Xen users - Feb 2009 - Loosing vmx flag with Lenny 2.6.26-1-xen-amd64 on Q9400

Hi.

Is there a solution for the "Disappearing-Intel-VT-support"-issue with
Debian-Lenny Xen-kernel-packages?
When I boot a regular Debian kernel, the vmx-flag shows up in 
/proc/cpuinfo, leading me to the conclusion that the BIOS is set up 
correctly. The flag is gone when I boot the Xen-kernel, meaning I don''t
have HVM support.
Does anybody have the same problem, or -even better- a solution?

Regards,
Markus


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On Mon, Feb 2, 2009 at 9:43 PM, Markus Kiefer <markus@scheiss.at>
wrote:
> When I boot a regular Debian kernel, the vmx-flag shows up in
/proc/cpuinfo,
> leading me to the conclusion that the BIOS is set up correctly. The flag is
> gone when I boot the Xen-kernel, meaning I don''t have HVM support.
Have you actually TRIED creating a HVM domU on that server?
I think the HVM (as well as some other) flag is hidden intentionally
on some versions of xen. Same thing happened on my RHEL 5 + Xen 3.3.1
while the flag still shows up on RHEL 5''s stock Xen. Both systems are
able to start HVM domU normally.

Regards,

Fajar

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Fajar A. Nugraha schrieb:
> Have you actually TRIED creating a HVM domU on that server?
> I think the HVM (as well as some other) flag is hidden intentionally
> on some versions of xen. Same thing happened on my RHEL 5 + Xen 3.3.1
> while the flag still shows up on RHEL 5''s stock Xen. Both systems
are
> able to start HVM domU normally.
I tried. And it didn''t work.
Creation stops immediately, with xm stating that my cpu doesn''t support
HVM. :-/

Regards,
Markus


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On Mon, Feb 2, 2009 at 10:23 PM, Markus Kiefer <markus@scheiss.at>
wrote:
>> I think the HVM (as well as some other) flag is hidden intentionally
>> on some versions of xen. Same thing happened on my RHEL 5 + Xen 3.3.1
>> while the flag still shows up on RHEL 5''s stock Xen. Both
systems are
>> able to start HVM domU normally.
>
> I tried. And it didn''t work.
> Creation stops immediately, with xm stating that my cpu doesn''t
support HVM.
> :-/
>
Did you check the BIOS? If I remembered correctly, the flag still
shows even when BIOS disabled it.

There is another looong way to check it :
- boot normal kernel
- install vmware or Virtualbox
- install 64bit guest

If it works, CPU supports HVM and enabled in BIOS. If it doesn''t,
something wrong with one of them.

Regards,

Fajar

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What "xm info" says?

2009/2/2 Markus Kiefer <markus@scheiss.at>
> Hi.
>
> Is there a solution for the "Disappearing-Intel-VT-support"-issue
with
> Debian-Lenny Xen-kernel-packages?
> When I boot a regular Debian kernel, the vmx-flag shows up in
> /proc/cpuinfo, leading me to the conclusion that the BIOS is set up
> correctly. The flag is gone when I boot the Xen-kernel, meaning I
don''t have
> HVM support.
> Does anybody have the same problem, or -even better- a solution?
>
> Regards,
> Markus
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>

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Hi.

Meanwhile I installed OpenSUSE 11.1, just to see if it really is a 
Debian-related problem. It isn''t. Still no vmx-flag. And Xen still 
refuses to set up a fully virtualized VM.


Thiago Camargo Martins Cordeiro schrieb:
> What "xm info" says?
Here''s the output of xm info


~ # xm info
host                   : linux-oumb
release                : 2.6.27.7-9-xen
version                : #1 SMP 2008-12-04 18:10:04 +0100
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2660
hw_caps                : 
bfebfbff:20000800:00000000:00000140:0408e3fd:00000000:00000001:00000000
virt_caps              :
total_memory           : 8058
free_memory            : 127
max_free_memory        : 7359
max_para_memory        : 7355
max_hvm_memory         : 7329
node_to_cpu            : node0:0-3
node_to_memory         : node0:127
xen_major              : 3
xen_minor              : 3
xen_extra              : .1_18494_03-1.8
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : 18494
cc_compiler            : gcc version 4.3.2 [gcc-4_3-branch revision 
141291] (SUSE Linux)
cc_compile_by          : abuild
cc_compile_domain      :
cc_compile_date        : Wed Dec  3 17:40:21 UTC 2008
xend_config_format     : 4


Best regards,
Markus


> 
> 2009/2/2 Markus Kiefer <markus@scheiss.at>
> 
>> Hi.
>>
>> Is there a solution for the
"Disappearing-Intel-VT-support"-issue with
>> Debian-Lenny Xen-kernel-packages?
>> When I boot a regular Debian kernel, the vmx-flag shows up in
>> /proc/cpuinfo, leading me to the conclusion that the BIOS is set up
>> correctly. The flag is gone when I boot the Xen-kernel, meaning I
don''t have
>> HVM support.
>> Does anybody have the same problem, or -even better- a solution?
>>
>> Regards,
>> Markus
>>
>>
>> _______________________________________________
>> Xen-users mailing list
>> Xen-users@lists.xensource.com
>> http://lists.xensource.com/xen-users
>>
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users

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On Tue, Feb 3, 2009 at 3:32 PM, Markus Kiefer <markus@scheiss.at>
wrote:
> Here''s the output of xm info
> hw_caps                :
It should be like this
virt_caps              : hvm

Here''s /proc/cpuinfo on my system. vmx flag does not show when on
xen-kernel
flags		: fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush acpi
mmx fxsr sse sse2 ss ht syscall lm constant_tsc pni est cx16 lahf_lm

Again, have you check the BIOS? I suspect that is your problem.

