/* * Copyright (C) 2012 ARM Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #ifndef __ASM_SMP_H #define __ASM_SMP_H /* Values for secondary_data.status */ #define CPU_MMU_OFF (-1) #define CPU_BOOT_SUCCESS (0) /* The cpu invoked ops->cpu_die, synchronise it with cpu_kill */ #define CPU_KILL_ME (1) /* The cpu couldn't die gracefully and is looping in the kernel */ #define CPU_STUCK_IN_KERNEL (2) /* Fatal system error detected by secondary CPU, crash the system */ #define CPU_PANIC_KERNEL (3) #ifndef __ASSEMBLY__ #include <asm/percpu.h> #include <linux/threads.h> #include <linux/cpumask.h> #include <linux/thread_info.h> DECLARE_PER_CPU_READ_MOSTLY(int, cpu_number); /* * We don't use this_cpu_read(cpu_number) as that has implicit writes to * preempt_count, and associated (compiler) barriers, that we'd like to avoid * the expense of. If we're preemptible, the value can be stale at use anyway. * And we can't use this_cpu_ptr() either, as that winds up recursing back * here under CONFIG_DEBUG_PREEMPT=y. */ #define raw_smp_processor_id() (*raw_cpu_ptr(&cpu_number)) struct seq_file; /* * generate IPI list text */ extern void show_ipi_list(struct seq_file *p, int prec); /* * Called from C code, this handles an IPI. */ extern void handle_IPI(int ipinr, struct pt_regs *regs); /* * Discover the set of possible CPUs and determine their * SMP operations. */ extern void smp_init_cpus(void); /* * Provide a function to raise an IPI cross call on CPUs in callmap. */ extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int)); extern void (*__smp_cross_call)(const struct cpumask *, unsigned int); /* * Called from the secondary holding pen, this is the secondary CPU entry point. */ asmlinkage void secondary_start_kernel(void); /* * Initial data for bringing up a secondary CPU. * @stack - sp for the secondary CPU * @status - Result passed back from the secondary CPU to * indicate failure. */ struct secondary_data { void *stack; struct task_struct *task; long status; }; extern struct secondary_data secondary_data; extern long __early_cpu_boot_status; extern void secondary_entry(void); extern void arch_send_call_function_single_ipi(int cpu); extern void arch_send_call_function_ipi_mask(const struct cpumask *mask); #ifdef CONFIG_ARM64_ACPI_PARKING_PROTOCOL extern void arch_send_wakeup_ipi_mask(const struct cpumask *mask); #else static inline void arch_send_wakeup_ipi_mask(const struct cpumask *mask) { BUILD_BUG(); } #endif extern int __cpu_disable(void); extern void __cpu_die(unsigned int cpu); extern void cpu_die(void); extern void cpu_die_early(void); static inline void cpu_park_loop(void) { for (;;) { wfe(); wfi(); } } static inline void update_cpu_boot_status(int val) { WRITE_ONCE(secondary_data.status, val); /* Ensure the visibility of the status update */ dsb(ishst); } /* * The calling secondary CPU has detected serious configuration mismatch, * which calls for a kernel panic. Update the boot status and park the calling * CPU. */ static inline void cpu_panic_kernel(void) { update_cpu_boot_status(CPU_PANIC_KERNEL); cpu_park_loop(); } /* * If a secondary CPU enters the kernel but fails to come online, * (e.g. due to mismatched features), and cannot exit the kernel, * we increment cpus_stuck_in_kernel and leave the CPU in a * quiesecent loop within the kernel text. The memory containing * this loop must not be re-used for anything else as the 'stuck' * core is executing it. * * This function is used to inhibit features like kexec and hibernate. */ bool cpus_are_stuck_in_kernel(void); extern void crash_smp_send_stop(void); extern bool smp_crash_stop_failed(void); #endif /* ifndef __ASSEMBLY__ */ #endif /* ifndef __ASM_SMP_H */
Name | Type | Size | Permission | Actions |
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xen | Folder | 0755 |
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Kbuild | File | 703 B | 0644 |
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acenv.h | File | 541 B | 0644 |
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acpi.h | File | 4.34 KB | 0644 |
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alternative.h | File | 7.63 KB | 0644 |
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arch_gicv3.h | File | 3.44 KB | 0644 |
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arch_timer.h | File | 4.87 KB | 0644 |
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arm-cci.h | File | 794 B | 0644 |
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asm-bug.h | File | 1.45 KB | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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asm-uaccess.h | File | 2.09 KB | 0644 |
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assembler.h | File | 13.51 KB | 0644 |
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atomic.h | File | 8.35 KB | 0644 |
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atomic_ll_sc.h | File | 10.61 KB | 0644 |
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atomic_lse.h | File | 14.82 KB | 0644 |
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barrier.h | File | 3.78 KB | 0644 |
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bitops.h | File | 1.9 KB | 0644 |
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bitrev.h | File | 452 B | 0644 |
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boot.h | File | 384 B | 0644 |
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brk-imm.h | File | 706 B | 0644 |
