linux-kernel - RE: [RFC PATCH v3 6/7] vfio/cdx: add support for CDX bus

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Date:   Tue, 6 Sep 2022 17:23:39 +0000
From:   "Gupta, Nipun" <Nipun.Gupta@....com>
To:     Jason Gunthorpe <jgg@...dia.com>
CC:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
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        "git (AMD-Xilinx)" <git@....com>
Subject: RE: [RFC PATCH v3 6/7] vfio/cdx: add support for CDX bus

[AMD Official Use Only - General]



> -----Original Message-----
> From: Jason Gunthorpe <jgg@...dia.com>
> Sent: Tuesday, September 6, 2022 10:51 PM
> To: Gupta, Nipun <Nipun.Gupta@....com>
> Cc: robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org;
> gregkh@...uxfoundation.org; rafael@...nel.org; eric.auger@...hat.com;
> alex.williamson@...hat.com; cohuck@...hat.com; Gupta, Puneet (DCG-ENG)
> <puneet.gupta@....com>; song.bao.hua@...ilicon.com;
> mchehab+huawei@...nel.org; maz@...nel.org; f.fainelli@...il.com;
> jeffrey.l.hugo@...il.com; saravanak@...gle.com; Michael.Srba@...nam.cz;
> mani@...nel.org; yishaih@...dia.com; robin.murphy@....com;
> will@...nel.org; joro@...tes.org; masahiroy@...nel.org;
> ndesaulniers@...gle.com; linux-arm-kernel@...ts.infradead.org; linux-
> kbuild@...r.kernel.org; linux-kernel@...r.kernel.org;
> devicetree@...r.kernel.org; kvm@...r.kernel.org; okaya@...nel.org; Anand,
> Harpreet <harpreet.anand@....com>; Agarwal, Nikhil
> <nikhil.agarwal@....com>; Simek, Michal <michal.simek@....com>;
> Radovanovic, Aleksandar <aleksandar.radovanovic@....com>; git (AMD-Xilinx)
> <git@....com>
> Subject: Re: [RFC PATCH v3 6/7] vfio/cdx: add support for CDX bus
> 
> [CAUTION: External Email]
> 
> On Tue, Sep 06, 2022 at 07:18:00PM +0530, Nipun Gupta wrote:
> > vfio-cdx driver enables IOCTLs for user space to query
> > MMIO regions for CDX devices and mmap them. This change
> > also adds support for reset of CDX devices.
> >
> > This change adds the VFIO CDX driver and enables the following
> > ioctls for CDX devices:
> >  - VFIO_DEVICE_GET_INFO:
> >  - VFIO_DEVICE_GET_REGION_INFO
> >  - VFIO_DEVICE_RESET
> 
> For non-RFC posting please post VFIO separately after getting the base
> bus merged.

Agree, with non-RFC changes we will get bus merged first and then
have the vfio patches as a separate set.

Thanks,
Nipun

> 
> I think you will need to get some work done to consolidate some of
> this duplicated code that was cut & pasted here..
> 
> Jason