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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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b866cc2199
Change the doorbell callers to know about their msgsnd addressing, rather than have them set a per-cpu target data tag at boot that gets sent to the cause_ipi functions. The data is only used for doorbell IPI functions, no other IPI types, so it makes sense to keep that detail local to doorbell. Have the platform code understand doorbell IPIs, rather than the interrupt controller code understand them. Platform code can look at capabilities it has available and decide which to use. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
216 lines
5.6 KiB
C
216 lines
5.6 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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#include <linux/irqreturn.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 int spinning_secondaries;
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extern void cpu_die(void);
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extern int cpu_to_chip_id(int cpu);
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#ifdef CONFIG_SMP
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struct smp_ops_t {
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void (*message_pass)(int cpu, int msg);
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#ifdef CONFIG_PPC_SMP_MUXED_IPI
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void (*cause_ipi)(int cpu);
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#endif
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void (*probe)(void);
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int (*kick_cpu)(int nr);
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int (*prepare_cpu)(int nr);
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void (*setup_cpu)(int nr);
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void (*bringup_done)(void);
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void (*take_timebase)(void);
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void (*give_timebase)(void);
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int (*cpu_disable)(void);
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void (*cpu_die)(unsigned int nr);
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int (*cpu_bootable)(unsigned int nr);
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};
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extern void smp_send_debugger_break(void);
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extern void start_secondary_resume(void);
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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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DECLARE_PER_CPU(unsigned int, cpu_pvr);
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#ifdef CONFIG_HOTPLUG_CPU
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int generic_cpu_disable(void);
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void generic_cpu_die(unsigned int cpu);
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void generic_set_cpu_dead(unsigned int cpu);
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void generic_set_cpu_up(unsigned int cpu);
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int generic_check_cpu_restart(unsigned int cpu);
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int is_cpu_dead(unsigned int cpu);
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#else
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#define generic_set_cpu_up(i) do { } while (0)
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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_TICK_BROADCAST 2
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#define PPC_MSG_DEBUGGER_BREAK 3
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/* This is only used by the powernv kernel */
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#define PPC_MSG_RM_HOST_ACTION 4
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/* for irq controllers that have dedicated ipis per message (4) */
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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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/* for irq controllers with only a single ipi */
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extern void smp_muxed_ipi_message_pass(int cpu, int msg);
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extern void smp_muxed_ipi_set_message(int cpu, int msg);
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extern irqreturn_t smp_ipi_demux(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_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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static inline void inhibit_secondary_onlining(void) {}
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static inline void uninhibit_secondary_onlining(void) {}
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static inline const struct cpumask *cpu_sibling_mask(int cpu)
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{
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return cpumask_of(cpu);
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}
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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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#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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#if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
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extern void smp_release_cpus(void);
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#else
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static inline void smp_release_cpus(void) { };
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#endif
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extern int smt_enabled_at_boot;
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extern void smp_mpic_probe(void);
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extern void smp_mpic_setup_cpu(int cpu);
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extern int smp_generic_kick_cpu(int nr);
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extern int smp_generic_cpu_bootable(unsigned 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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extern unsigned int booting_thread_hwid;
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extern void __early_start(void);
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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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