Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
Try: qemu-system-x86_64 By default, you use "qemu" which is a 32-bit emulator. I think SVM is available only to 64-bit guests. The 64-bit emulator is named: "qemu-system-x86_64", and don't worry, your CPU will work, despite being 32-bit without SVM. 64-bit part is for guests, not for host. I'm not sure if your guest OS also needs to be 64-bit, but it better be. -- -Alexey Eremenko "Technologov"
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
En réponse à Alexander Graf <[EMAIL PROTECTED]> : > >> He was talking about running SVM code in KQemu/KVM. It > >>might work with kqemu No, I have a intel PIII CPU without vt extensions. I want to test KVM. My idea is to use a qemu machine emulating the VT instruction. So, in the qemu machine, I could load KVM. But it doesn't seem to work. I downloaded a qemu-0.9.1, compiled it. A cat /proc/cpuinfo inside qemu doesn't show me vmx nor svm. Am I forgotting something? Thanks Eurolines : Voyagez au meilleur prix : http://www.alinto.com/pub/
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
On Jan 20, 2008, at 8:52 PM, andrzej zaborowski wrote: On 20/01/2008, Alexander Graf <[EMAIL PROTECTED]> wrote: He was talking about running SVM code in KQemu/KVM. It might work with kqemu (I honestly have not tested it, but see no reason it shouldn't), but definitely not with KVM. Simply said, you can not run KVM inside of a KVM virtualized machine. What would be the problem with supporting that in KVM? The host SVM should just report that the guest is trying to execute an SVM insn and generate an Illegal Operation which would be handled by qemu. Regards Yes, you're completely right about this. The main reason it isn't implemented in kvm is that nobody did it yet. It is actually one of the things on my "would like to do"-list, so if things stay the way they are, maybe you will see this feature in kvm someday. Regards, Alex
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
> So, as qemu emulates CPU, does it emulates [pacifica|VT] > extensions too? > With a patch? Yes, Qemu 0.91, can emulate AMD Pacifica/SVM, according to: http://fabrice.bellard.free.fr/qemu/changelog.html So yes, theoretically KVM should work inside Qemu, but don't expect real-hardware performance. -- -Alexey Eremenko "Technologov"
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
En réponse à Alexander Graf <[EMAIL PROTECTED]> : > He was talking about running SVM code in KQemu/KVM. It might > work with > kqemu (I honestly have not tested it, but see no reason it > shouldn't), > but definitely not with KVM. Simply said, you can not run KVM > inside > of a KVM virtualized machine. > I just want to run KVM in a non VT machine. And I want to test a lot of things. So if qemu can emulate it, it's really good for me. I need to test hvm-Xen too. So, as qemu emulates CPU, does it emulates [pacifica|VT] extensions too? With a patch? Do you have a link to some docs? thanks Eurolines : Voyagez au meilleur prix : http://www.alinto.com/pub/
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
andrzej zaborowski wrote: On 20/01/2008, Alexander Graf <[EMAIL PROTECTED]> wrote: He was talking about running SVM code in KQemu/KVM. It might work with kqemu (I honestly have not tested it, but see no reason it shouldn't), but definitely not with KVM. Simply said, you can not run KVM inside of a KVM virtualized machine. What would be the problem with supporting that in KVM? The host SVM should just report that the guest is trying to execute an SVM insn and generate an Illegal Operation which would be handled by qemu. Regards right now kvm never call to qemu for cpu emulation, qemu is used just for the devices, if kvm have something that it need to emulate it have a small emulator inside the kernel, (ofcruse with modification what you just said is possible)
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
On 20/01/2008, Alexander Graf <[EMAIL PROTECTED]> wrote: > He was talking about running SVM code in KQemu/KVM. It might work with > kqemu (I honestly have not tested it, but see no reason it shouldn't), > but definitely not with KVM. Simply said, you can not run KVM inside > of a KVM virtualized machine. What would be the problem with supporting that in KVM? The host SVM should just report that the guest is trying to execute an SVM insn and generate an Illegal Operation which would be handled by qemu. Regards
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
Opps, me wrong this time, it should have been private. Didn't notice the reply address is different. Sorry. On Sun, 2008-01-20 at 21:21 +0200, Dor Laor wrote: > Alexey, you're wrong again. > > > svm is supported. > > On Sun, 2008-01-20 at 20:59 +0200, Alexey Eremenko wrote: > > Note however, that as far as I know, all the Qemu accelerators - KQemu > > and KVM do not support this. > > > > >
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
He was talking about running SVM code in KQemu/KVM. It might work with kqemu (I honestly have not tested it, but see no reason it shouldn't), but definitely not with KVM. Simply said, you can not run KVM inside of a KVM virtualized machine. Regards, Alex On Jan 20, 2008, at 8:21 PM, Dor Laor wrote: Alexey, you're wrong again. svm is supported. On Sun, 2008-01-20 at 20:59 +0200, Alexey Eremenko wrote: Note however, that as far as I know, all the Qemu accelerators - KQemu and KVM do not support this.
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
Alexey, you're wrong again. svm is supported. On Sun, 2008-01-20 at 20:59 +0200, Alexey Eremenko wrote: > Note however, that as far as I know, all the Qemu accelerators - KQemu > and KVM do not support this. >
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
Note however, that as far as I know, all the Qemu accelerators - KQemu and KVM do not support this. -- -Alexey Eremenko "Technologov"
Re: [Qemu-devel] emulate the Intel-VT behavior on any type of CPU
Hi, On Jan 20, 2008, at 7:29 PM, octane indice wrote: Hello I'm using qemu a lot for testing. I have to test some scenarios involving intel-VT machines. Can qemu emulates the intel-VT (or AMD pacifica) behavior on any type of machine? SVM (AMD pacifica) is party integrated. You don't have an IOMMU and high SVM exit codes don't work (mostly unused anyway), but apart from that it should be mostly feature-identical to what you get from a real K9 CPU. You are welcome to implement VMX as well ;-). Regards, Alex
[Qemu-devel] emulate the Intel-VT behavior on any type of CPU
Hello I'm using qemu a lot for testing. I have to test some scenarios involving intel-VT machines. Can qemu emulates the intel-VT (or AMD pacifica) behavior on any type of machine? Is it possible? Is it planned? Thank you Eurolines : Voyagez au meilleur prix : http://www.alinto.com/pub/
