cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

platsmp.c (941B)

      1// SPDX-License-Identifier: GPL-2.0-or-later
      2/*
      3 * SMP operations for Alpine platform.
      4 *
      5 * Copyright (C) 2015 Annapurna Labs Ltd.
      6 */
      7
      8#include <linux/init.h>
      9#include <linux/errno.h>
     10#include <linux/io.h>
     11#include <linux/of.h>
     12
     13#include <asm/smp_plat.h>
     14
     15#include "alpine_cpu_pm.h"
     16
     17static int alpine_boot_secondary(unsigned int cpu, struct task_struct *idle)
     18{
     19	phys_addr_t addr;
     20
     21	addr = __pa_symbol(secondary_startup);
     22
     23	if (addr > (phys_addr_t)(uint32_t)(-1)) {
     24		pr_err("FAIL: resume address over 32bit (%pa)", &addr);
     25		return -EINVAL;
     26	}
     27
     28	return alpine_cpu_wakeup(cpu_logical_map(cpu), (uint32_t)addr);
     29}
     30
     31static void __init alpine_smp_prepare_cpus(unsigned int max_cpus)
     32{
     33	alpine_cpu_pm_init();
     34}
     35
     36static const struct smp_operations alpine_smp_ops __initconst = {
     37	.smp_prepare_cpus	= alpine_smp_prepare_cpus,
     38	.smp_boot_secondary	= alpine_boot_secondary,
     39};
     40CPU_METHOD_OF_DECLARE(alpine_smp, "al,alpine-smp", &alpine_smp_ops);