Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * Copyright (C) 2014 Stefan Kristiansson <stefan.kristiansson@saunalahti.fi>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2017 Stafford Horne <shorne@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Based on arm64 and arc implementations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Copyright (C) 2013 ARM Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * This file is licensed under the terms of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * version 2.  This program is licensed "as is" without any warranty of any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  * kind, whether express or implied.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/sched/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <asm/cpuinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <asm/mmu_context.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <asm/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) static void (*smp_cross_call)(const struct cpumask *, unsigned int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) unsigned long secondary_release = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) struct thread_info *secondary_thread_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) enum ipi_msg_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	IPI_WAKEUP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	IPI_RESCHEDULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	IPI_CALL_FUNC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	IPI_CALL_FUNC_SINGLE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static DEFINE_SPINLOCK(boot_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) static void boot_secondary(unsigned int cpu, struct task_struct *idle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	 * set synchronisation state between this boot processor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	 * and the secondary one
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	spin_lock(&boot_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	secondary_release = cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	smp_cross_call(cpumask_of(cpu), IPI_WAKEUP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	 * now the secondary core is starting up let it run its
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	 * calibrations, then wait for it to finish
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	spin_unlock(&boot_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) void __init smp_prepare_boot_cpu(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) void __init smp_init_cpus(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	for (i = 0; i < NR_CPUS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		set_cpu_possible(i, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) void __init smp_prepare_cpus(unsigned int max_cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	 * Initialise the present map, which describes the set of CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	 * actually populated at the present time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	for (i = 0; i < max_cpus; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 		set_cpu_present(i, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) void __init smp_cpus_done(unsigned int max_cpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) static DECLARE_COMPLETION(cpu_running);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) int __cpu_up(unsigned int cpu, struct task_struct *idle)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	if (smp_cross_call == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 		pr_warn("CPU%u: failed to start, IPI controller missing",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 			cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	secondary_thread_info = task_thread_info(idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	current_pgd[cpu] = init_mm.pgd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	boot_secondary(cpu, idle);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	if (!wait_for_completion_timeout(&cpu_running,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 					msecs_to_jiffies(1000))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		pr_crit("CPU%u: failed to start\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	synchronise_count_master(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) asmlinkage __init void secondary_start_kernel(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	struct mm_struct *mm = &init_mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	unsigned int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	 * All kernel threads share the same mm context; grab a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	 * reference and switch to it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	mmgrab(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	current->active_mm = mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	cpumask_set_cpu(cpu, mm_cpumask(mm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	pr_info("CPU%u: Booted secondary processor\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	setup_cpuinfo();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	openrisc_clockevent_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	notify_cpu_starting(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	 * OK, now it's safe to let the boot CPU continue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	complete(&cpu_running);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	synchronise_count_slave(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	set_cpu_online(cpu, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	 * OK, it's off to the idle thread for us
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	cpu_startup_entry(CPUHP_AP_ONLINE_IDLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) void handle_IPI(unsigned int ipi_msg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	unsigned int cpu = smp_processor_id();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	switch (ipi_msg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	case IPI_WAKEUP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	case IPI_RESCHEDULE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 		scheduler_ipi();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	case IPI_CALL_FUNC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		generic_smp_call_function_interrupt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	case IPI_CALL_FUNC_SINGLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		generic_smp_call_function_single_interrupt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		WARN(1, "CPU%u: Unknown IPI message 0x%x\n", cpu, ipi_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) void smp_send_reschedule(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	smp_cross_call(cpumask_of(cpu), IPI_RESCHEDULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) static void stop_this_cpu(void *dummy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	/* Remove this CPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	set_cpu_online(smp_processor_id(), false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	/* CPU Doze */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	if (mfspr(SPR_UPR) & SPR_UPR_PMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		mtspr(SPR_PMR, mfspr(SPR_PMR) | SPR_PMR_DME);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	/* If that didn't work, infinite loop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	while (1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) void smp_send_stop(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	smp_call_function(stop_this_cpu, NULL, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* not supported, yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) int setup_profiling_timer(unsigned int multiplier)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	smp_cross_call = fn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) void arch_send_call_function_single_ipi(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	smp_cross_call(cpumask_of(cpu), IPI_CALL_FUNC_SINGLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) void arch_send_call_function_ipi_mask(const struct cpumask *mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	smp_cross_call(mask, IPI_CALL_FUNC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* TLB flush operations - Performed on each CPU*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) static inline void ipi_flush_tlb_all(void *ignored)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	local_flush_tlb_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) static inline void ipi_flush_tlb_mm(void *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	struct mm_struct *mm = (struct mm_struct *)info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	local_flush_tlb_mm(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) static void smp_flush_tlb_mm(struct cpumask *cmask, struct mm_struct *mm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	unsigned int cpuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	if (cpumask_empty(cmask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	cpuid = get_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 		/* local cpu is the only cpu present in cpumask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		local_flush_tlb_mm(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		on_each_cpu_mask(cmask, ipi_flush_tlb_mm, mm, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	put_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) struct flush_tlb_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	unsigned long addr1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	unsigned long addr2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) static inline void ipi_flush_tlb_page(void *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	local_flush_tlb_page(NULL, fd->addr1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) static inline void ipi_flush_tlb_range(void *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	struct flush_tlb_data *fd = (struct flush_tlb_data *)info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	local_flush_tlb_range(NULL, fd->addr1, fd->addr2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) static void smp_flush_tlb_range(const struct cpumask *cmask, unsigned long start,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 				unsigned long end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	unsigned int cpuid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	if (cpumask_empty(cmask))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	cpuid = get_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	if (cpumask_any_but(cmask, cpuid) >= nr_cpu_ids) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		/* local cpu is the only cpu present in cpumask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		if ((end - start) <= PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 			local_flush_tlb_page(NULL, start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 			local_flush_tlb_range(NULL, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 		struct flush_tlb_data fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 		fd.addr1 = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 		fd.addr2 = end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		if ((end - start) <= PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 			on_each_cpu_mask(cmask, ipi_flush_tlb_page, &fd, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 			on_each_cpu_mask(cmask, ipi_flush_tlb_range, &fd, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	put_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) void flush_tlb_all(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	on_each_cpu(ipi_flush_tlb_all, NULL, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) void flush_tlb_mm(struct mm_struct *mm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	smp_flush_tlb_mm(mm_cpumask(mm), mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) void flush_tlb_page(struct vm_area_struct *vma, unsigned long uaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	smp_flush_tlb_range(mm_cpumask(vma->vm_mm), uaddr, uaddr + PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) void flush_tlb_range(struct vm_area_struct *vma,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		     unsigned long start, unsigned long end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	const struct cpumask *cmask = vma ? mm_cpumask(vma->vm_mm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 					  : cpu_online_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	smp_flush_tlb_range(cmask, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) /* Instruction cache invalidate - performed on each cpu */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static void ipi_icache_page_inv(void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	struct page *page = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	local_icache_page_inv(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) void smp_icache_page_inv(struct page *page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	on_each_cpu(ipi_icache_page_inv, page, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) EXPORT_SYMBOL(smp_icache_page_inv);