// SPDX-License-Identifier: GPL-2.0+ /* * Copyright 2018 IBM Corporation. */ #define __SANE_USERSPACE_TYPES__ #include <sys/types.h>#include <stdint.h>#include <unistd.h>#include <signal.h>#include <stdlib.h>#include <string.h>#include <stdio.h>#include <sys/utsname.h>#include "reg.h"#include "utils.h"#include "flush_utils.h" static inline __u64 load(void *addr){	__u64 tmp; 	asm volatile("ld %0,0(%1)" : "=r"(tmp) : "b"(addr)); 	return tmp;} void syscall_loop(char *p, unsigned long iterations,		  unsigned long zero_size){	for (unsigned long i = 0; i < iterations; i++) {		for (unsigned long j = 0; j < zero_size; j += CACHELINE_SIZE)			load(p + j);		getppid();	}} void syscall_loop_uaccess(char *p, unsigned long iterations,			  unsigned long zero_size){	struct utsname utsname; 	for (unsigned long i = 0; i < iterations; i++) {		for (unsigned long j = 0; j < zero_size; j += CACHELINE_SIZE)			load(p + j);		uname(&utsname);	}} static void sigill_handler(int signr, siginfo_t *info, void *unused){	static int warned;	ucontext_t *ctx = (ucontext_t *)unused;	unsigned long *pc = &UCONTEXT_NIA(ctx); 	/* mtspr 3,RS to check for move to DSCR below */	if ((*((unsigned int *)*pc) & 0xfc1fffff) == 0x7c0303a6) {		if (!warned++)			printf("WARNING: Skipping over dscr setup. Consider running 'ppc64_cpu --dscr=1' manually.\n");		*pc += 4;	} else {		printf("SIGILL at %p\n", pc);		abort();	}} void set_dscr(unsigned long val){	static int init;	struct sigaction sa; 	if (!init) {		memset(&sa, 0, sizeof(sa));		sa.sa_sigaction = sigill_handler;		sa.sa_flags = SA_SIGINFO;		if (sigaction(SIGILL, &sa, NULL))			perror("sigill_handler");		init = 1;	} 	mtspr(SPRN_DSCR, val);}