cpufreq: ACPI: Add Zhaoxin/Centaur turbo boost control interface support

Recent Zhaoxin/Centaur CPUs support X86_FEATURE_IDA and the turbo boost
can be dynamically enabled or disabled through MSR 0x1a0[38] in the same
way as Intel. So add turbo boost control support for these CPUs too.

Signed-off-by: Tony W Wang-oc <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>

drivers/cpufreq/acpi-cpufreq.c

@@ -78,6 +78,8 @@ static bool boost_state(unsigned int cpu)
 
 	switch (boot_cpu_data.x86_vendor) {
 	case X86_VENDOR_INTEL:
+	case X86_VENDOR_CENTAUR:
+	case X86_VENDOR_ZHAOXIN:
 		rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi);
 		msr = lo | ((u64)hi << 32);
 		return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE);
@@ -97,6 +99,8 @@ static int boost_set_msr(bool enable)
 
 	switch (boot_cpu_data.x86_vendor) {
 	case X86_VENDOR_INTEL:
+	case X86_VENDOR_CENTAUR:
+	case X86_VENDOR_ZHAOXIN:
 		msr_addr = MSR_IA32_MISC_ENABLE;
 		msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE;
 		break;