x86/apic: Add Hygon Dhyana support (da33dfef) · Commits · 戴 / test

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

arch/x86/kernel/apic/apic.c

+7 −0

Original line number	Diff line number	Diff line
		@@ -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)))

arch/x86/kernel/apic/probe_32.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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;
		}

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