linux-kernel - Re: [RFC PATCH 1/5] nvme-pci: add function nvme_submit_vf_cmd to issue admin commands for VF driver.

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Date:   Tue, 6 Dec 2022 07:19:40 +0100
From:   Christoph Hellwig <hch@....de>
To:     Lei Rao <lei.rao@...el.com>
Cc:     kbusch@...nel.org, axboe@...com, kch@...dia.com, hch@....de,
        sagi@...mberg.me, alex.williamson@...hat.com, cohuck@...hat.com,
        jgg@...pe.ca, yishaih@...dia.com,
        shameerali.kolothum.thodi@...wei.com, kevin.tian@...el.com,
        mjrosato@...ux.ibm.com, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org, kvm@...r.kernel.org,
        eddie.dong@...el.com, yadong.li@...el.com, yi.l.liu@...el.com,
        Konrad.wilk@...cle.com, stephen@...eticom.com, hang.yuan@...el.com
Subject: Re: [RFC PATCH 1/5] nvme-pci: add function nvme_submit_vf_cmd to
 issue admin commands for VF driver.

On Tue, Dec 06, 2022 at 01:58:12PM +0800, Lei Rao wrote:
> The new function nvme_submit_vf_cmd() helps the host VF driver to issue
> VF admin commands. It's helpful in some cases that the host NVMe driver
> does not control VF's admin queue. For example, in the virtualization
> device pass-through case, the VF controller's admin queue is governed
> by the Guest NVMe driver. Host VF driver relies on PF device's admin
> queue to control VF devices like vendor-specific live migration commands.

WTF are you even smoking when you think this would be acceptable?