From: Tim Deegan <tim@xen.org>
To: George Dunlap <george.dunlap@eu.citrix.com>
Cc: Keir Fraser <keir@xen.org>, Jan Beulich <jbeulich@suse.com>,
xen-devel@lists.xen.org
Subject: Re: [PATCH RFC v13 03/20] Introduce pv guest type and has_hvm_container macros
Date: Thu, 26 Sep 2013 12:53:59 +0100 [thread overview]
Message-ID: <20130926115359.GC54428@ocelot.phlegethon.org> (raw)
In-Reply-To: <1379955000-11050-4-git-send-email-george.dunlap@eu.citrix.com>
Hi,
At 17:49 +0100 on 23 Sep (1379958583), George Dunlap wrote:
> The goal of this patch is to classify conditionals more clearly, as to
> whether they relate to pv guests, hvm-only guests, or guests with an
> "hvm container" (which will eventually include PVH).
- speculative wombling begins -
Reading this for the (apparently) 13th time, it strikes me that this
distinction feels wrong, like entities are being multiplied beyond
necessity.
A PVH guest is basically a HVM guest that starts with paging enabled and
uses event channel instead of virtual APIC.
I'm not sure this needs any special treatment from Xen. We can supply a
PVH guest with an APIC and if it never uses it, fine. And we can supply
all HVM guests with any extra hypercalls that PVH needs (for vcpu
bringup &c). Things like not having a qemu process to serve ioreqs can
be arranged by the toolstack.
This is from a position of ignorance, of course, and I'm happy to be
corrected by the people who've actually been hacking on the code.
- normal wombling resumes -
Tim.
next prev parent reply other threads:[~2013-09-26 11:53 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-23 16:49 [PATCH RFC v13 00/20] Introduce PVH domU support George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 01/20] Allow vmx_update_debug_state to be called when v!=current George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 02/20] pvh prep: code motion George Dunlap
2013-09-26 9:20 ` Tim Deegan
2013-10-04 15:29 ` Roger Pau Monné
2013-09-23 16:49 ` [PATCH RFC v13 03/20] Introduce pv guest type and has_hvm_container macros George Dunlap
2013-09-26 11:53 ` Tim Deegan [this message]
2013-09-26 12:54 ` Ian Campbell
2013-09-26 13:46 ` George Dunlap
2013-09-26 15:31 ` Konrad Rzeszutek Wilk
2013-09-26 16:24 ` Tim Deegan
2013-09-23 16:49 ` [PATCH RFC v13 04/20] pvh: Introduce PVH guest type George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 05/20] pvh: Disable unneeded features of HVM containers George Dunlap
2013-09-26 15:22 ` Jan Beulich
2013-11-04 12:31 ` George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 06/20] pvh: vmx-specific changes George Dunlap
2013-09-26 15:29 ` Jan Beulich
2013-11-07 14:14 ` George Dunlap
2013-11-07 14:29 ` Jan Beulich
2013-10-07 15:55 ` Roger Pau Monné
2013-10-07 16:06 ` George Dunlap
2013-10-07 16:12 ` Tim Deegan
2013-10-07 16:20 ` George Dunlap
2013-10-07 17:08 ` Tim Deegan
2013-10-08 8:45 ` Jan Beulich
2013-11-07 12:02 ` George Dunlap
2013-11-07 13:12 ` Jan Beulich
2013-09-23 16:49 ` [PATCH RFC v13 07/20] pvh: Do not allow PVH guests to change paging modes George Dunlap
2013-09-26 15:30 ` Jan Beulich
2013-09-23 16:49 ` [PATCH RFC v13 08/20] pvh: PVH access to hypercalls George Dunlap
2013-09-26 15:33 ` Jan Beulich
2013-09-27 21:15 ` Mukesh Rathor
2013-09-30 6:38 ` Jan Beulich
2013-09-23 16:49 ` [PATCH RFC v13 09/20] pvh: Use PV e820 George Dunlap
2013-09-27 17:57 ` Konrad Rzeszutek Wilk
2013-09-23 16:49 ` [PATCH RFC v13 10/20] pvh: Support guest_kernel_mode for PVH George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 11/20] pvh: Support read_segment_register " George Dunlap
2013-09-26 15:36 ` Jan Beulich
2013-09-23 16:49 ` [PATCH RFC v13 12/20] pvh: read_descriptor for PVH guests George Dunlap
2013-09-27 18:34 ` Konrad Rzeszutek Wilk
2013-09-23 16:49 ` [PATCH RFC v13 13/20] pvh: Set up more PV stuff in set_info_guest George Dunlap
2013-09-26 15:43 ` Jan Beulich
2013-11-07 15:57 ` George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 14/20] pvh: Use PV handlers for emulated forced invalid ops, cpuid, and IO George Dunlap
2013-09-26 15:52 ` Jan Beulich
2013-09-23 16:49 ` [PATCH RFC v13 15/20] pvh: Disable 32-bit guest support for now George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 16/20] pvh: Restrict tsc_mode to NEVER_EMULATE " George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 17/20] pvh: Disable debug traps when doing pv emulation for PVH domains George Dunlap
2013-09-26 15:55 ` Jan Beulich
2013-09-23 16:49 ` [PATCH RFC v13 18/20] pvh: Documentation George Dunlap
2013-09-23 16:49 ` [PATCH RFC v13 19/20] PVH xen tools: libxc changes to build a PVH guest George Dunlap
2013-09-27 18:37 ` Konrad Rzeszutek Wilk
2013-10-18 16:45 ` Roger Pau Monné
2013-11-04 11:56 ` George Dunlap
2013-11-04 13:18 ` Roger Pau Monné
2013-09-23 16:50 ` [PATCH RFC v13 20/20] PVH xen tools: libxl changes to create " George Dunlap
2013-09-27 18:38 ` Konrad Rzeszutek Wilk
2013-09-27 13:08 ` [PATCH RFC v13 00/20] Introduce PVH domU support Konrad Rzeszutek Wilk
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