summaryrefslogtreecommitdiff
path: root/tools/testing/selftests/arm64/fp
diff options
context:
space:
mode:
Diffstat (limited to 'tools/testing/selftests/arm64/fp')
-rw-r--r--tools/testing/selftests/arm64/fp/.gitignore1
-rw-r--r--tools/testing/selftests/arm64/fp/Makefile4
-rw-r--r--tools/testing/selftests/arm64/fp/fp-pidbench.S71
-rw-r--r--tools/testing/selftests/arm64/fp/sve-ptrace.c219
4 files changed, 217 insertions, 78 deletions
diff --git a/tools/testing/selftests/arm64/fp/.gitignore b/tools/testing/selftests/arm64/fp/.gitignore
index b67395903b9b..c50d86331ed2 100644
--- a/tools/testing/selftests/arm64/fp/.gitignore
+++ b/tools/testing/selftests/arm64/fp/.gitignore
@@ -1,3 +1,4 @@
+fp-pidbench
fpsimd-test
rdvl-sve
sve-probe-vls
diff --git a/tools/testing/selftests/arm64/fp/Makefile b/tools/testing/selftests/arm64/fp/Makefile
index ba1488c7c315..95f0b877a060 100644
--- a/tools/testing/selftests/arm64/fp/Makefile
+++ b/tools/testing/selftests/arm64/fp/Makefile
@@ -2,13 +2,15 @@
CFLAGS += -I../../../../../usr/include/
TEST_GEN_PROGS := sve-ptrace sve-probe-vls vec-syscfg
-TEST_PROGS_EXTENDED := fpsimd-test fpsimd-stress \
+TEST_PROGS_EXTENDED := fp-pidbench fpsimd-test fpsimd-stress \
rdvl-sve \
sve-test sve-stress \
vlset
all: $(TEST_GEN_PROGS) $(TEST_PROGS_EXTENDED)
+fp-pidbench: fp-pidbench.S asm-utils.o
+ $(CC) -nostdlib $^ -o $@
fpsimd-test: fpsimd-test.o asm-utils.o
$(CC) -nostdlib $^ -o $@
rdvl-sve: rdvl-sve.o rdvl.o
diff --git a/tools/testing/selftests/arm64/fp/fp-pidbench.S b/tools/testing/selftests/arm64/fp/fp-pidbench.S
new file mode 100644
index 000000000000..16a436389bfc
--- /dev/null
+++ b/tools/testing/selftests/arm64/fp/fp-pidbench.S
@@ -0,0 +1,71 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright (C) 2021 ARM Limited.
+// Original author: Mark Brown <broonie@kernel.org>
+//
+// Trivial syscall overhead benchmark.
+//
+// This is implemented in asm to ensure that we don't have any issues with
+// system libraries using instructions that disrupt the test.
+
+#include <asm/unistd.h>
+#include "assembler.h"
+
+.arch_extension sve
+
+.macro test_loop per_loop
+ mov x10, x20
+ mov x8, #__NR_getpid
+ mrs x11, CNTVCT_EL0
+1:
+ \per_loop
+ svc #0
+ sub x10, x10, #1
+ cbnz x10, 1b
+
+ mrs x12, CNTVCT_EL0
+ sub x0, x12, x11
+ bl putdec
+ puts "\n"
+.endm
+
+// Main program entry point
+.globl _start
+function _start
+_start:
+ puts "Iterations per test: "
+ mov x20, #10000
+ lsl x20, x20, #8
+ mov x0, x20
+ bl putdec
+ puts "\n"
+
+ // Test having never used SVE
+ puts "No SVE: "
+ test_loop
+
+ // Check for SVE support - should use hwcap but that's hard in asm
+ mrs x0, ID_AA64PFR0_EL1
+ ubfx x0, x0, #32, #4
+ cbnz x0, 1f
+ puts "System does not support SVE\n"
+ b out
+1:
+
+ // Execute a SVE instruction
+ puts "SVE VL: "
+ rdvl x0, #8
+ bl putdec
+ puts "\n"
+
+ puts "SVE used once: "
+ test_loop
+
+ // Use SVE per syscall
+ puts "SVE used per syscall: "
+ test_loop "rdvl x0, #8"
+
+ // And we're done
+out:
