diff options
Diffstat (limited to 'arch/arm64/kernel/setup.c')
| -rw-r--r-- | arch/arm64/kernel/setup.c | 76 |
1 files changed, 54 insertions, 22 deletions
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c index e8420f635bd4..74753132c3ac 100644 --- a/arch/arm64/kernel/setup.c +++ b/arch/arm64/kernel/setup.c @@ -17,6 +17,7 @@ * along with this program. If not, see <http://www.gnu.org/licenses/>. */ +#include <linux/acpi.h> #include <linux/export.h> #include <linux/kernel.h> #include <linux/stddef.h> @@ -46,11 +47,11 @@ #include <linux/efi.h> #include <linux/personality.h> +#include <asm/acpi.h> #include <asm/fixmap.h> #include <asm/cpu.h> #include <asm/cputype.h> #include <asm/elf.h> -#include <asm/cputable.h> #include <asm/cpufeature.h> #include <asm/cpu_ops.h> #include <asm/sections.h> @@ -62,9 +63,7 @@ #include <asm/memblock.h> #include <asm/psci.h> #include <asm/efi.h> - -unsigned int processor_id; -EXPORT_SYMBOL(processor_id); +#include <asm/virt.h> unsigned long elf_hwcap __read_mostly; EXPORT_SYMBOL_GPL(elf_hwcap); @@ -83,7 +82,6 @@ unsigned int compat_elf_hwcap2 __read_mostly; DECLARE_BITMAP(cpu_hwcaps, ARM64_NCAPS); -static const char *cpu_name; phys_addr_t __fdt_pointer __initdata; /* @@ -119,6 +117,11 @@ void __init early_print(const char *str, ...) printk("%s", buf); } +/* + * The recorded values of x0 .. x3 upon kernel entry. + */ +u64 __cacheline_aligned boot_args[4]; + void __init smp_setup_processor_id(void) { u64 mpidr = read_cpuid_mpidr() & MPIDR_HWID_BITMASK; @@ -207,24 +210,38 @@ static void __init smp_build_mpidr_hash(void) } #endif +static void __init hyp_mode_check(void) +{ + if (is_hyp_mode_available()) + pr_info("CPU: All CPU(s) started at EL2\n"); + else if (is_hyp_mode_mismatched()) + WARN_TAINT(1, TAINT_CPU_OUT_OF_SPEC, + "CPU: CPUs started in inconsistent modes"); + else + pr_info("CPU: All CPU(s) started at EL1\n"); +} + +void __init do_post_cpus_up_work(void) +{ + hyp_mode_check(); + apply_alternatives_all(); +} + +#ifdef CONFIG_UP_LATE_INIT +void __init up_late_init(void) +{ + do_post_cpus_up_work(); +} +#endif /* CONFIG_UP_LATE_INIT */ + static void __init setup_processor(void) { - struct cpu_info *cpu_info; u64 features, block; u32 cwg; int cls; - cpu_info = lookup_processor_type(read_cpuid_id()); - if (!cpu_info) { - printk("CPU configuration botched (ID %08x), unable to continue.\n", - read_cpuid_id()); - while (1); - } - - cpu_name = cpu_info->cpu_name; - - printk("CPU: %s [%08x] revision %d\n", - cpu_name, read_cpuid_id(), read_cpuid_id() & 15); + printk("CPU: AArch64 Processor [%08x] revision %d\n", + read_cpuid_id(), read_cpuid_id() & 15); sprintf(init_utsname()->machine, ELF_PLATFORM); elf_hwcap = 0; @@ -380,18 +397,27 @@ void __init setup_arch(char **cmdline_p) efi_init(); arm64_memblock_init(); + /* Parse the ACPI tables for possible boot-time configuration */ + acpi_boot_table_init(); + paging_init(); request_standard_resources(); early_ioremap_reset(); - unflatten_device_tree(); - - psci_init(); + 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(); + } - cpu_read_bootcpu_ops(); #ifdef CONFIG_SMP - smp_init_cpus(); smp_build_mpidr_hash(); #endif @@ -402,6 +428,12 @@ void __init setup_arch(char **cmdline_p) conswitchp = &dummy_con; #endif #endif + if (boot_args[1] || boot_args[2] || boot_args[3]) { + pr_err("WARNING: x1-x3 nonzero in violation of boot protocol:\n" + "\tx1: %016llx\n\tx2: %016llx\n\tx3: %016llx\n" + "This indicates a broken bootloader or old kernel\n", + boot_args[1], boot_args[2], boot_args[3]); + } } static int __init arm64_device_init(void) |