From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53834) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fEPUV-00022z-WB for qemu-devel@nongnu.org; Thu, 03 May 2018 21:26:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fEPUU-0004BL-Vn for qemu-devel@nongnu.org; Thu, 03 May 2018 21:26:32 -0400 Date: Fri, 4 May 2018 10:11:02 +1000 From: David Gibson Message-ID: <20180504001102.GH13229@umbus.fritz.box> References: <152538217073.223014.17347204768561945420.stgit@bahia.lan> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="a58rN+WbXIGauCK9" Content-Disposition: inline In-Reply-To: <152538217073.223014.17347204768561945420.stgit@bahia.lan> Subject: Re: [Qemu-devel] [PATCH 0/3] spapr: fix backward migration from POWER9 to POWER8 hosts List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Greg Kurz Cc: qemu-devel@nongnu.org, qemu-ppc@nongnu.org, Laurent Vivier , =?iso-8859-1?Q?C=E9dric?= Le Goater , Suraj Jitindar Singh , Bharata B Rao --a58rN+WbXIGauCK9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, May 03, 2018 at 11:16:10PM +0200, Greg Kurz wrote: > Hi, >=20 > It is expected to be able to migrate a guest started with >=20 > -machine max-cpu-compat=3Dpower8 >=20 > from a POWER9 host to a POWER8 host. It works with recent QEMU versions, > but it is badly broken if the destination runs QEMU 2.7 or older. >=20 > This can cause problems in cloud environments that still have systems with > older QEMU versions, eg, hosts running ubuntu LTS 16.04.4 (QEMU 2.5) which > are likely to stay around until admins could transition to some newer OS. >=20 > This series was lightly tested, but the patches are simple enough, so I'm > confident they shouldn't break anything :) >=20 > Please review as I'd like these to go to QEMU 2.11.2 as well. Applied to ppc-for-2.13. As you say, these should probably go to the 2.12 and 2.11 stable trees too. --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_ | _way_ _around_! http://www.ozlabs.org/~dgibson --a58rN+WbXIGauCK9 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEdfRlhq5hpmzETofcbDjKyiDZs5IFAlrrpRYACgkQbDjKyiDZ s5Ieww/+J6l5Gm2NmACi6RFiJ5ullsaHFL6xibvhzx0XVAEHtHzt9o4apHRNIwIs Jp+F8AXpZcvsP//8XkXDxquTQ0BysM4MdX03BK7u2NS6Zjj0hBOUTi5w0hvY3VdL rfxSQXIllbGA33ABVL3BbP8mOKZ4j6/1l3KPOyYtVEl+etH+HLyj6Zu7yiD/k66b Skt5We6MZJt0Hhz4Tah1iRlnCt3D3E6xYJS3KTr0l+99FR8YL5nkAUd1fO3Z/pIp LVonapbu+rbLJ7WcoSrawpKsvROVTB4zoLMZ6s9yHCzJjgptVYRI8Y9P5toWH2Ts Atlit2sTbU0AqcAIcifipGpAZnmozwt5ZsMp0ZRl6+HaOKDb8jZW38u2pnk42NBU mgJoJ4qi99ClqfyeXOnLTKnTadfnkkgWaH42JkqLkKCxS8DhFWw5ClTMKQ7pfOoQ F5vV1hcrrLj7Flt8FxUsH0tiS6jDbLeqCf6pPXk9wgai9wjE9xTVg1OYz8hek6Yc ReCAsv0utDriTmigk1raljSuiNC0rQ00JpDRSSmPTpAjlq0IAGab6gk5K0VYkcR5 eKb/kpaRWZh2UG4J30BIiA4OYHgBUp7cetJwtDvK6QaHeBvez9A5W8qqIEKMfAf/ KWDxTl7xG3myj8dMnkxi6Ar4kOFmMzY9tEwtyf9SRK/M0hFIn0Y= =SGvQ -----END PGP SIGNATURE----- --a58rN+WbXIGauCK9--