From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52069) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ee1dF-00047G-68 for qemu-devel@nongnu.org; Tue, 23 Jan 2018 11:41:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ee1dE-00061Z-EH for qemu-devel@nongnu.org; Tue, 23 Jan 2018 11:41:09 -0500 References: <20180118020157.25401-1-ehabkost@redhat.com> <1d3ee391-bbb2-3c49-b3b0-8f189e0fd096@de.ibm.com> From: David Hildenbrand Message-ID: Date: Tue, 23 Jan 2018 17:40:57 +0100 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [qemu-s390x] [PULL 0/8] x86 queue, 2018-01-17 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell , Christian Ehrhardt Cc: Eduardo Habkost , Michael Roth , QEMU Developers , Christian Borntraeger , qemu-s390x , qemu-ppc@nongnu.org, Suraj Jitindar Singh , Paolo Bonzini , Richard Henderson On 23.01.2018 12:14, Peter Maydell wrote: > On 23 January 2018 at 10:34, Christian Ehrhardt > wrote: >> Also adding Suraj for a statement in this regard about his "[QEMU-PPC] >> [PATCH V5 0/7] target/ppc: Rework spapr_caps" series which I think is >> the PPC version of all of this right? >> Not sure who to add for Arm :-/ > > AIUI for Arm no QEMU changes should be required -- KVM VMs always > use the same CPU type as the host, and the kernel always exposes > the same MIDR (main ID register) value to the guest as the host has, > and the guest kernel fixes will key off the MIDR. Unrelated, but how can ARM make sure that migration back and forth works reliably? (e.g. from a system with spectre fixes to a system without spectre fixes) Thanks! > > thanks > -- PMM > -- Thanks, David / dhildenb