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From: Mukesh Rathor <mukesh.rathor@oracle.com>
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>
Subject: [HYBRID]: XEN_EMULATE_PREFIX in user process
Date: Thu, 28 Jun 2012 18:00:07 -0700	[thread overview]
Message-ID: <20120628180007.06bb3fd3@mantra.us.oracle.com> (raw)

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

             reply	other threads:[~2012-06-29  1:00 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-06-29  1:00 Mukesh Rathor [this message]
2012-06-29  1:09 ` [HYBRID]: XEN_EMULATE_PREFIX in user process Konrad Rzeszutek Wilk
2012-06-29  1:26   ` Mukesh Rathor
2012-06-29  8:09     ` Ian Campbell
2012-06-29 18:15       ` Mukesh Rathor
2012-06-29 19:07         ` Mukesh Rathor
2012-06-29 22:04           ` Ian Campbell
2012-06-29 22:50             ` Mukesh Rathor
2012-07-02  8:27               ` Jan Beulich
2012-07-02  9:29                 ` Ian Campbell
2012-07-02 18:18                 ` Mukesh Rathor
2012-06-29  7:56 ` Jan Beulich
2012-06-29  8:07   ` Ian Campbell
2012-06-29  8:15     ` Jan Beulich
2012-06-29 21:18   ` Mukesh Rathor

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