diff options
Diffstat (limited to 'arch/x86/kernel/setup.c')
| -rw-r--r-- | arch/x86/kernel/setup.c | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 2367ae07eb76..98c9cd6f3b5d 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -36,7 +36,7 @@ #include <linux/console.h> #include <linux/root_dev.h> #include <linux/highmem.h> -#include <linux/module.h> +#include <linux/export.h> #include <linux/efi.h> #include <linux/init.h> #include <linux/edd.h> @@ -113,6 +113,7 @@ #include <asm/prom.h> #include <asm/microcode.h> #include <asm/mmu_context.h> +#include <asm/kaslr.h> /* * max_low_pfn_mapped: highest direct mapped pfn under 4GB @@ -398,6 +399,7 @@ static void __init reserve_initrd(void) memblock_free(ramdisk_image, ramdisk_end - ramdisk_image); } + #else static void __init early_reserve_initrd(void) { @@ -1051,6 +1053,12 @@ void __init setup_arch(char **cmdline_p) max_possible_pfn = max_pfn; + /* + * Define random base addresses for memory sections after max_pfn is + * defined and before each memory section base is used. + */ + kernel_randomize_memory(); + #ifdef CONFIG_X86_32 /* max_low_pfn get updated here */ find_low_pfn_range(); @@ -1093,6 +1101,8 @@ void __init setup_arch(char **cmdline_p) efi_find_mirror(); } + reserve_bios_regions(); + /* * The EFI specification says that boot service code won't be called * after ExitBootServices(). This is, in fact, a lie. @@ -1121,7 +1131,13 @@ void __init setup_arch(char **cmdline_p) early_trap_pf_init(); - setup_real_mode(); + /* + * Update mmu_cr4_features (and, indirectly, trampoline_cr4_features) + * with the current CR4 value. This may not be necessary, but + * auditing all the early-boot CR4 manipulation would be needed to + * rule it out. + */ + mmu_cr4_features = __read_cr4_safe(); memblock_set_current_limit(get_max_mapped()); @@ -1138,9 +1154,7 @@ void __init setup_arch(char **cmdline_p) reserve_initrd(); -#if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD) - acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start); -#endif + acpi_table_upgrade(); vsmp_init(); @@ -1172,13 +1186,6 @@ void __init setup_arch(char **cmdline_p) kasan_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, |
