From: Marcelo Tosatti <mtosatti@redhat.com>
To: David Windsor <dwindsor@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: [RFC] allow userspace to set MSR no-ops
Date: Tue, 3 Nov 2009 13:12:03 -0200 [thread overview]
Message-ID: <20091103151203.GA10990@amt.cnet> (raw)
In-Reply-To: <25a1d91b0910281023u5a44576bh682ae4c59cfa7be9@mail.gmail.com>
On Wed, Oct 28, 2009 at 01:23:07PM -0400, David Windsor wrote:
> Hi,
>
> I've encountered a situation in which I would like to allow userspace
> to set the MSRs which KVM should not emulate and instead implement
> these as no-ops.
>
> I have not seen any work in this space, furthermore there is an item
> on the KVM TODO that is very similar to what I'm trying to do.
>
> The userspace interface is an extension of kvm_vcpu_ioctl, adding the
> KVM_SET_MSRS_NOOP flag. It takes a struct kvm_msrs as a list of which
> MSRs should be no-ops and adds the field noop to struct kvm_msr_entry.
> This patch only affects vmx, but if the approach is sane, I can
> extend it to support svm as well.
Does the ignore_msrs kvm.ko parameter achieve what you want?
next prev parent reply other threads:[~2009-11-03 15:51 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-28 17:23 [RFC] allow userspace to set MSR no-ops David Windsor
2009-10-28 18:31 ` Richard Winthers
[not found] ` <944f46790910281128j345c13adre8d0dc533bc4abb1@mail.gmail.com>
2009-10-28 21:04 ` David Windsor
2009-11-03 15:12 ` Marcelo Tosatti [this message]
2009-11-04 9:10 ` Avi Kivity
-- strict thread matches above, loose matches on Subject: below --
2009-10-28 18:06 David Windsor
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=20091103151203.GA10990@amt.cnet \
--to=mtosatti@redhat.com \
--cc=dwindsor@gmail.com \
--cc=kvm@vger.kernel.org \
/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