x86: check command line when CONFIG_X86_MPPARSE is not set, v2

if acpi=off, acpi=noirq and pci=noacpi, we need to disable apic.

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Maciej W. Rozycki" <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c
index 369d0fe1ff9c..cad4e893df05 100644
--- a/arch/x86/kernel/setup_32.c
+++ b/arch/x86/kernel/setup_32.c
@@ -677,6 +677,11 @@ void __init setup_arch(char **cmdline_p)
 
         parse_early_param();
 
+        if (acpi_mps_check()){
+                enable_local_apic = -1;
+                clear_cpu_cap(&boot_cpu_data, X86_FEATURE_APIC);
+        }
+
         finish_e820_parsing();
 
         probe_roms();