diff mbox series

cpufreq: Add Zhaoxin turbo boost control interface support

Message ID 8b748cc6-09c9-081c-c0c5-2e75f017b032@zhaoxin.com
State Accepted
Commit d6f895965592d5cd2771860639219964df85d555
Headers show
Series cpufreq: Add Zhaoxin turbo boost control interface support | expand

Commit Message

Tony W Wang-oc June 22, 2022, 3:29 a.m. UTC 
Recent Zhaoxin 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 Zhaoxin too.

Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
---
  drivers/cpufreq/acpi-cpufreq.c | 4 ++++
  1 file changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 3d514b8..1bb2b90 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/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;