diff options
authorJacob Pan <jacob.jun.pan@linux.intel.com>2010-05-14 14:41:20 -0700
committerH. Peter Anvin <hpa@linux.intel.com>2010-05-16 22:47:41 -0700
commitfea24e28c663e62663097f0ed3b8ff1f9a87f15e (patch)
parente4af4268a34d8cd28c46a03161fc017cbd2db887 (diff)
x86, mrst: add nop functions to x86_init mpparse functions
Moorestown does not have BIOS provided MP tables, we can save some time by avoiding scaning of these tables. e.g. [ 0.000000] Scan SMP from c0000000 for 1024 bytes. [ 0.000000] Scan SMP from c009fc00 for 1024 bytes. [ 0.000000] Scan SMP from c00f0000 for 65536 bytes. [ 0.000000] Scan SMP from c00bfff0 for 1024 bytes. Searching EBDA with the base at 0x40E will also result in random pointer deferencing within 1MB. This can be a problem in Lincroft if the pointer hits VGA area and VGA mode is not enabled. Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> LKML-Reference: <1273873281-17489-8-git-send-email-jacob.jun.pan@linux.intel.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c
index 0aad8670858..e796448f0eb 100644
--- a/arch/x86/kernel/mrst.c
+++ b/arch/x86/kernel/mrst.c
@@ -237,4 +237,9 @@ void __init x86_mrst_early_setup(void)
x86_init.pci.fixup_irqs = x86_init_noop;
legacy_pic = &null_legacy_pic;
+ /* Avoid searching for BIOS MP tables */
+ x86_init.mpparse.find_smp_config = x86_init_noop;
+ x86_init.mpparse.get_smp_config = x86_init_uint_noop;