[vfio-users] Help Patching Qemu for Vendor

[Alex Williamson]

On Sun, May 8, 2016 at 2:30 PM, Spam House <kthxplzdie at gmail.com> wrote:

> Hey All,
>
> Could anyone give me a quick summary of how to apply this (
> http://www.spinics.net/lists/kvm/msg121742.html) patch to Qemu on Arch
> Linux.
>
> I've cloned the Qemu git and have tried various ways of parsing the info
> in the link into other files and using 'ed' to try and append/update the
> files with no success.
>
> Example:
> git clone qemu
> cd qemu/target-i386
> nano cpu-qom.b (insert diff changes and save add 'w' at the very end)
> ed - cpu-qom.h < cpu-qom.b
>
> ed returns ? and deletes/blanks out cpu-qom.h
>
> Complete noob any help appreciated!
>
> I do have a windows10 vm with my 980ti passthrough running successfully.
> The performance has degraded since switching from Unraid to Arch and the
> only difference I can find is HyperV related. It seems this is the last
> hurtle.
>

This has been in QEMU since the 2.5 release, if you're cloning qemu.git,
the change is already there.  Surely Arch has QEMU builds including it as
well.
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