Re: [Qemu-devel] [PATCH 4/4] tpm: Provide libtpms software TPM backend

[Corey Bryant <coreyb@linux.vnet.ibm.com>]

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On 12/01/2013 11:00 PM, Xu, Quan wrote:
>
>
>> -----Original Message-----
>> From: Corey Bryant [mailto:coreyb@linux.vnet.ibm.com]
>> Sent: Tuesday, November 26, 2013 10:40 PM
>> To: Xu, Quan
>> Cc: qemu-devel@nongnu.org
>> Subject: Re: [Qemu-devel] [PATCH 4/4] tpm: Provide libtpms software TPM
>> backend
>>
>>
>> On 11/25/2013 10:04 PM, Xu, Quan wrote:
>>>        Thanks Bryant, this problem has been solved by following
>> "http://www.mail-archive.com/qemu-devel@nongnu.org/msg200808.html".
>>>        But there is another problem when run configure with
>>> "./configure --target-list=x86_64-softmmu --enable-tpm". The value of
>>> "libtpms" is still "no". when I modified "tpm_libtpms" to "yes" in
>>> configure file directly and make, then reported with error
>>> "hw/tpm/tpm_libtpms.c:21:33: fatal error: libtpms/tpm_library.h: No
>>> such file or directory".  Now I am installing libtpms with
>> https://github.com/coreycb/libtpms for libtpms lib. Could you share specific step
>> to configure QEMU based on your patch, if it comes easily to you?
>>
>> Here's what I've been using to build libtpms:
>>
>> $ CFLAGS='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions
>> -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic'
>> $ export CFLAGS
>> $ ./configure --build=x86_64-redhat-linux-gnu --prefix=/usr
>> --libdir=/usr/lib64
>> $ make
>> $ sudo make install
>>
>> And then the configure you're using above should work for QEMU.
>
>
>
>      Sorry for my delay to answer you. I had a cold and took a sick leave at last Friday.

Not a problem.  I hope you're feeling better.

>
>      Now I have setup QEMU with your patch. Start VM with below command:
> ==
>     qemu-system-x86_64 -m 1024 -hda rhel.raw -nographic -vnc :1 -drive file=nvram.qcow2,if=none,id=nvram0-0-0,format=qcow2 -device tpm-tis,tpmdev=tpm-tpm0,id=tpm0 -tpmdev libtpms,id=tpm-tpm0,nvram=nvram0-0-0 -net nic -net tap,ifname=tap0,script=no
> ==
>
> rhel.raw is Red Hat 6.4 image. Also I have rebuild kernel with TPM 1.2 driver in VM. But I still can't find " /sys/class/misc/tpm0/ ".
>
>      Does it need SeaBios bios.bin to make it work?  If need bios.bin, could you send me a bios.bin and tell me how to enable bios.bin with your patch?

Yes it needs bios.bin.  I've attached a bios.bin that has vTPM seabios 
updates.  You should be able to copy everything from 
/usr/local/share/qemu to a new directory, and just replace the bios.bin 
in the new directory with the one I've attached.  Then point qemu at the 
new directory.

Also, make sure you enable the boot menu.  Then when you boot your guest 
you can press F11 to get a menu of TPM options to enable, disable, 
activate, deactivate, clear, etc the vTPM.

Here's some sample libvirt domain XML updates:

<domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
...
<os>
   <bootmenu enable='yes'/>
</os>
...
   <qemu:commandline>
     <qemu:arg value='-drive'/>
     <qemu:arg 
value='file=/home/corey/images/nvram.raw,if=none,id=drive-nvram0-0-0,format=raw'/>
     <qemu:arg value='-tpmdev'/>
     <qemu:arg value='libtpms,id=tpm-tpm0,nvram=drive-nvram0-0-0'/>
     <qemu:arg value='-device'/>
     <qemu:arg value='tpm-tis,tpmdev=tpm-tpm0,id=tpm0'/>
     <qemu:arg value='-L'/>
     <qemu:arg value='/usr/local/share/qemu/corey_seabios/'/>
   </qemu:commandline>
...

>
> BTW, I found a SeaBios patch:( Add TPM support to SeaBIOS) http://www.seabios.org/pipermail/seabios/2011-April/001609.html.
>
>
>

Stefan, do you know if this is the same code that was used to build our 
bios.bin?

-- 
Regards,
Corey Bryant

>>
>>>        BTW, one target of my team is enabling stubdom vtpm for HVM virtual
>> machine on Xen virtualization, your patches and seabios are big breakthroughs.
>> My team is very interested to collaborate with you / Qemu community on similar
>> areas.
>>
>> That's great to hear!
>>
>> Unfortunately, the current approach of linking QEMU against libtpms doesn't look
>> like it's going to make it upstream.  So it looks like we need to take a different
>> approach.
>
>
>
> My team is very interested to collaborate to make it upstream. Let's do it together.
>
>
>>
>> Btw, I thought Xen already had TPM support.  Is that not supported in
>> stubdom's?
>
>
>
> In Xen 4.3, Xen supports vtpm in stubdom for para-virtualization virtual machine only.
> My team is focusing on enabling stubdom vtpm for HVM virtual machine.
>
>
>
>>
>> --
>> Regards,
>> Corey Bryant
>>
>>>
>>> I'd be really pleased if you can help me on these issues.
>>>
>>> Quan Xu
>>> Intel
>>>
>>>
>>>> -----Original Message-----
>>>> From: Corey Bryant [mailto:coreyb@linux.vnet.ibm.com]
>>>> Sent: Monday, November 25, 2013 9:53 PM
>>>> To: Xu, Quan
>>>> Cc: qemu-devel@nongnu.org
>>>> Subject: Re: [Qemu-devel] [PATCH 4/4] tpm: Provide libtpms software
>>>> TPM backend
>>>>
>>>>
>>>>
>>>> On 11/24/2013 10:36 PM, Xu, Quan wrote:
>>>>> Bryant,
>>>>>
>>>>>         I found that there is some conflict in qemu-options.hx
>>>>> between your
>>>> patch andqemu-1.7.0-rc1.tar.bz2
>>>> <http://wiki.qemu-project.org/download/qemu-1.7.0-rc1.tar.bz2>.
>>>>>
>>>>> What QEMU version does this patch base on? Thanks.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Quan Xu
>>>>>
>>>>> Intel
>>>>>
>>>>>
>>>>>
>>>>
>>>> Thanks Quan.  I believe I built these on top of commit
>>>> c2d30667760e3d7b81290d801e567d4f758825ca.  I don't think this series
>>>> is going to make it upstream though so I likely won't be submitting a v2.
>>>>
>>>> --
>>>> Regards,
>>>> Corey Bryant
>>>
>>>
>
> Quan Xu
> Intel
>
>
>
>


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