x86/cpuid: Add Hygon Dhyana support

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@hygon.cn>
Acked-by: Jan Beulich <jbeulich@suse.com>
[Rebase over 0cd074144cb "x86/cpu: Renumber X86_VENDOR_* to form a bitmap"]
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

diff --git a/xen/arch/x86/cpuid.c b/xen/arch/x86/cpuid.c
index 666fbbbdb12a1e03b53a2245855042e4399666fe..ea9bfc51b649abef84b8c4eceedf2e5fe571a745 100644 (file)
--- a/xen/arch/x86/cpuid.c
+++ b/xen/arch/x86/cpuid.c
@@ -237,6 +237,7 @@ 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);
@@ -387,7 +388,7 @@ 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 | X86_VENDOR_HYGON)) &&
          raw_cpuid_policy.basic.sep )
         __set_bit(X86_FEATURE_SEP, hvm_featureset);
 
@@ -462,7 +463,8 @@ 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 |
+                                                              X86_VENDOR_HYGON))
                                             ? CPUID_GUEST_NR_EXTD_AMD
                                             : CPUID_GUEST_NR_EXTD_INTEL) - 1);
 
@@ -504,7 +506,7 @@ 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 | X86_VENDOR_HYGON)) )
             __clear_bit(X86_FEATURE_SYSCALL, max_fs);
     }