add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/tools/testing/selftests/powerpc/ptrace/perf-hwbreak.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * perf events self profiling example test case for hw breakpoints.
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  *
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@@ -14,11 +15,6 @@
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  *   http://ozlabs.org/~anton/junkcode/perf_events_example1.c
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  *
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  * Copyright (C) 2018 Michael Neuling, IBM Corporation.
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version
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- * 2 of the License, or (at your option) any later version.
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  */
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 #include <unistd.h>
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@@ -152,6 +148,121 @@
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 	return 0;
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 }
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+static int runtest_dar_outside(void)
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+{
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+	void *target;
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+	volatile __u16 temp16;
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+	volatile __u64 temp64;
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+	struct perf_event_attr attr;
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+	int break_fd;
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+	unsigned long long breaks;
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+	int fail = 0;
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+	size_t res;
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+
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+	target = malloc(8);
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+	if (!target) {
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+		perror("malloc failed");
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+		exit(EXIT_FAILURE);
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+	}
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+
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+	/* setup counters */
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+	memset(&attr, 0, sizeof(attr));
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+	attr.disabled = 1;
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+	attr.type = PERF_TYPE_BREAKPOINT;
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+	attr.exclude_kernel = 1;
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+	attr.exclude_hv = 1;
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+	attr.exclude_guest = 1;
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+	attr.bp_type = HW_BREAKPOINT_RW;
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+	/* watch middle half of target array */
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+	attr.bp_addr = (__u64)(target + 2);
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+	attr.bp_len = 4;
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+	break_fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
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+	if (break_fd < 0) {
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+		free(target);
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+		perror("sys_perf_event_open");
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+		exit(EXIT_FAILURE);
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+	}
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+
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+	/* Shouldn't hit. */
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+	ioctl(break_fd, PERF_EVENT_IOC_RESET);
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+	ioctl(break_fd, PERF_EVENT_IOC_ENABLE);
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+	temp16 = *((__u16 *)target);
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+	*((__u16 *)target) = temp16;
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+	ioctl(break_fd, PERF_EVENT_IOC_DISABLE);
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+	res = read(break_fd, &breaks, sizeof(unsigned long long));
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+	assert(res == sizeof(unsigned long long));
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+	if (breaks == 0) {
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+		printf("TESTED: No overlap\n");
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+	} else {
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+		printf("FAILED: No overlap: %lld != 0\n", breaks);
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+		fail = 1;
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+	}
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+
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+	/* Hit */
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+	ioctl(break_fd, PERF_EVENT_IOC_RESET);
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+	ioctl(break_fd, PERF_EVENT_IOC_ENABLE);
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+	temp16 = *((__u16 *)(target + 1));
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+	*((__u16 *)(target + 1)) = temp16;
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+	ioctl(break_fd, PERF_EVENT_IOC_DISABLE);
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+	res = read(break_fd, &breaks, sizeof(unsigned long long));
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+	assert(res == sizeof(unsigned long long));
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+	if (breaks == 2) {
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+		printf("TESTED: Partial overlap\n");
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+	} else {
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+		printf("FAILED: Partial overlap: %lld != 2\n", breaks);
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+		fail = 1;
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+	}
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+
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+	/* Hit */
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+	ioctl(break_fd, PERF_EVENT_IOC_RESET);
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+	ioctl(break_fd, PERF_EVENT_IOC_ENABLE);
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+	temp16 = *((__u16 *)(target + 5));
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+	*((__u16 *)(target + 5)) = temp16;
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+	ioctl(break_fd, PERF_EVENT_IOC_DISABLE);
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+	res = read(break_fd, &breaks, sizeof(unsigned long long));
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+	assert(res == sizeof(unsigned long long));
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+	if (breaks == 2) {
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+		printf("TESTED: Partial overlap\n");
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+	} else {
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+		printf("FAILED: Partial overlap: %lld != 2\n", breaks);
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+		fail = 1;
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+	}
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+
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+	/* Shouldn't Hit */
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+	ioctl(break_fd, PERF_EVENT_IOC_RESET);
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+	ioctl(break_fd, PERF_EVENT_IOC_ENABLE);
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+	temp16 = *((__u16 *)(target + 6));
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+	*((__u16 *)(target + 6)) = temp16;
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+	ioctl(break_fd, PERF_EVENT_IOC_DISABLE);
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+	res = read(break_fd, &breaks, sizeof(unsigned long long));
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+	assert(res == sizeof(unsigned long long));
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+	if (breaks == 0) {
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+		printf("TESTED: No overlap\n");
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+	} else {
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+		printf("FAILED: No overlap: %lld != 0\n", breaks);
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+		fail = 1;
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+	}
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+
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+	/* Hit */
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+	ioctl(break_fd, PERF_EVENT_IOC_RESET);
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+	ioctl(break_fd, PERF_EVENT_IOC_ENABLE);
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+	temp64 = *((__u64 *)target);
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+	*((__u64 *)target) = temp64;
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+	ioctl(break_fd, PERF_EVENT_IOC_DISABLE);
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+	res = read(break_fd, &breaks, sizeof(unsigned long long));
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+	assert(res == sizeof(unsigned long long));
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+	if (breaks == 2) {
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+		printf("TESTED: Full overlap\n");
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+	} else {
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+		printf("FAILED: Full overlap: %lld != 2\n", breaks);
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+		fail = 1;
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+	}
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+
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+	free(target);
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+	close(break_fd);
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+	return fail;
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+}
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+
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 static int runtest(void)
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 {
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 	int rwflag;
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 				return ret;
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 		}
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 	}
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-	return 0;
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+
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+	ret = runtest_dar_outside();
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+	return ret;
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 }
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