Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 271 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
new file mode 100644
index 0000000000..aaaa576d0e
--- /dev/null
+++ b/arch/powerpc/include/asm/smp.h
@@ -0,0 +1,271 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* 
+ * smp.h: PowerPC-specific SMP code.
+ *
+ * Original was a copy of sparc smp.h.  Now heavily modified
+ * for PPC.
+ *
+ * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu)
+ * Copyright (C) 1996-2001 Cort Dougan <cort@fsmlabs.com>
+ */
+
+#ifndef _ASM_POWERPC_SMP_H
+#define _ASM_POWERPC_SMP_H
+#ifdef __KERNEL__
+
+#include <linux/threads.h>
+#include <linux/cpumask.h>
+#include <linux/kernel.h>
+#include <linux/irqreturn.h>
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_PPC64
+#include <asm/paca.h>
+#endif
+#include <asm/percpu.h>
+
+extern int boot_cpuid;
+extern int boot_cpu_hwid; /* PPC64 only */
+extern int spinning_secondaries;
+extern u32 *cpu_to_phys_id;
+extern bool coregroup_enabled;
+
+extern int cpu_to_chip_id(int cpu);
+extern int *chip_id_lookup_table;
+
+DECLARE_PER_CPU(cpumask_var_t, thread_group_l1_cache_map);
+DECLARE_PER_CPU(cpumask_var_t, thread_group_l2_cache_map);
+DECLARE_PER_CPU(cpumask_var_t, thread_group_l3_cache_map);
+
+#ifdef CONFIG_SMP
+
+struct smp_ops_t {
+	void  (*message_pass)(int cpu, int msg);
+#ifdef CONFIG_PPC_SMP_MUXED_IPI
+	void  (*cause_ipi)(int cpu);
+#endif
+	int   (*cause_nmi_ipi)(int cpu);
+	void  (*probe)(void);
+	int   (*kick_cpu)(int nr);
+	int   (*prepare_cpu)(int nr);
+	void  (*setup_cpu)(int nr);
+	void  (*bringup_done)(void);
+	void  (*take_timebase)(void);
+	void  (*give_timebase)(void);
+	int   (*cpu_disable)(void);
+	void  (*cpu_die)(unsigned int nr);
+	int   (*cpu_bootable)(unsigned int nr);
+#ifdef CONFIG_HOTPLUG_CPU
+	void  (*cpu_offline_self)(void);
+#endif
+};
+
+extern struct task_struct *secondary_current;
+
+void start_secondary(void *unused);
+extern int smp_send_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
+extern int smp_send_safe_nmi_ipi(int cpu, void (*fn)(struct pt_regs *), u64 delay_us);
+extern void smp_send_debugger_break(void);
+extern void __noreturn start_secondary_resume(void);
+extern void smp_generic_give_timebase(void);
+extern void smp_generic_take_timebase(void);
+
+DECLARE_PER_CPU(unsigned int, cpu_pvr);
+
+#ifdef CONFIG_HOTPLUG_CPU
+int generic_cpu_disable(void);
+void generic_cpu_die(unsigned int cpu);
+void generic_set_cpu_dead(unsigned int cpu);
+void generic_set_cpu_up(unsigned int cpu);
+int generic_check_cpu_restart(unsigned int cpu);
+int is_cpu_dead(unsigned int cpu);
+#else
+#define generic_set_cpu_up(i)	do { } while (0)
+#endif
+
+#ifdef CONFIG_PPC64
+#define raw_smp_processor_id()	(local_paca->paca_index)
+#define hard_smp_processor_id() (get_paca()->hw_cpu_id)
+#else
+/* 32-bit */
+extern int smp_hw_index[];
+
+#define raw_smp_processor_id()		(current_thread_info()->cpu)
+#define hard_smp_processor_id() 	(smp_hw_index[smp_processor_id()])
+
+static inline int get_hard_smp_processor_id(int cpu)
+{
+	return smp_hw_index[cpu];
+}
+
+static inline void set_hard_smp_processor_id(int cpu, int phys)
+{
+	smp_hw_index[cpu] = phys;
+}
+#endif
+
+DECLARE_PER_CPU(cpumask_var_t, cpu_sibling_map);
+DECLARE_PER_CPU(cpumask_var_t, cpu_l2_cache_map);
+DECLARE_PER_CPU(cpumask_var_t, cpu_core_map);
+DECLARE_PER_CPU(cpumask_var_t, cpu_smallcore_map);
+
+static inline struct cpumask *cpu_sibling_mask(int cpu)
+{
+	return per_cpu(cpu_sibling_map, cpu);
+}
+
+static inline struct cpumask *cpu_core_mask(int cpu)
+{
+	return per_cpu(cpu_core_map, cpu);
+}
+
+static inline struct cpumask *cpu_l2_cache_mask(int cpu)
+{
+	return per_cpu(cpu_l2_cache_map, cpu);
+}
+
+static inline struct cpumask *cpu_smallcore_mask(int cpu)
+{
+	return per_cpu(cpu_smallcore_map, cpu);
+}
+
