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Date:   Tue, 11 Dec 2018 14:18:25 +0100
From:   Borislav Petkov <bp@alien8.de>
To:     Maran Wilson <maran.wilson@oracle.com>
Cc:     x86@kernel.org, xen-devel@lists.xenproject.org,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        pbonzini@redhat.com, jgross@suse.com, boris.ostrovsky@oracle.com,
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        kirill.shutemov@linux.intel.com, luto@kernel.org,
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        tglx@linutronix.de, thomas.lendacky@amd.com, hch@infradead.org,
        roger.pau@citrix.com, rkrcmar@redhat.com
Subject: Re: [PATCH v9 0/7] KVM: x86: Allow Qemu/KVM to use PVH entry point
Message-ID: <20181211131825.GD27375@zn.tnic>
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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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