+ mov x0, #0
+ mov x8, #__NR_exit
+ svc #0
diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c
index c4417bc48d4f..af798b9d232c 100644
--- a/tools/testing/selftests/arm64/fp/sve-ptrace.c
+++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c
@@ -21,16 +21,37 @@
#include "../../kselftest.h"
-#define VL_TESTS (((SVE_VQ_MAX - SVE_VQ_MIN) + 1) * 3)
-#define FPSIMD_TESTS 5
-
-#define EXPECTED_TESTS (VL_TESTS + FPSIMD_TESTS)
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
/* <linux/elf.h> and <sys/auxv.h> don't like each other, so: */
#ifndef NT_ARM_SVE
#define NT_ARM_SVE 0x405
#endif
+struct vec_type {
+ const char *name;
+ unsigned long hwcap_type;
+ unsigned long hwcap;
+ int regset;
+ int prctl_set;
+};
+
+static const struct vec_type vec_types[] = {
+ {
+ .name = "SVE",
+ .hwcap_type = AT_HWCAP,
+ .hwcap = HWCAP_SVE,
+ .regset = NT_ARM_SVE,
+ .prctl_set = PR_SVE_SET_VL,
+ },
+};
+
+#define VL_TESTS (((SVE_VQ_MAX - SVE_VQ_MIN) + 1) * 3)
+#define FLAG_TESTS 2
+#define FPSIMD_TESTS 3
+
+#define EXPECTED_TESTS ((VL_TESTS + FLAG_TESTS + FPSIMD_TESTS) * ARRAY_SIZE(vec_types))
+
static void fill_buf(char *buf, size_t size)
{
int i;
@@ -59,7 +80,8 @@ static int get_fpsimd(pid_t pid, struct user_fpsimd_state *fpsimd)
return ptrace(PTRACE_GETREGSET, pid, NT_PRFPREG, &iov);
}
-static struct user_sve_header *get_sve(pid_t pid, void **buf, size_t *size)
+static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type,
+ void **buf, size_t *size)
{
struct user_sve_header *sve;
void *p;
@@ -80,7 +102,7 @@ static struct user_sve_header *get_sve(pid_t pid, void **buf, size_t *size)
iov.iov_base = *buf;
iov.iov_len = sz;
- if (ptrace(PTRACE_GETREGSET, pid, NT_ARM_SVE, &iov))
+ if (ptrace(PTRACE_GETREGSET, pid, type->regset, &iov))
goto error;
sve = *buf;
@@ -96,17 +118,18 @@ error:
return NULL;
}
-static int set_sve(pid_t pid, const struct user_sve_header *sve)
+static int set_sve(pid_t pid, const struct vec_type *type,
+ const struct user_sve_header *sve)
{
struct iovec iov;
iov.iov_base = (void *)sve;
iov.iov_len = sve->size;
- return ptrace(PTRACE_SETREGSET, pid, NT_ARM_SVE, &iov);
+ return ptrace(PTRACE_SETREGSET, pid, type->regset, &iov);
}
/* Validate setting and getting the inherit flag */
-static void ptrace_set_get_inherit(pid_t child)
+static void ptrace_set_get_inherit(pid_t child, const struct vec_type *type)
{
struct user_sve_header sve;
struct user_sve_header *new_sve = NULL;
@@ -118,9 +141,10 @@ static void ptrace_set_get_inherit(pid_t child)
sve.size = sizeof(sve);
sve.vl = sve_vl_from_vq(SVE_VQ_MIN);
sve.flags = SVE_PT_VL_INHERIT;
- ret = set_sve(child, &sve);
+ ret = set_sve(child, type, &sve);
if (ret != 0) {
- ksft_test_result_fail("Failed to set SVE_PT_VL_INHERIT\n");
+ ksft_test_result_fail("Failed to set %s SVE_PT_VL_INHERIT\n",
+ type->name);
return;
}
@@ -128,35 +152,39 @@ static void ptrace_set_get_inherit(pid_t child)
* Read back the new register state and verify that we have
* set the flags we expected.
