cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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smp.h (2514B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 * SMP Support
      4 *
      5 * Copyright (C) 1999 VA Linux Systems
      6 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
      7 * (c) Copyright 2001-2003, 2005 Hewlett-Packard Development Company, L.P.
      8 *	David Mosberger-Tang <davidm@hpl.hp.com>
      9 *	Bjorn Helgaas <bjorn.helgaas@hp.com>
     10 */
     11#ifndef _ASM_IA64_SMP_H
     12#define _ASM_IA64_SMP_H
     13
     14#include <linux/init.h>
     15#include <linux/threads.h>
     16#include <linux/kernel.h>
     17#include <linux/cpumask.h>
     18#include <linux/bitops.h>
     19#include <linux/irqreturn.h>
     20
     21#include <asm/param.h>
     22#include <asm/processor.h>
     23#include <asm/ptrace.h>
     24
     25static inline unsigned int
     26ia64_get_lid (void)
     27{
     28	union {
     29		struct {
     30			unsigned long reserved : 16;
     31			unsigned long eid : 8;
     32			unsigned long id : 8;
     33			unsigned long ignored : 32;
     34		} f;
     35		unsigned long bits;
     36	} lid;
     37
     38	lid.bits = ia64_getreg(_IA64_REG_CR_LID);
     39	return lid.f.id << 8 | lid.f.eid;
     40}
     41
     42#define hard_smp_processor_id()		ia64_get_lid()
     43
     44#ifdef CONFIG_SMP
     45
     46#define raw_smp_processor_id() (current_thread_info()->cpu)
     47
     48extern struct smp_boot_data {
     49	int cpu_count;
     50	int cpu_phys_id[NR_CPUS];
     51} smp_boot_data __initdata;
     52
     53extern char no_int_routing;
     54
     55extern cpumask_t cpu_core_map[NR_CPUS];
     56DECLARE_PER_CPU_SHARED_ALIGNED(cpumask_t, cpu_sibling_map);
     57extern int smp_num_siblings;
     58extern void __iomem *ipi_base_addr;
     59
     60extern volatile int ia64_cpu_to_sapicid[];
     61#define cpu_physical_id(i)	ia64_cpu_to_sapicid[i]
     62
     63extern unsigned long ap_wakeup_vector;
     64
     65/*
     66 * Function to map hard smp processor id to logical id.  Slow, so don't use this in
     67 * performance-critical code.
     68 */
     69static inline int
     70cpu_logical_id (int cpuid)
     71{
     72	int i;
     73
     74	for (i = 0; i < NR_CPUS; ++i)
     75		if (cpu_physical_id(i) == cpuid)
     76			break;
     77	return i;
     78}
     79
     80/* Upping and downing of CPUs */
     81extern int __cpu_disable (void);
     82extern void __cpu_die (unsigned int cpu);
     83extern void cpu_die (void) __attribute__ ((noreturn));
     84extern void __init smp_build_cpu_map(void);
     85
     86extern void __init init_smp_config (void);
     87extern void smp_do_timer (struct pt_regs *regs);
     88
     89extern irqreturn_t handle_IPI(int irq, void *dev_id);
     90extern void smp_send_reschedule (int cpu);
     91extern void identify_siblings (struct cpuinfo_ia64 *);
     92extern int is_multithreading_enabled(void);
     93
     94extern void arch_send_call_function_single_ipi(int cpu);
     95extern void arch_send_call_function_ipi_mask(const struct cpumask *mask);
     96
     97#else /* CONFIG_SMP */
     98
     99#define cpu_logical_id(i)		0
    100#define cpu_physical_id(i)		ia64_get_lid()
    101
    102#endif /* CONFIG_SMP */
    103#endif /* _ASM_IA64_SMP_H */