32 bit HVM guests

32 bit HVM guests

[Ky Srinivasan]

When we host 32 bit hvm guests on a 64 bit hypervisor, do we currently support loading 32 bit PV drivers in the HVM guest?

Regards,

K. Y

RE: 32 bit HVM guests

[Li, Xin B]

>-----Original Message-----
>From: xen-devel-bounces@lists.xensource.com 
>[mailto:xen-devel-bounces@lists.xensource.com] On Behalf Of Ky 
>Srinivasan
>Sent: Thursday, April 12, 2007 10:18 PM
>To: xen-devel@lists.xensource.com
>Subject: [Xen-devel] 32 bit HVM guests
>
>When we host 32 bit hvm guests on a 64 bit hypervisor, do we 
>currently support loading 32 bit PV drivers in the HVM guest?
>

Yes!
-Xin 


>Regards,
>
>K. Y
>
>
>
>_______________________________________________
>Xen-devel mailing list
>Xen-devel@lists.xensource.com
>http://lists.xensource.com/xen-devel
>

RE: 32 bit HVM guests

[Ky Srinivasan]

>>> On Thu, Apr 12, 2007 at 10:32 AM, in message
<B30DA1341B0CFA4893EF8A36B40B5C5D01044125@pdsmsx411.ccr.corp.intel.com>, "Li,
Xin B" <xin.b.li@intel.com> wrote: 
>> ----- Original Message-----
>>From: xen- devel- bounces@lists.xensource.com 
>>[mailto:xen- devel- bounces@lists.xensource.com] On Behalf Of Ky 
>>Srinivasan
>>Sent: Thursday, April 12, 2007 10:18 PM
>>To: xen- devel@lists.xensource.com
>>Subject: [Xen- devel] 32 bit HVM guests
>>
>>When we host 32 bit hvm guests on a 64 bit hypervisor, do we 
>>currently support loading 32 bit PV drivers in the HVM guest?
>>
> 
> Yes!
> - Xin 

Great! Should the PV drivers be built differently since the width of the physical address in the hypervisor and dom0 is different from what the hvm guest is compiled for? I trying to test this combination and I have hang in the xenbus driver.

K. Y

Re: 32 bit HVM guests

[TAIRA Hajime]

Hi.

> Great! Should the PV drivers be built differently since the width  
> of the physical address
> in the hypervisor and dom0 is different from what the hvm guest is  
> compiled for? I trying
> to test this combination and I have hang in the xenbus driver.

Me too. I am running HVM Domain on xen-3.0.4.
In HVM Domain, I executed "modprobe xenbus" command. When it hanged.

And I tried the PV Driver in xen-unstable. xenbus.ko was removed in  
xen-unstable.
I executed "modprobe xen-platform-pci" command. When it hanged too.

I checked "xm dmesg" in the Dom0.
May be it was mismatched hypercall:20 in xen-3.0.4 and xen-unstable.

Now I am trying xen-unstable's PV drivers on xen-unstable.

.::.:... .::....: .::...:: .::.:.:: .::..:.: .:::..:.
TAIRA Hajime <htaira-fdr@pantora.net>
              web: http://pantora.net/


On 2007/04/12, at 23:43, Ky Srinivasan wrote:

>
>
>>>> On Thu, Apr 12, 2007 at 10:32 AM, in message
> <B30DA1341B0CFA4893EF8A36B40B5C5D01044125@pdsmsx411.ccr.corp.intel.com 
> >, "Li,
> Xin B" <xin.b.li@intel.com> wrote:
>>> ----- Original Message-----
>>> From: xen- devel- bounces@lists.xensource.com
>>> [mailto:xen- devel- bounces@lists.xensource.com] On Behalf Of Ky
>>> Srinivasan
>>> Sent: Thursday, April 12, 2007 10:18 PM
>>> To: xen- devel@lists.xensource.com
>>> Subject: [Xen- devel] 32 bit HVM guests
>>>
>>> When we host 32 bit hvm guests on a 64 bit hypervisor, do we
>>> currently support loading 32 bit PV drivers in the HVM guest?
>>>
>>
>> Yes!
>> - Xin
>
> Great! Should the PV drivers be built differently since the width  
> of the physical address in the hypervisor and dom0 is different  
> from what the hvm guest is compiled for? I trying to test this  
> combination and I have hang in the xenbus driver.
>
> K. Y
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>
>

RE: 32 bit HVM guests

[Ky Srinivasan]

>>> On Thu, Apr 12, 2007 at 10:32 AM, in message
<B30DA1341B0CFA4893EF8A36B40B5C5D01044125@pdsmsx411.ccr.corp.intel.com>, "Li,
Xin B" <xin.b.li@intel.com> wrote: 
>> ----- Original Message-----
>>From: xen- devel- bounces@lists.xensource.com 
>>[mailto:xen- devel- bounces@lists.xensource.com] On Behalf Of Ky 
>>Srinivasan
>>Sent: Thursday, April 12, 2007 10:18 PM
>>To: xen- devel@lists.xensource.com
>>Subject: [Xen- devel] 32 bit HVM guests
>>
>>When we host 32 bit hvm guests on a 64 bit hypervisor, do we 
>>currently support loading 32 bit PV drivers in the HVM guest?
>>
> 
> Yes!
> - Xin 

Great! Should the PV drivers be built differently since the width of the physical address in the hypervisor and dom0 is different from what the hvm guest is compiled for? I trying to test this combination and I have hang in the xenbus driver.

K. Y

RE: 32 bit HVM guests

[Li, Xin B]

>
>Great! Should the PV drivers be built differently since the 
>width of the physical address in the hypervisor and dom0 is 
>different from what the hvm guest is compiled for? 

No, and such kind of things are transparent to the guest.
-Xin 

>K. Y
>

Re: 32 bit HVM guests

[Keir Fraser]

On 12/4/07 15:32, "Li, Xin B" <xin.b.li@intel.com> wrote:

>> When we host 32 bit hvm guests on a 64 bit hypervisor, do we
>> currently support loading 32 bit PV drivers in the HVM guest?
>> 
> 
> Yes!

More accurately, 'almost'. I think everything should work except the balloon
driver. The memory_op hypercall is not fully supported enough yet for 32-bit
HVM guest on 64-bit hypervisor.

 -- Keir