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.c (1206B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Smp support for CHRP machines.
      4 *
      5 * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
      6 * deal of code from the sparc and intel versions.
      7 *
      8 * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
      9 *
     10 */
     11
     12#include <linux/kernel.h>
     13#include <linux/sched.h>
     14#include <linux/smp.h>
     15#include <linux/interrupt.h>
     16#include <linux/kernel_stat.h>
     17#include <linux/delay.h>
     18#include <linux/spinlock.h>
     19#include <linux/pgtable.h>
     20
     21#include <asm/ptrace.h>
     22#include <linux/atomic.h>
     23#include <asm/irq.h>
     24#include <asm/page.h>
     25#include <asm/sections.h>
     26#include <asm/io.h>
     27#include <asm/smp.h>
     28#include <asm/machdep.h>
     29#include <asm/mpic.h>
     30#include <asm/rtas.h>
     31
     32static int smp_chrp_kick_cpu(int nr)
     33{
     34	*(unsigned long *)KERNELBASE = nr;
     35	asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
     36
     37	return 0;
     38}
     39
     40static void smp_chrp_setup_cpu(int cpu_nr)
     41{
     42	mpic_setup_this_cpu();
     43}
     44
     45/* CHRP with openpic */
     46struct smp_ops_t chrp_smp_ops = {
     47	.cause_nmi_ipi = NULL,
     48	.message_pass = smp_mpic_message_pass,
     49	.probe = smp_mpic_probe,
     50	.kick_cpu = smp_chrp_kick_cpu,
     51	.setup_cpu = smp_chrp_setup_cpu,
     52	.give_timebase = rtas_give_timebase,
     53	.take_timebase = rtas_take_timebase,
     54};