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Date: Mon, 8 Feb 2016 18:13:05 +0100
From: Borislav Petkov <bp@alien8.de>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>, X86 ML <x86@kernel.org>,
        david.e.box@intel.com, Andrey Ryabinin <ryabinin.a.a@gmail.com>,
        Lv Zheng <lv.zheng@intel.com>, Jan Beulich <JBeulich@suse.com>,
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        cocci@systeme.lip6.fr, Xen Devel <xen-devel@lists.xensource.com>,
        Joerg Roedel <joro@8bytes.org>,
        "Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
        Robert Moore <robert.moore@intel.com>, Ingo Molnar <mingo@redhat.com>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Mauro Carvalho Chehab <mchehab@osg.samsung.com>,
        "Luis R. Rodriguez" <mcgrof@suse.com>,
        Rusty Russell <rusty@rustcorp.com.au>,
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        Andy Lutomirski <luto@amacapital.net>,
        "Luis R. Rodriguez" <mcgrof@kernel.org>, long.wanglong@huawei.com,
        Fengguang Wu <fengguang.wu@intel.com>
Subject: Re: [Xen-devel] [PATCH v2 3/3] paravirt: rename paravirt_enabled to
 paravirt_legacy
Message-ID: <20160208171305.GN28980@pd.tnic>
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On Mon, Feb 08, 2016 at 04:53:00PM +0000, Andrew Cooper wrote:
> As an alternative check which should be doable this early on, peeking in
> the head of hypercall_page should work.  If Linux was booted as a PV
> guest, the hypercall_page will have been constructed by the domain
> builder, and won't have 0x90's in it.

Good to know, we might need it for something. :)

Thanks.

-- 
Regards/Gruss,
    Boris.

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