mirror of https://gitee.com/openkylin/linux.git
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: Greg Kurz <gkurz@linux.vnet.ibm.com> [mpe: Rework harness logic, rename to test-vphn, add -m64] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
This commit is contained in:
Greg Kurz
Michael Ellerman
parent
3338a65bad
commit
58dae82843
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@ -13,7 +13,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR
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export CC CFLAGS
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TARGETS = pmu copyloops mm tm primitives stringloops
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TARGETS = pmu copyloops mm tm primitives stringloops vphn
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endif
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@ -15,6 +15,7 @@ typedef signed long long s64;
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/* Just for familiarity */
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typedef uint32_t u32;
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typedef uint16_t u16;
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typedef uint8_t u8;
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@ -0,0 +1 @@
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test-vphn
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@ -0,0 +1,15 @@
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PROG := test-vphn
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CFLAGS += -m64
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all: $(PROG)
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$(PROG): ../harness.c
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run_tests: all
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./$(PROG)
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clean:
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rm -f $(PROG)
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.PHONY: all run_tests clean
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@ -0,0 +1,410 @@
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#include <stdio.h>
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#include <byteswap.h>
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#include "utils.h"
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#include "subunit.h"
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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#define cpu_to_be32(x) bswap_32(x)
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#define be32_to_cpu(x) bswap_32(x)
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#define be16_to_cpup(x) bswap_16(*x)
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#define cpu_to_be64(x) bswap_64(x)
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#else
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#define cpu_to_be32(x) (x)
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#define be32_to_cpu(x) (x)
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#define be16_to_cpup(x) (*x)
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#define cpu_to_be64(x) (x)
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#endif
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#include "vphn.c"
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static struct test {
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char *descr;
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long input[VPHN_REGISTER_COUNT];
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u32 expected[VPHN_ASSOC_BUFSIZE];
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} all_tests[] = {
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{
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"vphn: no data",
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{
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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},
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{
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0x00000000
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}
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},
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{
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"vphn: 1 x 16-bit value",
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{
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0x8001ffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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},
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{
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0x00000001,
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0x00000001
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}
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},
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{
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"vphn: 2 x 16-bit values",
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{
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0x80018002ffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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},
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{
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0x00000002,
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0x00000001,
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0x00000002
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}
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},
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{
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"vphn: 3 x 16-bit values",
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{
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0x800180028003ffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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},
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{
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0x00000003,
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0x00000001,
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0x00000002,
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0x00000003
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}
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},
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{
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"vphn: 4 x 16-bit values",
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{
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0x8001800280038004,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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},
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{
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0x00000004,
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0x00000001,
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0x00000002,
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0x00000003,
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0x00000004
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}
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},
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{
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/* Parsing the next 16-bit value out of the next 64-bit input
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* value.
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*/
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"vphn: 5 x 16-bit values",
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{
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0x8001800280038004,
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0x8005ffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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},
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{
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0x00000005,
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0x00000001,
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0x00000002,
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0x00000003,
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0x00000004,
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0x00000005
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}
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},
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{
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/* Parse at most 6 x 64-bit input values */
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"vphn: 24 x 16-bit values",
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{
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0x8001800280038004,
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0x8005800680078008,
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0x8009800a800b800c,
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0x800d800e800f8010,
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0x8011801280138014,
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0x8015801680178018
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},
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{
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0x00000018,
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0x00000001,
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0x00000002,
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0x00000003,
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0x00000004,
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0x00000005,
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0x00000006,
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0x00000007,
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0x00000008,
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0x00000009,
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0x0000000a,
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0x0000000b,
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0x0000000c,
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0x0000000d,
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0x0000000e,
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0x0000000f,
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0x00000010,
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0x00000011,
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0x00000012,
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0x00000013,
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0x00000014,
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0x00000015,
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0x00000016,
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0x00000017,
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0x00000018
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}
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},
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{
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"vphn: 1 x 32-bit value",
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{
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0x00000001ffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000001,
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0x00000001
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}
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},
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{
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"vphn: 2 x 32-bit values",
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{
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0x0000000100000002,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000002,
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0x00000001,
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0x00000002
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}
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},
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{
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/* Parsing the next 32-bit value out of the next 64-bit input
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* value.
