Commit 85877061 authored Feb 03, 2009 by Borislav Petkov Committed by H. Peter Anvin Feb 03, 2009

x86: APIC: enable workaround on AMD Fam10h CPUs



Impact: fix to enable APIC for AMD Fam10h on chipsets with a missing/b0rked
	ACPI MP table (MADT)

Booting a 32bit kernel on an AMD Fam10h CPU running on chipsets with
missing/b0rked MP table leads to a hang pretty early in the boot process
due to the APIC not being initialized. Fix that by falling back to the
default APIC base address in 32bit code, as it is done in the 64bit
codepath.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

parent bcde563c

arch/x86/kernel/apic.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1436,7 +1436,7 @@ static int __init detect_init_APIC(void)
		switch (boot_cpu_data.x86_vendor) {
		case X86_VENDOR_AMD:
		if ((boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model > 1) \|\|
		(boot_cpu_data.x86 == 15))
		(boot_cpu_data.x86 >= 15))
		break;
		goto no_apic;
		case X86_VENDOR_INTEL:

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