From 85e46035bec6f114ad07ce8a9c70388568b1afd4 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Mon, 17 Mar 2008 22:08:24 +0300 Subject: [PATCH] x86: limit scan to 1k of EBDA. Signed-off-by: Alexey Starikovskiy Signed-off-by: Ingo Molnar --- arch/x86/kernel/mpparse_64.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/mpparse_64.c b/arch/x86/kernel/mpparse_64.c index fb74135f9d..19c8264855 100644 --- a/arch/x86/kernel/mpparse_64.c +++ b/arch/x86/kernel/mpparse_64.c @@ -640,11 +640,13 @@ static void __init __find_smp_config(unsigned reserve) * trustworthy, simply because the SMP table may have been * stomped on during early boot. These loaders are buggy and * should be fixed. + * + * MP1.4 SPEC states to only scan first 1K of 4K EBDA. */ address = get_bios_ebda(); if (address) - smp_scan_config(address, 0x1000, reserve); + smp_scan_config(address, 0x400, reserve); } void __init early_find_smp_config(void) -- 2.39.5