diff options
| author |   Andi Kleen <ak@suse.de> | 2006-04-07 19:49:39 +0200 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@g5.osdl.org> | 2006-04-09 11:53:51 -0700 |
| commit | d3b6a349d233aecf2c52f7f4c150ca09f684f2d8 (patch) | |
| tree | 3ab86b3ffc1dbe2eaa69c5bb041644975df60da7 /arch | |
| parent | [PATCH] x86_64: Don't sanity check Type 1 PCI bus access on newer systems (diff) | |
| download | linux-dev-d3b6a349d233aecf2c52f7f4c150ca09f684f2d8.tar.xz linux-dev-d3b6a349d233aecf2c52f7f4c150ca09f684f2d8.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.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -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 033066176b3e..8dab3527bc97 100644 --- a/arch/i386/kernel/acpi/boot.c +++ b/arch/i386/kernel/acpi/boot.c @@ -215,7 +215,7 @@ static int __init acpi_parse_madt(unsigned long phys_addr, unsigned long size) { struct acpi_table_madt *madt = NULL; - if (!phys_addr || !size) + if (!phys_addr || !size || !cpu_has_apic) return -EINVAL; madt = (struct acpi_table_madt *)__acpi_map_table(phys_addr, size); @@ -751,6 +751,9 @@ static int __init acpi_parse_madt_ioapic_entries(void) return -ENODEV; } + if (!cpu_has_apic) + return -ENODEV; + /* * if "noapic" boot option, don't look for IO-APICs */ |