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bug.h | File | 1.09 KB | 0644 |
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cache.h | File | 2.23 KB | 0644 |
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cacheflush.h | File | 4.87 KB | 0644 |
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checksum.h | File | 1.35 KB | 0644 |
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clocksource.h | File | 192 B | 0644 |
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cmpxchg.h | File | 7.98 KB | 0644 |
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compat.h | File | 7.15 KB | 0644 |
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compiler.h | File | 1.18 KB | 0644 |
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cpu.h | File | 1.84 KB | 0644 |
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cpu_ops.h | File | 2.73 KB | 0644 |
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cpucaps.h | File | 1.87 KB | 0644 |
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cpufeature.h | File | 19.14 KB | 0644 |
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cpuidle.h | File | 401 B | 0644 |
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cputype.h | File | 8.1 KB | 0644 |
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current.h | File | 517 B | 0644 |
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daifflags.h | File | 1.59 KB | 0644 |
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dcc.h | File | 1.36 KB | 0644 |
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debug-monitors.h | File | 3.76 KB | 0644 |
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device.h | File | 886 B | 0644 |
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dma-mapping.h | File | 2.42 KB | 0644 |
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dmi.h | File | 850 B | 0644 |
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efi.h | File | 4.57 KB | 0644 |
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elf.h | File | 5.7 KB | 0644 |
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esr.h | File | 9.02 KB | 0644 |
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exception.h | File | 1.21 KB | 0644 |
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exec.h | File | 868 B | 0644 |
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extable.h | File | 815 B | 0644 |
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fb.h | File | 1000 B | 0644 |
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fixmap.h | File | 2.91 KB | 0644 |
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fpsimd.h | File | 4.21 KB | 0644 |
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fpsimdmacros.h | File | 5.62 KB | 0644 |
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ftrace.h | File | 1.92 KB | 0644 |
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futex.h | File | 3.41 KB | 0644 |
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hardirq.h | File | 2.08 KB | 0644 |
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hugetlb.h | File | 2.71 KB | 0644 |
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hw_breakpoint.h | File | 4.46 KB | 0644 |
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hwcap.h | File | 1.86 KB | 0644 |
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hypervisor.h | File | 144 B | 0644 |
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insn.h | File | 16.03 KB | 0644 |
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io.h | File | 7.72 KB | 0644 |
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irq.h | File | 307 B | 0644 |
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irq_work.h | File | 228 B | 0644 |
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irqflags.h | File | 2.3 KB | 0644 |
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jump_label.h | File | 1.68 KB | 0644 |
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kasan.h | File | 1.16 KB | 0644 |
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kernel-pgtable.h | File | 4.03 KB | 0644 |
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kexec.h | File | 2.42 KB | 0644 |
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kgdb.h | File | 3.79 KB | 0644 |
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kprobes.h | File | 1.74 KB | 0644 |
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kvm_arm.h | File | 8.38 KB | 0644 |
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kvm_asm.h | File | 4.26 KB | 0644 |
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kvm_coproc.h | File | 2.04 KB | 0644 |
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kvm_emulate.h | File | 10.38 KB | 0644 |
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kvm_host.h | File | 15.73 KB | 0644 |
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kvm_hyp.h | File | 5.79 KB | 0644 |
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kvm_mmio.h | File | 1.3 KB | 0644 |
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kvm_mmu.h | File | 11.72 KB | 0644 |
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linkage.h | File | 114 B | 0644 |
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lse.h | File | 1.26 KB | 0644 |
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memblock.h | File | 720 B | 0644 |
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memory.h | File | 9.16 KB | 0644 |
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mmu.h | File | 2.76 KB | 0644 |