*/
- if (!get_sve(child, (void **)&new_sve, &new_sve_size)) {
- ksft_test_result_fail("Failed to read SVE flags\n");
+ if (!get_sve(child, type, (void **)&new_sve, &new_sve_size)) {
+ ksft_test_result_fail("Failed to read %s SVE flags\n",
+ type->name);
return;
}
ksft_test_result(new_sve->flags & SVE_PT_VL_INHERIT,
- "SVE_PT_VL_INHERIT set\n");
+ "%s SVE_PT_VL_INHERIT set\n", type->name);
/* Now clear */
sve.flags &= ~SVE_PT_VL_INHERIT;
- ret = set_sve(child, &sve);
+ ret = set_sve(child, type, &sve);
if (ret != 0) {
- ksft_test_result_fail("Failed to clear SVE_PT_VL_INHERIT\n");
+ ksft_test_result_fail("Failed to clear %s SVE_PT_VL_INHERIT\n",
+ type->name);
return;
}
- if (!get_sve(child, (void **)&new_sve, &new_sve_size)) {
- ksft_test_result_fail("Failed to read SVE flags\n");
+ if (!get_sve(child, type, (void **)&new_sve, &new_sve_size)) {
+ ksft_test_result_fail("Failed to read %s SVE flags\n",
+ type->name);
return;
}
ksft_test_result(!(new_sve->flags & SVE_PT_VL_INHERIT),
- "SVE_PT_VL_INHERIT cleared\n");
+ "%s SVE_PT_VL_INHERIT cleared\n", type->name);
free(new_sve);
}
/* Validate attempting to set the specfied VL via ptrace */
-static void ptrace_set_get_vl(pid_t child, unsigned int vl, bool *supported)
+static void ptrace_set_get_vl(pid_t child, const struct vec_type *type,
+ unsigned int vl, bool *supported)
{
struct user_sve_header sve;
struct user_sve_header *new_sve = NULL;
@@ -166,10 +194,10 @@ static void ptrace_set_get_vl(pid_t child, unsigned int vl, bool *supported)
*supported = false;
/* Check if the VL is supported in this process */
- prctl_vl = prctl(PR_SVE_SET_VL, vl);
+ prctl_vl = prctl(type->prctl_set, vl);
if (prctl_vl == -1)
- ksft_exit_fail_msg("prctl(PR_SVE_SET_VL) failed: %s (%d)\n",
- strerror(errno), errno);
+ ksft_exit_fail_msg("prctl(PR_%s_SET_VL) failed: %s (%d)\n",
+ type->name, strerror(errno), errno);
/* If the VL is not supported then a supported VL will be returned */
*supported = (prctl_vl == vl);
@@ -178,9 +206,10 @@ static void ptrace_set_get_vl(pid_t child, unsigned int vl, bool *supported)
memset(&sve, 0, sizeof(sve));
sve.size = sizeof(sve);
sve.vl = vl;
- ret = set_sve(child, &sve);
+ ret = set_sve(child, type, &sve);
if (ret != 0) {
- ksft_test_result_fail("Failed to set VL %u\n", vl);
+ ksft_test_result_fail("Failed to set %s VL %u\n",
+ type->name, vl);
return;
}
@@ -188,12 +217,14 @@ static void ptrace_set_get_vl(pid_t child, unsigned int vl, bool *supported)
* Read back the new register state and verify that we have the
* same VL that we got from prctl() on ourselves.
*/
- if (!get_sve(child, (void **)&new_sve, &new_sve_size)) {
- ksft_test_result_fail("Failed to read VL %u\n", vl);
+ if (!get_sve(child, type, (void **)&new_sve, &new_sve_size)) {
+ ksft_test_result_fail("Failed to read %s VL %u\n",
+ type->name, vl);
return;
}
- ksft_test_result(new_sve->vl = prctl_vl, "Set VL %u\n", vl);
+ ksft_test_result(new_sve->vl = prctl_vl, "Set %s VL %u\n",
+ type->name, vl);
free(new_sve);
}
@@ -209,7 +240,7 @@ static void check_u32(unsigned int vl, const char *reg,
}
/* Access the FPSIMD registers via the SVE regset */
-static void ptrace_sve_fpsimd(pid_t child)
+static void ptrace_sve_fpsimd(pid_t child, const struct vec_type *type)
{
void *svebuf = NULL;
size_t svebufsz = 0;
@@ -219,17 +250,18 @@ static void ptrace_sve_fpsimd(pid_t child)
unsigned char *p;
/* New process should start with FPSIMD registers only */
- sve = get_sve(child, &svebuf, &svebufsz);
+ sve = get_sve(child, type, &svebuf, &svebufsz);
if (!sve) {
- ksft_test_result_fail("get_sve: %s\n", strerror(errno));
+ ksft_test_result_fail("get_sve(%s): %s\n",
+ type->name, strerror(errno));
return;
} else {
- ksft_test_result_pass("get_sve(FPSIMD)\n");
