From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [RFC] ARM VM System Sepcification Date: Wed, 26 Feb 2014 21:19:05 +0100 Message-ID: <530E4C39.9010804@redhat.com> References: <20140226183454.GA14639@cbox> <5553754.0b4gMg5OS7@wuerfel> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Christoffer Dall , cross-distro@lists.linaro.org, "kvmarm@lists.cs.columbia.edu" , "kvm@vger.kernel.org" , xen-devel@lists.xen.org, Peter Maydell , Ian Campbell , Michael Casadevall , "marc.zyngier@arm.com" , Rob Herring , Leif Lindholm , Robie Basak , Stefano Stabellini , Grant Likely To: Arnd Bergmann , linux-arm-kernel@lists.infradead.org Return-path: Received: from mail-qc0-f180.google.com ([209.85.216.180]:45397 "EHLO mail-qc0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751950AbaBZUTM (ORCPT ); Wed, 26 Feb 2014 15:19:12 -0500 Received: by mail-qc0-f180.google.com with SMTP id i17so2221834qcy.11 for ; Wed, 26 Feb 2014 12:19:11 -0800 (PST) In-Reply-To: <5553754.0b4gMg5OS7@wuerfel> Sender: kvm-owner@vger.kernel.org List-ID: Il 26/02/2014 20:55, Arnd Bergmann ha scritto: >> > For more information about UEFI and ACPI booting, see [4] and [5]. > What's the point of having ACPI in a virtual machine? You wouldn't > need to abstract any of the hardware in AML since you already know > what the virtual hardware is, so I can't see how this would help > anyone. In x86 land it's been certainly helpful to abstract hotplug capabilities. For ARM it could be the same. Not so much for PCI (ARM probably can use native PCIe hotplug and standard hotplug controllers; on x86 we started with PCI and also have to deal with Windows's lack of support for SHPC), but it could help for CPU and memory hotplug. > Did you notice we are removing mach-virt now? Probably no point > mentioning it here. Peter, do we still want mach-virt support in QEMU then? Paolo From mboxrd@z Thu Jan 1 00:00:00 1970 From: pbonzini@redhat.com (Paolo Bonzini) Date: Wed, 26 Feb 2014 21:19:05 +0100 Subject: [RFC] ARM VM System Sepcification In-Reply-To: <5553754.0b4gMg5OS7@wuerfel> References: <20140226183454.GA14639@cbox> <5553754.0b4gMg5OS7@wuerfel> Message-ID: <530E4C39.9010804@redhat.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Il 26/02/2014 20:55, Arnd Bergmann ha scritto: >> > For more information about UEFI and ACPI booting, see [4] and [5]. > What's the point of having ACPI in a virtual machine? You wouldn't > need to abstract any of the hardware in AML since you already know > what the virtual hardware is, so I can't see how this would help > anyone. In x86 land it's been certainly helpful to abstract hotplug capabilities. For ARM it could be the same. Not so much for PCI (ARM probably can use native PCIe hotplug and standard hotplug controllers; on x86 we started with PCI and also have to deal with Windows's lack of support for SHPC), but it could help for CPU and memory hotplug. > Did you notice we are removing mach-virt now? Probably no point > mentioning it here. Peter, do we still want mach-virt support in QEMU then? Paolo