From 01573e231f18eb2d99162747186f59511f56b64d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 08 Dec 2023 10:40:48 +0000
Subject: [PATCH] 移去rt
---
kernel/tools/testing/selftests/powerpc/utils.c | 169 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 168 insertions(+), 1 deletions(-)
diff --git a/kernel/tools/testing/selftests/powerpc/utils.c b/kernel/tools/testing/selftests/powerpc/utils.c
index ba0959d..1f36ee1 100644
--- a/kernel/tools/testing/selftests/powerpc/utils.c
+++ b/kernel/tools/testing/selftests/powerpc/utils.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2013-2015, Michael Ellerman, IBM Corp.
- * Licensed under GPLv2.
*/
#define _GNU_SOURCE /* For CPU_ZERO etc. */
@@ -11,12 +11,16 @@
#include <link.h>
#include <sched.h>
#include <stdio.h>
+#include <stdlib.h>
#include <string.h>
+#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/sysinfo.h>
#include <sys/types.h>
#include <sys/utsname.h>
#include <unistd.h>
+#include <asm/unistd.h>
+#include <linux/limits.h>
#include "utils.h"
@@ -134,3 +138,166 @@
return strcmp(uts.machine, "ppc64le") == 0;
}
+
+int read_sysfs_file(char *fpath, char *result, size_t result_size)
+{
+ char path[PATH_MAX] = "/sys/";
+ int rc = -1, fd;
+
+ strncat(path, fpath, PATH_MAX - strlen(path) - 1);
+
+ if ((fd = open(path, O_RDONLY)) < 0)
+ return rc;
+
+ rc = read(fd, result, result_size);
+
+ close(fd);
+
+ if (rc < 0)
+ return rc;
+
+ return 0;
+}
+
+int read_debugfs_file(char *debugfs_file, int *result)
+{
+ int rc = -1, fd;
+ char path[PATH_MAX];
+ char value[16];
+
+ strcpy(path, "/sys/kernel/debug/");
+ strncat(path, debugfs_file, PATH_MAX - strlen(path) - 1);
+
+ if ((fd = open(path, O_RDONLY)) < 0)
+ return rc;
+
+ if ((rc = read(fd, value, sizeof(value))) < 0)
+ return rc;
+
+ value[15] = 0;
+ *result = atoi(value);
+ close(fd);
+
+ return 0;
+}
+
+int write_debugfs_file(char *debugfs_file, int result)
+{
+ int rc = -1, fd;
+ char path[PATH_MAX];
+ char value[16];
+
+ strcpy(path, "/sys/kernel/debug/");
+ strncat(path, debugfs_file, PATH_MAX - strlen(path) - 1);
+
+ if ((fd = open(path, O_WRONLY)) < 0)
+ return rc;
+
+ snprintf(value, 16, "%d", result);
+
+ if ((rc = write(fd, value, strlen(value))) < 0)
+ return rc;
+
+ close(fd);
+
+ return 0;
+}
+
+static long perf_event_open(struct perf_event_attr *hw_event, pid_t pid,
+ int cpu, int group_fd, unsigned long flags)
+{
+ return syscall(__NR_perf_event_open, hw_event, pid, cpu,
+ group_fd, flags);
+}
+
+static void perf_event_attr_init(struct perf_event_attr *event_attr,
+ unsigned int type,
+ unsigned long config)
+{
+ memset(event_attr, 0, sizeof(*event_attr));
+
+ event_attr->type = type;
+ event_attr->size = sizeof(struct perf_event_attr);
+ event_attr->config = config;
+ event_attr->read_format = PERF_FORMAT_GROUP;
+ event_attr->disabled = 1;
+ event_attr->exclude_kernel = 1;
+ event_attr->exclude_hv = 1;
+ event_attr->exclude_guest = 1;
+}
+
+int perf_event_open_counter(unsigned int type,
+ unsigned long config, int group_fd)
+{
+ int fd;
+ struct perf_event_attr event_attr;
+
+ perf_event_attr_init(&event_attr, type, config);
+
+ fd = perf_event_open(&event_attr, 0, -1, group_fd, 0);
+
+ if (fd < 0)
+ perror("perf_event_open() failed");
+
+ return fd;
+}
+
+int perf_event_enable(int fd)
+{
+ if (ioctl(fd, PERF_EVENT_IOC_ENABLE, PERF_IOC_FLAG_GROUP) == -1) {
+ perror("error while enabling perf events");
+ return -1;
+ }
+
+ return 0;
+}
+
+int perf_event_disable(int fd)
+{
+ if (ioctl(fd, PERF_EVENT_IOC_DISABLE, PERF_IOC_FLAG_GROUP) == -1) {
+ perror("error disabling perf events");
+ return -1;
+ }
+
+ return 0;
+}
+
+int perf_event_reset(int fd)
+{
+ if (ioctl(fd, PERF_EVENT_IOC_RESET, PERF_IOC_FLAG_GROUP) == -1) {
+ perror("error resetting perf events");
+ return -1;
+ }
+
+ return 0;
+}
+
+int using_hash_mmu(bool *using_hash)
+{
+ char line[128];
+ FILE *f;
+ int rc;
+
+ f = fopen("/proc/cpuinfo", "r");
+ FAIL_IF(!f);
+
+ rc = 0;
+ while (fgets(line, sizeof(line), f) != NULL) {
+ if (!strcmp(line, "MMU : Hash\n") ||
+ !strcmp(line, "platform : Cell\n") ||
+ !strcmp(line, "platform : PowerMac\n")) {
+ *using_hash = true;
+ goto out;
+ }
+
+ if (strcmp(line, "MMU : Radix\n") == 0) {
+ *using_hash = false;
+ goto out;
+ }
+ }
+
+ rc = -1;
+out:
+ fclose(f);
+ return rc;
+}
--
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