![Philipp Kohlbecher](/assets/img/avatar_default.png)
Impact: widen the reach of the low-memory-protect DMI quirk Phoenix BIOSes variously identify their vendor as "Phoenix Technologies, LTD" or "Phoenix Technologies LTD" (without the comma.) This patch makes the identification string in the bad_bios_dmi_table more general (following a suggestion by Ingo Molnar), so that both versions are handled. Again, the patched file compiles cleanly and the patch has been tested successfully on my machine. Signed-off-by: Philipp Kohlbecher <xt28@gmx.de> Cc: <stable@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
1110 lines
26 KiB
C
1110 lines
26 KiB
C
/*
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* Copyright (C) 1995 Linus Torvalds
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*
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* Support of BIGMEM added by Gerhard Wichert, Siemens AG, July 1999
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*
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* Memory region support
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* David Parsons <orc@pell.chi.il.us>, July-August 1999
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*
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* Added E820 sanitization routine (removes overlapping memory regions);
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* Brian Moyle <bmoyle@mvista.com>, February 2001
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*
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* Moved CPU detection code to cpu/${cpu}.c
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* Patrick Mochel <mochel@osdl.org>, March 2002
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*
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* Provisions for empty E820 memory regions (reported by certain BIOSes).
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* Alex Achenbach <xela@slit.de>, December 2002.
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*
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*/
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/*
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* This file handles the architecture-dependent parts of initialization
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*/
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/mmzone.h>
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#include <linux/screen_info.h>
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#include <linux/ioport.h>
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#include <linux/acpi.h>
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#include <linux/apm_bios.h>
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#include <linux/initrd.h>
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#include <linux/bootmem.h>
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#include <linux/seq_file.h>
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#include <linux/console.h>
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#include <linux/mca.h>
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#include <linux/root_dev.h>
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#include <linux/highmem.h>
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#include <linux/module.h>
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#include <linux/efi.h>
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#include <linux/init.h>
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#include <linux/edd.h>
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#include <linux/iscsi_ibft.h>
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#include <linux/nodemask.h>
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#include <linux/kexec.h>
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#include <linux/dmi.h>
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#include <linux/pfn.h>
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#include <linux/pci.h>
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#include <asm/pci-direct.h>
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#include <linux/init_ohci1394_dma.h>
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#include <linux/kvm_para.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/stddef.h>
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#include <linux/unistd.h>
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#include <linux/ptrace.h>
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#include <linux/slab.h>
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#include <linux/user.h>
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#include <linux/delay.h>
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#include <linux/kallsyms.h>
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#include <linux/cpufreq.h>
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#include <linux/dma-mapping.h>
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#include <linux/ctype.h>
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#include <linux/uaccess.h>
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#include <linux/percpu.h>
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#include <linux/crash_dump.h>
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#include <video/edid.h>
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#include <asm/mtrr.h>
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#include <asm/apic.h>
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#include <asm/e820.h>
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#include <asm/mpspec.h>
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#include <asm/setup.h>
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#include <asm/arch_hooks.h>
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#include <asm/efi.h>
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#include <asm/sections.h>
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#include <asm/dmi.h>
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#include <asm/io_apic.h>
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#include <asm/ist.h>
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#include <asm/vmi.h>
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#include <setup_arch.h>
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#include <asm/bios_ebda.h>
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#include <asm/cacheflush.h>
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#include <asm/processor.h>
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#include <asm/bugs.h>
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#include <asm/system.h>
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#include <asm/vsyscall.h>
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#include <asm/smp.h>
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#include <asm/desc.h>
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#include <asm/dma.h>
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#include <asm/iommu.h>
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#include <asm/mmu_context.h>
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#include <asm/proto.h>
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#include <mach_apic.h>
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#include <asm/paravirt.h>
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#include <asm/percpu.h>
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#include <asm/topology.h>
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#include <asm/apicdef.h>
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#ifdef CONFIG_X86_64
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#include <asm/numa_64.h>
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#endif
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#ifndef ARCH_SETUP
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#define ARCH_SETUP
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#endif
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#ifndef CONFIG_DEBUG_BOOT_PARAMS
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struct boot_params __initdata boot_params;
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#else
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struct boot_params boot_params;
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#endif
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/*
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* Machine setup..
