hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

selftests/powerpc: Remove powerpc special cases from stack expansion test 

Now that the powerpc code behaves the same as other architectures we
can drop the special cases we had.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200724092528.1578671-5-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2020-07-24 19:25:28 +10:00
parent 773b3e53df
commit 73da08f696
1 changed files with 5 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
tools/testing/selftests/powerpc/mm/stack_expansion_ldst.c
View File

@ -56,13 +56,7 @@ int consume_stack(unsigned long target_sp, unsigned long stack_high, int delta,
#else
asm volatile ("mov %%rsp, %[sp]" : [sp] "=r" (stack_top_sp));
#endif
// Kludge, delta < 0 indicates relative to SP
if (delta < 0)
target = stack_top_sp + delta;
else
target = stack_high - delta + 1;
target = stack_high - delta + 1;
volatile char *p = (char *)target;
if (type == STORE)
@ -162,41 +156,16 @@ static int test_one(unsigned int stack_used, int delta, enum access_type type)
static void test_one_type(enum access_type type, unsigned long page_size, unsigned long rlim_cur)
{
assert(test_one(DEFAULT_SIZE, 512 * _KB, type) == 0);
unsigned long delta;
// powerpc has a special case to allow up to 1MB
assert(test_one(DEFAULT_SIZE, 1 * _MB, type) == 0);
#ifdef __powerpc__
// This fails on powerpc because it's > 1MB and is not a stdu &
// not close to r1
assert(test_one(DEFAULT_SIZE, 1 * _MB + 8, type) != 0);
#else
assert(test_one(DEFAULT_SIZE, 1 * _MB + 8, type) == 0);
#endif
#ifdef __powerpc__
// Accessing way past the stack pointer is not allowed on powerpc
assert(test_one(DEFAULT_SIZE, rlim_cur, type) != 0);
#else
// We should be able to access anywhere within the rlimit
for (delta = page_size; delta <= rlim_cur; delta += page_size)
assert(test_one(DEFAULT_SIZE, delta, type) == 0);
assert(test_one(DEFAULT_SIZE, rlim_cur, type) == 0);
#endif
// But if we go past the rlimit it should fail
assert(test_one(DEFAULT_SIZE, rlim_cur + 1, type) != 0);
// Above 1MB powerpc only allows accesses within 4224 bytes of
// r1 for accesses that aren't stdu
assert(test_one(1 * _MB + page_size - 128, -4224, type) == 0);
#ifdef __powerpc__
assert(test_one(1 * _MB + page_size - 128, -4225, type) != 0);
#else
assert(test_one(1 * _MB + page_size - 128, -4225, type) == 0);
#endif
// By consuming 2MB of stack we test the stdu case
assert(test_one(2 * _MB + page_size - 128, -4224, type) == 0);
}
static int test(void)