Hygon processors use modern APIC, so just return in modern_apic() and
sync_Arb_IDs(). And should break in switch case in detect_init_API().
Signed-off-by: Pu Wen <puwen@xxxxxxxx>
---
arch/x86/kernel/apic/apic.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 2aabd4c..d8b7ac1 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -223,6 +223,11 @@ static int modern_apic(void)
if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
boot_cpu_data.x86 >= 0xf)
return 1;
+
+ /* Hygon systems use modern APIC */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
+ return 1;
+
return lapic_get_version() >= 0x14;
}
@@ -1207,9 +1212,11 @@ void __init sync_Arb_IDs(void)
{
/*
* Unsupported on P4 - see Intel Dev. Manual Vol. 3, Ch. 8.6.1 And not
- * needed on AMD.
+ * needed on AMD or Hygon.
*/
- if (modern_apic() || boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ if (modern_apic() ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
+ boot_cpu_data.x86_vendor == X86_VENDOR_HYGON)
return;
/*
@@ -1908,6 +1915,8 @@ static int __init detect_init_APIC(void)
(boot_cpu_data.x86 >= 15))
break;
goto no_apic;
+ case X86_VENDOR_HYGON:
+ break;
case X86_VENDOR_INTEL:
if (boot_cpu_data.x86 == 6 || boot_cpu_data.x86 == 15 ||
(boot_cpu_data.x86 == 5 && boot_cpu_has(X86_FEATURE_APIC)))
--
2.7.4