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*/
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static struct resource data_resource = {
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.name = "Kernel data",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource code_resource = {
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.name = "Kernel code",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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static struct resource bss_resource = {
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.name = "Kernel bss",
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.start = 0,
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.end = 0,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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#ifdef CONFIG_X86_32
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/* This value is set up by the early boot code to point to the value
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immediately after the boot time page tables. It contains a *physical*
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address, and must not be in the .bss segment! */
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unsigned long init_pg_tables_start __initdata = ~0UL;
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unsigned long init_pg_tables_end __initdata = ~0UL;
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static struct resource video_ram_resource = {
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.name = "Video RAM area",
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.start = 0xa0000,
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.end = 0xbffff,
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.flags = IORESOURCE_BUSY | IORESOURCE_MEM
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};
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/* cpu data as detected by the assembly code in head.S */
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struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1};
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/* common cpu data for all cpus */
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struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1};
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EXPORT_SYMBOL(boot_cpu_data);
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static void set_mca_bus(int x)
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{
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#ifdef CONFIG_MCA
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MCA_bus = x;
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#endif
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}
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unsigned int def_to_bigsmp;
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/* for MCA, but anyone else can use it if they want */
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unsigned int machine_id;
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unsigned int machine_submodel_id;
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unsigned int BIOS_revision;
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struct apm_info apm_info;
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EXPORT_SYMBOL(apm_info);
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#if defined(CONFIG_X86_SPEEDSTEP_SMI) || \
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defined(CONFIG_X86_SPEEDSTEP_SMI_MODULE)
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struct ist_info ist_info;
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EXPORT_SYMBOL(ist_info);
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#else
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struct ist_info ist_info;
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#endif
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#else
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struct cpuinfo_x86 boot_cpu_data __read_mostly;
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EXPORT_SYMBOL(boot_cpu_data);
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#endif
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#if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64)
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unsigned long mmu_cr4_features;
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#else
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unsigned long mmu_cr4_features = X86_CR4_PAE;
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#endif
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/* Boot loader ID as an integer, for the benefit of proc_dointvec */
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int bootloader_type;
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/*
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* Early DMI memory
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*/
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int dmi_alloc_index;
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char dmi_alloc_data[DMI_MAX_DATA];
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/*
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* Setup options
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*/
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struct screen_info screen_info;
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EXPORT_SYMBOL(screen_info);
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struct edid_info edid_info;
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EXPORT_SYMBOL_GPL(edid_info);
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extern int root_mountflags;
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unsigned long saved_video_mode;
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#define RAMDISK_IMAGE_START_MASK 0x07FF
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#define RAMDISK_PROMPT_FLAG 0x8000
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#define RAMDISK_LOAD_FLAG 0x4000
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static char __initdata command_line[COMMAND_LINE_SIZE];
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#ifdef CONFIG_CMDLINE_BOOL
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static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE;
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#endif
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#if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE)
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struct edd edd;
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#ifdef CONFIG_EDD_MODULE
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EXPORT_SYMBOL(edd);
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#endif
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/**
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* copy_edd() - Copy the BIOS EDD information
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* from boot_params into a safe place.
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*
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*/
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static inline void copy_edd(void)
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{
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memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer,
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sizeof(edd.mbr_signature));
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memcpy(edd.edd_info, boot_params.eddbuf, sizeof(edd.edd_info));
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edd.mbr_signature_nr = boot_params.edd_mbr_sig_buf_entries;
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edd.edd_info_nr = boot_params.eddbuf_entries;
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}
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#else
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static inline void copy_edd(void)
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{
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}
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#endif
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#ifdef CONFIG_BLK_DEV_INITRD
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#ifdef CONFIG_X86_32
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#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT)
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static void __init relocate_initrd(void)
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{
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u64 ramdisk_image = boot_params.hdr.ramdisk_image;
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u64 ramdisk_size = boot_params.hdr.ramdisk_size;
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u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
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u64 ramdisk_here;
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unsigned long slop, clen, mapaddr;
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char *p, *q;
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/* We need to move the initrd down into lowmem */
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ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size,
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PAGE_SIZE);
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if (ramdisk_here == -1ULL)
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panic("Cannot find place for new RAMDISK of size %lld\n",
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ramdisk_size);
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/* Note: this includes all the lowmem currently occupied by
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the initrd, we rely on that fact to keep the data intact. */
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reserve_early(ramdisk_here, ramdisk_here + ramdisk_size,
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"NEW RAMDISK");
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initrd_start = ramdisk_here + PAGE_OFFSET;
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initrd_end = initrd_start + ramdisk_size;
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printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n",
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ramdisk_here, ramdisk_here + ramdisk_size);
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q = (char *)initrd_start;
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/* Copy any lowmem portion of the initrd */
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if (ramdisk_image < end_of_lowmem) {
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clen = end_of_lowmem - ramdisk_image;
