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Re: [Xen-devel] Where is hypercall_page?

from [Daniel Stodden]

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To:	Jun Koi <junkoi2004@xxxxxxxxx>
Subject:	Re: [Xen-devel] Where is hypercall_page?
From:	Daniel Stodden <stodden@xxxxxxxxxx>
Date:	Mon, 07 Jul 2008 02:16:58 -0700
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On Mon, 2008-07-07 at 17:43 +0900, Jun Koi wrote:
> Hi,
> 
> I am looking to see where "hypercall_page" is declared in Linux
> kernel. However, I only found the extern prototype of it in
> arch/i386/kernel/setup-xen.c:
> 
> extern char hypercall_page[PAGE_SIZE];
> 
> So I am wondering where this "hypercall_page" variable is actually
> declared. Any pointer?

Only the space is reserved by guests. Never forget to grep assembly
files as well.

Contents are built by Xen. Usually during domain build, or when
requested by an MSR. The latter is probabily for PV drivers in HVM
domains. See the traps.c files for reference.

Best,
Daniel

-- 
Daniel Stodden
LRR     -      Lehrstuhl für Rechnertechnik und Rechnerorganisation
Institut für Informatik der TU München             D-85748 Garching
http://www.lrr.in.tum.de/~stodden         mailto:stodden@xxxxxxxxxx
PGP Fingerprint: F5A4 1575 4C56 E26A 0B33  3D80 457E 82AE B0D8 735B



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