Re: cpufreq not working as module on i386/amd64

On Sat Jan 29 11, Jia-Shiun Li wrote:
Hi all,

I found that cpufreq driver failed to attach when compiled as module
and loaded, but it works fine when compiled into kernel. I am
wondering if this is due to some kind of limitation, or can be fixed?

that's rather odd. for me neither the module nor the kernel code works, since
my cpu isn't supported by sys/x86/cpufreq/est.c. actually only pentium mobile
cpus seem to be supported.

maybe you can add some printf's to est.c:est_get_info() to identify at which
point error gets set. also you might want to make

"est: cpu_vendor %s, msr %0jx\n", cpu_vendor, msr);

non-conditional. maybe the output differy in kernel/module mode.

cheers.
alex


Tested on a Pentium E5200 desktop (i386) and a Pentium T4200 laptop
(amd64). Both got the same result. dmesg of T4200 attached.

kldload module:
----->8----->8----->8-----
est0: <Enhanced SpeedStep Frequency Control> on cpu0
est: CPU supports Enhanced Speedstep, but is not recognized.
est: cpu_vendor GenuineIntel, msr 6194c1a06004c1a
device_attach: est0 attach returned 6
est1: <Enhanced SpeedStep Frequency Control> on cpu1
est: CPU supports Enhanced Speedstep, but is not recognized.
est: cpu_vendor GenuineIntel, msr 6194c1a06004c1a
-----8<-----8<-----8<-----
(repeated 6 times, kldload retries?)

compiled into kernel:
----->8----->8----->8-----
...
fdc0 failed to probe at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
uart1: <ns8250> failed to probe at port 0x2f8-0x2ff irq 3 on isa0
isa_probe_children: probing PnP devices
coretemp0: <CPU On-Die Thermal Sensors> on cpu0
coretemp0: Setting TjMax=104
p4tcc0: <CPU Frequency Thermal Control> on cpu0
est0: <Enhanced SpeedStep Frequency Control> on cpu0
coretemp1: <CPU On-Die Thermal Sensors> on cpu1
coretemp1: Setting TjMax=104
p4tcc1: <CPU Frequency Thermal Control> on cpu1
est1: <Enhanced SpeedStep Frequency Control> on cpu1
Device configuration finished.
procfs registered
...
-----8<-----8<-----8<-----

Jia-Shiun.


--
a13x
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