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p = (char *)__va(ramdisk_image);
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memcpy(q, p, clen);
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q += clen;
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ramdisk_image += clen;
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ramdisk_size -= clen;
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}
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/* Copy the highmem portion of the initrd */
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while (ramdisk_size) {
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slop = ramdisk_image & ~PAGE_MASK;
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clen = ramdisk_size;
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if (clen > MAX_MAP_CHUNK-slop)
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clen = MAX_MAP_CHUNK-slop;
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mapaddr = ramdisk_image & PAGE_MASK;
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p = early_memremap(mapaddr, clen+slop);
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memcpy(q, p+slop, clen);
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early_iounmap(p, clen+slop);
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q += clen;
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ramdisk_image += clen;
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ramdisk_size -= clen;
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}
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/* high pages is not converted by early_res_to_bootmem */
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ramdisk_image = boot_params.hdr.ramdisk_image;
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ramdisk_size = boot_params.hdr.ramdisk_size;
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printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to"
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" %08llx - %08llx\n",
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ramdisk_image, ramdisk_image + ramdisk_size - 1,
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ramdisk_here, ramdisk_here + ramdisk_size - 1);
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}
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#endif
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static void __init reserve_initrd(void)
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{
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u64 ramdisk_image = boot_params.hdr.ramdisk_image;
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u64 ramdisk_size = boot_params.hdr.ramdisk_size;
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u64 ramdisk_end = ramdisk_image + ramdisk_size;
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u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT;
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if (!boot_params.hdr.type_of_loader ||
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!ramdisk_image || !ramdisk_size)
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return; /* No initrd provided by bootloader */
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initrd_start = 0;
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if (ramdisk_size >= (end_of_lowmem>>1)) {
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free_early(ramdisk_image, ramdisk_end);
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printk(KERN_ERR "initrd too large to handle, "
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"disabling initrd\n");
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return;
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}
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printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image,
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ramdisk_end);
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if (ramdisk_end <= end_of_lowmem) {
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/* All in lowmem, easy case */
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/*
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* don't need to reserve again, already reserved early
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* in i386_start_kernel
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*/
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initrd_start = ramdisk_image + PAGE_OFFSET;
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initrd_end = initrd_start + ramdisk_size;
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return;
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}
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#ifdef CONFIG_X86_32
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relocate_initrd();
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#else
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printk(KERN_ERR "initrd extends beyond end of memory "
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"(0x%08llx > 0x%08llx)\ndisabling initrd\n",
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ramdisk_end, end_of_lowmem);
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initrd_start = 0;
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#endif
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free_early(ramdisk_image, ramdisk_end);
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}
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#else
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static void __init reserve_initrd(void)
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{
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}
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#endif /* CONFIG_BLK_DEV_INITRD */
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static void __init parse_setup_data(void)
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{
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struct setup_data *data;
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u64 pa_data;
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if (boot_params.hdr.version < 0x0209)
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return;
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pa_data = boot_params.hdr.setup_data;
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while (pa_data) {
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data = early_memremap(pa_data, PAGE_SIZE);
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switch (data->type) {
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case SETUP_E820_EXT:
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parse_e820_ext(data, pa_data);
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break;
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default:
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break;
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}
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pa_data = data->next;
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early_iounmap(data, PAGE_SIZE);
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}
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}
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static void __init e820_reserve_setup_data(void)
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{
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struct setup_data *data;
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u64 pa_data;
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int found = 0;
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if (boot_params.hdr.version < 0x0209)
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return;
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pa_data = boot_params.hdr.setup_data;
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while (pa_data) {
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data = early_memremap(pa_data, sizeof(*data));
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e820_update_range(pa_data, sizeof(*data)+data->len,
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E820_RAM, E820_RESERVED_KERN);
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found = 1;
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pa_data = data->next;
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early_iounmap(data, sizeof(*data));
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}
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if (!found)
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return;
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sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
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memcpy(&e820_saved, &e820, sizeof(struct e820map));
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printk(KERN_INFO "extended physical RAM map:\n");
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e820_print_map("reserve setup_data");
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}
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static void __init reserve_early_setup_data(void)
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{
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struct setup_data *data;
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u64 pa_data;
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char buf[32];
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if (boot_params.hdr.version < 0x0209)
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return;
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pa_data = boot_params.hdr.setup_data;
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while (pa_data) {
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data = early_memremap(pa_data, sizeof(*data));
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sprintf(buf, "setup data %x", data->type);
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reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf);
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pa_data = data->next;
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early_iounmap(data, sizeof(*data));
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}
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}
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/*
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* --------- Crashkernel reservation ------------------------------
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*/
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#ifdef CONFIG_KEXEC
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/**
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* Reserve @size bytes of crashkernel memory at any suitable offset.
