From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kiszka Subject: Re: Xen as L1 support Date: Wed, 15 May 2013 19:49:32 +0200 Message-ID: <5193CAAC.4090001@web.de> References: <1B4B44D9196EFF41AE41FDA404FC0A100112FE48@SHSMSX101.ccr.corp.intel.com> <5193A2CC.9050304@redhat.com> <5193C93D.5020707@web.de> <20130515174547.GF24814@redhat.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="----enig2HVSINGDBWITLBNJGAJUJ" Cc: Paolo Bonzini , "Ren, Yongjie" , Alex Palesandro , "kvm@vger.kernel.org" To: Gleb Natapov Return-path: Received: from mout.web.de ([212.227.15.3]:56841 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759757Ab3EORtr (ORCPT ); Wed, 15 May 2013 13:49:47 -0400 In-Reply-To: <20130515174547.GF24814@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: This is an OpenPGP/MIME signed message (RFC 4880 and 3156) ------enig2HVSINGDBWITLBNJGAJUJ Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 2013-05-15 19:45, Gleb Natapov wrote: > On Wed, May 15, 2013 at 07:43:25PM +0200, Jan Kiszka wrote: >> On 2013-05-15 16:59, Paolo Bonzini wrote: >>> Il 15/05/2013 03:24, Ren, Yongjie ha scritto: >>>>> -----Original Message----- >>>>> From: kvm-owner@vger.kernel.org [mailto:kvm-owner@vger.kernel.org] >>>>> On Behalf Of Alex Palesandro >>>>> Sent: Tuesday, May 14, 2013 10:51 PM >>>>> To: kvm@vger.kernel.org >>>>> Subject: Fwd: Xen as L1 support >>>>> >>>>> Hi, >>>>> I'm new to KVM. I'm doing some test on nested Virtualization with X= en >>>>> and KVM. I tried to test the Xen hypervisor as L1 over KVM ( Linux >>>>> 3.9.0) and I found this in >>>>> "xm dmesg" log ( for the complete log, see the attached file). >>>>> -------------------------------------------- >>>>> (XEN) VMX: CPU0 has insufficent VMExit Control (00036fff but requir= es >>>>> min 00008200) >>>>> (XEN) VMX: failed to initialise. >>>>> -------------------------------------------- >>> >>> This is the "Acknowledge interrupt on exit" control. It shouldn't be= >>> hard to implement it. >> >> Isn't this a pretty recent feature Xen should be able to live without = - >> if it finds itself on a (virtually) older CPU? >> > IIRC the feature was always there. KVM started to use it only from 3.10= since > posted interrupt requires it. Ah, indeed. Can even find it on a 6-years old Xeon. Jan ------enig2HVSINGDBWITLBNJGAJUJ Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iEYEARECAAYFAlGTyqwACgkQitSsb3rl5xTDYgCfVTDx5lN8Lah7avbfc5jn1PAN oRMAnAx8TnmuntFfSr9JaT9Y26bwG+Io =Qo+c -----END PGP SIGNATURE----- ------enig2HVSINGDBWITLBNJGAJUJ--