10 microseconds is too short.
Always set the cpu to the highest frequency so that we get through
boot and don't handicap cpus where powerd(8) is not used.
present in cpu_feature2. Also, use CPUID2_EST rather than a magic
number.
- Don't free the ACPI settings list in detach if we are going to fail the
request. Otherwise an attempt to kldunload est would free the array
but the driver would keep trying to use it.
MFC after: 1 week
CPUFREQ_DRV_SETTINGS(). The value of count on input is used to
prefent overflow of the settings buffer passed into CPUFREQ_DRV_SETTINGS().
This corrects the "est: CPU supports Enhanced Speedstep, but is not recognized."
error on my system.
MFC after: 1 week
Remove an unnecessary check of the table's bus clock. CPUs that
support this feature export only the high/low settings via the MSR,
packed into 32 bits.
Hardware from: Centaur Technologies
MFC after: 1 week
modern CPUs that have multiple VID#s that aren't detectable via public
methods. We use the control value from acpi_perf as the id16 for setting
a given frequency.
SMP systems. It appears all drivers except ichss should attach to each
CPU and that settings should be performed on each CPU. Add comments about
this. Also, add a guard for p4tcc's identify method being called more than
once.
on the previous generation of Pentium-M processors (Banias). Support for
Dothan and later processors involves working with acpi_perf(4) to extract
information about supported states. This driver should work on MP systems
including HTT. It is experimental and may have a few bugs but has been
tested to not crash at least.
Thanks to Colin Percival for his initial work on this driver.
