Re: [PATCH V2] cpufreq: Add Zhaoxin/Centaur turbo boost control interface support

Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx> · Thu, 30 Jun 2022 09:58:00 +0800

On 30/6/2022 02:16, Rafael J. Wysocki wrote:
On Thu, Jun 23, 2022 at 3:21 AM Tony W Wang-oc <TonyWWang-oc@xxxxxxxxxxx> wrote:

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 <TonyWWang-oc@xxxxxxxxxxx>
---
   drivers/cpufreq/acpi-cpufreq.c | 4 ++++
   1 file changed, 4 insertions(+)

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;
--

Applied as 5.20 material.


Thanks a lot.

However, I had to manually fix up the formatting of the patch.


Sorry for inconvenient.

Can you please configure your e-mail client so that this is not
necessary in the future?


Was using the Thunderbird client to send patch, and will use git 
send-email in the future.

Thanks!
.


--
Sincerely
TonyWWang-oc






