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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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cc1ba8ea6d
Dynamically allocate cpu_sibling_map and cpu_core_map cpumasks. We don't need to set_cpu_online() the boot cpu in smp_prepare_boot_cpu, init/main.c does it for us. We also postpone setting of the boot cpu in cpu_sibling_map and cpu_core_map until when the memory allocator is available (smp_prepare_cpus), similar to x86. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
175 lines
4.2 KiB
C
175 lines
4.2 KiB
C
/*
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* smp.h: PowerPC-specific SMP code.
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*
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* Original was a copy of sparc smp.h. Now heavily modified
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* for PPC.
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*
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* Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
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* Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _ASM_POWERPC_SMP_H
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#define _ASM_POWERPC_SMP_H
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#ifdef __KERNEL__
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#include <linux/threads.h>
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#include <linux/cpumask.h>
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#include <linux/kernel.h>
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#ifndef __ASSEMBLY__
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#ifdef CONFIG_PPC64
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#include <asm/paca.h>
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#endif
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#include <asm/percpu.h>
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extern int boot_cpuid;
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extern void cpu_die(void);
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#ifdef CONFIG_SMP
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extern void smp_send_debugger_break(int cpu);
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extern void smp_message_recv(int);
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DECLARE_PER_CPU(unsigned int, cpu_pvr);
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#ifdef CONFIG_HOTPLUG_CPU
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extern void fixup_irqs(const struct cpumask *map);
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int generic_cpu_disable(void);
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int generic_cpu_enable(unsigned int cpu);
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void generic_cpu_die(unsigned int cpu);
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void generic_mach_cpu_die(void);
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#endif
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#ifdef CONFIG_PPC64
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#define raw_smp_processor_id() (local_paca->paca_index)
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#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
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#else
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/* 32-bit */
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extern int smp_hw_index[];
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#define raw_smp_processor_id() (current_thread_info()->cpu)
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#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
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static inline int get_hard_smp_processor_id(int cpu)
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{
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return smp_hw_index[cpu];
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}
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static inline void set_hard_smp_processor_id(int cpu, int phys)
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{
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smp_hw_index[cpu] = phys;
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}
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#endif
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DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
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DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
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static inline struct cpumask *cpu_sibling_mask(int cpu)
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{
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return per_cpu(cpu_sibling_map, cpu);
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}
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static inline struct cpumask *cpu_core_mask(int cpu)
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{
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return per_cpu(cpu_core_map, cpu);
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}
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extern int cpu_to_core_id(int cpu);
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/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
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*
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* Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
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* in /proc/interrupts will be wrong!!! --Troy */
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#define PPC_MSG_CALL_FUNCTION 0
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#define PPC_MSG_RESCHEDULE 1
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#define PPC_MSG_CALL_FUNC_SINGLE 2
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#define PPC_MSG_DEBUGGER_BREAK 3
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/*
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* irq controllers that have dedicated ipis per message and don't
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* need additional code in the action handler may use this
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*/
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extern int smp_request_message_ipi(int virq, int message);
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extern const char *smp_ipi_name[];
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void smp_init_iSeries(void);
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void smp_init_pSeries(void);
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void smp_init_cell(void);
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void smp_init_celleb(void);
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void smp_setup_cpu_maps(void);
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extern int __cpu_disable(void);
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extern void __cpu_die(unsigned int cpu);
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#else
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/* for UP */
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#define hard_smp_processor_id() get_hard_smp_processor_id(0)
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#define smp_setup_cpu_maps()
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#endif /* CONFIG_SMP */
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#ifdef CONFIG_PPC64
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static inline int get_hard_smp_processor_id(int cpu)
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{
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return paca[cpu].hw_cpu_id;
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}
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static inline void set_hard_smp_processor_id(int cpu, int phys)
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{
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paca[cpu].hw_cpu_id = phys;
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}
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extern void smp_release_cpus(void);
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#else
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/* 32-bit */
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#ifndef CONFIG_SMP
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extern int boot_cpuid_phys;
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static inline int get_hard_smp_processor_id(int cpu)
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{
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return boot_cpuid_phys;
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}
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static inline void set_hard_smp_processor_id(int cpu, int phys)
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{
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boot_cpuid_phys = phys;
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}
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#endif /* !CONFIG_SMP */
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#endif /* !CONFIG_PPC64 */
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extern int smt_enabled_at_boot;
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extern int smp_mpic_probe(void);
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extern void smp_mpic_setup_cpu(int cpu);
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extern void smp_generic_kick_cpu(int nr);
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extern void smp_generic_give_timebase(void);
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extern void smp_generic_take_timebase(void);
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extern struct smp_ops_t *smp_ops;
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extern void arch_send_call_function_single_ipi(int cpu);
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extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
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/* Definitions relative to the secondary CPU spin loop
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* and entry point. Not all of them exist on both 32 and
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* 64-bit but defining them all here doesn't harm
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*/
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extern void generic_secondary_smp_init(void);
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extern void generic_secondary_thread_init(void);
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extern unsigned long __secondary_hold_spinloop;
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extern unsigned long __secondary_hold_acknowledge;
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extern char __secondary_hold;
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#endif /* __ASSEMBLY__ */
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_SMP_H) */
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