Re: [Minios-devel] Some queries regarding Unikraft on x86/arm

[Ajay Garg <ajaygargnsit@xxxxxxxxx>]

Thanks Wei for the crisp reply !!

Waiting for Simon's insights on Unikraft-x86 on Xen :)

Thanks and Regards,

Ajay

On Wed, Apr 4, 2018 at 8:04 AM, Wei Chen <Wei.Chen@xxxxxxx> wrote:

Hi Ajay,

 

>  a) Unikraft (for arm32) is built using HVM mode, and will _only_ work with processors that have hardware-virtualization enabled, right?

 

Yes, that’s right. Currently, for arm32-unikraft, we plan to support Xen and Linux/KVM.

Both of them need hardware virtualization enabled processors.

 

> b) Unikraft (for x86) also uses HVM mode, and works _only_ with processors that have hardware-virtualization enabled, right?

> Or Unikraft works/can-work using PV mode?

 

Unikraft-x86 of KVM platform uses HVM mode, it should require hardware virtualization

enabled processors. But it seems the Unikraft-x86 of Xen platform is using PV-mode.

I am not sure about it, but I think Simon could give you a clear answer.

 

Regards,

Wei Chen

 

From: Minios-devel <minios-devel-bounces@lists.xenproject.org> On Behalf Of Ajay Garg
Sent: 2018年4月3日 19:17
To: minios-devel@lists.xenproject.org
Subject: [Minios-devel] Some queries regarding Unikraft on x86/arm

 

Hi All.

It's pretty clear that PV-guests on ARM are not the way to go (neither there are any plans for support of PV-guests on ARM), primarily because of the following reasons :

       * Too much complexity in OS code while booting up, and in general.

       * Security issues (Meltdown).

So, rumprun, as of now is unusable for ARM, because rumprun is built with PV-guests in mind.

So, that leaves us with Unikraft.
So, kindly confirm :

 

a)

Unikraft (for arm32) is built using HVM mode, and will _only_ work with processors that have hardware-virtualization enabled, right?

b)

Unikraft (for x86) also uses HVM mode, and works _only_ with processors that have hardware-virtualization enabled, right?

Or Unikraft works/can-work using PV mode?

I think with the above two resolutions, we can be sure to zero-in on Unikraft for running unikernels.

Many thanks to everyone who have helped, big thanks to Julien (<julien.grall@xxxxxxx>) !!

 

Thanks and Regards,
Ajay

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Regards,
Ajay

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