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From: Greg KH <gregkh@linuxfoundation.org>
To: Fei Li <fei1.li@intel.com>
Cc: linux-kernel@vger.kernel.org, yu1.wang@intel.com, shuox.liu@gmail.com
Subject: Re: [PATCH v2 1/3] virt: acrn: Introduce interfaces for MMIO device passthrough
Date: Wed, 25 Aug 2021 22:43:29 +0200	[thread overview]
Message-ID: <YSarcddFb5wNQ+LK@kroah.com> (raw)
In-Reply-To: <20210825090142.4418-2-fei1.li@intel.com>

On Wed, Aug 25, 2021 at 05:01:40PM +0800, Fei Li wrote:
> From: Shuo Liu <shuo.a.liu@intel.com>
> 
> MMIO device passthrough enables an OS in a virtual machine to directly
> access a MMIO device in the host. It promises almost the native
> performance, which is required in performance-critical scenarios of
> ACRN.
> 
> HSM provides the following ioctls:
>   - Assign - ACRN_IOCTL_ASSIGN_MMIODEV
>     Pass data struct acrn_mmiodev from userspace to the hypervisor, and
>     inform the hypervisor to assign a MMIO device to a User VM.
> 
>   - De-assign - ACRN_IOCTL_DEASSIGN_PCIDEV
>     Pass data struct acrn_mmiodev from userspace to the hypervisor, and
>     inform the hypervisor to de-assign a MMIO device from a User VM.
> 
> Signed-off-by: Shuo Liu <shuo.a.liu@intel.com>
> Signed-off-by: Fei Li <fei1.li@intel.com>

Where is the userspace code that uses this new api?

thanks,

greg k-h

  reply	other threads:[~2021-08-25 20:43 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-25  9:01 [PATCH v2 0/3] Introduce some interfaces for ACRN hypervisor Fei Li
2021-08-25  9:01 ` [PATCH v2 1/3] virt: acrn: Introduce interfaces for MMIO device passthrough Fei Li
2021-08-25 20:43   ` Greg KH [this message]
2021-08-26  1:38     ` Li Fei1
2021-08-27  8:45       ` Greg KH
2021-08-31  6:10         ` Li Fei1
2021-08-25  9:01 ` [PATCH v2 2/3] virt: acrn: Introduce interfaces for virtual device creating/destroying Fei Li
2021-08-27  8:47   ` Greg KH
2021-08-31  6:32     ` Li Fei1
2021-08-25  9:01 ` [PATCH v2 3/3] virt: acrn: Introduce interface to fetch platform info from the hypervisor Fei Li
2021-08-27  8:49   ` Greg KH
2021-08-31  6:43     ` Li Fei1

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