[PATCH] cpufreq: AMD: Ignore the check for ProcFeedback in ST/CZ
From: Akshu Agrawal <hidden>
Date: 2018-01-18 09:02:06
Subsystem:
cpu frequency scaling framework, the rest · Maintainers:
"Rafael J. Wysocki", Viresh Kumar, Linus Torvalds
In ST/CZ CPUID 8000_0007_EDX[11, ProcFeedbackInterface] is 0, but the mechanism is still available and can be used. Change-Id: I5751d92c628da9ad4e15ec34079090c4315d4f2a Signed-off-by: Akshu Agrawal <redacted> --- drivers/cpufreq/amd_freq_sensitivity.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/amd_freq_sensitivity.c b/drivers/cpufreq/amd_freq_sensitivity.c
index 042023bbbf62..be926d9a66e5 100644
--- a/drivers/cpufreq/amd_freq_sensitivity.c
+++ b/drivers/cpufreq/amd_freq_sensitivity.c@@ -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 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy, 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;
--
2.13.5