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dom0_mem
2006 Oct 06
3
Writing MSRs from Domain0
...fails to switch frequencies. A closer look on the
powernow-k8 source reveals, that some MSR write operations seem to be
without any effect. A rdmsr() before and after the wrmsr() call reveals
that no real change on the register ocurrs.
An older PowerNow patch from this list emulates MSR writes by DOM0_MSR
hypercalls, but this call seems to be abandoned some time ago. Other
routines in the kernel simply employ the rdmsr()/wrmsr() macros from the
Linux kernel, as the current PowerNow drivers does. Whats the correct
Xen-like way to maniputate a MSR from a Domain0?
Regards,
Holger
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