From: Paolo Bonzini <pbonzini@redhat.com>
To: "Avi Kivity" <avi.kivity@gmail.com>,
"Nadav Amit" <namit@cs.technion.ac.il>,
"KVM list" <kvm@vger.kernel.org>,
"Radim Krčmář" <rkrcmar@redhat.com>
Subject: Re: 2 CPU Conformance Issue in KVM/x86
Date: Mon, 09 Mar 2015 20:33:08 +0100 [thread overview]
Message-ID: <54FDF574.1020102@redhat.com> (raw)
In-Reply-To: <54FDD39C.9060908@gmail.com>
On 09/03/2015 18:08, Avi Kivity wrote:
> Is the issue emulating a higher MAXPHYADDR on the guest than is
> available on the host? I don't think there's any need to support that.
No, indeed. The only problem is that the failure mode is quite horrible
(you get a triple fault, possibly while the guest is running).
If you need that, disable EPT. :)
> Emulating a lower setting on the guest than is available on the host is,
> I think, desirable. Whether it would work depends on the relative
> priority of EPT misconfiguration exits vs. page table permission faults.
Yes, that's doable.
Paolo
next prev parent reply other threads:[~2015-03-09 19:33 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 8:34 2 CPU Conformance Issue in KVM/x86 Nadav Amit
2015-03-03 9:52 ` Paolo Bonzini
2015-03-03 10:18 ` Nadav Amit
2015-03-03 14:31 ` Radim Krčmář
2015-03-09 17:08 ` Avi Kivity
2015-03-09 17:51 ` Nadav Amit
2015-03-09 18:23 ` Avi Kivity
2015-03-09 19:07 ` Nadav Amit
2015-03-09 19:19 ` Avi Kivity
2015-03-09 19:38 ` Paolo Bonzini
2015-03-09 19:49 ` Avi Kivity
2015-03-10 10:47 ` Paolo Bonzini
2015-03-10 20:38 ` Avi Kivity
2015-03-09 19:33 ` Paolo Bonzini [this message]
2015-03-09 19:50 ` Avi Kivity
2015-03-10 10:44 ` Paolo Bonzini
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=54FDF574.1020102@redhat.com \
--to=pbonzini@redhat.com \
--cc=avi.kivity@gmail.com \
--cc=kvm@vger.kernel.org \
--cc=namit@cs.technion.ac.il \
--cc=rkrcmar@redhat.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