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*
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* @size: Size of the crashkernel memory to reserve.
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* Returns the base address on success, and -1ULL on failure.
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*/
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unsigned long long __init find_and_reserve_crashkernel(unsigned long long size)
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{
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const unsigned long long alignment = 16<<20; /* 16M */
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unsigned long long start = 0LL;
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while (1) {
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int ret;
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start = find_e820_area(start, ULONG_MAX, size, alignment);
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if (start == -1ULL)
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return start;
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/* try to reserve it */
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ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE);
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if (ret >= 0)
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return start;
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start += alignment;
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}
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}
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static inline unsigned long long get_total_mem(void)
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{
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unsigned long long total;
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total = max_low_pfn - min_low_pfn;
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#ifdef CONFIG_HIGHMEM
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total += highend_pfn - highstart_pfn;
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#endif
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return total << PAGE_SHIFT;
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}
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static void __init reserve_crashkernel(void)
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{
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unsigned long long total_mem;
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unsigned long long crash_size, crash_base;
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int ret;
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total_mem = get_total_mem();
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ret = parse_crashkernel(boot_command_line, total_mem,
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&crash_size, &crash_base);
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if (ret != 0 || crash_size <= 0)
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return;
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/* 0 means: find the address automatically */
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if (crash_base <= 0) {
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crash_base = find_and_reserve_crashkernel(crash_size);
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if (crash_base == -1ULL) {
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pr_info("crashkernel reservation failed. "
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"No suitable area found.\n");
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return;
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}
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} else {
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|
ret = reserve_bootmem_generic(crash_base, crash_size,
|
|
BOOTMEM_EXCLUSIVE);
|
|
if (ret < 0) {
|
|
pr_info("crashkernel reservation failed - "
|
|
"memory is in use\n");
|
|
return;
|
|
}
|
|
}
|
|
|
|
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
|
|
"for crashkernel (System RAM: %ldMB)\n",
|
|
(unsigned long)(crash_size >> 20),
|
|
(unsigned long)(crash_base >> 20),
|
|
(unsigned long)(total_mem >> 20));
|
|
|
|
crashk_res.start = crash_base;
|
|
crashk_res.end = crash_base + crash_size - 1;
|
|
insert_resource(&iomem_resource, &crashk_res);
|
|
}
|
|
#else
|
|
static void __init reserve_crashkernel(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static struct resource standard_io_resources[] = {
|
|
{ .name = "dma1", .start = 0x00, .end = 0x1f,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "pic1", .start = 0x20, .end = 0x21,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "timer0", .start = 0x40, .end = 0x43,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "timer1", .start = 0x50, .end = 0x53,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "keyboard", .start = 0x60, .end = 0x60,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "keyboard", .start = 0x64, .end = 0x64,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "dma page reg", .start = 0x80, .end = 0x8f,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "pic2", .start = 0xa0, .end = 0xa1,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "dma2", .start = 0xc0, .end = 0xdf,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO },
|
|
{ .name = "fpu", .start = 0xf0, .end = 0xff,
|
|
.flags = IORESOURCE_BUSY | IORESOURCE_IO }
|
|
};
|
|
|
|
static void __init reserve_standard_io_resources(void)
|
|
{
|
|
int i;
|
|
|
|
/* request I/O space for devices used on all i[345]86 PCs */
|
|
for (i = 0; i < ARRAY_SIZE(standard_io_resources); i++)
|
|
request_resource(&ioport_resource, &standard_io_resources[i]);
|
|
|
|
}
|
|
|
|
/*
|
|
* Note: elfcorehdr_addr is not just limited to vmcore. It is also used by
|
|
* is_kdump_kernel() to determine if we are booting after a panic. Hence
|
|
* ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE.
|
|
*/
|
|
|
|
#ifdef CONFIG_CRASH_DUMP
|
|
/* elfcorehdr= specifies the location of elf core header
|
|
* stored by the crashed kernel. This option will be passed
|
|
* by kexec loader to the capture kernel.
|
|
*/
|
|
static int __init setup_elfcorehdr(char *arg)
|
|
{
|
|
char *end;
|
|
if (!arg)
|
|
return -EINVAL;
|
|
elfcorehdr_addr = memparse(arg, &end);
|
|
return end > arg ? 0 : -EINVAL;
|
|
}
|
|
early_param("elfcorehdr", setup_elfcorehdr);
|
|
#endif
|
|
|
|
static struct x86_quirks default_x86_quirks __initdata;
|
|
|
|
struct x86_quirks *x86_quirks __initdata = &default_x86_quirks;
|
|
|
|
/*
|
|
* Some BIOSes seem to corrupt the low 64k of memory during events
|
|
* like suspend/resume and unplugging an HDMI cable. Reserve all
|
|
* remaining free memory in that area and fill it with a distinct
|
|
* pattern.