+ ksft_test_result_pass("get_sve(%s FPSIMD)\n", type->name);
}
ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD,
- "Set FPSIMD registers\n");
+ "Set FPSIMD registers via %s\n", type->name);
if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD)
goto out;
@@ -243,9 +275,9 @@ static void ptrace_sve_fpsimd(pid_t child)
p[j] = j;
}
- if (set_sve(child, sve)) {
- ksft_test_result_fail("set_sve(FPSIMD): %s\n",
- strerror(errno));
+ if (set_sve(child, type, sve)) {
+ ksft_test_result_fail("set_sve(%s FPSIMD): %s\n",
+ type->name, strerror(errno));
goto out;
}
@@ -257,16 +289,20 @@ static void ptrace_sve_fpsimd(pid_t child)
goto out;
}
if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0)
- ksft_test_result_pass("get_fpsimd() gave same state\n");
+ ksft_test_result_pass("%s get_fpsimd() gave same state\n",
+ type->name);
else
- ksft_test_result_fail("get_fpsimd() gave different state\n");
+ ksft_test_result_fail("%s get_fpsimd() gave different state\n",
+ type->name);
out:
free(svebuf);
}
/* Validate attempting to set SVE data and read SVE data */
-static void ptrace_set_sve_get_sve_data(pid_t child, unsigned int vl)
+static void ptrace_set_sve_get_sve_data(pid_t child,
+ const struct vec_type *type,
+ unsigned int vl)
{
void *write_buf;
void *read_buf = NULL;
@@ -281,8 +317,8 @@ static void ptrace_set_sve_get_sve_data(pid_t child, unsigned int vl)
data_size = SVE_PT_SVE_OFFSET + SVE_PT_SVE_SIZE(vq, SVE_PT_REGS_SVE);
write_buf = malloc(data_size);
if (!write_buf) {
- ksft_test_result_fail("Error allocating %d byte buffer for VL %u\n",
- data_size, vl);
+ ksft_test_result_fail("Error allocating %d byte buffer for %s VL %u\n",
+ data_size, type->name, vl);
return;
}
write_sve = write_buf;
@@ -306,23 +342,26 @@ static void ptrace_set_sve_get_sve_data(pid_t child, unsigned int vl)
/* TODO: Generate a valid FFR pattern */
- ret = set_sve(child, write_sve);
+ ret = set_sve(child, type, write_sve);
if (ret != 0) {
- ksft_test_result_fail("Failed to set VL %u data\n", vl);
+ ksft_test_result_fail("Failed to set %s VL %u data\n",
+ type->name, vl);
goto out;
}
/* Read the data back */
- if (!get_sve(child, (void **)&read_buf, &read_sve_size)) {
- ksft_test_result_fail("Failed to read VL %u data\n", vl);
+ if (!get_sve(child, type, (void **)&read_buf, &read_sve_size)) {
+ ksft_test_result_fail("Failed to read %s VL %u data\n",
+ type->name, vl);
goto out;
}
read_sve = read_buf;
/* We might read more data if there's extensions we don't know */
if (read_sve->size < write_sve->size) {
- ksft_test_result_fail("Wrote %d bytes, only read %d\n",
- write_sve->size, read_sve->size);
+ ksft_test_result_fail("%s wrote %d bytes, only read %d\n",
+ type->name, write_sve->size,
+ read_sve->size);
goto out_read;
}
@@ -349,7 +388,8 @@ static void ptrace_set_sve_get_sve_data(pid_t child, unsigned int vl)
check_u32(vl, "FPCR", write_buf + SVE_PT_SVE_FPCR_OFFSET(vq),
read_buf + SVE_PT_SVE_FPCR_OFFSET(vq), &errors);
- ksft_test_result(errors == 0, "Set and get SVE data for VL %u\n", vl);
+ ksft_test_result(errors == 0, "Set and get %s data for VL %u\n",
+ type->name, vl);
out_read:
free(read_buf);
@@ -358,7 +398,9 @@ out:
}
/* Validate attempting to set SVE data and read SVE data */
-static void ptrace_set_sve_get_fpsimd_data(pid_t child, unsigned int vl)
+static void ptrace_set_sve_get_fpsimd_data(pid_t child,
+ const struct vec_type *type,
+ unsigned int vl)
{
void *write_buf;
struct user_sve_header *write_sve;
@@ -376,8 +418,8 @@ static void ptrace_set_sve_get_fpsimd_data(pid_t child, unsigned int vl)
data_size = SVE_PT_SVE_OFFSET + SVE_PT_SVE_SIZE(vq, SVE_PT_REGS_SVE);
write_buf = malloc(data_size);
if (!write_buf) {
- ksft_test_result_fail("Error allocating %d byte buffer for VL %u\n",
- data_size, vl);
