Commit 58dae828 authored by Greg Kurz's avatar Greg Kurz Committed by Michael Ellerman
Browse files

selftests/powerpc: Add test for VPHN 



The goal is to verify vphn_unpack_associativity() parses VPHN numbers
correctly. We feed it with a variety of input values and compare with
expected results.

PAPR+ does not say much about VPHN parsing: I came up with a list of
tests that check many simple cases and some corner ones. I wouldn't
dare to say the list is exhaustive though.

Signed-off-by: default avatarGreg Kurz <gkurz@linux.vnet.ibm.com>
[mpe: Rework harness logic, rename to test-vphn, add -m64]
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Reviewed-by: default avatarGreg Kurz <gkurz@linux.vnet.ibm.com>
parent 3338a65b

tools/testing/selftests/powerpc/Makefile

+1 −1
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@@ -13,7 +13,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR 


export CC CFLAGS



TARGETS = pmu copyloops mm tm primitives stringloops

TARGETS = pmu copyloops mm tm primitives stringloops vphn



endif

tools/testing/selftests/powerpc/utils.h

+1 −0
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@@ -15,6 +15,7 @@ typedef signed long long s64; 


/* Just for familiarity */

typedef uint32_t u32;

typedef uint16_t u16;

typedef uint8_t u8;

tools/testing/selftests/powerpc/vphn/.gitignore

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test-vphn

tools/testing/selftests/powerpc/vphn/Makefile

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PROG := test-vphn



CFLAGS += -m64



all: $(PROG)



$(PROG): ../harness.c



run_tests: all

	./$(PROG)



clean:

	rm -f $(PROG)



.PHONY: all run_tests clean

tools/testing/selftests/powerpc/vphn/test-vphn.c

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Original line number Diff line number Diff line 
#include <stdio.h>

#include <byteswap.h>

#include "utils.h"

#include "subunit.h"



#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__

#define cpu_to_be32(x)		bswap_32(x)

#define be32_to_cpu(x)		bswap_32(x)

#define be16_to_cpup(x)		bswap_16(*x)

#define cpu_to_be64(x)		bswap_64(x)

#else

#define cpu_to_be32(x)		(x)

#define be32_to_cpu(x)		(x)

#define be16_to_cpup(x)		(*x)

#define cpu_to_be64(x)		(x)

#endif



#include "vphn.c"



static struct test {

	char *descr;

	long input[VPHN_REGISTER_COUNT];

	u32 expected[VPHN_ASSOC_BUFSIZE];

} all_tests[] = {

	{

		"vphn: no data",

		{

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

		},

		{

			0x00000000

		}

	},

	{

		"vphn: 1 x 16-bit value",

		{

			0x8001ffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

		},

		{

			0x00000001,

			0x00000001

		}

	},

	{

		"vphn: 2 x 16-bit values",

		{

			0x80018002ffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

		},

		{

			0x00000002,

			0x00000001,

			0x00000002

		}

	},

	{

		"vphn: 3 x 16-bit values",

		{

			0x800180028003ffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

		},

		{

			0x00000003,

			0x00000001,

			0x00000002,

			0x00000003

		}

	},

	{

		"vphn: 4 x 16-bit values",

		{

			0x8001800280038004,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

		},

		{

			0x00000004,

			0x00000001,

			0x00000002,

			0x00000003,

			0x00000004

		}

	},

	{

		/* Parsing the next 16-bit value out of the next 64-bit input

		 * value.

		 */

		"vphn: 5 x 16-bit values",

		{

			0x8001800280038004,

			0x8005ffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

		},

		{

			0x00000005,

			0x00000001,

			0x00000002,

			0x00000003,

			0x00000004,

			0x00000005

		}

	},

	{

		/* Parse at most 6 x 64-bit input values */

		"vphn: 24 x 16-bit values",

		{

			0x8001800280038004,

			0x8005800680078008,

			0x8009800a800b800c,

			0x800d800e800f8010,

			0x8011801280138014,

			0x8015801680178018

		},

		{

			0x00000018,

			0x00000001,

			0x00000002,

			0x00000003,

			0x00000004,

			0x00000005,

			0x00000006,

			0x00000007,

			0x00000008,

			0x00000009,

			0x0000000a,

			0x0000000b,

			0x0000000c,

			0x0000000d,

			0x0000000e,

			0x0000000f,

			0x00000010,

			0x00000011,

			0x00000012,

			0x00000013,

			0x00000014,

			0x00000015,

			0x00000016,

			0x00000017,

			0x00000018

		}

	},

	{

		"vphn: 1 x 32-bit value",

		{

			0x00000001ffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000001,

			0x00000001

		}

	},

	{

		"vphn: 2 x 32-bit values",

		{

			0x0000000100000002,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000002,

			0x00000001,

			0x00000002

		}

	},

	{

		/* Parsing the next 32-bit value out of the next 64-bit input

		 * value.

