ARM hypervisors

ARM hypervisors

[RR NN]

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Hello
ARM hypervisors (pKVM, Gunyah) can run x86 OSs?

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Re: ARM hypervisors

[Peter Maydell]

On Tue, 5 Mar 2024 at 13:40, RR NN <rnn59437@gmail.com> wrote:
>
> Hello
> ARM hypervisors (pKVM, Gunyah) can run x86 OSs?

No. A hypervisor uses the host CPU's virtualization extensions
to allow the guest code to run directly on the host CPU. This
is why they're fast. This also means that they only work when
the guest CPU is the same architecture as the host CPU.
So you can run an x86 OS on an x86 host CPU, or an Arm
OS on an Arm host CPU using a hypervisor, but you can't run
a guest of the "wrong" architecture.

thanks
-- PMM

Re: ARM hypervisors

[RR NN]

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Awesome, thanks for the info!

On Tue, Mar 5, 2024, 17:29 Peter Maydell <peter.maydell@linaro.org> wrote:

> On Tue, 5 Mar 2024 at 13:40, RR NN <rnn59437@gmail.com> wrote:
> >
> > Hello
> > ARM hypervisors (pKVM, Gunyah) can run x86 OSs?
>
> No. A hypervisor uses the host CPU's virtualization extensions
> to allow the guest code to run directly on the host CPU. This
> is why they're fast. This also means that they only work when
> the guest CPU is the same architecture as the host CPU.
> So you can run an x86 OS on an x86 host CPU, or an Arm
> OS on an Arm host CPU using a hypervisor, but you can't run
> a guest of the "wrong" architecture.
>
> thanks
> -- PMM
>

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Re: ARM hypervisors

[RR NN]

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💖

RR reacted via Gmail
<https://www.google.com/gmail/about/?utm_source=gmail-in-product&utm_medium=et&utm_campaign=emojireactionemail#app>

On Tue, Mar 5, 2024, 22:44 RR NN <rnn59437@gmail.com> wrote:

> Awesome, thanks for the info!
>
> On Tue, Mar 5, 2024, 17:29 Peter Maydell <peter.maydell@linaro.org> wrote:
>
>> On Tue, 5 Mar 2024 at 13:40, RR NN <rnn59437@gmail.com> wrote:
>> >
>> > Hello
>> > ARM hypervisors (pKVM, Gunyah) can run x86 OSs?
>>
>> No. A hypervisor uses the host CPU's virtualization extensions
>> to allow the guest code to run directly on the host CPU. This
>> is why they're fast. This also means that they only work when
>> the guest CPU is the same architecture as the host CPU.
>> So you can run an x86 OS on an x86 host CPU, or an Arm
>> OS on an Arm host CPU using a hypervisor, but you can't run
>> a guest of the "wrong" architecture.
>>
>> thanks
>> -- PMM
>>
>

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Re: ARM hypervisors

[Trilok Soni]

On 3/5/2024 5:59 AM, Peter Maydell wrote:
> On Tue, 5 Mar 2024 at 13:40, RR NN <rnn59437@gmail.com> wrote:
>>
>> Hello
>> ARM hypervisors (pKVM, Gunyah) can run x86 OSs?
> 
> No. A hypervisor uses the host CPU's virtualization extensions
> to allow the guest code to run directly on the host CPU. This
> is why they're fast. This also means that they only work when
> the guest CPU is the same architecture as the host CPU.
> So you can run an x86 OS on an x86 host CPU, or an Arm
> OS on an Arm host CPU using a hypervisor, but you can't run
> a guest of the "wrong" architecture.

As explained above you can't run x86 Guest OS w/ above Hypervisors.

You can use the qemu/crosvm w/ above Hypervisors to do the ARM64
guest OS. You may be able to use Pixel device as well w/ the pKVM. 

I also suggest that you don't do the "reactions" with gmail. It 
doesn't help this conversation. 

Let us know what exactly you would like to experiment with above
Hypervisors. 

-- 
---Trilok Soni