From: Gerd Hoffmann <kraxel@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: Alexander Graf <agraf@suse.de>,
Ed Swierk <eswierk@aristanetworks.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: Userspace MSR handling
Date: Mon, 25 May 2009 13:03:48 +0200 [thread overview]
Message-ID: <4A1A7B14.5000205@redhat.com> (raw)
In-Reply-To: <4A193878.4030206@redhat.com>
On 05/24/09 14:07, Avi Kivity wrote:
> I agree however that the Xen hypercall page protocol has no business in
> kvm.ko. But can't we implement it in emu? Xenner conveniently places a
> ring 0 stub in the guest, we could trap the MSR there and emulate it
> entirely in the guest.
No. The case where handling the msr writes is needed is the pv-on-hvm
driver support. For pv kernels it could be handled by emu if it would
be needed, but pv kernels don't need the msr stuff in the first place.
There should be a longish mail about that in the list archive ...
cheers,
Gerd
next prev parent reply other threads:[~2009-05-25 11:03 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-22 20:11 Userspace MSR handling Ed Swierk
2009-05-23 8:57 ` Alexander Graf
2009-05-24 12:07 ` Avi Kivity
2009-05-24 16:15 ` Alexander Graf
2009-05-26 11:31 ` Avi Kivity
2009-05-25 11:03 ` Gerd Hoffmann [this message]
2009-05-25 11:20 ` Avi Kivity
2009-05-25 11:29 ` Gerd Hoffmann
2009-05-25 11:31 ` Avi Kivity
2009-05-27 16:12 ` Ed Swierk
2009-05-27 16:28 ` Avi Kivity
2009-05-27 17:09 ` Ed Swierk
2009-05-27 19:16 ` Gerd Hoffmann
2009-05-27 23:00 ` Ed Swierk
2009-05-28 8:53 ` Avi Kivity
2009-05-29 9:47 ` Gerd Hoffmann
2009-05-31 8:21 ` Avi Kivity
2009-05-25 11:16 ` Gerd Hoffmann
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