forked from Minki/linux
893f38d144
Jens found the following crash/regression:
[ 0.000000] found SMP MP-table at [ffff8800000fdd80] fdd80
[ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 0-fff BIOS data page
and
[ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 6000-7fff TRAMPOLINE
and bisected it to b24c2a9 ("x86: Move find_smp_config()
earlier and avoid bootmem usage").
It turns out the BIOS is using the first 64k for mptable,
without reserving it.
So try to find good range for the real-mode trampoline instead of
hard coding it, in case some bios tries to use that range for sth.
Reported-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Tested-by: Jens Axboe <jens.axboe@oracle.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
LKML-Reference: <4B21630A.6000308@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/*
|
|
* linux/arch/i386/kernel/head32.c -- prepare to run common code
|
|
*
|
|
* Copyright (C) 2000 Andrea Arcangeli <andrea@suse.de> SuSE
|
|
* Copyright (C) 2007 Eric Biederman <ebiederm@xmission.com>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/start_kernel.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/sections.h>
|
|
#include <asm/e820.h>
|
|
#include <asm/page.h>
|
|
#include <asm/trampoline.h>
|
|
#include <asm/apic.h>
|
|
#include <asm/io_apic.h>
|
|
#include <asm/bios_ebda.h>
|
|
|
|
static void __init i386_default_early_setup(void)
|
|
{
|
|
/* Initilize 32bit specific setup functions */
|
|
x86_init.resources.probe_roms = probe_roms;
|
|
x86_init.resources.reserve_resources = i386_reserve_resources;
|
|
x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc;
|
|
|
|
reserve_ebda_region();
|
|
}
|
|
|
|
void __init i386_start_kernel(void)
|
|
{
|
|
reserve_early(__pa_symbol(&_text), __pa_symbol(&__bss_stop), "TEXT DATA BSS");
|
|
|
|
#ifdef CONFIG_BLK_DEV_INITRD
|
|
/* Reserve INITRD */
|
|
if (boot_params.hdr.type_of_loader && boot_params.hdr.ramdisk_image) {
|
|
u64 ramdisk_image = boot_params.hdr.ramdisk_image;
|
|
u64 ramdisk_size = boot_params.hdr.ramdisk_size;
|
|
u64 ramdisk_end = ramdisk_image + ramdisk_size;
|
|
reserve_early(ramdisk_image, ramdisk_end, "RAMDISK");
|
|
}
|
|
#endif
|
|
|
|
/* Call the subarch specific early setup function */
|
|
switch (boot_params.hdr.hardware_subarch) {
|
|
case X86_SUBARCH_MRST:
|
|
x86_mrst_early_setup();
|
|
break;
|
|
default:
|
|
i386_default_early_setup();
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* At this point everything still needed from the boot loader
|
|
* or BIOS or kernel text should be early reserved or marked not
|
|
* RAM in e820. All other memory is free game.
|
|
*/
|
|
|
|
start_kernel();
|
|
}
|