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x86/apic: Add Hygon Dhyana support

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Add Hygon Dhyana support to the APIC subsystem. When running in 32 bit
mode, bigsmp should be enabled if there are more than 8 cores online.

Signed-off-by: Pu Wen <puwen@hygon.cn>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: tglx@linutronix.de
Cc: mingo@redhat.com
Cc: hpa@zytor.com
Cc: x86@kernel.org
Cc: thomas.lendacky@amd.com
Link: https://lkml.kernel.org/r/7a557265a8c7c9e842fe60f9d8e064458801aef3.1537533369.git.puwen@hygon.cn
This commit is contained in:
Pu Wen 2018-09-23 17:35:28 +08:00 committed by Borislav Petkov
parent c6babb5806
commit da33dfef40
2 changed files with 8 additions and 0 deletions
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7
arch/x86/kernel/apic/apic.c
View file

@ -224,6 +224,11 @@ 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;
}
@ -1912,6 +1917,8 @@ 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)))

1
arch/x86/kernel/apic/probe_32.c
View file

@ -185,6 +185,7 @@ void __init default_setup_apic_routing(void)
break;
}
/* If P4 and above fall through */
case X86_VENDOR_HYGON:
case X86_VENDOR_AMD:
def_to_bigsmp = 1;
}