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Commit 73d05262 authored by Charlie Jenkins's avatar Charlie Jenkins Committed by Palmer Dabbelt
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selftests: riscv: Generalize mm selftests 

The behavior of mmap on riscv is defined to not provide an address that
uses more bits than the hint address, if provided. Make the tests
reflect that.
Signed-off-by: default avatarCharlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20240130-use_mmap_hint_address-v3-2-8a655cfa8bcb@rivosinc.comSigned-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent b5b4287a
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Showing with 67 additions and 86 deletions
tools/testing/selftests/riscv/mm/mmap_bottomup.c
View file @ 73d05262
......@@ -6,30 +6,9 @@
TEST(infinite_rlimit)
{
// Only works on 64 bit
#if __riscv_xlen == 64
struct addresses mmap_addresses;
EXPECT_EQ(BOTTOM_UP, memory_layout());
do_mmaps(&mmap_addresses);
EXPECT_NE(MAP_FAILED, mmap_addresses.no_hint);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_37_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_38_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_46_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_47_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_55_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_56_addr);
EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.no_hint);
EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_37_addr);
EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_38_addr);
EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_46_addr);
EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_47_addr);
EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_55_addr);
EXPECT_GT(1UL << 56, (unsigned long)mmap_addresses.on_56_addr);
#endif
TEST_MMAPS;
}
TEST_HARNESS_MAIN
tools/testing/selftests/riscv/mm/mmap_default.c
View file @ 73d05262
......@@ -6,30 +6,9 @@
TEST(default_rlimit)
{
// Only works on 64 bit
#if __riscv_xlen == 64
struct addresses mmap_addresses;
EXPECT_EQ(TOP_DOWN, memory_layout());
do_mmaps(&mmap_addresses);
EXPECT_NE(MAP_FAILED, mmap_addresses.no_hint);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_37_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_38_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_46_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_47_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_55_addr);
EXPECT_NE(MAP_FAILED, mmap_addresses.on_56_addr);
EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.no_hint);
EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_37_addr);
EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_38_addr);
EXPECT_GT(1UL << 38, (unsigned long)mmap_addresses.on_46_addr);
EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_47_addr);
EXPECT_GT(1UL << 47, (unsigned long)mmap_addresses.on_55_addr);
EXPECT_GT(1UL << 56, (unsigned long)mmap_addresses.on_56_addr);
#endif
TEST_MMAPS;
}
TEST_HARNESS_MAIN
tools/testing/selftests/riscv/mm/mmap_test.h
View file @ 73d05262
......@@ -4,60 +4,83 @@
#include <sys/mman.h>
#include <sys/resource.h>
#include <stddef.h>
#include <strings.h>
#include "../../kselftest_harness.h"
#define TOP_DOWN 0
#define BOTTOM_UP 1
struct addresses {
int *no_hint;
int *on_37_addr;
int *on_38_addr;
int *on_46_addr;
int *on_47_addr;
int *on_55_addr;
int *on_56_addr;
#if __riscv_xlen == 64
uint64_t random_addresses[] = {
0x19764f0d73b3a9f0, 0x016049584cecef59, 0x3580bdd3562f4acd,
0x1164219f20b17da0, 0x07d97fcb40ff2373, 0x76ec528921272ee7,
0x4dd48c38a3de3f70, 0x2e11415055f6997d, 0x14b43334ac476c02,
0x375a60795aff19f6, 0x47f3051725b8ee1a, 0x4e697cf240494a9f,
0x456b59b5c2f9e9d1, 0x101724379d63cb96, 0x7fe9ad31619528c1,
0x2f417247c495c2ea, 0x329a5a5b82943a5e, 0x06d7a9d6adcd3827,
0x327b0b9ee37f62d5, 0x17c7b1851dfd9b76, 0x006ebb6456ec2cd9,
0x00836cd14146a134, 0x00e5c4dcde7126db, 0x004c29feadf75753,
