diff options
Diffstat (limited to 'arch/x86/kernel/setup.c')
| -rw-r--r-- | arch/x86/kernel/setup.c | 962 |
1 files changed, 674 insertions, 288 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 9838f2539df..78a0e629892 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -27,12 +27,13 @@ #include <linux/screen_info.h> #include <linux/ioport.h> #include <linux/acpi.h> +#include <linux/sfi.h> #include <linux/apm_bios.h> #include <linux/initrd.h> #include <linux/bootmem.h> +#include <linux/memblock.h> #include <linux/seq_file.h> #include <linux/console.h> -#include <linux/mca.h> #include <linux/root_dev.h> #include <linux/highmem.h> #include <linux/module.h> @@ -48,13 +49,13 @@ #include <asm/pci-direct.h> #include <linux/init_ohci1394_dma.h> #include <linux/kvm_para.h> +#include <linux/dma-contiguous.h> #include <linux/errno.h> #include <linux/kernel.h> #include <linux/stddef.h> #include <linux/unistd.h> #include <linux/ptrace.h> -#include <linux/slab.h> #include <linux/user.h> #include <linux/delay.h> @@ -66,55 +67,81 @@ #include <linux/percpu.h> #include <linux/crash_dump.h> +#include <linux/tboot.h> +#include <linux/jiffies.h> #include <video/edid.h> #include <asm/mtrr.h> #include <asm/apic.h> +#include <asm/realmode.h> #include <asm/e820.h> #include <asm/mpspec.h> #include <asm/setup.h> -#include <asm/arch_hooks.h> #include <asm/efi.h> +#include <asm/timer.h> +#include <asm/i8259.h> #include <asm/sections.h> -#include <asm/dmi.h> #include <asm/io_apic.h> #include <asm/ist.h> -#include <asm/vmi.h> -#include <setup_arch.h> +#include <asm/setup_arch.h> #include <asm/bios_ebda.h> #include <asm/cacheflush.h> #include <asm/processor.h> #include <asm/bugs.h> -#include <asm/system.h> #include <asm/vsyscall.h> -#include <asm/smp.h> +#include <asm/cpu.h> #include <asm/desc.h> #include <asm/dma.h> #include <asm/iommu.h> +#include <asm/gart.h> #include <asm/mmu_context.h> #include <asm/proto.h> -#include <mach_apic.h> #include <asm/paravirt.h> +#include <asm/hypervisor.h> +#include <asm/olpc_ofw.h> #include <asm/percpu.h> #include <asm/topology.h> #include <asm/apicdef.h> -#ifdef CONFIG_X86_64 -#include <asm/numa_64.h> +#include <asm/amd_nb.h> +#include <asm/mce.h> +#include <asm/alternative.h> +#include <asm/prom.h> + +/* + * max_low_pfn_mapped: highest direct mapped pfn under 4GB + * max_pfn_mapped: highest direct mapped pfn over 4GB + * + * The direct mapping only covers E820_RAM regions, so the ranges and gaps are + * represented by pfn_mapped + */ +unsigned long max_low_pfn_mapped; +unsigned long max_pfn_mapped; + +#ifdef CONFIG_DMI +RESERVE_BRK(dmi_alloc, 65536); #endif -#ifndef ARCH_SETUP -#define ARCH_SETUP + +static __initdata unsigned long _brk_start = (unsigned long)__brk_base; +unsigned long _brk_end = (unsigned long)__brk_base; + +#ifdef CONFIG_X86_64 +int default_cpu_present_to_apicid(int mps_cpu) +{ + return __default_cpu_present_to_apicid(mps_cpu); +} + +int default_check_phys_apicid_present(int phys_apicid) +{ + return __default_check_phys_apicid_present(phys_apicid); +} #endif -#ifndef CONFIG_DEBUG_BOOT_PARAMS -struct boot_params __initdata boot_params; -#else struct boot_params boot_params; -#endif /* * Machine setup.. @@ -142,30 +169,15 @@ static struct resource bss_resource = { #ifdef CONFIG_X86_32 -/* This value is set up by the early boot code to point to the value - immediately after the boot time page tables. It contains a *physical* - address, and must not be in the .bss segment! */ -unsigned long init_pg_tables_start __initdata = ~0UL; -unsigned long init_pg_tables_end __initdata = ~0UL; - -static struct resource video_ram_resource = { - .name = "Video RAM area", - .start = 0xa0000, - .end = 0xbffff, - .flags = IORESOURCE_BUSY | IORESOURCE_MEM -}; - /* cpu data as detected by the assembly code in head.S */ -struct cpuinfo_x86 new_cpu_data __cpuinitdata = {0, 0, 0, 0, -1, 1, 0, 0, -1}; +struct cpuinfo_x86 new_cpu_data = { + .wp_works_ok = -1, +}; /* common cpu data for all cpus */ -struct cpuinfo_x86 boot_cpu_data __read_mostly = {0, 0, 0, 0, -1, 1, 0, 0, -1}; +struct cpuinfo_x86 boot_cpu_data __read_mostly = { + .wp_works_ok = -1, +}; EXPORT_SYMBOL(boot_cpu_data); -static void set_mca_bus(int x) -{ -#ifdef CONFIG_MCA - MCA_bus = x; -#endif -} unsigned int def_to_bigsmp; @@ -186,25 +198,21 @@ struct ist_info ist_info; #endif #else -struct cpuinfo_x86 boot_cpu_data __read_mostly; +struct cpuinfo_x86 boot_cpu_data __read_mostly = { + .x86_phys_bits = MAX_PHYSMEM_BITS, +}; EXPORT_SYMBOL(boot_cpu_data); #endif #if !defined(CONFIG_X86_PAE) || defined(CONFIG_X86_64) -unsigned long mmu_cr4_features; +__visible unsigned long mmu_cr4_features; #else -unsigned long mmu_cr4_features = X86_CR4_PAE; +__visible unsigned long mmu_cr4_features = X86_CR4_PAE; #endif -/* Boot loader ID as an integer, for the benefit of proc_dointvec */ -int bootloader_type; - -/* - * Early DMI memory - */ -int dmi_alloc_index; -char dmi_alloc_data[DMI_MAX_DATA]; +/* Boot loader ID and version as integers, for the benefit of proc_dointvec */ +int bootloader_type, bootloader_version; /* * Setup options @@ -223,6 +231,9 @@ unsigned long saved_video_mode; #define RAMDISK_LOAD_FLAG 0x4000 static char __initdata command_line[COMMAND_LINE_SIZE]; +#ifdef CONFIG_CMDLINE_BOOL +static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; +#endif #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) struct edd edd; @@ -234,7 +245,7 @@ EXPORT_SYMBOL(edd); * from boot_params into a safe place. * */ -static inline void copy_edd(void) +static inline void __init copy_edd(void) { memcpy(edd.mbr_signature, boot_params.edd_mbr_sig_buffer, sizeof(edd.mbr_signature)); @@ -243,85 +254,139 @@ static inline void copy_edd(void) edd.edd_info_nr = boot_params.eddbuf_entries; } #else -static inline void copy_edd(void) +static inline void __init copy_edd(void) { } #endif -#ifdef CONFIG_BLK_DEV_INITRD +void * __init extend_brk(size_t size, size_t align) +{ + size_t mask = align - 1; + void *ret; + + BUG_ON(_brk_start == 0); + BUG_ON(align & mask); + + _brk_end = (_brk_end + mask) & ~mask; + BUG_ON((char *)(_brk_end + size) > __brk_limit); + + ret = (void *)_brk_end; + _brk_end += size; + + memset(ret, 0, size); + + return ret; +} #ifdef CONFIG_X86_32 +static void __init cleanup_highmap(void) +{ +} +#endif -#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) -static void __init relocate_initrd(void) +static void __init reserve_brk(void) { + if (_brk_end > _brk_start) + memblock_reserve(__pa_symbol(_brk_start), + _brk_end - _brk_start); + /* Mark brk area as locked down and no longer taking any + new allocations */ + _brk_start = 0; +} + +u64 relocated_ramdisk; + +#ifdef CONFIG_BLK_DEV_INITRD + +static u64 __init get_ramdisk_image(void) +{ u64 ramdisk_image = boot_params.hdr.ramdisk_image; - u64 ramdisk_size = boot_params.hdr.ramdisk_size; - u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; - u64 ramdisk_here; + + ramdisk_image |= (u64)boot_params.ext_ramdisk_image << 32; + + return ramdisk_image; +} +static u64 __init get_ramdisk_size(void) +{ + u64 ramdisk_size = boot_params.hdr.ramdisk_size; + + ramdisk_size |= (u64)boot_params.ext_ramdisk_size << 32; + + return ramdisk_size; +} + +#define MAX_MAP_CHUNK (NR_FIX_BTMAPS << PAGE_SHIFT) +static void __init relocate_initrd(void) +{ + /* Assume only end is not page aligned */ + u64 ramdisk_image = get_ramdisk_image(); + u64 ramdisk_size = get_ramdisk_size(); + u64 area_size = PAGE_ALIGN(ramdisk_size); unsigned long slop, clen, mapaddr; char *p, *q; - /* We need to move the initrd down into lowmem */ - ramdisk_here = find_e820_area(0, end_of_lowmem, ramdisk_size, - PAGE_SIZE); + /* We need to move the initrd down into directly mapped mem */ + relocated_ramdisk = memblock_find_in_range(0, PFN_PHYS(max_pfn_mapped), + area_size, PAGE_SIZE); - if (ramdisk_here == -1ULL) + if (!relocated_ramdisk) panic("Cannot find place for new RAMDISK of size %lld\n", - ramdisk_size); + ramdisk_size); - /* Note: this includes all the lowmem currently occupied by + /* Note: this includes all the mem currently occupied by the initrd, we rely on that fact to keep the data intact. */ - reserve_early(ramdisk_here, ramdisk_here + ramdisk_size, - "NEW RAMDISK"); - initrd_start = ramdisk_here + PAGE_OFFSET; + memblock_reserve(relocated_ramdisk, area_size); + initrd_start = relocated_ramdisk + PAGE_OFFSET; initrd_end = initrd_start + ramdisk_size; - printk(KERN_INFO "Allocated new RAMDISK: %08llx - %08llx\n", - ramdisk_here, ramdisk_here + ramdisk_size); + printk(KERN_INFO "Allocated new RAMDISK: [mem %#010llx-%#010llx]\n", + relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); q = (char *)initrd_start; - /* Copy any lowmem portion of the initrd */ - if (ramdisk_image < end_of_lowmem) { - clen = end_of_lowmem - ramdisk_image; - p = (char *)__va(ramdisk_image); - memcpy(q, p, clen); - q += clen; - ramdisk_image += clen; - ramdisk_size -= clen; - } - - /* Copy the highmem portion of the initrd */ + /* Copy the initrd */ while (ramdisk_size) { slop = ramdisk_image & ~PAGE_MASK; clen = ramdisk_size; if (clen > MAX_MAP_CHUNK-slop) clen = MAX_MAP_CHUNK-slop; mapaddr = ramdisk_image & PAGE_MASK; - p = early_ioremap(mapaddr, clen+slop); + p = early_memremap(mapaddr, clen+slop); memcpy(q, p+slop, clen); early_iounmap(p, clen+slop); q += clen; ramdisk_image += clen; ramdisk_size -= clen; } - /* high pages is not converted by early_res_to_bootmem */ - ramdisk_image = boot_params.hdr.ramdisk_image; - ramdisk_size = boot_params.hdr.ramdisk_size; - printk(KERN_INFO "Move RAMDISK from %016llx - %016llx to" - " %08llx - %08llx\n", + + ramdisk_image = get_ramdisk_image(); + ramdisk_size = get_ramdisk_size(); + printk(KERN_INFO "Move RAMDISK from [mem %#010llx-%#010llx] to" + " [mem %#010llx-%#010llx]\n", ramdisk_image, ramdisk_image + ramdisk_size - 1, - ramdisk_here, ramdisk_here + ramdisk_size - 1); + relocated_ramdisk, relocated_ramdisk + ramdisk_size - 1); } -#endif +static void __init early_reserve_initrd(void) +{ + /* Assume only end is not page aligned */ + u64 ramdisk_image = get_ramdisk_image(); + u64 ramdisk_size = get_ramdisk_size(); + u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); + + if (!boot_params.hdr.type_of_loader || + !ramdisk_image || !ramdisk_size) + return; /* No initrd provided by bootloader */ + + memblock_reserve(ramdisk_image, ramdisk_end - ramdisk_image); +} static void __init reserve_initrd(void) { - u64 ramdisk_image = boot_params.hdr.ramdisk_image; - u64 ramdisk_size = boot_params.hdr.ramdisk_size; - u64 ramdisk_end = ramdisk_image + ramdisk_size; - u64 end_of_lowmem = max_low_pfn << PAGE_SHIFT; + /* Assume only end is not page aligned */ + u64 ramdisk_image = get_ramdisk_image(); + u64 ramdisk_size = get_ramdisk_size(); + u64 ramdisk_end = PAGE_ALIGN(ramdisk_image + ramdisk_size); + u64 mapped_size; if (!boot_params.hdr.type_of_loader || !ramdisk_image || !ramdisk_size) @@ -329,39 +394,31 @@ static void __init reserve_initrd(void) initrd_start = 0; - if (ramdisk_size >= (end_of_lowmem>>1)) { - free_early(ramdisk_image, ramdisk_end); - printk(KERN_ERR "initrd too large to handle, " - "disabling initrd\n"); - return; - } + mapped_size = memblock_mem_size(max_pfn_mapped); + if (ramdisk_size >= (mapped_size>>1)) + panic("initrd too large to handle, " + "disabling initrd (%lld needed, %lld available)\n", + ramdisk_size, mapped_size>>1); - printk(KERN_INFO "RAMDISK: %08llx - %08llx\n", ramdisk_image, - ramdisk_end); + printk(KERN_INFO "RAMDISK: [mem %#010llx-%#010llx]\n", ramdisk_image, + ramdisk_end - 1); - - if (ramdisk_end <= end_of_lowmem) { - /* All in lowmem, easy case */ - /* - * don't need to reserve again, already reserved early - * in i386_start_kernel - */ + if (pfn_range_is_mapped(PFN_DOWN(ramdisk_image), + PFN_DOWN(ramdisk_end))) { + /* All are mapped, easy case */ initrd_start = ramdisk_image + PAGE_OFFSET; initrd_end = initrd_start + ramdisk_size; return; } -#ifdef CONFIG_X86_32 relocate_initrd(); -#else - printk(KERN_ERR "initrd extends beyond end of memory " - "(0x%08llx > 0x%08llx)\ndisabling initrd\n", - ramdisk_end, end_of_lowmem); - initrd_start = 0; -#endif - free_early(ramdisk_image, ramdisk_end); + + memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); } #else +static void __init early_reserve_initrd(void) +{ +} static void __init reserve_initrd(void) { } @@ -370,22 +427,34 @@ static void __init reserve_initrd(void) static void __init parse_setup_data(void) { struct setup_data *data; - u64 pa_data; + u64 pa_data, pa_next; - if (boot_params.hdr.version < 0x0209) - return; pa_data = boot_params.hdr.setup_data; while (pa_data) { - data = early_ioremap(pa_data, PAGE_SIZE); - switch (data->type) { + u32 data_len, map_len, data_type; + + map_len = max(PAGE_SIZE - (pa_data & ~PAGE_MASK), + (u64)sizeof(struct setup_data)); + data = early_memremap(pa_data, map_len); + data_len = data->len + sizeof(struct setup_data); + data_type = data->type; + pa_next = data->next; + early_iounmap(data, map_len); + + switch (data_type) { case SETUP_E820_EXT: - parse_e820_ext(data, pa_data); + parse_e820_ext(pa_data, data_len); + break; + case SETUP_DTB: + add_dtb(pa_data); + break; + case SETUP_EFI: + parse_efi_setup(pa_data, data_len); break; default: break; } - pa_data = data->next; - early_iounmap(data, PAGE_SIZE); + pa_data = pa_next; } } @@ -395,11 +464,9 @@ static void __init e820_reserve_setup_data(void) u64 pa_data; int found = 0; - if (boot_params.hdr.version < 0x0209) - return; pa_data = boot_params.hdr.setup_data; while (pa_data) { - data = early_ioremap(pa_data, sizeof(*data)); + data = early_memremap(pa_data, sizeof(*data)); e820_update_range(pa_data, sizeof(*data)+data->len, E820_RAM, E820_RESERVED_KERN); found = 1; @@ -415,19 +482,15 @@ static void __init e820_reserve_setup_data(void) e820_print_map("reserve setup_data"); } -static void __init reserve_early_setup_data(void) +static void __init memblock_x86_reserve_range_setup_data(void) { struct setup_data *data; u64 pa_data; - char buf[32]; - if (boot_params.hdr.version < 0x0209) - return; pa_data = boot_params.hdr.setup_data; while (pa_data) { - data = early_ioremap(pa_data, sizeof(*data)); - sprintf(buf, "setup data %x", data->type); - reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); + data = early_memremap(pa_data, sizeof(*data)); + memblock_reserve(pa_data, sizeof(*data) + data->len); pa_data = data->next; early_iounmap(data, sizeof(*data)); } @@ -439,75 +502,118 @@ static void __init reserve_early_setup_data(void) #ifdef CONFIG_KEXEC -/** - * Reserve @size bytes of crashkernel memory at any suitable offset. - * - * @size: Size of the crashkernel memory to reserve. - * Returns the base address on success, and -1ULL on failure. +/* + * Keep the crash kernel below this limit. On 32 bits earlier kernels + * would limit the kernel to the low 512 MiB due to mapping restrictions. + * On 64bit, old kexec-tools need to under 896MiB. */ -unsigned long long __init find_and_reserve_crashkernel(unsigned long long size) +#ifdef CONFIG_X86_32 +# define CRASH_KERNEL_ADDR_LOW_MAX (512 << 20) +# define CRASH_KERNEL_ADDR_HIGH_MAX (512 << 20) +#else +# define CRASH_KERNEL_ADDR_LOW_MAX (896UL<<20) +# define CRASH_KERNEL_ADDR_HIGH_MAX MAXMEM +#endif + +static void __init reserve_crashkernel_low(void) { - const unsigned long long alignment = 16<<20; /* 16M */ - unsigned long long start = 0LL; +#ifdef CONFIG_X86_64 + const unsigned long long alignment = 16<<20; /* 16M */ + unsigned long long low_base = 0, low_size = 0; + unsigned long total_low_mem; + unsigned long long base; + bool auto_set = false; + int ret; - while (1) { - int ret; + total_low_mem = memblock_mem_size(1UL<<(32-PAGE_SHIFT)); + /* crashkernel=Y,low */ + ret = parse_crashkernel_low(boot_command_line, total_low_mem, + &low_size, &base); + if (ret != 0) { + /* + * two parts from lib/swiotlb.c: + * swiotlb size: user specified with swiotlb= or default. + * swiotlb overflow buffer: now is hardcoded to 32k. + * We round it to 8M for other buffers that + * may need to stay low too. + */ + low_size = swiotlb_size_or_default() + (8UL<<20); + auto_set = true; + } else { + /* passed with crashkernel=0,low ? */ + if (!low_size) + return; + } - start = find_e820_area(start, ULONG_MAX, size, alignment); - if (start == -1ULL) - return start; + low_base = memblock_find_in_range(low_size, (1ULL<<32), + low_size, alignment); - /* try to reserve it */ - ret = reserve_bootmem_generic(start, size, BOOTMEM_EXCLUSIVE); - if (ret >= 0) - return start; + if (!low_base) { + if (!auto_set) + pr_info("crashkernel low reservation failed - No suitable area found.