|
|
*/
|
|
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
|
|
#define MAX_SCAN_AREAS 8
|
|
|
|
static int __read_mostly memory_corruption_check = -1;
|
|
|
|
static unsigned __read_mostly corruption_check_size = 64*1024;
|
|
static unsigned __read_mostly corruption_check_period = 60; /* seconds */
|
|
|
|
static struct e820entry scan_areas[MAX_SCAN_AREAS];
|
|
static int num_scan_areas;
|
|
|
|
|
|
static int set_corruption_check(char *arg)
|
|
{
|
|
char *end;
|
|
|
|
memory_corruption_check = simple_strtol(arg, &end, 10);
|
|
|
|
return (*end == 0) ? 0 : -EINVAL;
|
|
}
|
|
early_param("memory_corruption_check", set_corruption_check);
|
|
|
|
static int set_corruption_check_period(char *arg)
|
|
{
|
|
char *end;
|
|
|
|
corruption_check_period = simple_strtoul(arg, &end, 10);
|
|
|
|
return (*end == 0) ? 0 : -EINVAL;
|
|
}
|
|
early_param("memory_corruption_check_period", set_corruption_check_period);
|
|
|
|
static int set_corruption_check_size(char *arg)
|
|
{
|
|
char *end;
|
|
unsigned size;
|
|
|
|
size = memparse(arg, &end);
|
|
|
|
if (*end == '\0')
|
|
corruption_check_size = size;
|
|
|
|
return (size == corruption_check_size) ? 0 : -EINVAL;
|
|
}
|
|
early_param("memory_corruption_check_size", set_corruption_check_size);
|
|
|
|
|
|
static void __init setup_bios_corruption_check(void)
|
|
{
|
|
u64 addr = PAGE_SIZE; /* assume first page is reserved anyway */
|
|
|
|
if (memory_corruption_check == -1) {
|
|
memory_corruption_check =
|
|
#ifdef CONFIG_X86_BOOTPARAM_MEMORY_CORRUPTION_CHECK
|
|
1
|
|
#else
|
|
0
|
|
#endif
|
|
;
|
|
}
|
|
|
|
if (corruption_check_size == 0)
|
|
memory_corruption_check = 0;
|
|
|
|
if (!memory_corruption_check)
|
|
return;
|
|
|
|
corruption_check_size = round_up(corruption_check_size, PAGE_SIZE);
|
|
|
|
while(addr < corruption_check_size && num_scan_areas < MAX_SCAN_AREAS) {
|
|
u64 size;
|
|
addr = find_e820_area_size(addr, &size, PAGE_SIZE);
|
|
|
|
if (addr == 0)
|
|
break;
|
|
|
|
if ((addr + size) > corruption_check_size)
|
|
size = corruption_check_size - addr;
|
|
|
|
if (size == 0)
|
|
break;
|
|
|
|
e820_update_range(addr, size, E820_RAM, E820_RESERVED);
|
|
scan_areas[num_scan_areas].addr = addr;
|
|
scan_areas[num_scan_areas].size = size;
|
|
num_scan_areas++;
|
|
|
|
/* Assume we've already mapped this early memory */
|
|
memset(__va(addr), 0, size);
|
|
|
|
addr += size;
|
|
}
|
|
|
|
printk(KERN_INFO "Scanning %d areas for low memory corruption\n",
|
|
num_scan_areas);
|
|
update_e820();
|
|
}
|
|
|
|
static struct timer_list periodic_check_timer;
|
|
|
|
void check_for_bios_corruption(void)
|
|
{
|
|
int i;
|
|
int corruption = 0;
|
|
|
|
if (!memory_corruption_check)
|
|
return;
|
|
|
|
for(i = 0; i < num_scan_areas; i++) {
|
|
unsigned long *addr = __va(scan_areas[i].addr);
|
|
unsigned long size = scan_areas[i].size;
|
|
|
|
for(; size; addr++, size -= sizeof(unsigned long)) {
|
|
if (!*addr)
|
|
continue;
|
|
printk(KERN_ERR "Corrupted low memory at %p (%lx phys) = %08lx\n",
|
|
addr, __pa(addr), *addr);
|
|
corruption = 1;
|
|
*addr = 0;
|
|
}
|
|
}
|
|
|
|
WARN(corruption, KERN_ERR "Memory corruption detected in low memory\n");
|
|
}
|
|
|
|
static void periodic_check_for_corruption(unsigned long data)
|
|
{
|
|
check_for_bios_corruption();
|
|
mod_timer(&periodic_check_timer, round_jiffies(jiffies + corruption_check_period*HZ));
|
|
}
|
|
|
|
void start_periodic_check_for_corruption(void)
|
|
{
|
|
if (!memory_corruption_check || corruption_check_period == 0)
|
|
return;
|
|
|
|
printk(KERN_INFO "Scanning for low memory corruption every %d seconds\n",
|
|