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*/
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"vphn: 3 x 32-bit values",
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{
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0x0000000100000002,
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0x00000003ffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000003,
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0x00000001,
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0x00000002,
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0x00000003
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}
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},
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{
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/* Parse at most 6 x 64-bit input values */
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"vphn: 12 x 32-bit values",
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{
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0x0000000100000002,
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0x0000000300000004,
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0x0000000500000006,
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0x0000000700000008,
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0x000000090000000a,
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0x0000000b0000000c
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},
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{
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0x0000000c,
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0x00000001,
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0x00000002,
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0x00000003,
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0x00000004,
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0x00000005,
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0x00000006,
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0x00000007,
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0x00000008,
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0x00000009,
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0x0000000a,
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0x0000000b,
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0x0000000c
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}
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},
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{
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"vphn: 16-bit value followed by 32-bit value",
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{
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0x800100000002ffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000002,
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0x00000001,
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0x00000002
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}
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},
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{
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"vphn: 32-bit value followed by 16-bit value",
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{
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0x000000018002ffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000002,
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0x00000001,
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0x00000002
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}
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},
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{
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/* Parse a 32-bit value split accross two consecutives 64-bit
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* input values.
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*/
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"vphn: 16-bit value followed by 2 x 32-bit values",
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{
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0x8001000000020000,
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0x0003ffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000003,
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0x00000001,
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0x00000002,
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0x00000003,
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0x00000004,
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0x00000005
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}
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},
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{
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/* The lower bits in 0x0001ffff don't get mixed up with the
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* 0xffff terminator.
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*/
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"vphn: 32-bit value has all ones in 16 lower bits",
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{
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0x0001ffff80028003,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff,
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0xffffffffffffffff
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},
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{
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0x00000003,
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0x0001ffff,
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0x00000002,
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0x00000003
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}
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},
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{
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/* The following input doesn't follow the specification.
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*/
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"vphn: last 32-bit value is truncated",
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{
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0x0000000100000002,
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0x0000000300000004,
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0x0000000500000006,
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0x0000000700000008,
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0x000000090000000a,
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0x0000000b800c2bad
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},
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{
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0x0000000c,
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0x00000001,
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0x00000002,
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0x00000003,
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0x00000004,
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0x00000005,
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0x00000006,
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0x00000007,
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0x00000008,
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0x00000009,
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0x0000000a,
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0x0000000b,
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0x0000000c
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}
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},
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{
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"vphn: garbage after terminator",
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{
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0xffff2bad2bad2bad,
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0x2bad2bad2bad2bad,
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0x2bad2bad2bad2bad,
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0x2bad2bad2bad2bad,
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0x2bad2bad2bad2bad,
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0x2bad2bad2bad2bad
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},
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{
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0x00000000
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}
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},
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{
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NULL
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}
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};
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static int test_one(struct test *test)
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{
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__be32 output[VPHN_ASSOC_BUFSIZE] = { 0 };
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int i, len;
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vphn_unpack_associativity(test->input, output);
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len = be32_to_cpu(output[0]);
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if (len != test->expected[0]) {
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printf("expected %d elements, got %d\n", test->expected[0],
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len);
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return 1;
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}
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for (i = 1; i < len; i++) {
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u32 val = be32_to_cpu(output[i]);
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if (val != test->expected[i]) {
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printf("element #%d is 0x%x, should be 0x%x\n", i, val,
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test->expected[i]);
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return 1;
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}
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}
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return 0;
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}
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static int test_vphn(void)
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{
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static struct test *test;
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for (test = all_tests; test->descr; test++) {
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int ret;
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ret = test_one(test);
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test_finish(test->descr, ret);
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if (ret)
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return ret;
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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return test_harness(test_vphn, "test-vphn");
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}
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@ -0,0 +1 @@
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../../../../../arch/powerpc/mm/vphn.c
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@ -0,0 +1 @@
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../../../../../arch/powerpc/mm/vphn.h
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