+extern int cpu_to_core_id(int cpu);
+
+extern bool has_big_cores;
+extern bool thread_group_shares_l2;
+extern bool thread_group_shares_l3;
+
+#define cpu_smt_mask cpu_smt_mask
+#ifdef CONFIG_SCHED_SMT
+static inline const struct cpumask *cpu_smt_mask(int cpu)
+{
+	if (has_big_cores)
+		return per_cpu(cpu_smallcore_map, cpu);
+
+	return per_cpu(cpu_sibling_map, cpu);
+}
+#endif /* CONFIG_SCHED_SMT */
+
+/* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
+ *
+ * Make sure this matches openpic_request_IPIs in open_pic.c, or what shows up
+ * in /proc/interrupts will be wrong!!! --Troy */
+#define PPC_MSG_CALL_FUNCTION	0
+#define PPC_MSG_RESCHEDULE	1
+#define PPC_MSG_TICK_BROADCAST	2
+#define PPC_MSG_NMI_IPI		3
+
+/* This is only used by the powernv kernel */
+#define PPC_MSG_RM_HOST_ACTION	4
+
+#define NMI_IPI_ALL_OTHERS		-2
+
+#ifdef CONFIG_NMI_IPI
+extern int smp_handle_nmi_ipi(struct pt_regs *regs);
+#else
+static inline int smp_handle_nmi_ipi(struct pt_regs *regs) { return 0; }
+#endif
+
+/* for irq controllers that have dedicated ipis per message (4) */
+extern int smp_request_message_ipi(int virq, int message);
+extern const char *smp_ipi_name[];
+
+/* for irq controllers with only a single ipi */
+extern void smp_muxed_ipi_message_pass(int cpu, int msg);
+extern void smp_muxed_ipi_set_message(int cpu, int msg);
+extern irqreturn_t smp_ipi_demux(void);
+extern irqreturn_t smp_ipi_demux_relaxed(void);
+
+void smp_init_pSeries(void);
+void smp_init_cell(void);
+void smp_setup_cpu_maps(void);
+
+extern int __cpu_disable(void);
+extern void __cpu_die(unsigned int cpu);
+
+#else
+/* for UP */
+#define hard_smp_processor_id()		get_hard_smp_processor_id(0)
+#define smp_setup_cpu_maps()
+#define thread_group_shares_l2  0
+#define thread_group_shares_l3	0
+static inline const struct cpumask *cpu_sibling_mask(int cpu)
+{
+	return cpumask_of(cpu);
+}
+
+static inline const struct cpumask *cpu_smallcore_mask(int cpu)
+{
+	return cpumask_of(cpu);
+}
+
+static inline const struct cpumask *cpu_l2_cache_mask(int cpu)
+{
+	return cpumask_of(cpu);
+}
+#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_PPC64
+static inline int get_hard_smp_processor_id(int cpu)
+{
+	return paca_ptrs[cpu]->hw_cpu_id;
+}
+
+static inline void set_hard_smp_processor_id(int cpu, int phys)
+{
+	paca_ptrs[cpu]->hw_cpu_id = phys;
+}
+#else
+/* 32-bit */
+#ifndef CONFIG_SMP
+extern int boot_cpuid_phys;
+static inline int get_hard_smp_processor_id(int cpu)
+{
+	return boot_cpuid_phys;
+}
+
+static inline void set_hard_smp_processor_id(int cpu, int phys)
+{
+	boot_cpuid_phys = phys;
+}
+#endif /* !CONFIG_SMP */
+#endif /* !CONFIG_PPC64 */
+
+#if defined(CONFIG_PPC64) && (defined(CONFIG_SMP) || defined(CONFIG_KEXEC_CORE))
+extern void smp_release_cpus(void);
+#else
+static inline void smp_release_cpus(void) { }
+#endif
+
+extern int smt_enabled_at_boot;
+
+extern void smp_mpic_probe(void);
+extern void smp_mpic_setup_cpu(int cpu);
+extern int smp_generic_kick_cpu(int nr);
+extern int smp_generic_cpu_bootable(unsigned int nr);
+
+
+extern void smp_generic_give_timebase(void);
+extern void smp_generic_take_timebase(void);
+
+extern struct smp_ops_t *smp_ops;
+
+extern void arch_send_call_function_single_ipi(int cpu);
+extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
+
+/* Definitions relative to the secondary CPU spin loop
+ * and entry point. Not all of them exist on both 32 and
+ * 64-bit but defining them all here doesn't harm
+ */
+extern void generic_secondary_smp_init(void);
+extern unsigned long __secondary_hold_spinloop;
+extern unsigned long __secondary_hold_acknowledge;
+extern char __secondary_hold;
+extern unsigned int booting_thread_hwid;
+
+extern void __early_start(void);
+#endif /* __ASSEMBLY__ */
+
+#endif /* __KERNEL__ */
+#endif /* _ASM_POWERPC_SMP_H) */