corruption_check_period);
|
|
|
|
init_timer(&periodic_check_timer);
|
|
periodic_check_timer.function = &periodic_check_for_corruption;
|
|
periodic_check_for_corruption(0);
|
|
}
|
|
#endif
|
|
|
|
static int __init dmi_low_memory_corruption(const struct dmi_system_id *d)
|
|
{
|
|
printk(KERN_NOTICE
|
|
"%s detected: BIOS may corrupt low RAM, working it around.\n",
|
|
d->ident);
|
|
|
|
e820_update_range(0, 0x10000, E820_RAM, E820_RESERVED);
|
|
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* List of systems that have known low memory corruption BIOS problems */
|
|
static struct dmi_system_id __initdata bad_bios_dmi_table[] = {
|
|
#ifdef CONFIG_X86_RESERVE_LOW_64K
|
|
{
|
|
.callback = dmi_low_memory_corruption,
|
|
.ident = "AMI BIOS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
|
|
},
|
|
},
|
|
{
|
|
.callback = dmi_low_memory_corruption,
|
|
.ident = "Phoenix BIOS",
|
|
.matches = {
|
|
DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies"),
|
|
},
|
|
},
|
|
#endif
|
|
{}
|
|
};
|
|
|
|
/*
|
|
* Determine if we were loaded by an EFI loader. If so, then we have also been
|
|
* passed the efi memmap, systab, etc., so we should use these data structures
|
|
* for initialization. Note, the efi init code path is determined by the
|
|
* global efi_enabled. This allows the same kernel image to be used on existing
|
|
* systems (with a traditional BIOS) as well as on EFI systems.
|
|
*/
|
|
/*
|
|
* setup_arch - architecture-specific boot-time initializations
|
|
*
|
|
* Note: On x86_64, fixmaps are ready for use even before this is called.
|
|
*/
|
|
|
|
void __init setup_arch(char **cmdline_p)
|
|
{
|
|
#ifdef CONFIG_X86_32
|
|
memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
|
|
visws_early_detect();
|
|
pre_setup_arch_hook();
|
|
#else
|
|
printk(KERN_INFO "Command line: %s\n", boot_command_line);
|
|
#endif
|
|
|
|
early_cpu_init();
|
|
early_ioremap_init();
|
|
|
|
ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev);
|
|
screen_info = boot_params.screen_info;
|
|
edid_info = boot_params.edid_info;
|
|
#ifdef CONFIG_X86_32
|
|
apm_info.bios = boot_params.apm_bios_info;
|
|
ist_info = boot_params.ist_info;
|
|
if (boot_params.sys_desc_table.length != 0) {
|
|
set_mca_bus(boot_params.sys_desc_table.table[3] & 0x2);
|
|
machine_id = boot_params.sys_desc_table.table[0];
|
|
machine_submodel_id = boot_params.sys_desc_table.table[1];
|
|
BIOS_revision = boot_params.sys_desc_table.table[2];
|
|
}
|
|
#endif
|
|
saved_video_mode = boot_params.hdr.vid_mode;
|
|
bootloader_type = boot_params.hdr.type_of_loader;
|
|
|
|
#ifdef CONFIG_BLK_DEV_RAM
|
|
rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK;
|
|
rd_prompt = ((boot_params.hdr.ram_size & RAMDISK_PROMPT_FLAG) != 0);
|
|
rd_doload = ((boot_params.hdr.ram_size & RAMDISK_LOAD_FLAG) != 0);
|
|
#endif
|
|
#ifdef CONFIG_EFI
|
|
if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature,
|
|
#ifdef CONFIG_X86_32
|
|
"EL32",
|
|
#else
|
|
"EL64",
|
|
#endif
|
|
4)) {
|
|
efi_enabled = 1;
|
|
efi_reserve_early();
|
|
}
|
|
#endif
|
|
|
|
ARCH_SETUP
|
|
|
|
setup_memory_map();
|
|
parse_setup_data();
|
|
/* update the e820_saved too */
|
|
e820_reserve_setup_data();
|
|
|
|
copy_edd();
|
|
|
|
if (!boot_params.hdr.root_flags)
|
|
root_mountflags &= ~MS_RDONLY;
|
|
init_mm.start_code = (unsigned long) _text;
|
|
init_mm.end_code = (unsigned long) _etext;
|
|
init_mm.end_data = (unsigned long) _edata;
|
|
#ifdef CONFIG_X86_32
|
|
init_mm.brk = init_pg_tables_end + PAGE_OFFSET;
|
|
#else
|
|
init_mm.brk = (unsigned long) &_end;
|
|
#endif
|
|
|
|
code_resource.start = virt_to_phys(_text);
