[Xen-devel] [PATCH v6] x86/acpi: Add Hygon Dhyana support

[Pu Wen <puwen@xxxxxxxx>]

Add Hygon Dhyana support to the acpi cpufreq and cpuidle subsystems by
using the code path of AMD.

[Rebase over 0cd07414 "x86/cpu: Renumber X86_VENDOR_* to form a bitmap"]

Signed-off-by: Pu Wen <puwen@xxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/acpi/cpu_idle.c         | 3 ++-
 xen/arch/x86/acpi/cpufreq/cpufreq.c  | 8 +++++---
 xen/arch/x86/acpi/cpufreq/powernow.c | 2 +-
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/xen/arch/x86/acpi/cpu_idle.c b/xen/arch/x86/acpi/cpu_idle.c
index 8846722..5931928 100644
--- a/xen/arch/x86/acpi/cpu_idle.c
+++ b/xen/arch/x86/acpi/cpu_idle.c
@@ -802,7 +802,8 @@ void acpi_dead_idle(void)
             __mwait(cx->address, 0);
         }
     }
-    else if ( current_cpu_data.x86_vendor == X86_VENDOR_AMD &&
+    else if ( (current_cpu_data.x86_vendor &
+               (X86_VENDOR_AMD | X86_VENDOR_HYGON)) &&
               cx->entry_method == ACPI_CSTATE_EM_SYSIO )
     {
         /* Intel prefers not to use SYSIO */
diff --git a/xen/arch/x86/acpi/cpufreq/cpufreq.c 
b/xen/arch/x86/acpi/cpufreq/cpufreq.c
index f4e13e1..7086d1a 100644
--- a/xen/arch/x86/acpi/cpufreq/cpufreq.c
+++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c
@@ -649,7 +649,8 @@ static int __init cpufreq_driver_init(void)
         (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL))
         ret = cpufreq_register_driver(&acpi_cpufreq_driver);
     else if ((cpufreq_controller == FREQCTL_xen) &&
-        (boot_cpu_data.x86_vendor == X86_VENDOR_AMD))
+        (boot_cpu_data.x86_vendor &
+         (X86_VENDOR_AMD | X86_VENDOR_HYGON)))
         ret = powernow_register_driver();
 
     return ret;
@@ -660,8 +661,9 @@ int cpufreq_cpu_init(unsigned int cpuid)
 {
     int ret;
 
-    /* Currently we only handle Intel and AMD processor */
-    if ( boot_cpu_data.x86_vendor & (X86_VENDOR_INTEL | X86_VENDOR_AMD) )
+    /* Currently we only handle Intel, AMD and Hygon processor */
+    if ( boot_cpu_data.x86_vendor &
+         (X86_VENDOR_INTEL | X86_VENDOR_AMD | X86_VENDOR_HYGON) )
         ret = cpufreq_add_cpu(cpuid);
     else
         ret = -EFAULT;
diff --git a/xen/arch/x86/acpi/cpufreq/powernow.c 
b/xen/arch/x86/acpi/cpufreq/powernow.c
index 025b37d..72ab6a1 100644
--- a/xen/arch/x86/acpi/cpufreq/powernow.c
+++ b/xen/arch/x86/acpi/cpufreq/powernow.c
@@ -360,7 +360,7 @@ unsigned int __init powernow_register_driver()
 
     for_each_online_cpu(i) {
         struct cpuinfo_x86 *c = &cpu_data[i];
-        if (c->x86_vendor != X86_VENDOR_AMD)
+        if (!(c->x86_vendor & (X86_VENDOR_AMD | X86_VENDOR_HYGON)))
             ret = -ENODEV;
         else
         {
-- 
2.7.4


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