From: "Michael S. Tsirkin" <mst@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Markus Armbruster" <armbru@redhat.com>,
qemu-devel@nongnu.org, "Don Slutz" <dslutz@verizon.com>,
"Luiz Capitulino" <lcapitulino@redhat.com>,
"Anthony Liguori" <aliguori@amazon.com>,
"Andreas Färber" <afaerber@suse.de>,
"Richard Henderson" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [PATCH v7 0/9] Add limited support of VMware's hyper-call rpc
Date: Wed, 17 Jun 2015 20:43:57 +0200 [thread overview]
Message-ID: <20150617184357.GA7080@redhat.com> (raw)
In-Reply-To: <5581A4E8.8080505@redhat.com>
On Wed, Jun 17, 2015 at 06:48:40PM +0200, Paolo Bonzini wrote:
>
>
> On 17/06/2015 18:29, Michael S. Tsirkin wrote:
> > On Wed, Jun 17, 2015 at 06:17:19PM +0200, Paolo Bonzini wrote:
> >>
> >>
> >> On 17/06/2015 16:29, Michael S. Tsirkin wrote:
> >>> On Wed, Jun 17, 2015 at 04:27:13PM +0200, Paolo Bonzini wrote:
> >>>>
> >>>>
> >>>> On 17/06/2015 16:18, Michael S. Tsirkin wrote:
> >>>>>>> Yes, that's what was done for parallel and pcspk as well. There's no
> >>>>>>> infrastructure to avoid it.
> >>>>>>>
> >>>>>>> Paolo
> >>>>> How do you mean? We have multiple ways to keep devices
> >>>>> compatible with old versions.
> >>>>> Set a new property to skip the extra stuff.
> >>>>
> >>>> Not if the device didn't have a vmstate at all, unfortunately.
> >>>
> >>> Skip creating the device completely for old machine types.
> >>
> >> Which device? The vmstate is tied to the same device that has always
> >> been created.
> >
> > Just disable the new functionality. Make it behave in
> > a compatible way.
>
> Ok. Doesn't solve the fact that the migration stream changes just
> because dc->vmsd was NULL and now isn't. We cannot add a subsection:
> there is no toplevel section for it to hang it from.
It seems pretty obvious:
+ vmport_rpc = isa_try_create(isa_bus, "vmport_rpc");
+ if (vmport_rpc) {
+ qdev_init_nofail(DEVICE(vmport_rpc));
+ }
Don't do this. Let user specify the device using -device vmport_rpc.
Then all issues just go away. I don't see any reason not to do it like
this - we should have done the same for other vmport things.
--
MST
next prev parent reply other threads:[~2015-06-17 18:44 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-12 14:05 [Qemu-devel] [PATCH v7 0/9] Add limited support of VMware's hyper-call rpc Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [BUGFIX][PATCH v7 1/9] vmport: The io memory region needs to be at least a size of 4 Don Slutz
2015-06-12 22:38 ` Eric Blake
2015-06-15 13:53 ` Don Slutz
2015-06-15 15:09 ` Eric Blake
2015-06-15 16:15 ` Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 2/9] vmport: Switch to trace Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [BUGFIX][PATCH v7 3/9] vmport: Fix vmport_cmd_ram_size Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 4/9] vmport_rpc: Add the object vmport_rpc Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 5/9] vmport_rpc: Add limited support of VMware's hyper-call rpc Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 6/9] vmport_rpc: Add QMP access to vmport_rpc object Don Slutz
2015-06-15 15:53 ` Eric Blake
2015-06-17 16:42 ` Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 7/9] vmport_rpc: Add migration Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 8/9] vmport: Add VMware all ring hack Don Slutz
2015-06-12 14:05 ` [Qemu-devel] [PATCH v7 9/9] MAINTAINERS: add VMware port Don Slutz
2015-06-17 13:44 ` [Qemu-devel] [PATCH v7 0/9] Add limited support of VMware's hyper-call rpc Paolo Bonzini
2015-06-17 22:26 ` Don Slutz
2015-06-18 7:58 ` Michael S. Tsirkin
2015-06-18 8:33 ` Paolo Bonzini
2015-06-18 9:40 ` Michael S. Tsirkin
2015-06-18 8:33 ` Paolo Bonzini
2015-06-17 14:11 ` Michael S. Tsirkin
2015-06-17 14:13 ` Paolo Bonzini
2015-06-17 14:18 ` Michael S. Tsirkin
2015-06-17 14:27 ` Paolo Bonzini
2015-06-17 14:29 ` Michael S. Tsirkin
2015-06-17 16:17 ` Paolo Bonzini
2015-06-17 16:29 ` Michael S. Tsirkin
2015-06-17 16:48 ` Paolo Bonzini
2015-06-17 18:43 ` Michael S. Tsirkin [this message]
2015-06-17 19:15 ` Paolo Bonzini
2015-06-17 19:22 ` Michael S. Tsirkin
2015-06-17 19:24 ` Paolo Bonzini
2015-06-17 19:29 ` Michael S. Tsirkin
2015-06-17 17:03 ` Don Slutz
2015-06-17 17:14 ` Paolo Bonzini
2015-06-17 17:25 ` Paolo Bonzini
2015-06-17 17:34 ` Don Slutz
2015-06-17 18:58 ` Michael S. Tsirkin
2015-06-18 18:40 ` Don Slutz
2015-06-17 18:45 ` Michael S. Tsirkin
2015-06-17 18:45 ` Michael S. Tsirkin
2015-06-18 7:03 ` Gerd Hoffmann
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20150617184357.GA7080@redhat.com \
--to=mst@redhat.com \
--cc=afaerber@suse.de \
--cc=aliguori@amazon.com \
--cc=armbru@redhat.com \
--cc=dslutz@verizon.com \
--cc=lcapitulino@redhat.com \
--cc=pbonzini@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=rth@twiddle.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.