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selftests: riscv: Generalize mm selftests

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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: Charlie Jenkins <charlie@rivosinc.com>
Link: https://lore.kernel.org/r/20240130-use_mmap_hint_address-v3-2-8a655cfa8bcb@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Charlie Jenkins 2024-01-30 17:07:01 -08:00 committed by Palmer Dabbelt
parent b5b4287acc
commit 73d05262a2
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GPG Key ID: 2E1319F35FBB1889
3 changed files with 67 additions and 86 deletions
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23
tools/testing/selftests/riscv/mm/mmap_bottomup.c
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@ -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

23
tools/testing/selftests/riscv/mm/mmap_default.c
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@ -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

107
tools/testing/selftests/riscv/mm/mmap_test.h
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@ -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)
#define PROT (PROT_READ | PROT_WRITE)
#define 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)
{
/*
* 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);
unsigned long max_bit = (1UL << (((sizeof(unsigned long) * 8) - 1 -
__builtin_clzl(input))));
int prot = PROT_READ | PROT_WRITE;
int flags = MAP_PRIVATE | MAP_ANONYMOUS;
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;
}