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Date: Fri, 1 Dec 2023 09:33:43 +0100
From: Wenjia Zhang <>
To: Wen Gu <>,,,,,,,,,,
Subject: Re: [PATCH net-next v3 0/7] net/smc: implement SMCv2.1 virtual ISM
 device support

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]
> 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 <>

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