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cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ 

In ST/CZ CPUID 8000_0007_EDX[11, ProcFeedbackInterface] is 0,
but the mechanism is still available and can be used.

Signed-off-by: Akshu Agrawal <akshu.agrawal@amd.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Akshu Agrawal 2018-01-18 15:51:30 +05:30 committed by Rafael J. Wysocki
parent 703cbaa601
commit 59a3b3a8db
1 changed files with 9 additions and 2 deletions
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11
drivers/cpufreq/amd_freq_sensitivity.c
View File

@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/percpu-defs.h>
#include <linux/init.h>
#include <linux/mod_devicetable.h>
@ -109,12 +110,18 @@ out:
static int __init amd_freq_sensitivity_init(void)
{
u64 val;
struct pci_dev *pcidev;
if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
return -ENODEV;
if (!static_cpu_has(X86_FEATURE_PROC_FEEDBACK))
return -ENODEV;
pcidev = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
if (!pcidev) {
if (!static_cpu_has(X86_FEATURE_PROC_FEEDBACK))
return -ENODEV;
}
if (rdmsrl_safe(MSR_AMD64_FREQ_SENSITIVITY_ACTUAL, &val))
return -ENODEV;