Yes, I'd be curious what 32 bit instructions don't work on an x86_64 arch. As you mentioned, all other available features (sse, nested vmx, hardware aes) that Qemu can provide are available via setting cpu model, which is supported. Worst case you have to tweak the cpu model definitions in the libvirt configs.
On Tue, Sep 9, 2014 at 9:11 AM, Laurent Steff <laurent.st...@inria.fr> wrote: > Hi Rohit, > > Thanks for your answer ! > > I'm missing real use cases of 32 bit emulation, only knowing that some > researchers are working on low-level instructions on various CPU > architectures. > > And seeing CPU features (in our case "lm" but I've also heard of "sse*") > that could not be implemented fools their low-level code. > > For now we seem to have only a ugly workaround (updating Cloudstack > database) and we're > trying to learn how to code in Cloudstack to propose patches. > > We will certainly add a feature request too, enabling on UI/API > an "advanced choice for advanced users" for instances on libvirt/KVM > clusters : > - cpu arch > - cpu models (AFAIK only available for now as guest.cpu.model > on Cloudstack KVM agent configuration) > - cpu features > > Best Regards, > > ----- Mail original ----- > > De: "Rohit Yadav" <rohit.ya...@shapeblue.com> > > À: dev@cloudstack.apache.org > > Envoyé: Lundi 8 Septembre 2014 18:21:34 > > Objet: Re: Cloudstack/KVM/arch i686 case reopened > > > > Hi Laurent, > > > > You’re welcome to contribute any work that you’ve already done. Else, you > > could have any developers at INRIA or may sponsor developers to work on > this > > issue and the ACS community will be happy to assist them during > development, > > help with patches, reviews etc. > > > > I’m curious why your researchers would need “real” 32 bit CPUs support > and > > what the use cases are. > > One can always run 32bit VMs on 64bit CPU/KVM. Will be happy to help. > > > > On 08-Sep-2014, at 5:13 pm, Laurent Steff <laurent.st...@inria.fr> > wrote: > > > Hello, > > > > > > As a lot of our researchers still need "real" 32bits CPU support > > > in KVM/Qemu with CloudStack, we reopened and old bug reported by > > > a colleague almost one year ago, without any activity. > > > > > > https://issues.apache.org/jira/browse/CLOUDSTACK-7511 > > > > > > Tell us if we could help (testing, patch, ...) > > > > > > Thanks in advance. > > > > > > Regards, > > > -- > > > Laurent Steff > > > > > > DSI/SESI > > > INRIA > > > http://www.inria.fr/ > > > > Regards, > > Rohit Yadav > > Software Architect, ShapeBlue > > M. +41 779015219 | rohit.ya...@shapeblue.com > > Blog: bhaisaab.org | Twitter: @_bhaisaab > > > > > > > > Find out more about ShapeBlue and our range of CloudStack related > services > > > > IaaS Cloud Design & Build< > http://shapeblue.com/iaas-cloud-design-and-build//> > > CSForge – rapid IaaS deployment framework<http://shapeblue.com/csforge/> > > CloudStack Consulting<http://shapeblue.com/cloudstack-consultancy/> > > CloudStack Infrastructure > > Support<http://shapeblue.com/cloudstack-infrastructure-support/> > > CloudStack Bootcamp Training > > Courses<http://shapeblue.com/cloudstack-training/> > > > > This email and any attachments to it may be confidential and are intended > > solely for the use of the individual to whom it is addressed. Any views > or > > opinions expressed are solely those of the author and do not necessarily > > represent those of Shape Blue Ltd or related companies. If you are not > the > > intended recipient of this email, you must neither take any action based > > upon its contents, nor copy or show it to anyone. Please contact the > sender > > if you believe you have received this email in error. Shape Blue Ltd is a > > company incorporated in England & Wales. ShapeBlue Services India LLP is > a > > company incorporated in India and is operated under license from Shape > Blue > > Ltd. Shape Blue Brasil Consultoria Ltda is a company incorporated in > Brasil > > and is operated under license from Shape Blue Ltd. ShapeBlue SA Pty Ltd > is a > > company registered by The Republic of South Africa and is traded under > > license from Shape Blue Ltd. ShapeBlue is a registered trademark. > > > > -- > Laurent Steff > > DSI/SESI > INRIA > Tél. : +33 1 39 63 50 81 > Port. : +33 6 87 66 77 85 > http://www.inria.fr/ >
