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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platsmp.c (851B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * SMP support for R-Mobile / SH-Mobile
      4 *
      5 * Copyright (C) 2010  Magnus Damm
      6 * Copyright (C) 2011  Paul Mundt
      7 *
      8 * Based on vexpress, Copyright (C) 2002 ARM Ltd, All Rights Reserved
      9 */
     10#include <linux/init.h>
     11#include <asm/cacheflush.h>
     12#include <asm/smp_plat.h>
     13#include "common.h"
     14
     15extern unsigned long shmobile_smp_fn[];
     16extern unsigned long shmobile_smp_arg[];
     17extern unsigned long shmobile_smp_mpidr[];
     18
     19void shmobile_smp_hook(unsigned int cpu, unsigned long fn, unsigned long arg)
     20{
     21	shmobile_smp_fn[cpu] = 0;
     22	flush_cache_all();
     23
     24	shmobile_smp_mpidr[cpu] = cpu_logical_map(cpu);
     25	shmobile_smp_fn[cpu] = fn;
     26	shmobile_smp_arg[cpu] = arg;
     27	flush_cache_all();
     28}
     29
     30#ifdef CONFIG_HOTPLUG_CPU
     31bool shmobile_smp_cpu_can_disable(unsigned int cpu)
     32{
     33	return true; /* Hotplug of any CPU is supported */
     34}
     35#endif