Commit 9ee571d8 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

selftests/powerpc: Update the stack expansion test 



Update the stack expansion load/store test to take into account the
new allowance of 4224 bytes below the stack pointer.

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200724092528.1578671-3-mpe@ellerman.id.au
parent 63dee5df

tools/testing/selftests/powerpc/mm/stack_expansion_ldst.c

+5 −5
Original line number Diff line number Diff line
@@ -186,17 +186,17 @@ static void test_one_type(enum access_type type, unsigned long page_size, unsign 
	// 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 2048 bytes of

	// 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, -2048, type) == 0);

	assert(test_one(1 * _MB + page_size - 128, -4224, type) == 0);

#ifdef __powerpc__

	assert(test_one(1 * _MB + page_size - 128, -2049, type) != 0);

	assert(test_one(1 * _MB + page_size - 128, -4225, type) != 0);

#else

	assert(test_one(1 * _MB + page_size - 128, -2049, type) == 0);

	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, -2048, type) == 0);

	assert(test_one(2 * _MB + page_size - 128, -4224, type) == 0);

}



static int test(void)

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