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Re: [Xen-devel] [PATCH, v2] linux-2.6.18: add privileged/unprivileged ke

To: "Ian Campbell" <Ian.Campbell@xxxxxxxxxx>, "Keir Fraser" <keir@xxxxxxx>
Subject: Re: [Xen-devel] [PATCH, v2] linux-2.6.18: add privileged/unprivileged kernel feature indication
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Thu, 21 Jul 2011 10:57:33 +0100
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>>> On 21.07.11 at 11:45, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Thu, 2011-07-21 at 10:32 +0100, Keir Fraser wrote:
>> Aren't XEN_PRIV_CAP_STR parts pointless? Any hypervisor new enough to
>> understand those features will also understand
>> XEN_ELFNOTE_SUPPORTED_FEATURE?
> 
> And didn't adding new features to that string break on existing
> hypervisors -- hence the new interface?

That's why they (should - I realize I didn't clean up the patch
before sending, but now that I'll have to resend it anyway that
doesn't matter much) get added only for a high enough
CONFIG_XEN_COMPAT.

Jan


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