|
|
code_resource.end = virt_to_phys(_etext)-1;
|
|
data_resource.start = virt_to_phys(_etext);
|
|
data_resource.end = virt_to_phys(_edata)-1;
|
|
bss_resource.start = virt_to_phys(&__bss_start);
|
|
bss_resource.end = virt_to_phys(&__bss_stop)-1;
|
|
|
|
#ifdef CONFIG_CMDLINE_BOOL
|
|
#ifdef CONFIG_CMDLINE_OVERRIDE
|
|
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
|
|
#else
|
|
if (builtin_cmdline[0]) {
|
|
/* append boot loader cmdline to builtin */
|
|
strlcat(builtin_cmdline, " ", COMMAND_LINE_SIZE);
|
|
strlcat(builtin_cmdline, boot_command_line, COMMAND_LINE_SIZE);
|
|
strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
|
|
}
|
|
#endif
|
|
#endif
|
|
|
|
strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
|
|
*cmdline_p = command_line;
|
|
|
|
parse_early_param();
|
|
|
|
#ifdef CONFIG_X86_64
|
|
check_efer();
|
|
#endif
|
|
|
|
#if defined(CONFIG_VMI) && defined(CONFIG_X86_32)
|
|
/*
|
|
* Must be before kernel pagetables are setup
|
|
* or fixmap area is touched.
|
|
*/
|
|
vmi_init();
|
|
#endif
|
|
|
|
/* after early param, so could get panic from serial */
|
|
reserve_early_setup_data();
|
|
|
|
if (acpi_mps_check()) {
|
|
#ifdef CONFIG_X86_LOCAL_APIC
|
|
disable_apic = 1;
|
|
#endif
|
|
setup_clear_cpu_cap(X86_FEATURE_APIC);
|
|
}
|
|
|
|
#ifdef CONFIG_PCI
|
|
if (pci_early_dump_regs)
|
|
early_dump_pci_devices();
|
|
#endif
|
|
|
|
finish_e820_parsing();
|
|
|
|
dmi_scan_machine();
|
|
|
|
dmi_check_system(bad_bios_dmi_table);
|
|
|
|
#ifdef CONFIG_X86_32
|
|
probe_roms();
|
|
#endif
|
|
|
|
/* after parse_early_param, so could debug it */
|
|
insert_resource(&iomem_resource, &code_resource);
|
|
insert_resource(&iomem_resource, &data_resource);
|
|
insert_resource(&iomem_resource, &bss_resource);
|
|
|
|
if (efi_enabled)
|
|
efi_init();
|
|
|
|
#ifdef CONFIG_X86_32
|
|
if (ppro_with_ram_bug()) {
|
|
e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM,
|
|
E820_RESERVED);
|
|
sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map);
|
|
printk(KERN_INFO "fixed physical RAM map:\n");
|
|
e820_print_map("bad_ppro");
|
|
}
|
|
#else
|
|
early_gart_iommu_check();
|
|
#endif
|
|
|
|
/*
|
|
* partially used pages are not usable - thus
|
|
* we are rounding upwards:
|
|
*/
|
|
max_pfn = e820_end_of_ram_pfn();
|
|
|
|
/* preallocate 4k for mptable mpc */
|
|
early_reserve_e820_mpc_new();
|
|
/* update e820 for memory not covered by WB MTRRs */
|
|
mtrr_bp_init();
|
|
if (mtrr_trim_uncached_memory(max_pfn))
|
|
max_pfn = e820_end_of_ram_pfn();
|
|
|
|
#ifdef CONFIG_X86_32
|
|
/* max_low_pfn get updated here */
|
|
find_low_pfn_range();
|
|
#else
|
|
num_physpages = max_pfn;
|
|
|
|
if (cpu_has_x2apic)
|
|
check_x2apic();
|
|
|
|
/* How many end-of-memory variables you have, grandma! */
|
|
/* need this before calling reserve_initrd */
|
|
if (max_pfn > (1UL<<(32 - PAGE_SHIFT)))
|
|
max_low_pfn = e820_end_of_low_ram_pfn();
|
|
else
|
|
max_low_pfn = max_pfn;
|
|
|
|
high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1;
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION
|
|
setup_bios_corruption_check();
|
|
#endif
|
|
|
|
/* max_pfn_mapped is updated here */
|
|
max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
|
|
max_pfn_mapped = max_low_pfn_mapped;
|
|
|
|
#ifdef CONFIG_X86_64
|
|
if (max_pfn > max_low_pfn) {
|
|
max_pfn_mapped = init_memory_mapping(1UL<<32,
|
|
max_pfn<<PAGE_SHIFT);
|
|
/* can we preseve max_low_pfn ?*/
|
|
max_low_pfn = max_pfn;
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* NOTE: On x86-32, only from this point on, fixmaps are ready for use.
