From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dario Faggioli <dario.faggioli@citrix.com>
Subject: Re: Pausing / unpausing a single domain VCPU via libxc
Date: Thu, 26 Jan 2017 16:14:18 +0100
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To: Razvan Cojocaru <rcojocaru@bitdefender.com>, xen-devel@lists.xenproject.org
Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <Ian.Jackson@eu.citrix.com>, Wei Liu <wei.liu@citrix.com>
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[Adding tools people, and Andrew's which, according to git history,
=C2=A0has touched the involved (Xen) code for last :-) ]

On Thu, 2017-01-26 at 14:08 +0200, Razvan Cojocaru wrote:
> Hello,
>=20
> I see that there's currently no xc_vcpu_pause() (there's only
> xc_domain_pause(), which freezes all the VCPUs), but there's
> XEN_DOMCTL_gdbsx_pausevcpu, which is only used by
> tools/debugger/gdbsx/xg/xg_main.c.
>=20
> Wouldn't it make sense to have a "regular" DOMCTL in libxc that the
> debugger, as well as other clients, would make use of (said
> xc_vcpu_pause() / xc_vcpu_unpause())?
>=20
You mean you'd want to implement xc_vcpu_pause() by means of
the=C2=A0XEN_DOMCTL_gdbsx_pausevcpu?

What's the use case for that, and does it fit with the implementation
of said hypercall (which, e.g., requires that the domain is already
paused)?

Regards,
Dario
--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
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