\n"); - start += alignment; + return; } -} -static inline unsigned long long get_total_mem(void) -{ - unsigned long long total; - - total = max_low_pfn - min_low_pfn; -#ifdef CONFIG_HIGHMEM - total += highend_pfn - highstart_pfn; + memblock_reserve(low_base, low_size); + pr_info("Reserving %ldMB of low memory at %ldMB for crashkernel (System low RAM: %ldMB)\n", + (unsigned long)(low_size >> 20), + (unsigned long)(low_base >> 20), + (unsigned long)(total_low_mem >> 20)); + crashk_low_res.start = low_base; + crashk_low_res.end = low_base + low_size - 1; + insert_resource(&iomem_resource, &crashk_low_res); #endif - - return total << PAGE_SHIFT; } static void __init reserve_crashkernel(void) { + const unsigned long long alignment = 16<<20; /* 16M */ unsigned long long total_mem; unsigned long long crash_size, crash_base; + bool high = false; int ret; - total_mem = get_total_mem(); + total_mem = memblock_phys_mem_size(); + /* crashkernel=XM */ ret = parse_crashkernel(boot_command_line, total_mem, &crash_size, &crash_base); - if (ret != 0 || crash_size <= 0) - return; + if (ret != 0 || crash_size <= 0) { + /* crashkernel=X,high */ + ret = parse_crashkernel_high(boot_command_line, total_mem, + &crash_size, &crash_base); + if (ret != 0 || crash_size <= 0) + return; + high = true; + } /* 0 means: find the address automatically */ if (crash_base <= 0) { - crash_base = find_and_reserve_crashkernel(crash_size); - if (crash_base == -1ULL) { - pr_info("crashkernel reservation failed. " - "No suitable area found.\n"); + /* + * kexec want bzImage is below CRASH_KERNEL_ADDR_MAX + */ + crash_base = memblock_find_in_range(alignment, + high ? CRASH_KERNEL_ADDR_HIGH_MAX : + CRASH_KERNEL_ADDR_LOW_MAX, + crash_size, alignment); + + if (!crash_base) { + pr_info("crashkernel reservation failed - No suitable area found.\n"); return; } + } else { - ret = reserve_bootmem_generic(crash_base, crash_size, - BOOTMEM_EXCLUSIVE); - if (ret < 0) { - pr_info("crashkernel reservation failed - " - "memory is in use\n"); + unsigned long long start; + + start = memblock_find_in_range(crash_base, + crash_base + crash_size, crash_size, 1<<20); + if (start != crash_base) { + pr_info("crashkernel reservation failed - memory is in use.\n"); return; } } + memblock_reserve(crash_base, crash_size); printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " "for crashkernel (System RAM: %ldMB)\n", @@ -518,6 +624,9 @@ static void __init reserve_crashkernel(void) crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; insert_resource(&iomem_resource, &crashk_res); + + if (crash_base >= (1ULL<<32)) + reserve_crashkernel_low(); } #else static void __init reserve_crashkernel(void) @@ -548,7 +657,7 @@ static struct resource standard_io_resources[] = { .flags = IORESOURCE_BUSY | IORESOURCE_IO } }; -static void __init reserve_standard_io_resources(void) +void __init reserve_standard_io_resources(void) { int i; @@ -558,25 +667,179 @@ static void __init reserve_standard_io_resources(void) } -#ifdef CONFIG_PROC_VMCORE -/* 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 __init void reserve_ibft_region(void) +{ + unsigned long addr, size = 0; + + addr = find_ibft_region(&size); + + if (size) + memblock_reserve(addr, size); +} + +static bool __init snb_gfx_workaround_needed(void) +{ +#ifdef CONFIG_PCI + int i; + u16 vendor, devid; + static const __initconst u16 snb_ids[] = { + 0x0102, + 0x0112, + 0x0122, + 0x0106, + 0x0116, + 0x0126, + 0x010a, + }; + + /* Assume no if something weird is going on with PCI */ + if (!early_pci_allowed()) + return false; + + vendor = read_pci_config_16(0, 2, 0, PCI_VENDOR_ID); + if (vendor != 0x8086) + return false; + + devid = read_pci_config_16(0, 2, 0, PCI_DEVICE_ID); + for (i = 0; i < ARRAY_SIZE(snb_ids); i++) + if (devid == snb_ids[i]) + return true; +#endif + + return false; +} + +/* + * Sandy Bridge graphics has trouble with certain ranges, exclude + * them from allocation. */ -static int __init setup_elfcorehdr(char *arg) +static void __init trim_snb_memory(void) { - char *end; - if (!arg) + static const __initconst unsigned long bad_pages[] = { + 0x20050000, + 0x20110000, + 0x20130000, + 0x20138000, + 0x40004000, + }; + int i; + + if (!snb_gfx_workaround_needed()) + return; + + printk(KERN_DEBUG "reserving inaccessible SNB gfx pages\n"); + + /* + * Reserve all memory below the 1 MB mark that has not + * already been reserved. + */ + memblock_reserve(0, 1<<20); + + for (i = 0; i < ARRAY_SIZE(bad_pages); i++) { + if (memblock_reserve(bad_pages[i], PAGE_SIZE)) + printk(KERN_WARNING "failed to reserve 0x%08lx\n", + bad_pages[i]); + } +} + +/* + * Here