netdev - Re: [PATCH V8 mlx5-next 10/15] vfio: Extend the device migration protocol with RUNNING

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Date:   Wed, 23 Feb 2022 10:42:48 -0700
From:   Alex Williamson <alex.williamson@...hat.com>
To:     Yishai Hadas <yishaih@...dia.com>
Cc:     <bhelgaas@...gle.com>, <jgg@...dia.com>, <saeedm@...dia.com>,
        <linux-pci@...r.kernel.org>, <kvm@...r.kernel.org>,
        <netdev@...r.kernel.org>, <kuba@...nel.org>, <leonro@...dia.com>,
        <kwankhede@...dia.com>, <mgurtovoy@...dia.com>, <maorg@...dia.com>,
        <cohuck@...hat.com>, <ashok.raj@...el.com>, <kevin.tian@...el.com>,
        <shameerali.kolothum.thodi@...wei.com>
Subject: Re: [PATCH V8 mlx5-next 10/15] vfio: Extend the device migration
 protocol with RUNNING_P2P

On Sun, 20 Feb 2022 11:57:11 +0200
Yishai Hadas <yishaih@...dia.com> wrote:
> diff --git a/include/linux/vfio.h b/include/linux/vfio.h
> index 3bbadcdbc9c8..3176cb5d4464 100644
> --- a/include/linux/vfio.h
> +++ b/include/linux/vfio.h
> @@ -33,6 +33,7 @@ struct vfio_device {
>  	struct vfio_group *group;
>  	struct vfio_device_set *dev_set;
>  	struct list_head dev_set_list;
> +	unsigned int migration_flags;

Maybe paranoia, but should we sanity test this in __vfio_register_dev()
to reinforce to driver authors that not all bit combinations are valid?
Thanks,

Alex