		 */

		"vphn: 3 x 32-bit values",

		{

			0x0000000100000002,

			0x00000003ffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000003,

			0x00000001,

			0x00000002,

			0x00000003

		}

	},

	{

		/* Parse at most 6 x 64-bit input values */

		"vphn: 12 x 32-bit values",

		{

			0x0000000100000002,

			0x0000000300000004,

			0x0000000500000006,

			0x0000000700000008,

			0x000000090000000a,

			0x0000000b0000000c

		},

		{

			0x0000000c,

			0x00000001,

			0x00000002,

			0x00000003,

			0x00000004,

			0x00000005,

			0x00000006,

			0x00000007,

			0x00000008,

			0x00000009,

			0x0000000a,

			0x0000000b,

			0x0000000c

		}

	},

	{

		"vphn: 16-bit value followed by 32-bit value",

		{

			0x800100000002ffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000002,

			0x00000001,

			0x00000002

		}

	},

	{

		"vphn: 32-bit value followed by 16-bit value",

		{

			0x000000018002ffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000002,

			0x00000001,

			0x00000002

		}

	},

	{

		/* Parse a 32-bit value split accross two consecutives 64-bit

		 * input values.

		 */

		"vphn: 16-bit value followed by 2 x 32-bit values",

		{

			0x8001000000020000,

			0x0003ffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000003,

			0x00000001,

			0x00000002,

			0x00000003,

			0x00000004,

			0x00000005

		}

	},

	{

		/* The lower bits in 0x0001ffff don't get mixed up with the

		 * 0xffff terminator.

		 */

		"vphn: 32-bit value has all ones in 16 lower bits",

		{

			0x0001ffff80028003,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff,

			0xffffffffffffffff

		},

		{

			0x00000003,

			0x0001ffff,

			0x00000002,

			0x00000003

		}

	},

	{

		/* The following input doesn't follow the specification.

		 */

		"vphn: last 32-bit value is truncated",

		{

			0x0000000100000002,

			0x0000000300000004,

			0x0000000500000006,

			0x0000000700000008,

			0x000000090000000a,

			0x0000000b800c2bad

		},

		{

			0x0000000c,

			0x00000001,

			0x00000002,

			0x00000003,

			0x00000004,

			0x00000005,

			0x00000006,

			0x00000007,

			0x00000008,

			0x00000009,

			0x0000000a,

			0x0000000b,

			0x0000000c

		}

	},

	{

		"vphn: garbage after terminator",

		{

			0xffff2bad2bad2bad,

			0x2bad2bad2bad2bad,

			0x2bad2bad2bad2bad,

			0x2bad2bad2bad2bad,

			0x2bad2bad2bad2bad,

			0x2bad2bad2bad2bad

		},

		{

			0x00000000

		}

	},

	{

		NULL

	}

};



static int test_one(struct test *test)

{

	__be32 output[VPHN_ASSOC_BUFSIZE] = { 0 };

	int i, len;



	vphn_unpack_associativity(test->input, output);



	len = be32_to_cpu(output[0]);

	if (len != test->expected[0]) {

		printf("expected %d elements, got %d\n", test->expected[0],

		       len);

		return 1;

	}



	for (i = 1; i < len; i++) {

		u32 val = be32_to_cpu(output[i]);

		if (val != test->expected[i]) {

			printf("element #%d is 0x%x, should be 0x%x\n", i, val,

			       test->expected[i]);

			return 1;

		}

	}



	return 0;

}



static int test_vphn(void)

{

	static struct test *test;



	for (test = all_tests; test->descr; test++) {

		int ret;



		ret = test_one(test);

		test_finish(test->descr, ret);

		if (ret)

			return ret;

	}



	return 0;

}



int main(int argc, char **argv)

{

	return test_harness(test_vphn, "test-vphn");

}

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