linux-kernel - Re: [PATCH v4 00/17] Add VFIO mediated device support and DEV-MSI support for the idxd driver

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Message-ID: <20201030185858.GI2620339@nvidia.com>
Date:   Fri, 30 Oct 2020 15:58:58 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Dave Jiang <dave.jiang@...el.com>
CC:     <vkoul@...nel.org>, <megha.dey@...el.com>, <maz@...nel.org>,
        <bhelgaas@...gle.com>, <tglx@...utronix.de>,
        <alex.williamson@...hat.com>, <jacob.jun.pan@...el.com>,
        <ashok.raj@...el.com>, <yi.l.liu@...el.com>, <baolu.lu@...el.com>,
        <kevin.tian@...el.com>, <sanjay.k.kumar@...el.com>,
        <tony.luck@...el.com>, <jing.lin@...el.com>,
        <dan.j.williams@...el.com>, <kwankhede@...dia.com>,
        <eric.auger@...hat.com>, <parav@...lanox.com>, <rafael@...nel.org>,
        <netanelg@...lanox.com>, <shahafs@...lanox.com>,
        <yan.y.zhao@...ux.intel.com>, <pbonzini@...hat.com>,
        <samuel.ortiz@...el.com>, <mona.hossain@...el.com>,
        Megha Dey <megha.dey@...ux.intel.com>,
        <dmaengine@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-pci@...r.kernel.org>, <kvm@...r.kernel.org>
Subject: Re: [PATCH v4 00/17] Add VFIO mediated device support and DEV-MSI
 support for the idxd driver

On Fri, Oct 30, 2020 at 11:50:47AM -0700, Dave Jiang wrote:
>  .../ABI/stable/sysfs-driver-dma-idxd          |    6 +
>  Documentation/driver-api/vfio/mdev-idxd.rst   |  404 ++++++
>  MAINTAINERS                                   |    1 +
>  drivers/dma/Kconfig                           |    9 +
>  drivers/dma/idxd/Makefile                     |    2 +
>  drivers/dma/idxd/cdev.c                       |    6 +-
>  drivers/dma/idxd/device.c                     |  294 ++++-
>  drivers/dma/idxd/idxd.h                       |   67 +-
>  drivers/dma/idxd/init.c                       |   86 ++
>  drivers/dma/idxd/irq.c                        |    6 +-
>  drivers/dma/idxd/mdev.c                       | 1121 +++++++++++++++++
>  drivers/dma/idxd/mdev.h                       |  116 ++

Again, a subsytem driver belongs in the directory hierarchy of the
subsystem, not in other random places. All this mdev stuff belongs
under drivers/vfio

Jason