Re: [PATCH v9 0/7] KVM: x86: Allow Qemu/KVM to use PVH entry point

Borislav Petkov
2018-12-11T13:18:38Z

On Mon, Dec 10, 2018 at 11:05:34AM -0800, Maran Wilson wrote:
> For certain applications it is desirable to rapidly boot a KVM virtual
> machine. In cases where legacy hardware and software support within the
> guest is not needed, Qemu should be able to boot directly into the
> uncompressed Linux kernel binary without the need to run firmware.
>
> There already exists an ABI to allow this for Xen PVH guests and the ABI
> is supported by Linux and FreeBSD:
>
> https://xenbits.xen.org/docs/unstable/misc/pvh.html
>
> This patch series would enable Qemu to use that same entry point for
> booting KVM guests.

How would I do that, practically?

Looking at those here:

> * Qemu and qboot RFC patches have been posted to show one example of how
> this functionality can be used. Some preliminary numbers are available
> in those cover letters showing the KVM guest boot time improvement.
> Qemu:
> http://lists.nongnu.org/archive/html/qemu-devel/2018-12/msg00957.html
> qboot:
> http://lists.nongnu.org/archive/html/qemu-devel/2018-12/msg00953.html

I might still need to do some dancing to get stuff going.

Thx.

--
Regards/Gruss,
Boris.

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