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| author | Andi Kleen <ak@suse.de> | 2006-04-11 12:54:36 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-11 06:38:57 -0700 |
| commit | 0fcd270901f731342df64816f277ae7adbd67130 (patch) | |
| tree | 44dc15a768c5bcac8678dab19c537ba6a6e8a7d6 /arch/i386 | |
| parent | 88dd9c16cecbd105bbe7711b6120333f6f7b5474 (diff) | |
| download | linux-0fcd270901f731342df64816f277ae7adbd67130.tar.gz linux-0fcd270901f731342df64816f277ae7adbd67130.tar.bz2 linux-0fcd270901f731342df64816f277ae7adbd67130.zip | |
[PATCH] x86-64/i386: Don't process APICs/IO-APICs in ACPI when APIC is disabled.
When nolapic was passed or the local APIC was disabled
for another reason ACPI would still parse the IO-APICs
until these were explicitely disabled with noapic.
Usually this resulted in a non booting configuration unless
"nolapic noapic" was used.
I also disabled the local APIC parsing in this case, although
that's only cosmetic (suppresses a few printks)
This hopefully makes nolapic work in all cases.
Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/acpi/boot.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/i386/kernel/acpi/boot.c b/arch/i386/kernel/acpi/boot.c index 8dab3527bc97..030a0007a4e0 100644 --- a/arch/i386/kernel/acpi/boot.c +++ b/arch/i386/kernel/acpi/boot.c @@ -168,7 +168,7 @@ int __init acpi_parse_mcfg(unsigned long phys_addr, unsigned long size) unsigned long i; int config_size; - if (!phys_addr || !size) + if (!phys_addr || !size || !cpu_has_apic) return -EINVAL; mcfg = (struct acpi_table_mcfg *)__acpi_map_table(phys_addr, size); @@ -693,6 +693,9 @@ static int __init acpi_parse_madt_lapic_entries(void) { int count; + if (!cpu_has_apic) + return -ENODEV; + /* * Note that the LAPIC address is obtained from the MADT (32-bit value) * and (optionally) overriden by a LAPIC_ADDR_OVR entry (64-bit value). |