we put platform-specific memory range workarounds, i.e. + * memory known to be corrupt or otherwise in need to be reserved on + * specific platforms. + * + * If this gets used more widely it could use a real dispatch mechanism. + */ +static void __init trim_platform_memory_ranges(void) +{ + trim_snb_memory(); +} + +static void __init trim_bios_range(void) +{ + /* + * A special case is the first 4Kb of memory; + * This is a BIOS owned area, not kernel ram, but generally + * not listed as such in the E820 table. + * + * This typically reserves additional memory (64KiB by default) + * since some BIOSes are known to corrupt low memory. See the + * Kconfig help text for X86_RESERVE_LOW. + */ + e820_update_range(0, PAGE_SIZE, E820_RAM, E820_RESERVED); + + /* + * special case: Some BIOSen report the PC BIOS + * area (640->1Mb) as ram even though it is not. + * take them out. + */ + e820_remove_range(BIOS_BEGIN, BIOS_END - BIOS_BEGIN, E820_RAM, 1); + + sanitize_e820_map(e820.map, ARRAY_SIZE(e820.map), &e820.nr_map); +} + +/* called before trim_bios_range() to spare extra sanitize */ +static void __init e820_add_kernel_range(void) +{ + u64 start = __pa_symbol(_text); + u64 size = __pa_symbol(_end) - start; + + /* + * Complain if .text .data and .bss are not marked as E820_RAM and + * attempt to fix it by adding the range. We may have a confused BIOS, + * or the user may have used memmap=exactmap or memmap=xxM$yyM to + * exclude kernel range. If we really are running on top non-RAM, + * we will crash later anyways. + */ + if (e820_all_mapped(start, start + size, E820_RAM)) + return; + + pr_warn(".text .data .bss are not marked as E820_RAM!\n"); + e820_remove_range(start, size, E820_RAM, 0); + e820_add_region(start, size, E820_RAM); +} + +static unsigned reserve_low = CONFIG_X86_RESERVE_LOW << 10; + +static int __init parse_reservelow(char *p) +{ + unsigned long long size; + + if (!p) return -EINVAL; - elfcorehdr_addr = memparse(arg, &end); - return end > arg ? 0 : -EINVAL; + + size = memparse(p, &p); + + if (size < 4096) + size = 4096; + + if (size > 640*1024) + size = 640*1024; + + reserve_low = size; + + return 0; } -early_param("elfcorehdr", setup_elfcorehdr); -#endif -static struct x86_quirks default_x86_quirks __initdata; +early_param("reservelow", parse_reservelow); -struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; +static void __init trim_low_memory_range(void) +{ + memblock_reserve(0, ALIGN(reserve_low, PAGE_SIZE)); +} + +/* + * Dump out kernel offset information on panic. + */ +static int +dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p) +{ + pr_emerg("Kernel Offset: 0x%lx from 0x%lx " + "(relocation range: 0x%lx-0x%lx)\n", + (unsigned long)&_text - __START_KERNEL, __START_KERNEL, + __START_KERNEL_map, MODULES_VADDR-1); + + return 0; +} /* * Determine if we were loaded by an EFI loader. If so, then we have also been @@ -593,17 +856,46 @@ struct x86_quirks *x86_quirks __initdata = &default_x86_quirks; void __init setup_arch(char **cmdline_p) { + memblock_reserve(__pa_symbol(_text), + (unsigned long)__bss_stop - (unsigned long)_text); + + early_reserve_initrd(); + + /* + * 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. + */ + #ifdef CONFIG_X86_32 memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data)); - visws_early_detect(); - pre_setup_arch_hook(); + + /* + * copy kernel address range established so far and switch + * to the proper swapper page table + */ + clone_pgd_range(swapper_pg_dir + KERNEL_PGD_BOUNDARY, + initial_page_table + KERNEL_PGD_BOUNDARY, + KERNEL_PGD_PTRS); + + load_cr3(swapper_pg_dir); + __flush_tlb_all(); #else printk(KERN_INFO "Command line: %s\n", boot_command_line); #endif + /* + * If we have OLPC OFW, we might end up relocating the fixmap due to + * reserve_top(), so do this before touching the ioremap area. + */ + olpc_ofw_detect(); + + early_trap_init(); early_cpu_init(); early_ioremap_init(); + setup_olpc_ofw_pgd(); + ROOT_DEV = old_decode_dev(boot_params.hdr.root_dev); screen_info = boot_params.screen_info; edid_info = boot_params.edid_info; @@ -611,7 +903,6 @@ void __init setup_arch(char **cmdline_p) 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]; @@ -619,6 +910,12 @@ void __init setup_arch(char **cmdline_p) #endif saved_video_mode = boot_params.hdr.vid_mode; bootloader_type = boot_params.hdr.type_of_loader; + if ((bootloader_type >> 4) == 0xe) { + bootloader_type &= 0xf; + bootloader_type |= (boot_params.hdr.ext_loader_type+0x10) << 4; + } + bootloader_version = bootloader_type & 0xf; + bootloader_version |= boot_params.hdr.ext_loader_ver << 4; #ifdef CONFIG_BLK_DEV_RAM rd_image_start = boot_params.hdr.ram_size & RAMDISK_IMAGE_START_MASK; @@ -627,23 +924,23 @@ void __init setup_arch(char **cmdline_p) #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(); + "EL32", 4)) { + set_bit(EFI_BOOT, &efi.flags); + } else if (!strncmp((char *)&boot_params.efi_info.efi_loader_signature, + "EL64", 4)) { + set_bit(EFI_BOOT, &efi.flags); + set_bit(EFI_64BIT, &efi.flags); } + + if (efi_enabled(EFI_BOOT)) + efi_memblock_x86_reserve_range(); #endif - ARCH_SETUP + x86_init.oem.arch_setup(); + iomem_resource.end = (1ULL << boot_cpu_data.x86_phys_bits) - 1; setup_memory_map(); parse_setup_data(); - /* update the e820_saved too */ - e820_reserve_setup_data(); copy_edd(); @@ -652,38 +949,46 @@ void __init setup_arch(char **cmdline_p) 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; + init_mm.brk = _brk_end; + + code_resource.start = __pa_symbol(_text); + code_resource.end = __pa_symbol(_etext)-1; + data_resource.start = __pa_symbol(_etext); + data_resource.end = __pa_symbol(_edata)-1; + bss_resource.start = __pa_symbol(__bss_start); + bss_resource.end = __pa_symbol(__bss_stop)-1; + +#ifdef CONFIG_CMDLINE_BOOL +#ifdef CONFIG_CMDLINE_OVERRIDE + strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); #else - init_mm.brk = (unsigned long) &_end; + 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 - - 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; 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. + * x86_configure_nx() is called before parse_early_param() to detect + * whether hardware doesn't support NX (so that the early EHCI debug + * console setup can safely call set_fixmap()). It may then be called + * again from within noexec_setup() during parsing early parameters + * to honor the respective command line option. */ - vmi_init(); -#endif + x86_configure_nx(); + + parse_early_param(); + + x86_report_nx(); /* after early param, so could get panic from serial */ - reserve_early_setup_data(); + memblock_x86_reserve_range_setup_data(); if (acpi_mps_check()) { #ifdef CONFIG_X86_LOCAL_APIC @@ -697,20 +1002,32 @@ void __init setup_arch(char **cmdline_p) early_dump_pci_devices(); #endif + /* update the e820_saved too */ + e820_reserve_setup_data(); finish_e820_parsing(); -#ifdef CONFIG_X86_32 - probe_roms(); -#endif + if (efi_enabled(EFI_BOOT)) + efi_init(); + + dmi_scan_machine(); + dmi_memdev_walk(); + dmi_set_dump_stack_arch_desc(); + + /* + * VMware detection requires dmi to be available, so this + * needs to be done after dmi_scan_machine, for the BP. + */ + init_hypervisor_platform(); + + x86_init.resources.probe_roms(); /* 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(); - + e820_add_kernel_range(); + trim_bios_range(); #ifdef CONFIG_X86_32 if (ppro_with_ram_bug()) { e820_update_range(0x70000000ULL, 0x40000ULL, E820_RAM, @@ -729,8 +1046,6 @@ void __init setup_arch(char **cmdline_p) */ 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)) @@ -740,8 +1055,7 @@ void __init setup_arch(char **cmdline_p) /* max_low_pfn get updated here */ find_low_pfn_range(); #else - num_physpages = max_pfn; - + check_x2apic(); /* How many end-of-memory variables you have, grandma! */ /* need this before calling reserve_initrd */ @@ -753,19 +1067,60 @@ void __init setup_arch(char **cmdline_p) high_memory = (void *)__va(max_pfn * PAGE_SIZE - 1) + 1; #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; + /* + * Find and reserve possible boot-time SMP configuration: + */ + find_smp_config(); -#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; - } + reserve_ibft_region(); + + early_alloc_pgt_buf(); + + /* + * Need to conclude brk, before memblock_x86_fill() + * it could use memblock_find_in_range, could overlap with + * brk area. + */ + reserve_brk(); + + cleanup_highmap(); + + memblock_set_current_limit(ISA_END_ADDRESS); + memblock_x86_fill(); + + /* + * The