diff options
Diffstat (limited to 'arch/riscv/kernel/setup.c')
| -rw-r--r-- | arch/riscv/kernel/setup.c | 68 |
1 files changed, 45 insertions, 23 deletions
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 535a837de55d..4fe45daa6281 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -26,7 +26,6 @@ #include <asm/alternative.h> #include <asm/cacheflush.h> #include <asm/cpufeature.h> -#include <asm/cpu_ops.h> #include <asm/early_ioremap.h> #include <asm/pgtable.h> #include <asm/setup.h> @@ -51,7 +50,6 @@ atomic_t hart_lottery __section(".sdata") #endif ; unsigned long boot_cpu_hartid; -static DEFINE_PER_CPU(struct cpu, cpu_devices); /* * Place kernel memory regions on the resource tree so that @@ -149,9 +147,7 @@ static void __init init_resources(void) res_idx = num_resources - 1; mem_res_sz = num_resources * sizeof(*mem_res); - mem_res = memblock_alloc(mem_res_sz, SMP_CACHE_BYTES); - if (!mem_res) - panic("%s: Failed to allocate %zu bytes\n", __func__, mem_res_sz); + mem_res = memblock_alloc_or_panic(mem_res_sz, SMP_CACHE_BYTES); /* * Start by adding the reserved regions, if they overlap @@ -229,7 +225,7 @@ static void __init init_resources(void) static void __init parse_dtb(void) { /* Early scan of device tree from init memory */ - if (early_init_dt_scan(dtb_early_va)) { + if (early_init_dt_scan(dtb_early_va, dtb_early_pa)) { const char *name = of_flat_dt_get_machine_name(); if (name) { @@ -246,6 +242,42 @@ static void __init parse_dtb(void) #endif } +#if defined(CONFIG_RISCV_COMBO_SPINLOCKS) +DEFINE_STATIC_KEY_TRUE(qspinlock_key); +EXPORT_SYMBOL(qspinlock_key); +#endif + +static void __init riscv_spinlock_init(void) +{ + char *using_ext = NULL; + + if (IS_ENABLED(CONFIG_RISCV_TICKET_SPINLOCKS)) { + pr_info("Ticket spinlock: enabled\n"); + return; + } + + if (IS_ENABLED(CONFIG_RISCV_ISA_ZABHA) && + IS_ENABLED(CONFIG_RISCV_ISA_ZACAS) && + riscv_isa_extension_available(NULL, ZABHA) && + riscv_isa_extension_available(NULL, ZACAS)) { + using_ext = "using Zabha"; + } else if (riscv_isa_extension_available(NULL, ZICCRSE)) { + using_ext = "using Ziccrse"; + } +#if defined(CONFIG_RISCV_COMBO_SPINLOCKS) + else { + static_branch_disable(&qspinlock_key); + pr_info("Ticket spinlock: enabled\n"); + return; + } +#endif + + if (!using_ext) + pr_err("Queued spinlock without Zabha or Ziccrse"); + else + pr_info("Queued spinlock %s: enabled\n", using_ext); +} + extern void __init init_rt_signal_env(void); void __init setup_arch(char **cmdline_p) @@ -283,13 +315,15 @@ void __init setup_arch(char **cmdline_p) setup_smp(); #endif - if (!acpi_disabled) + if (!acpi_disabled) { acpi_init_rintc_map(); + acpi_map_cpus_to_nodes(); + } riscv_init_cbo_blocksizes(); riscv_fill_hwcap(); - init_rt_signal_env(); apply_boot_alternatives(); + init_rt_signal_env(); if (IS_ENABLED(CONFIG_RISCV_ISA_ZICBOM) && riscv_isa_extension_available(NULL, ZICBOM)) @@ -297,25 +331,13 @@ void __init setup_arch(char **cmdline_p) riscv_set_dma_cache_alignment(); riscv_user_isa_enable(); + riscv_spinlock_init(); } -static int __init topology_init(void) +bool arch_cpu_is_hotpluggable(int cpu) { - int i, ret; - - for_each_possible_cpu(i) { - struct cpu *cpu = &per_cpu(cpu_devices, i); - - cpu->hotpluggable = cpu_has_hotplug(i); - ret = register_cpu(cpu, i); - if (unlikely(ret)) - pr_warn("Warning: %s: register_cpu %d failed (%d)\n", - __func__, i, ret); - } - - return 0; + return cpu_has_hotplug(cpu); } -subsys_initcall(topology_init); void free_initmem(void) { |