From: Avi Kivity <avi@redhat.com>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Marcelo Tosatti <mtosatti@redhat.com>,
Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>,
Alexander Graf <agraf@suse.de>,
Suzuki Poulose <suzuki@in.ibm.com>
Subject: Re: [Qemu-devel] [PATCH 3/3] QEMU kvm/i386 : Adding KICK_VCPU capability support in i386 target.
Date: Mon, 26 Dec 2011 16:07:53 +0200 [thread overview]
Message-ID: <4EF87FB9.6060208@redhat.com> (raw)
In-Reply-To: <4EEF461E.8000107@siemens.com>
On 12/19/2011 04:11 PM, Jan Kiszka wrote:
> >>
> >> Backwards compatibility
> >
> > If we want backwards compatibility, we need more than just a simple feature check, no? Oh, you feed that into CPUID? That's nifty. Ok, so you behave like VMX/SVM do on real hardware - you always expose the functionality but don't list it in CPUID for older user space.
>
> Do we want this to be on when providing a compat machine type ("pc-0.12"
> etc.) to the guest? Then it does need more work (see the dance around
> kvmclock).
We do. I have a feeling the whole cpuid stuff, paravirt and
non-paravirt, needs some fixing in this area. It's different than the
normal compat code since not only qemu, but also kvm and the host cpu
have a say in what's supported and what's not.
--
error compiling committee.c: too many arguments to function
next prev parent reply other threads:[~2011-12-26 14:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-04 18:25 [Qemu-devel] [PATCH 0/3] QEMU kvm: Adding KICK_VCPU capability to i386 kvm Raghavendra K T
2011-12-04 18:25 ` [Qemu-devel] [PATCH 1/3] QEMU kvm: Syncing linux headers to 3.2.0-rc1 Raghavendra K T
2011-12-19 13:51 ` Alexander Graf
2011-12-04 18:26 ` [Qemu-devel] [PATCH 2/3] QEMU kvm: Syncing linux headers to support KICK_VCPU capability Raghavendra K T
2011-12-19 13:52 ` Alexander Graf
2011-12-04 18:26 ` [Qemu-devel] [PATCH 3/3] QEMU kvm/i386 : Adding KICK_VCPU capability support in i386 target Raghavendra K T
2011-12-19 13:54 ` Alexander Graf
2011-12-19 13:59 ` Avi Kivity
2011-12-19 14:03 ` Alexander Graf
2011-12-19 14:11 ` Jan Kiszka
2011-12-26 14:07 ` Avi Kivity [this message]
2011-12-26 17:13 ` Raghavendra K T
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=4EF87FB9.6060208@redhat.com \
--to=avi@redhat.com \
--cc=agraf@suse.de \
--cc=jan.kiszka@siemens.com \
--cc=kvm@vger.kernel.org \
--cc=mtosatti@redhat.com \
--cc=qemu-devel@nongnu.org \
--cc=raghavendra.kt@linux.vnet.ibm.com \
--cc=suzuki@in.ibm.com \
--cc=vatsa@linux.vnet.ibm.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).