cpufreq: intel_pstate: Check cpuid for MSR_HWP_INTERRUPT
The MSR MSR_HWP_INTERRUPT is valid only when CPUID.06H:EAX[8] = 1, so check for feature before accessing this MSR. Signed-off-by:Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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