From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mukesh Rathor <mukesh.rathor@oracle.com>
Subject: [HYBRID]: XEN_EMULATE_PREFIX in user process
Date: Thu, 28 Jun 2012 18:00:07 -0700
Message-ID: <20120628180007.06bb3fd3@mantra.us.oracle.com>
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To: "Xen-devel@lists.xensource.com" <Xen-devel@lists.xensource.com>, "stefano.stabellini@eu.citrix.com" <stefano.stabellini@eu.citrix.com>, Ian Campbell <Ian.Campbell@citrix.com>
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Hi,

Booting latest upstream pv linux as dom0, I noticed dm_mapper, user
level process, is running with XEN_EMULATE_PREFIX cpuid. I am
wondering if the prefix is statically put there, or how its put there?

For hybrid, the hvm container traps cpuid, so we don't need to prefix
cpuid. Less code if I don't have to worry about trapping the invalid
op. There seems places where the cpuid is run without the xen prefix in
user mode.

BTW, for cpuid vmexit, if kernel mode I call pv_cpuid, if user mode, I
just return cpuid values, as that's what would happen without the HVM
container.

thanks,
Mukesh