diff options
Diffstat (limited to 'arch/arm64/kernel/setup.c')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 125 |
1 files changed, 90 insertions, 35 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index bbdb53b87e13..6dfbc51edb07 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -46,6 +46,7 @@ #include <linux/of_platform.h> #include <linux/efi.h> #include <linux/personality.h> +#include <linux/psci.h> #include <asm/acpi.h> #include <asm/fixmap.h> @@ -54,6 +55,7 @@ #include <asm/elf.h> #include <asm/cpufeature.h> #include <asm/cpu_ops.h> +#include <asm/kasan.h> #include <asm/sections.h> #include <asm/setup.h> #include <asm/smp_plat.h> @@ -61,7 +63,6 @@ #include <asm/tlbflush.h> #include <asm/traps.h> #include <asm/memblock.h> -#include <asm/psci.h> #include <asm/efi.h> #include <asm/virt.h> @@ -81,6 +82,8 @@ unsigned int compat_elf_hwcap2 __read_mostly; #endif DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS); +#include <asm/xen/hypervisor.h> +#include <asm/mmu_context.h> phys_addr_t __fdt_pointer __initdata; @@ -105,18 +108,6 @@ static struct resource mem_res[] = { #define kernel_code mem_res[0] #define kernel_data mem_res[1] -void __init early_print(const char *str, ...) -{ - char buf[256]; - va_list ap; - - va_start(ap, str); - vsnprintf(buf, sizeof(buf), str, ap); - va_end(ap); - - printk("%s", buf); -} - /* * The recorded values of x0 .. x3 upon kernel entry. */ @@ -142,7 +133,6 @@ bool arch_match_cpu_phys_id(int cpu, u64 phys_id) } struct mpidr_hash mpidr_hash; -#ifdef CONFIG_SMP /** * smp_build_mpidr_hash - Pre-compute shifts required at each affinity * level in order to build a linear index from an @@ -206,9 +196,7 @@ static void __init smp_build_mpidr_hash(void) */ if (mpidr_hash_size() > 4 * num_possible_cpus()) pr_warn("Large number of MPIDR hash buckets detected\n"); - __flush_dcache_area(&mpidr_hash, sizeof(struct mpidr_hash)); } -#endif static void __init hyp_mode_check(void) { @@ -240,8 +228,7 @@ static void __init setup_processor(void) u32 cwg; int cls; - printk("CPU: AArch64 Processor [%08x] revision %d\n", - read_cpuid_id(), read_cpuid_id() & 15); + pr_info("Boot CPU: AArch64 Processor [%08x]\n", read_cpuid_id()); sprintf(init_utsname()->machine, ELF_PLATFORM); elf_hwcap = 0; @@ -326,12 +313,14 @@ static void __init setup_processor(void) static void __init setup_machine_fdt(phys_addr_t dt_phys) { - if (!dt_phys || !early_init_dt_scan(phys_to_virt(dt_phys))) { - early_print("\n" - "Error: invalid device tree blob at physical address 0x%p (virtual address 0x%p)\n" - "The dtb must be 8-byte aligned and passed in the first 512MB of memory\n" - "\nPlease check your bootloader.\n", - dt_phys, phys_to_virt(dt_phys)); + void *dt_virt = fixmap_remap_fdt(dt_phys); + + if (!dt_virt || !early_init_dt_scan(dt_virt)) { + pr_crit("\n" + "Error: invalid device tree blob at physical address %pa (virtual address 0x%p)\n" + "The dtb must be 8-byte aligned and must not exceed 2 MB in size\n" + "\nPlease check your bootloader.", + &dt_phys, dt_virt); while (true) cpu_relax(); @@ -368,14 +357,75 @@ static void __init request_standard_resources(void) } } +#ifdef CONFIG_BLK_DEV_INITRD +/* + * Relocate initrd if it is not completely within the linear mapping. + * This would be the case if mem= cuts out all or part of it. + */ +static void __init relocate_initrd(void) +{ + phys_addr_t orig_start = __virt_to_phys(initrd_start); + phys_addr_t orig_end = __virt_to_phys(initrd_end); + phys_addr_t ram_end = memblock_end_of_DRAM(); + phys_addr_t new_start; + unsigned long size, to_free = 0; + void *dest; + + if (orig_end <= ram_end) + return; + + /* + * Any of the original initrd which overlaps the linear map should + * be freed after relocating. + */ + if (orig_start < ram_end) + to_free = ram_end - orig_start; + + size = orig_end - orig_start; + if (!size) + return; + + /* initrd needs to be relocated completely inside linear mapping */ + new_start = memblock_find_in_range(0, PFN_PHYS(max_pfn), + size, PAGE_SIZE); + if (!new_start) + panic("Cannot relocate initrd of size %ld\n", size); + memblock_reserve(new_start, size); + + initrd_start = __phys_to_virt(new_start); + initrd_end = initrd_start + size; + + pr_info("Moving initrd from [%llx-%llx] to [%llx-%llx]\n", + orig_start, orig_start + size - 1, + new_start, new_start + size - 1); + + dest = (void *)initrd_start; + + if (to_free) { + memcpy(dest, (void *)__phys_to_virt(orig_start), to_free); + dest += to_free; + } + + copy_from_early_mem(dest, orig_start + to_free, size - to_free); + + if (to_free) { + pr_info("Freeing original RAMDISK from [%llx-%llx]\n", + orig_start, orig_start + to_free - 1); + memblock_free(orig_start, to_free); + } +} +#else +static inline void __init relocate_initrd(void) +{ +} +#endif + u64 __cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID }; void __init setup_arch(char **cmdline_p) { setup_processor(); - setup_machine_fdt(__fdt_pointer); - init_mm.start_code = (unsigned long) _text; init_mm.end_code = (unsigned long) _etext; init_mm.end_data = (unsigned long) _edata; @@ -386,6 +436,8 @@ void __init setup_arch(char **cmdline_p) early_fixmap_init(); early_ioremap_init(); + setup_machine_fdt(__fdt_pointer); + parse_early_param(); /* @@ -394,6 +446,12 @@ void __init setup_arch(char **cmdline_p) */ local_async_enable(); + /* + * TTBR0 is only used for the identity mapping at this stage. Make it + * point to zero page to avoid speculatively fetching new entries. + */ + cpu_uninstall_idmap(); + efi_init(); arm64_memblock_init(); @@ -401,6 +459,10 @@ void __init setup_arch(char **cmdline_p) acpi_boot_table_init(); paging_init(); + relocate_initrd(); + + kasan_init(); + request_standard_resources(); early_ioremap_reset(); @@ -408,18 +470,13 @@ void __init setup_arch(char **cmdline_p) if (acpi_disabled) { unflatten_device_tree(); psci_dt_init(); - cpu_read_bootcpu_ops(); -#ifdef CONFIG_SMP - of_smp_init_cpus(); -#endif } else { psci_acpi_init(); - acpi_init_cpus(); } -#ifdef CONFIG_SMP + cpu_read_bootcpu_ops(); + smp_init_cpus(); smp_build_mpidr_hash(); -#endif #ifdef CONFIG_VT #if defined(CONFIG_VGA_CONSOLE) @@ -519,9 +576,7 @@ static int c_show(struct seq_file *m, void *v) * online processors, looking for lines beginning with * "processor". Give glibc what it expects. */ -#ifdef CONFIG_SMP seq_printf(m, "processor\t: %d\n", i); -#endif seq_printf(m, "BogoMIPS\t: %lu.%02lu\n", loops_per_jiffy / (500000UL/HZ), |