1 // SPDX-License-Identifier: GPL-2.0-only
25 /* Reserve space for rb, aux with space for shrink-beyond-vma testing. */
32 #define EVENT_SRC_DIR	"/sys/bus/event_source/devices"
43 	bool		aux;  in FIXTURE_VARIANT()  local
49 	.aux = false,  in FIXTURE_VARIANT_ADD()
53 FIXTURE_VARIANT_ADD(perf_mmap, aux)  in FIXTURE_VARIANT_ADD()  argument
55 	.aux = true,  in FIXTURE_VARIANT_ADD()
65 	snprintf(typefn, sizeof(typefn), "%s/%s/type", EVENT_SRC_DIR, dent->d_name);  in read_event_type()
87 	void *aux, *region;  in FIXTURE_SETUP()  local
90 	self->ptr = NULL;  in FIXTURE_SETUP()
96 	region = mmap(NULL, REGION_SIZE, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);  in FIXTURE_SETUP()
98 	self->region = region;  in FIXTURE_SETUP()
107 		fd = syscall(SYS_perf_event_open, &attr, 0, -1, -1, 0);  in FIXTURE_SETUP()
122 			// Save the event in case that no AUX capable event is found  in FIXTURE_SETUP()
127 		if (!variant->aux)  in FIXTURE_SETUP()
130 		rb->aux_offset = AUX_OFFS;  in FIXTURE_SETUP()
131 		rb->aux_size = AUX_SIZE;  in FIXTURE_SETUP()
133 		// Check whether it supports a AUX buffer  in FIXTURE_SETUP()
134 		aux = mmap(region + REGION_AUX_OFFS, AUX_SIZE, PROT_READ | PROT_WRITE,  in FIXTURE_SETUP()
136 		if (aux == MAP_FAILED) {  in FIXTURE_SETUP()
144 		munmap(aux, AUX_SIZE);  in FIXTURE_SETUP()
158 	self->fd = syscall(SYS_perf_event_open, &attr_ok, 0, -1, -1, 0);  in FIXTURE_SETUP()
159 	ASSERT_NE(self->fd, -1);  in FIXTURE_SETUP()
161 	rb = mmap(region, RB_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_FIXED, self->fd, 0);  in FIXTURE_SETUP()
164 	if (!variant->aux) {  in FIXTURE_SETUP()
165 		self->ptr = rb;  in FIXTURE_SETUP()
170 		SKIP(return, "No AUX event found.");  in FIXTURE_SETUP()
172 	rb->aux_offset = AUX_OFFS;  in FIXTURE_SETUP()
173 	rb->aux_size = AUX_SIZE;  in FIXTURE_SETUP()
174 	aux = mmap(region + REGION_AUX_OFFS, AUX_SIZE, PROT_READ | PROT_WRITE,  in FIXTURE_SETUP()
175 		   MAP_SHARED | MAP_FIXED, self->fd, AUX_OFFS);  in FIXTURE_SETUP()
176 	ASSERT_NE(aux, MAP_FAILED);  in FIXTURE_SETUP()
177 	self->ptr = aux;  in FIXTURE_SETUP()
182 	ASSERT_EQ(munmap(self->region, REGION_SIZE), 0);  in FIXTURE_TEARDOWN()
183 	if (self->fd != -1)  in FIXTURE_TEARDOWN()
184 		ASSERT_EQ(close(self->fd), 0);  in FIXTURE_TEARDOWN()
189 	void *tmp, *ptr = self->ptr;  in TEST_F()
190 	unsigned long size = variant->ptr_size;  in TEST_F()
195 	ASSERT_EQ(mremap(ptr + size - HOLE_SIZE, HOLE_SIZE, size, MREMAP_MAYMOVE), MAP_FAILED);  in TEST_F()
198 	ASSERT_NE(mremap(ptr + size - HOLE_SIZE, size, HOLE_SIZE, MREMAP_MAYMOVE), MAP_FAILED);  in TEST_F()
201 	tmp = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);  in TEST_F()
205 	ASSERT_EQ(mremap(ptr + HOLE_SIZE, size - HOLE_SIZE, size - HOLE_SIZE,  in TEST_F()
215 	unsigned long size = variant->ptr_size;  in TEST_F()
218 	ASSERT_NE(munmap(self->ptr, HOLE_SIZE), 0);  in TEST_F()
219 	ASSERT_NE(munmap(self->ptr + HOLE_SIZE, HOLE_SIZE), 0);  in TEST_F()
220 	ASSERT_NE(munmap(self->ptr + size - HOLE_SIZE, HOLE_SIZE), 0);  in TEST_F()
225 	unsigned long size = variant->ptr_size;  in TEST_F()
228 	ASSERT_EQ(mmap(self->ptr, HOLE_SIZE, PROT_READ | PROT_WRITE,  in TEST_F()
229 		       MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0), MAP_FAILED);  in TEST_F()
230 	ASSERT_EQ(mmap(self->ptr + HOLE_SIZE, HOLE_SIZE, PROT_READ | PROT_WRITE,  in TEST_F()
231 		       MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0), MAP_FAILED);  in TEST_F()
232 	ASSERT_EQ(mmap(self->ptr + size - HOLE_SIZE, HOLE_SIZE, PROT_READ | PROT_WRITE,  in TEST_F()
233 		       MAP_PRIVATE | MAP_ANON | MAP_FIXED, -1, 0), MAP_FAILED);  in TEST_F()