diff options
| author |   Akshu Agrawal <Akshu.Agrawal@amd.com> | 2018-01-18 15:51:30 +0530 |
|---|---|---|
| committer |   Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-02-07 11:26:37 +0100 |
| commit | 59a3b3a8db16621574cbac69f6f1eddb9c60e821 (patch) | |
| tree | 3aa46cf5f5cde496c79e86b304c932f1dbf92d28 /drivers/cpufreq/amd_freq_sensitivity.c | |
| parent | cpufreq: Skip cpufreq resume if it's not suspended (diff) | |
| download | linux-dev-59a3b3a8db16621574cbac69f6f1eddb9c60e821.tar.xz linux-dev-59a3b3a8db16621574cbac69f6f1eddb9c60e821.zip | |
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>
Diffstat (limited to 'drivers/cpufreq/amd_freq_sensitivity.c')
| -rw-r--r-- | drivers/cpufreq/amd_freq_sensitivity.c | 11 |
1 files 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 @@ 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; |