[Xen-devel] [PATCH v2 15/17] driver/cpufreq: enable Hygon support to cpufreq driver

[Pu Wen]

Enable ACPI cpufreq driver support for Hygon by adding family ID check
along with AMD.

As Hygon platforms have SMBus device(PCI device ID 0x790b), enable Hygon
support to function amd_freq_sensitivity_init().

Signed-off-by: Pu Wen <pu...@hygon.cn>
---
 drivers/cpufreq/acpi-cpufreq.c         | 11 +++++++++++
 drivers/cpufreq/amd_freq_sensitivity.c |  9 +++++++--
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index b61f4ec..cd97a7e 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -61,6 +61,7 @@ enum {
 
 #define INTEL_MSR_RANGE                (0xffff)
 #define AMD_MSR_RANGE          (0x7)
+#define HYGON_MSR_RANGE                (0x7)
 
 #define MSR_K7_HWCR_CPB_DIS    (1ULL << 25)
 
@@ -99,6 +100,10 @@ static bool boost_state(unsigned int cpu)
                rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi);
                msr = lo | ((u64)hi << 32);
                return !(msr & MSR_K7_HWCR_CPB_DIS);
+       case X86_VENDOR_HYGON:
+               rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi);
+               msr = lo | ((u64)hi << 32);
+               return !(msr & MSR_K7_HWCR_CPB_DIS);
        }
        return false;
 }
@@ -117,6 +122,10 @@ static int boost_set_msr(bool enable)
                msr_addr = MSR_K7_HWCR;
                msr_mask = MSR_K7_HWCR_CPB_DIS;
                break;
+       case X86_VENDOR_HYGON:
+               msr_addr = MSR_K7_HWCR;
+               msr_mask = MSR_K7_HWCR_CPB_DIS;
+               break;
        default:
                return -EINVAL;
        }
@@ -225,6 +234,8 @@ static unsigned extract_msr(struct cpufreq_policy *policy, 
u32 msr)
 
        if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
                msr &= AMD_MSR_RANGE;
+       else if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
+               msr &= HYGON_MSR_RANGE;
        else
                msr &= INTEL_MSR_RANGE;
 
diff --git a/drivers/cpufreq/amd_freq_sensitivity.c 
b/drivers/cpufreq/amd_freq_sensitivity.c
index be926d9..4ac7c3c 100644
--- a/drivers/cpufreq/amd_freq_sensitivity.c
+++ b/drivers/cpufreq/amd_freq_sensitivity.c
@@ -111,11 +111,16 @@ static int __init amd_freq_sensitivity_init(void)
 {
        u64 val;
        struct pci_dev *pcidev;
+       unsigned int pci_vendor;
 
-       if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD)
+       if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+               pci_vendor = PCI_VENDOR_ID_AMD;
+       else if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
+               pci_vendor = PCI_VENDOR_ID_HYGON;
+       else
                return -ENODEV;
 
-       pcidev = pci_get_device(PCI_VENDOR_ID_AMD,
+       pcidev = pci_get_device(pci_vendor,
                        PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
 
        if (!pcidev) {
-- 
2.7.4


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