Regards,

Fajar

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Hi.

Fajar A. Nugraha schrieb:
> On Mon, Feb 2, 2009 at 10:23 PM, Markus Kiefer <markus@scheiss.at>
wrote:
>>> I think the HVM (as well as some other) flag is hidden
intentionally
>>> on some versions of xen. Same thing happened on my RHEL 5 + Xen
3.3.1
>>> while the flag still shows up on RHEL 5''s stock Xen. Both
systems are
>>> able to start HVM domU normally.
>> I tried. And it didn''t work.
>> Creation stops immediately, with xm stating that my cpu
doesn''t support HVM.
>> :-/
>>
> 
> Did you check the BIOS? If I remembered correctly, the flag still
> shows even when BIOS disabled it.
I just checked again:
Virtualization is enabled,
VT for direct I/O is enabled,
Should I enable Trusted execution?
As far as I can tell from Intel''s website, there is no version of the 
Q9400 that doesn''t support VT. By the way, the machine is a Dell 
Optiplex 755MT.

> There is another looong way to check it :
> - boot normal kernel
> - install vmware or Virtualbox
> - install 64bit guest
> 
> If it works, CPU supports HVM and enabled in BIOS. If it doesn''t,
> something wrong with one of them.
Sigh. I''ll try that.

Regards,
Markus


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Hi.

Problem solved. Sorry for asking.
Had to disable "VT for direct I/O" in the BIOS.
HVM works fine now. (/proc/cpuinfo still doesn''t show a vmx flag, 
though, so SUSE must use one of the setups where it''s hidden.).

Regards,
Markus




Markus Kiefer schrieb:
> Hi.
> 
> Fajar A. Nugraha schrieb:
>> On Mon, Feb 2, 2009 at 10:23 PM, Markus Kiefer
<markus@scheiss.at> wrote:
>>>> I think the HVM (as well as some other) flag is hidden
intentionally
>>>> on some versions of xen. Same thing happened on my RHEL 5 + Xen
3.3.1
>>>> while the flag still shows up on RHEL 5''s stock Xen.
Both systems are
>>>> able to start HVM domU normally.
>>> I tried. And it didn''t work.
>>> Creation stops immediately, with xm stating that my cpu
doesn''t
>>> support HVM.
>>> :-/
>>>
>>
>> Did you check the BIOS? If I remembered correctly, the flag still
>> shows even when BIOS disabled it.
> 
> I just checked again:
> Virtualization is enabled,
> VT for direct I/O is enabled,
> Should I enable Trusted execution?
> As far as I can tell from Intel''s website, there is no version of
the
> Q9400 that doesn''t support VT. By the way, the machine is a Dell 
> Optiplex 755MT.
> 
> 
>> There is another looong way to check it :
>> - boot normal kernel
>> - install vmware or Virtualbox
>> - install 64bit guest
>>
>> If it works, CPU supports HVM and enabled in BIOS. If it
doesn''t,
>> something wrong with one of them.
> 
> Sigh. I''ll try that.
> 
> Regards,
> Markus

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Fajar A. Nugraha schrieb:
> On Tue, Feb 3, 2009 at 3:32 PM, Markus Kiefer <markus@scheiss.at>
wrote:
>> Here''s the output of xm info
>> hw_caps                :
> 
> It should be like this
> virt_caps              : hvm
> 
> Here''s /proc/cpuinfo on my system. vmx flag does not show when on
xen-kernel
> flags		: fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush acpi
> mmx fxsr sse sse2 ss ht syscall lm constant_tsc pni est cx16 lahf_lm
> 
> Again, have you check the BIOS? I suspect that is your problem.
> 
> Regards,
> 
> Fajar
You''re right. Virtualization was enabled. But I also had to disable
"VT
for direct I/O", which was enabled before. It''s working now.
Thanks for your advice and time.

Regards,
Markus


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Markus Kiefer wrote:
> Fajar A. Nugraha schrieb:
>> On Tue, Feb 3, 2009 at 3:32 PM, Markus Kiefer <markus@scheiss.at>
wrote:
>>> Here''s the output of xm info
>>> hw_caps                :
>>
>> It should be like this
>> virt_caps              : hvm
>>
>> Here''s /proc/cpuinfo on my system. vmx flag does not show when
on
>> xen-kernel
>> flags        : fpu de tsc msr pae cx8 apic sep mtrr cmov pat clflush 
>> acpi
>> mmx fxsr sse sse2 ss ht syscall lm constant_tsc pni est cx16 lahf_lm
>>
>> Again, have you check the BIOS? I suspect that is your problem.
>>
>> Regards,
>>
>> Fajar
>
> You''re right. Virtualization was enabled. But I also had to
disable
> "VT for direct I/O", which was enabled before. It''s
working now.
> Thanks for your advice and time.
>
> Regards,
> Markus
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
fyi, i''ve never had VMX show up in /proc/cpuinfo when booted into a xen
kernel, only in xm dmesg:

(XEN) Detected 1866.780 MHz processor.
(XEN) HVM: VMX enabled
(XEN) CPU0: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 1/4 eip 8c000
(XEN) CPU1: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 2/2 eip 8c000
(XEN) CPU2: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 3/6 eip 8c000
(XEN) CPU3: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 4/1 eip 8c000
(XEN) CPU4: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 5/5 eip 8c000
(XEN) CPU5: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 6/3 eip 8c000
(XEN) CPU6: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Booting processor 7/7 eip 8c000
(XEN) CPU7: Intel(R) Xeon(R) CPU           E5320  @ 1.86GHz stepping 07
(XEN) Total of 8 processors activated.

- jonathan

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