linux-kernel - Re: [PATCH v7 7/7] KVM: x86: Allow Qemu/KVM to use PVH entry point

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Date:   Tue, 17 Apr 2018 08:41:39 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Maran Wilson <maran.wilson@...cle.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, xen-devel@...ts.xenproject.org,
        kvm@...r.kernel.org, pbonzini@...hat.com
Cc:     tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
        roger.pau@...rix.com, boris.ostrovsky@...cle.com,
        rkrcmar@...hat.com
Subject: Re: [PATCH v7 7/7] KVM: x86: Allow Qemu/KVM to use PVH entry point

On 17/04/18 01:13, 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 enables Qemu to use that same entry point for booting KVM
> guests.
> 
> Signed-off-by: Maran Wilson <maran.wilson@...cle.com>
> Suggested-by: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
> Suggested-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Tested-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>

Reviewed-by: Juergen Gross <jgross@...e.com>

You might want to send a follow-up patch to rename the functions in
arch/x86/platform/pvh/* from xen_* to pvh_*.


Juergen