[Xen-devel] [PATCH 09/11] driver/cpufreq: Add support for Hygon's Dhyana Family 18h processor

[Pu Wen <puwen@xxxxxxxx>]

This patch enables the cpufreq driver support to Hygon Family 18h CPU:
- It recognize Hygon's boost state in boost_state(),
  boost_set_msr(), extract_msr() functions.
- It also add SMBUS support for Hygon Family 18h in
  amd_freq_sensitivity_init().

Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
 drivers/cpufreq/acpi-cpufreq.c         | 5 ++++-
 drivers/cpufreq/amd_freq_sensitivity.c | 9 +++++++--
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/cpufreq/acpi-cpufreq.c b/drivers/cpufreq/acpi-cpufreq.c
index 9449657..04c9b81 100644
--- a/drivers/cpufreq/acpi-cpufreq.c
+++ b/drivers/cpufreq/acpi-cpufreq.c
@@ -95,6 +95,7 @@ static bool boost_state(unsigned int cpu)
                rdmsr_on_cpu(cpu, MSR_IA32_MISC_ENABLE, &lo, &hi);
                msr = lo | ((u64)hi << 32);
                return !(msr & MSR_IA32_MISC_ENABLE_TURBO_DISABLE);
+       case X86_VENDOR_HYGON:
        case X86_VENDOR_AMD:
                rdmsr_on_cpu(cpu, MSR_K7_HWCR, &lo, &hi);
                msr = lo | ((u64)hi << 32);
@@ -113,6 +114,7 @@ static int boost_set_msr(bool enable)
                msr_addr = MSR_IA32_MISC_ENABLE;
                msr_mask = MSR_IA32_MISC_ENABLE_TURBO_DISABLE;
                break;
+       case X86_VENDOR_HYGON:
        case X86_VENDOR_AMD:
                msr_addr = MSR_K7_HWCR;
                msr_mask = MSR_K7_HWCR_CPB_DIS;
@@ -223,7 +225,8 @@ static unsigned extract_msr(struct cpufreq_policy *policy, 
u32 msr)
        struct cpufreq_frequency_table *pos;
        struct acpi_processor_performance *perf;
 
-       if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+       if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+           boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
                msr &= AMD_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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