EFI specification says that boot service code won't be called + * after ExitBootServices(). This is, in fact, a lie. + */ + if (efi_enabled(EFI_MEMMAP)) + efi_reserve_boot_services(); + + /* preallocate 4k for mptable mpc */ + early_reserve_e820_mpc_new(); + +#ifdef CONFIG_X86_CHECK_BIOS_CORRUPTION + setup_bios_corruption_check(); +#endif + +#ifdef CONFIG_X86_32 + printk(KERN_DEBUG "initial memory mapped: [mem 0x00000000-%#010lx]\n", + (max_pfn_mapped<<PAGE_SHIFT) - 1); #endif + reserve_real_mode(); + + trim_platform_memory_ranges(); + trim_low_memory_range(); + + init_mem_mapping(); + + early_trap_pf_init(); + + setup_real_mode(); + + memblock_set_current_limit(get_max_mapped()); + dma_contiguous_reserve(max_pfn_mapped << PAGE_SHIFT); + /* * NOTE: On x86-32, only from this point on, fixmaps are ready for use. */ @@ -774,14 +1129,16 @@ void __init setup_arch(char **cmdline_p) if (init_ohci1394_dma_early) init_ohci1394_dma_on_all_controllers(); #endif + /* Allocate bigger log buffer */ + setup_log_buf(1); reserve_initrd(); -#ifdef CONFIG_X86_64 - vsmp_init(); +#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD) + acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start); #endif - dmi_scan_machine(); + vsmp_init(); io_delay_init(); @@ -790,56 +1147,45 @@ void __init setup_arch(char **cmdline_p) */ acpi_boot_table_init(); -#ifdef CONFIG_ACPI_NUMA - /* - * Parse SRAT to discover nodes. - */ - acpi_numa_init(); -#endif + early_acpi_boot_init(); - initmem_init(0, max_pfn); + initmem_init(); -#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: + * Reserve memory for crash kernel after SRAT is parsed so that it + * won't consume hotpluggable memory. */ - 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(); + memblock_find_dma_reserve(); + +#ifdef CONFIG_KVM_GUEST + kvmclock_init(); #endif - reserve_ibft_region(); + x86_init.paging.pagetable_init(); -#ifdef CONFIG_KVM_CLOCK - kvmclock_init(); + if (boot_cpu_data.cpuid_level >= 0) { + /* A CPU has %cr4 if and only if it has CPUID */ + mmu_cr4_features = read_cr4(); + if (trampoline_cr4_features) + *trampoline_cr4_features = mmu_cr4_features; + } + +#ifdef CONFIG_X86_32 + /* sync back kernel address range */ + clone_pgd_range(initial_page_table + KERNEL_PGD_BOUNDARY, + swapper_pg_dir + KERNEL_PGD_BOUNDARY, + KERNEL_PGD_PTRS); #endif - paravirt_pagetable_setup_start(swapper_pg_dir); - paging_init(); - paravirt_pagetable_setup_done(swapper_pg_dir); - paravirt_post_allocator_init(); + tboot_probe(); #ifdef CONFIG_X86_64 map_vsyscall(); #endif -#ifdef CONFIG_X86_GENERICARCH generic_apic_probe(); -#endif early_quirks(); @@ -847,41 +1193,81 @@ void __init setup_arch(char **cmdline_p) * Read APIC and some other early information from ACPI tables. */ acpi_boot_init(); + sfi_init(); + x86_dtb_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(); + if (x86_io_apic_ops.init) + x86_io_apic_ops.init(); 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(); + x86_init.resources.reserve_resources(); e820_setup_gap(); #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) - if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) + if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY)) conswitchp = &vga_con; #elif defined(CONFIG_DUMMY_CONSOLE) conswitchp = &dummy_con; #endif #endif + x86_init.oem.banner(); + + x86_init.timers.wallclock_init(); + + mcheck_init(); + + arch_init_ideal_nops(); + + register_refined_jiffies(CLOCK_TICK_RATE); + +#ifdef CONFIG_EFI + if (efi_enabled(EFI_BOOT)) + efi_apply_memmap_quirks(); +#endif +} + +#ifdef CONFIG_X86_32 + +static struct resource video_ram_resource = { + .name = "Video RAM area", + .start = 0xa0000, + .end = 0xbffff, + .flags = IORESOURCE_BUSY | IORESOURCE_MEM +}; + +void __init i386_reserve_resources(void) +{ + request_resource(&iomem_resource, &video_ram_resource); + reserve_standard_io_resources(); +} + +#endif /* CONFIG_X86_32 */ + +static struct notifier_block kernel_offset_notifier = { + .notifier_call = dump_kernel_offset +}; + +static int __init register_kernel_offset_dumper(void) +{ + atomic_notifier_chain_register(&panic_notifier_list, + &kernel_offset_notifier); + return 0; } +__initcall(register_kernel_offset_dumper); |