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SubjectRe: [PATCH 1/3] virt: acrn: Introduce interfaces for MMIO device passthrough
On Fri, Aug 20, 2021 at 02:03:04PM +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>
> ---
> drivers/virt/acrn/hsm.c | 25 +++++++++++++++++++++++++
> drivers/virt/acrn/hypercall.h | 26 ++++++++++++++++++++++++++
> include/uapi/linux/acrn.h | 28 ++++++++++++++++++++++++++++
> 3 files changed, 79 insertions(+)
>

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree. Please read:
https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

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