Re: help? need to enable VT-d for 2.6.27

Chris Friesen
2011-08-30T23:03:22Z

On 08/30/2011 01:59 PM, Jan Kiszka wrote:
> On 2011-08-30 21:39, Chris Friesen wrote:

>> 2) If I create such a link, it builds a few files, and then gives the
>> following:
>>
>> /home/cfriesen/Download/kvm-kmod-3.0b/x86/x86.c: In function
>> ‘vcpu_enter_guest’:
>> /home/cfriesen/Download/kvm-kmod-3.0b/x86/x86.c:5539:26: error:
>> ‘prof_on’ undeclared (first use in this function)
>> /home/cfriesen/Download/kvm-kmod-3.0b/x86/x86.c:5539:26: note: each
>> undeclared identifier is reported only once for each function it appears in
>>
>>
>> This appears to be due to the fact that KVM_PROFILING is defined
>> unconditionally in my kernel, but "prof_on" is only defined if
>> CONFIG_PROFILING is enabled. Commenting out that chunk of code in x86.c
>> lets everything build.
>
> If CONFIG_PROFILING is off, prof_on is defined to 0. But we may miss
> some include on older kernels. Does adding linux/profile.h to x86.c
> solve the issue as well?

It would appear that I got the explanation wrong. CONFIG_PROFILING is
enabled on my kernel. The problem is that our OS vendor has included a
patch to convert prof_on to immediate values, which requires a change in
x86.c.

Never mind, nothing to see here.

Chris

--
Chris Friesen
Software Developer
GENBAND
chris.friesen@genband.com