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mmu_context.h | File | 6.35 KB | 0644 |
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mmzone.h | File | 266 B | 0644 |
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module.h | File | 2.8 KB | 0644 |
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neon.h | File | 815 B | 0644 |
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numa.h | File | 1.33 KB | 0644 |
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page-def.h | File | 1.17 KB | 0644 |
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page.h | File | 1.61 KB | 0644 |
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paravirt.h | File | 458 B | 0644 |
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pci.h | File | 878 B | 0644 |
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percpu.h | File | 7.48 KB | 0644 |
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perf_event.h | File | 3.17 KB | 0644 |
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pgalloc.h | File | 3.71 KB | 0644 |
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pgtable-hwdef.h | File | 9.4 KB | 0644 |
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pgtable-prot.h | File | 4.38 KB | 0644 |
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pgtable-types.h | File | 1.84 KB | 0644 |
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pgtable.h | File | 21.55 KB | 0644 |
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probes.h | File | 1022 B | 0644 |
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proc-fns.h | File | 1.21 KB | 0644 |
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processor.h | File | 6.52 KB | 0644 |
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ptdump.h | File | 1.42 KB | 0644 |
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ptrace.h | File | 9 KB | 0644 |
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sdei.h | File | 1.46 KB | 0644 |
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seccomp.h | File | 714 B | 0644 |
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sections.h | File | 1.46 KB | 0644 |
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shmparam.h | File | 965 B | 0644 |
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signal32.h | File | 1.45 KB | 0644 |
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simd.h | File | 1.39 KB | 0644 |
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smp.h | File | 4.23 KB | 0644 |
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smp_plat.h | File | 1.43 KB | 0644 |
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sparsemem.h | File | 771 B | 0644 |
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spinlock.h | File | 3.33 KB | 0644 |
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spinlock_types.h | File | 1.06 KB | 0644 |
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stack_pointer.h | File | 247 B | 0644 |
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stackprotector.h | File | 1.11 KB | 0644 |
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stacktrace.h | File | 2.53 KB | 0644 |
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stage2_pgtable-nopmd.h | File | 1.3 KB | 0644 |
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stage2_pgtable-nopud.h | File | 1.24 KB | 0644 |
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stage2_pgtable.h | File | 4.89 KB | 0644 |
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stat.h | File | 1.43 KB | 0644 |
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string.h | File | 2.33 KB | 0644 |
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suspend.h | File | 1.65 KB | 0644 |
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sync_bitops.h | File | 1.11 KB | 0644 |
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syscall.h | File | 2.87 KB | 0644 |
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sysreg.h | File | 25.1 KB | 0644 |
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system_misc.h | File | 1.86 KB | 0644 |
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thread_info.h | File | 3.93 KB | 0644 |
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timex.h | File | 883 B | 0644 |
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tlb.h | File | 2.22 KB | 0644 |
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tlbflush.h | File | 5.38 KB | 0644 |
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topology.h | File | 1.29 KB | 0644 |
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traps.h | File | 3.33 KB | 0644 |
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uaccess.h | File | 12.01 KB | 0644 |
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unistd.h | File | 1.6 KB | 0644 |
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unistd32.h | File | 27.53 KB | 0644 |
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uprobes.h | File | 777 B | 0644 |
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vdso.h | File | 1.09 KB | 0644 |
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vdso_datapage.h | File | 1.53 KB | 0644 |
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vectors.h | File | 1.75 KB | 0644 |
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virt.h | File | 3 KB | 0644 |
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vmap_stack.h | File | 769 B | 0644 |
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word-at-a-time.h | File | 2.22 KB | 0644 |
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