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Re: [PATCH 0/4] Implements the NetBSD Virtual Machine Monitor accelerato

From: Sergio Lopez
Subject: Re: [PATCH 0/4] Implements the NetBSD Virtual Machine Monitor accelerator
Date: Tue, 28 Jan 2020 10:10:07 +0100

On Tue, Jan 07, 2020 at 01:53:57PM +0100, Kamil Rytarowski wrote:
> Hello QEMU Community!
> Over the past year the NetBSD team has been working hard on a new user-mode 
> for our hypervisor that will be released as part of the upcoming NetBSD 9.0.
> This new API adds user-mode capabilities to create and manage virtual 
> machines,
> configure memory mappings for guest machines, and create and control execution
> of virtual processors.
> With this new API we are now able to bring our hypervisor to the QEMU
> community! The following patches implement the NetBSD Virtual Machine Monitor
> accelerator (NVMM) for QEMU on NetBSD 9.0 and newer hosts.
> When compiling QEMU for x86_64 passing the --enable-nvmm flag will compile the
> accelerator for use. At runtime using the '-accel nvmm' should see a
> significant performance improvement over emulation, much like when using 'hax'
> on NetBSD.
> The documentation for this new API is visible at https://man.netbsd.org under
> the libnvmm(3) and nvmm(4) pages.
> NVMM was designed and implemented by Maxime Villard.
> Thank you for your feedback.

Thank you for working on this, it's nice to see that QEMU will gain
HW-assisted acceleration on NetBSD 9.0. A couple things:

 - Are you and/or Maxime willing to step up as maintainers for the
   NVMM support in QEMU?

 - In the next version of the patch series, please use
   "scripts/get_maintainer.pl" to get the list of people you need to
   CC for the patch series.


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