0x00d8b20149ed930c, 0x00d71574c269387a, 0x0006ebe4a82acb7a,
0x0016135df51f471b, 0x00758bdb55455160, 0x00d0bdd949b13b32,
0x00ecea01e7c5f54b, 0x00e37b071b9948b1, 0x0011fdd00ff57ab3,
0x00e407294b52f5ea, 0x00567748c200ed20, 0x000d073084651046,
0x00ac896f4365463c, 0x00eb0d49a0b26216, 0x0066a2564a982a31,
0x002e0d20237784ae, 0x0000554ff8a77a76, 0x00006ce07a54c012,
0x000009570516d799, 0x00000954ca15b84d, 0x0000684f0d453379,
0x00002ae5816302b5, 0x0000042403fb54bf, 0x00004bad7392bf30,
0x00003e73bfa4b5e3, 0x00005442c29978e0, 0x00002803f11286b6,
0x000073875d745fc6, 0x00007cede9cb8240, 0x000027df84cc6a4f,
0x00006d7e0e74242a, 0x00004afd0b836e02, 0x000047d0e837cd82,
0x00003b42405efeda, 0x00001531bafa4c95, 0x00007172cae34ac4,
};
#else
uint32_t random_addresses[] = {
0x8dc302e0, 0x929ab1e0, 0xb47683ba, 0xea519c73, 0xa19f1c90, 0xc49ba213,
0x8f57c625, 0xadfe5137, 0x874d4d95, 0xaa20f09d, 0xcf21ebfc, 0xda7737f1,
0xcedf392a, 0x83026c14, 0xccedca52, 0xc6ccf826, 0xe0cd9415, 0x997472ca,
0xa21a44c1, 0xe82196f5, 0xa23fd66b, 0xc28d5590, 0xd009cdce, 0xcf0be646,
0x8fc8c7ff, 0xe2a85984, 0xa3d3236b, 0x89a0619d, 0xc03db924, 0xb5d4cc1b,
0xb96ee04c, 0xd191da48, 0xb432a000, 0xaa2bebbc, 0xa2fcb289, 0xb0cca89b,
0xb0c18d6a, 0x88f58deb, 0xa4d42d1c, 0xe4d74e86, 0x99902b09, 0x8f786d31,
0xbec5e381, 0x9a727e65, 0xa9a65040, 0xa880d789, 0x8f1b335e, 0xfc821c1e,
0x97e34be4, 0xbbef84ed, 0xf447d197, 0xfd7ceee2, 0xe632348d, 0xee4590f4,
0x958992a5, 0xd57e05d6, 0xfd240970, 0xc5b0dcff, 0xd96da2c2, 0xa7ae041d,
};
#endif
static inline void do_mmaps(struct addresses *mmap_addresses)
{
/*
* Place all of the hint addresses on the boundaries of mmap
* sv39, sv48, sv57
* User addresses end at 1<<38, 1<<47, 1<<56 respectively
*/
void *on_37_bits = (void *)(1UL << 37);
void *on_38_bits = (void *)(1UL << 38);
void *on_46_bits = (void *)(1UL << 46);
void *on_47_bits = (void *)(1UL << 47);
void *on_55_bits = (void *)(1UL << 55);
void *on_56_bits = (void *)(1UL << 56);
#define PROT (PROT_READ | PROT_WRITE)
#define FLAGS (MAP_PRIVATE | MAP_ANONYMOUS)
int prot = PROT_READ | PROT_WRITE;
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
/* mmap must return a value that doesn't use more bits than the hint address. */
static inline unsigned long get_max_value(unsigned long input)
{
unsigned long max_bit = (1UL << (((sizeof(unsigned long) * 8) - 1 -
__builtin_clzl(input))));
mmap_addresses->no_hint =
mmap(NULL, 5 * sizeof(int), prot, flags, 0, 0);
mmap_addresses->on_37_addr =
mmap(on_37_bits, 5 * sizeof(int), prot, flags, 0, 0);
mmap_addresses->on_38_addr =
mmap(on_38_bits, 5 * sizeof(int), prot, flags, 0, 0);
mmap_addresses->on_46_addr =
mmap(on_46_bits, 5 * sizeof(int), prot, flags, 0, 0);
mmap_addresses->on_47_addr =
mmap(on_47_bits, 5 * sizeof(int), prot, flags, 0, 0);
mmap_addresses->on_55_addr =
mmap(on_55_bits, 5 * sizeof(int), prot, flags, 0, 0);
mmap_addresses->on_56_addr =
mmap(on_56_bits, 5 * sizeof(int), prot, flags, 0, 0);
return max_bit + (max_bit - 1);
}
#define TEST_MMAPS \
({ \
void *mmap_addr; \
for (int i = 0; i < ARRAY_SIZE(random_addresses); i++) { \
mmap_addr = mmap((void *)random_addresses[i], \
5 * sizeof(int), PROT, FLAGS, 0, 0); \
EXPECT_NE(MAP_FAILED, mmap_addr); \
EXPECT_GE((void *)get_max_value(random_addresses[i]), \
mmap_addr); \
mmap_addr = mmap((void *)random_addresses[i], \
5 * sizeof(int), PROT, FLAGS, 0, 0); \
EXPECT_NE(MAP_FAILED, mmap_addr); \
EXPECT_GE((void *)get_max_value(random_addresses[i]), \
mmap_addr); \
} \
})
static inline int memory_layout(void)
{
int prot = PROT_READ | PROT_WRITE;
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
void *value1 = mmap(NULL, sizeof(int), prot, flags, 0, 0);
void *value2 = mmap(NULL, sizeof(int), prot, flags, 0, 0);
void *value1 = mmap(NULL, sizeof(int), PROT, FLAGS, 0, 0);
void *value2 = mmap(NULL, sizeof(int), PROT, FLAGS, 0, 0);
return value2 > value1;
}
......
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