|
|
*/
|
|
|
|
#ifdef CONFIG_PROVIDE_OHCI1394_DMA_INIT
|
|
if (init_ohci1394_dma_early)
|
|
init_ohci1394_dma_on_all_controllers();
|
|
#endif
|
|
|
|
reserve_initrd();
|
|
|
|
#ifdef CONFIG_X86_64
|
|
vsmp_init();
|
|
#endif
|
|
|
|
io_delay_init();
|
|
|
|
/*
|
|
* Parse the ACPI tables for possible boot-time SMP configuration.
|
|
*/
|
|
acpi_boot_table_init();
|
|
|
|
early_acpi_boot_init();
|
|
|
|
#ifdef CONFIG_ACPI_NUMA
|
|
/*
|
|
* Parse SRAT to discover nodes.
|
|
*/
|
|
acpi_numa_init();
|
|
#endif
|
|
|
|
initmem_init(0, max_pfn);
|
|
|
|
#ifdef CONFIG_ACPI_SLEEP
|
|
/*
|
|
* Reserve low memory region for sleep support.
|
|
*/
|
|
acpi_reserve_bootmem();
|
|
#endif
|
|
#ifdef CONFIG_X86_FIND_SMP_CONFIG
|
|
/*
|
|
* Find and reserve possible boot-time SMP configuration:
|
|
*/
|
|
find_smp_config();
|
|
#endif
|
|
reserve_crashkernel();
|
|
|
|
#ifdef CONFIG_X86_64
|
|
/*
|
|
* dma32_reserve_bootmem() allocates bootmem which may conflict
|
|
* with the crashkernel command line, so do that after
|
|
* reserve_crashkernel()
|
|
*/
|
|
dma32_reserve_bootmem();
|
|
#endif
|
|
|
|
reserve_ibft_region();
|
|
|
|
#ifdef CONFIG_KVM_CLOCK
|
|
kvmclock_init();
|
|
#endif
|
|
|
|
paravirt_pagetable_setup_start(swapper_pg_dir);
|
|
paging_init();
|
|
paravirt_pagetable_setup_done(swapper_pg_dir);
|
|
paravirt_post_allocator_init();
|
|
|
|
#ifdef CONFIG_X86_64
|
|
map_vsyscall();
|
|
#endif
|
|
|
|
#ifdef CONFIG_X86_GENERICARCH
|
|
generic_apic_probe();
|
|
#endif
|
|
|
|
early_quirks();
|
|
|
|
/*
|
|
* Read APIC and some other early information from ACPI tables.
|
|
*/
|
|
acpi_boot_init();
|
|
|
|
#if defined(CONFIG_X86_MPPARSE) || defined(CONFIG_X86_VISWS)
|
|
/*
|
|
* get boot-time SMP configuration:
|
|
*/
|
|
if (smp_found_config)
|
|
get_smp_config();
|
|
#endif
|
|
|
|
prefill_possible_map();
|
|
|
|
#ifdef CONFIG_X86_64
|
|
init_cpu_to_node();
|
|
#endif
|
|
|
|
init_apic_mappings();
|
|
ioapic_init_mappings();
|
|
|
|
/* need to wait for io_apic is mapped */
|
|
nr_irqs = probe_nr_irqs();
|
|
|
|
kvm_guest_init();
|
|
|
|
e820_reserve_resources();
|
|
e820_mark_nosave_regions(max_low_pfn);
|
|
|
|
#ifdef CONFIG_X86_32
|
|
request_resource(&iomem_resource, &video_ram_resource);
|
|
#endif
|
|
reserve_standard_io_resources();
|
|
|
|
e820_setup_gap();
|
|
|
|
#ifdef CONFIG_VT
|
|
#if defined(CONFIG_VGA_CONSOLE)
|
|
if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
|
|
conswitchp = &vga_con;
|
|
#elif defined(CONFIG_DUMMY_CONSOLE)
|
|
conswitchp = &dummy_con;
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
|