Pallipadi, Venkatesh wrote:
After a fair bit of Googling and reading around, I'm none the wiser
about exactly how Linux 2.6.x sets the processor VID (or for
that matter
how it decides the FID settings) when using the ondemand governor and
cpufreq stuff.
Can anyone tell me a) whether this is obtained from the BIOS,
something
in the MSR of the processor or elsewhere and
Yes. The freq and voltage supported comes from the platform BIOS. BIOS
exports this in an ACPI table which is handled by acpi-cpufreq driver in
Linux kernel.
OK, thanks for that.
b) whether there is an
interface in /proc or /sys where one can find out what is set
and modify it?
There is no way of modifying and using new VIDs etc in Linux kernel
(other than exporting your own DSDT and hacking the related code).
Is there a way of viewing the ACPI table contents relating to the VIDs
and FIDs?
--
Brian Morrison
[EMAIL PROTECTED]
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