[Xen-devel] [PATCH v2 13/14] x86/cpuid: Add Hygon Dhyana support

[Pu Wen <puwen@xxxxxxxx>]

The Hygon Dhyana family 18h processor shares the same cpuid leaves as the
AMD family 17h one. So add Hygon Dhyana support to caculate the cpuid
policies as the AMD CPU does.

Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
 xen/arch/x86/cpuid.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/xen/arch/x86/cpuid.c b/xen/arch/x86/cpuid.c
index ab0aab6..f760594 100644
--- a/xen/arch/x86/cpuid.c
+++ b/xen/arch/x86/cpuid.c
@@ -240,6 +240,7 @@ static void recalculate_misc(struct cpuid_policy *p)
         break;
 
     case X86_VENDOR_AMD:
+    case X86_VENDOR_HYGON:
         zero_leaves(p->basic.raw, 0x2, 0x3);
         memset(p->cache.raw, 0, sizeof(p->cache.raw));
         zero_leaves(p->basic.raw, 0x9, 0xa);
@@ -390,7 +391,8 @@ static void __init calculate_hvm_max_policy(void)
      * long mode (and init_amd() has cleared it out of host capabilities), but
      * HVM guests are able if running in protected mode.
      */
-    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) &&
          raw_cpuid_policy.basic.sep )
         __set_bit(X86_FEATURE_SEP, hvm_featureset);
 
@@ -465,7 +467,8 @@ void recalculate_cpuid_policy(struct domain *d)
     p->basic.max_leaf   = min(p->basic.max_leaf,   max->basic.max_leaf);
     p->feat.max_subleaf = min(p->feat.max_subleaf, max->feat.max_subleaf);
     p->extd.max_leaf    = 0x80000000 | min(p->extd.max_leaf & 0xffff,
-                                           (p->x86_vendor == X86_VENDOR_AMD
+                                          ((p->x86_vendor == X86_VENDOR_AMD ||
+                                            p->x86_vendor == X86_VENDOR_HYGON)
                                             ? CPUID_GUEST_NR_EXTD_AMD
                                             : CPUID_GUEST_NR_EXTD_INTEL) - 1);
 
@@ -507,7 +510,8 @@ void recalculate_cpuid_policy(struct domain *d)
     if ( is_pv_32bit_domain(d) )
     {
         __clear_bit(X86_FEATURE_LM, max_fs);
-        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 )
             __clear_bit(X86_FEATURE_SYSCALL, max_fs);
     }
 
-- 
2.7.4


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