+ ksft_test_result_fail("Error allocating %d byte buffer for %s VL %u\n",
+ data_size, type->name, vl);
return;
}
write_sve = write_buf;
@@ -395,16 +437,17 @@ static void ptrace_set_sve_get_fpsimd_data(pid_t child, unsigned int vl)
fill_buf(write_buf + SVE_PT_SVE_FPSR_OFFSET(vq), SVE_PT_SVE_FPSR_SIZE);
fill_buf(write_buf + SVE_PT_SVE_FPCR_OFFSET(vq), SVE_PT_SVE_FPCR_SIZE);
- ret = set_sve(child, write_sve);
+ ret = set_sve(child, type, write_sve);
if (ret != 0) {
- ksft_test_result_fail("Failed to set VL %u data\n", vl);
+ ksft_test_result_fail("Failed to set %s VL %u data\n",
+ type->name, vl);
goto out;
}
/* Read the data back */
if (get_fpsimd(child, &fpsimd_state)) {
- ksft_test_result_fail("Failed to read VL %u FPSIMD data\n",
- vl);
+ ksft_test_result_fail("Failed to read %s VL %u FPSIMD data\n",
+ type->name, vl);
goto out;
}
@@ -419,7 +462,8 @@ static void ptrace_set_sve_get_fpsimd_data(pid_t child, unsigned int vl)
sizeof(tmp));
if (tmp != fpsimd_state.vregs[i]) {
- printf("# Mismatch in FPSIMD for VL %u Z%d\n", vl, i);
+ printf("# Mismatch in FPSIMD for %s VL %u Z%d\n",
+ type->name, vl, i);
errors++;
}
}
@@ -429,8 +473,8 @@ static void ptrace_set_sve_get_fpsimd_data(pid_t child, unsigned int vl)
check_u32(vl, "FPCR", write_buf + SVE_PT_SVE_FPCR_OFFSET(vq),
&fpsimd_state.fpcr, &errors);
- ksft_test_result(errors == 0, "Set and get FPSIMD data for VL %u\n",
- vl);
+ ksft_test_result(errors == 0, "Set and get FPSIMD data for %s VL %u\n",
+ type->name, vl);
out:
free(write_buf);
@@ -440,7 +484,7 @@ static int do_parent(pid_t child)
{
int ret = EXIT_FAILURE;
pid_t pid;
- int status;
+ int status, i;
siginfo_t si;
unsigned int vq, vl;
bool vl_supported;
@@ -499,26 +543,47 @@ static int do_parent(pid_t child)
}
}
- /* FPSIMD via SVE regset */
- ptrace_sve_fpsimd(child);
-
- /* prctl() flags */
- ptrace_set_get_inherit(child);
-
- /* Step through every possible VQ */
- for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {
- vl = sve_vl_from_vq(vq);
+ for (i = 0; i < ARRAY_SIZE(vec_types); i++) {
+ /* FPSIMD via SVE regset */
+ if (getauxval(vec_types[i].hwcap_type) & vec_types[i].hwcap) {
+ ptrace_sve_fpsimd(child, &vec_types[i]);
+ } else {
+ ksft_test_result_skip("%s FPSIMD get via SVE\n",
+ vec_types[i].name);
+ ksft_test_result_skip("%s FPSIMD set via SVE\n",
+ vec_types[i].name);
+ ksft_test_result_skip("%s set read via FPSIMD\n",
+ vec_types[i].name);
+ }
- /* First, try to set this vector length */
- ptrace_set_get_vl(child, vl, &vl_supported);
+ /* prctl() flags */
+ ptrace_set_get_inherit(child, &vec_types[i]);
+
+ /* Step through every possible VQ */
+ for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) {
+ vl = sve_vl_from_vq(vq);
+
+ /* First, try to set this vector length */
+ if (getauxval(vec_types[i].hwcap_type) &
+ vec_types[i].hwcap) {
+ ptrace_set_get_vl(child, &vec_types[i], vl,
+ &vl_supported);
+ } else {
+ ksft_test_result_skip("%s get/set VL %d\n",
+ vec_types[i].name, vl);
+ vl_supported = false;
+ }
- /* If the VL is supported validate data set/get */
- if (vl_supported) {
- ptrace_set_sve_get_sve_data(child, vl);
- ptrace_set_sve_get_fpsimd_data(child, vl);
- } else {
- ksft_test_result_skip("set SVE get SVE for VL %d\n", vl);
- ksft_test_result_skip("set SVE get FPSIMD for VL %d\n", vl);
+ /* If the VL is supported validate data set/get */
+ if (vl_supported) {
+ ptrace_set_sve_get_sve_data(child, &vec_types[i], vl);
+ ptrace_set_sve_get_fpsimd_data(child, &vec_types[i], vl);
+ } else {
+ ksft_test_result_skip("%s set SVE get SVE for VL %d\n",
+ vec_types[i].name, vl);
+ ksft_test_result_skip("%s set SVE get FPSIMD for VL %d\n",
+ vec_types[i].name, vl);
+ }
}
}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-28 09:04:36 +0300