with loopback-ism.

And I am going to send a new version which is rebased to the latest net-next and fix two existing
comments. If the current tests have not started yet, could you please test based on my upcoming v2 ?

Thanks and regards,
Wen Gu

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