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| author | Jacob Pan <jacob.jun.pan@linux.intel.com> | 2010-05-14 14:41:20 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2010-05-16 22:47:41 -0700 |
| commit | fea24e28c663e62663097f0ed3b8ff1f9a87f15e (patch) | |
| tree | 08ff53a480caaeecb8b8b32a069eaba6fd1c4008 /arch/x86/kernel | |
| parent | e4af4268a34d8cd28c46a03161fc017cbd2db887 (diff) | |
| download | linux-fea24e28c663e62663097f0ed3b8ff1f9a87f15e.tar.bz2 | |
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>
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/mrst.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/mrst.c b/arch/x86/kernel/mrst.c index 0aad8670858e..e796448f0eb5 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; + } |