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Re: [Qemu-devel] [RFC PATCH v4 0/3] Add Mediated device support[was: Add


From: Tian, Kevin
Subject: Re: [Qemu-devel] [RFC PATCH v4 0/3] Add Mediated device support[was: Add vGPU support]
Date: Wed, 25 May 2016 07:13:58 +0000

> From: Kirti Wankhede [mailto:address@hidden
> Sent: Wednesday, May 25, 2016 3:58 AM
> 
> This series adds Mediated device support to v4.6 Linux host kernel. Purpose
> of this series is to provide a common interface for mediated device
> management that can be used by different devices. This series introduces
> Mdev core module that create and manage mediated devices, VFIO based driver
> for mediated PCI devices that are created by Mdev core module and update
> VFIO type1 IOMMU module to support mediated devices.

Thanks. "Mediated device" is more generic than previous one. :-)

> 
> What's new in v4?
> - Renamed 'vgpu' module to 'mdev' module that represent generic term
>   'Mediated device'.
> - Moved mdev directory to drivers/vfio directory as this is the extension
>   of VFIO APIs for mediated devices.
> - Updated mdev driver to be flexible to register multiple types of drivers
>   to mdev_bus_type bus.
> - Updated mdev core driver with mdev_put_device() and mdev_get_device() for
>   mediated devices.
> 
> 

Just curious. In this version you move the whole mdev core under
VFIO now. Sorry if I missed any agreement on this change. IIRC Alex 
doesn't want VFIO to manage mdev life-cycle directly. Instead VFIO is 
just a mdev driver on created mediated devices....

Thanks
Kevin



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