Dave Jones wrote:
Exposing the guts of the msr driver like that doesn't seem too clean.
For in-kernel use, why not just add something like this..
(note:not even compile tested)..
Well, that *is* the guts of the MSR driver.
void rdmsr_on_cpu(unsigned int cpu, unsigned long msr, unsigned long *lo,
unsigned long *hi)
{
cpumask_t oldmask;
oldmask = current->cpus_allowed;
set_cpus_allowed(current, cpumask_of_cpu(cpu));
rdmsr(msr, &lo, &hi);
set_cpus_allowed(current, oldmask);
}
[The above doesn't work, by the way. This approach was discussed a long
time ago, and vetoed due to the potential for deadlock.]
-hpa
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