From mboxrd@z Thu Jan  1 00:00:00 1970
From: Juergen Gross <jgross@suse.com>
Subject: Re: PVHVM drivers in upstream linux kernel
Date: Tue, 02 Dec 2014 12:02:06 +0100
Message-ID: <547D9C2E.3040804@suse.com>
References: <547D88EF.4050206@suse.com> <547D9A4A.6010201@citrix.com>
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To: David Vrabel <david.vrabel@citrix.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
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On 12/02/2014 11:54 AM, David Vrabel wrote:
> On 02/12/14 09:39, Juergen Gross wrote:
>> Hi,
>>
>> looking into the upstream linux sources I realized that the PVHVM
>> drivers of XEN are only available with the pvops kernel. Is this on
>> purpose? Shouldn't the frontend drivers, xen/platform-pci.c etc. be
>> configurable without having to enable CONFIG_PARAVIRT?
>
> I suppose that would be possible but I don't think it's a useful
> configuration because you would lose PV spinlocks for example.

Having no pv spinlocks on a single vcpu HVM guest isn't so bad. Having
no pv-drivers for disks and networking is worse.


Juergen