Xen devel - Oct 2007 - How to compile a module for dom0 or domU kernel?

Hi,

I am trying to create a new module for a domU kernel (which FYI, includes
the xen/xenbus.h header file), but I''m unable to figure out how to
compile
it. What should be the command and the Makefile for compiling the module? I
tried compiling it like a linux kernel module, but I guess I didn''t
give the
correct path. None of the paths I tried with -C worked.

Regards,
Ashutosh


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Hi,
>I am trying to create a new module for a domU kernel (which FYI, includes
>the xen/xenbus.h header file), but I''m unable to figure out how to
compile
>it. What should be the command and the Makefile for compiling the module? I
>tried compiling it like a linux kernel module, but I guess I didn''t
give the
>correct path. None of the paths I tried with -C worked.
Did you use different vmlinuxs between dom0 and domU?
If using the same vmlinux, you can compile it on dom0 with the same way as
linux.
For example, like the below.
"make -C /lib/modules/`uname -r`/build M=`pwd` V=1 modules"

If no, I think you should be able to use like the below.
"make -C /home/hoge/xen-unstable.hg/build-linux-2.6.18-xenU_ia64 M=`pwd`
V=1
modules"

Best Regards,

Akio Takebe


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Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Is there a method which i can use to compile a raid card driver inside the
dom0 kernel ? I have been trying to get centos5 bundled xen working on a
quad core dual xeon 1.86 where the hard drivers are running raid 1 on a
hardware raid card (areca). To be able to boot up, i need to compile the
areca drivers inside the kernel. When i go to /usr/src/kernel source, and
try to issue a make oldconfig, it works, however next make command gives
errors.

Any ideas on how it can be resolved ?

On 10/31/07, Akio Takebe <takebe_akio@jp.fujitsu.com>
wrote:
>
> Hi,
>
> >I am trying to create a new module for a domU kernel (which FYI,
includes
> >the xen/xenbus.h header file), but I''m unable to figure out
how to
> compile
> >it. What should be the command and the Makefile for compiling the
module?
> I
> >tried compiling it like a linux kernel module, but I guess I
didn''t give
> the
> >correct path. None of the paths I tried with -C worked.
> Did you use different vmlinuxs between dom0 and domU?
> If using the same vmlinux, you can compile it on dom0 with the same way as
> linux.
> For example, like the below.
> "make -C /lib/modules/`uname -r`/build M=`pwd` V=1 modules"
>
> If no, I think you should be able to use like the below.
> "make -C /home/hoge/xen-unstable.hg/build-linux-2.6.18-xenU_ia64
M=`pwd`
> V=1
> modules"
>
> Best Regards,
>
> Akio Takebe
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>


-- 
regards,

Anand Gupta


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http://lists.xensource.com/xen-devel

Hi,
>Is there a method which i can use to compile a raid card driver inside the
>dom0 kernel ? I have been trying to get centos5 bundled xen working on a
>quad core dual xeon 1.86 where the hard drivers are running raid 1 on a
>hardware raid card (areca). To be able to boot up, i need to compile the
>areca drivers inside the kernel. When i go to /usr/src/kernel source, and
>try to issue a make oldconfig, it works, however next make command gives
>errors.
>
>Any ideas on how it can be resolved ?
The method of compiling a module for dom0 is the same as linux.
I think there is not any special method.

Best Regards,

Akio Takebe


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

On 10/31/07, Akio Takebe <takebe_akio@jp.fujitsu.com>
wrote:
>
> The method of compiling a module for dom0 is the same as linux.
> I think there is not any special method.
>
When i try to issue a make command inside the kernel-xen source, it gives me
error :( I had posted the error in another thread, let me try to get it out.

-- 
regards,

Anand Gupta


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Hi,
>On 10/31/07, Akio Takebe <takebe_akio@jp.fujitsu.com> wrote:
>>
>> The method of compiling a module for dom0 is the same as linux.
>> I think there is not any special method.
>>
>
>When i try to issue a make command inside the kernel-xen source, it gives me
>error :( I had posted the error in another thread, let me try to get it out.
>
I have never used centos.
But I think kernel-xen-devel you used don''t include kernel sources.
When you used kernel-devel, can you compile it?
It also don''t include sources, I think.

Best Regards,

Akio Takebe


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http://lists.xensource.com/xen-devel

As far as i can recall i was able to see the entire kernel source tree in
/usr/src

when i issued a make command, it was giving me error, still searching for
the error (since i don''t use the centos5 xen package, i need to dig out
the
old mail, however if it still works, i would use the centos5 packages, as i
then don''t need to bother about updates etc)

On 10/31/07, Akio Takebe <takebe_akio@jp.fujitsu.com>
wrote:
>
> Hi,
>
> >On 10/31/07, Akio Takebe <takebe_akio@jp.fujitsu.com> wrote:
> >>
> >> The method of compiling a module for dom0 is the same as linux.
> >> I think there is not any special method.
> >>
> >
> >When i try to issue a make command inside the kernel-xen source, it
gives
> me
> >error :( I had posted the error in another thread, let me try to get it
> out.
> >
> I have never used centos.
> But I think kernel-xen-devel you used don''t include kernel
sources.
> When you used kernel-devel, can you compile it?
> It also don''t include sources, I think.
>
> Best Regards,
>
> Akio Takebe
>
>

-- 
regards,

Anand Gupta


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Hi Akio,

I was trying the same command as the second one you mentioned. But I had
moved the xen-3.1.0-src directory after compiling xen to some other folder.
On specifying the new path, make was still trying to access files in the old
path. Creating a symlink to the new path fixed the problem :)

But I''m not able to load the module, dmesg gives an error: Unknown
symbol
xenbus_write(). I have included xen/xenbus.h, do I need to do anything in
addition to that?

Regards,
Ashutosh


On 10/31/07, Akio Takebe <takebe_akio@jp.fujitsu.com>
wrote:
>
> Hi,
>
> >I am trying to create a new module for a domU kernel (which FYI,
includes
> >the xen/xenbus.h header file), but I''m unable to figure out
how to
> compile
> >it. What should be the command and the Makefile for compiling the
module?
> I
> >tried compiling it like a linux kernel module, but I guess I
didn''t give
> the
> >correct path. None of the paths I tried with -C worked.
> Did you use different vmlinuxs between dom0 and domU?
> If using the same vmlinux, you can compile it on dom0 with the same way as
> linux.
> For example, like the below.
> "make -C /lib/modules/`uname -r`/build M=`pwd` V=1 modules"
>
> If no, I think you should be able to use like the below.
> "make -C /home/hoge/xen-unstable.hg/build-linux-2.6.18-xenU_ia64
M=`pwd`
> V=1
> modules"
>
> Best Regards,
>
> Akio Takebe
>
>

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