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Date: Mon, 29 Sep 2008 10:37:23 +0300
From: Avi Kivity <avi@redhat.com>
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To: Gleb Natapov <gleb@redhat.com>
CC: Alok Kataria <akataria@vmware.com>, Ingo Molnar <mingo@elte.hu>,
       "H. Peter Anvin" <hpa@zytor.com>, Thomas Gleixner <tglx@linutronix.de>,
       LKML <linux-kernel@vger.kernel.org>,
       the arch/x86 maintainers <x86@kernel.org>,
       Jeremy Fitzhardinge <jeremy@goop.org>,
       Rusty Russell <rusty@rustcorp.com.au>, Zachary Amsden <zach@vmware.com>,
       Dan Hecht <dhecht@vmware.com>, Jun.Nakajima@Intel.Com
Subject: Re: Use CPUID to communicate with the hypervisor.
References: <1222472815.29886.43.camel@alok-dev1> <20080929065557.GB9952@redhat.com>
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Gleb Natapov wrote:
> Can this interface be used to pass variable sized data from a hypervisor
> to a gust? ACPI or DMI tables for instance.
>
>   

In theory it can, but it would be a bad idea.  cpuid is best used to 
communicate cpu features; ACPI and DMI are (mostly) system features.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.