Re: [PATCH net-next v3 0/7] net/smc: implement SMCv2.1 virtual ISM device support

From: Wenjia Zhang
Date: Fri Dec 01 2023 - 03:34:01 EST




On 30.11.23 12:28, 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 SMC-D virtual ISM extension & loopback-ism [1].

[1] https://lore.kernel.org/netdev/1695568613-125057-1-git-send-email-guwen@xxxxxxxxxxxxxxxxx/

v3->v2:
- Rename smc_clc_fill_fce as smc_clc_fill_fce_v2x;
- Remove ISM_IDENT_MASK from drivers/s390/net/ism.h;
- Add explicitly assigning 'false' to ism_v2_capable in ism_dev_init();
- Remove smc_ism_set_v2_capable() helper for now, and introduce it in
later loopback-ism implementation;

v2->v1:
- Fix sparse complaint;
- Rebase to the latest net-next;

Hi Wen Gu,

LGTM, Thank you!

Reviewed-and-tested-by: Wenjia Zhang <wenjia@xxxxxxxxxxxxx>