diff options
| -rw-r--r-- | tools/testing/selftests/arm64/fp/sve-ptrace.c | 120 |
1 files changed, 59 insertions, 61 deletions
diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c index 199710ba65c7..ac0629f05365 100644 --- a/tools/testing/selftests/arm64/fp/sve-ptrace.c +++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c @@ -158,6 +158,63 @@ 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) +{ + void *svebuf = NULL; + size_t svebufsz = 0; + struct user_sve_header *sve; + struct user_fpsimd_state *fpsimd, new_fpsimd; + unsigned int i, j; + unsigned char *p; + + /* New process should start with FPSIMD registers only */ + sve = get_sve(child, &svebuf, &svebufsz); + if (!sve) { + ksft_test_result_fail("get_sve: %s\n", strerror(errno)); + + return; + } else { + ksft_test_result_pass("get_sve(FPSIMD)\n"); + } + + ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD, + "Set FPSIMD registers\n"); + if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD) + goto out; + + /* Try to set a known FPSIMD state via PT_REGS_SVE */ + fpsimd = (struct user_fpsimd_state *)((char *)sve + + SVE_PT_FPSIMD_OFFSET); + for (i = 0; i < 32; ++i) { + p = (unsigned char *)&fpsimd->vregs[i]; + + for (j = 0; j < sizeof(fpsimd->vregs[i]); ++j) + p[j] = j; + } + + if (set_sve(child, sve)) { + ksft_test_result_fail("set_sve(FPSIMD): %s\n", + strerror(errno)); + + goto out; + } + + /* Verify via the FPSIMD regset */ + if (get_fpsimd(child, &new_fpsimd)) { + ksft_test_result_fail("get_fpsimd(): %s\n", + strerror(errno)); + goto out; + } + if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0) + ksft_test_result_pass("get_fpsimd() gave same state\n"); + else + ksft_test_result_fail("get_fpsimd() gave different state\n"); + +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) { @@ -335,12 +392,6 @@ static int do_parent(pid_t child) pid_t pid; int status; siginfo_t si; - void *svebuf = NULL; - size_t svebufsz = 0; - struct user_sve_header *sve; - struct user_fpsimd_state *fpsimd, new_fpsimd; - unsigned int i, j; - unsigned char *p; unsigned int vq, vl; bool vl_supported; @@ -398,61 +449,8 @@ static int do_parent(pid_t child) } } - /* New process should start with FPSIMD registers only */ - sve = get_sve(pid, &svebuf, &svebufsz); - if (!sve) { - int e = errno; - - ksft_test_result_fail("get_sve: %s\n", strerror(errno)); - if (e == ESRCH) - goto disappeared; - - goto error; - } else { - ksft_test_result_pass("get_sve(FPSIMD)\n"); - } - - ksft_test_result((sve->flags & SVE_PT_REGS_MASK) == SVE_PT_REGS_FPSIMD, - "Set FPSIMD registers\n"); - if ((sve->flags & SVE_PT_REGS_MASK) != SVE_PT_REGS_FPSIMD) - goto error; - - /* Try to set a known FPSIMD state via PT_REGS_SVE */ - fpsimd = (struct user_fpsimd_state *)((char *)sve + - SVE_PT_FPSIMD_OFFSET); - for (i = 0; i < 32; ++i) { - p = (unsigned char *)&fpsimd->vregs[i]; - - for (j = 0; j < sizeof fpsimd->vregs[i]; ++j) - p[j] = j; - } - - if (set_sve(pid, sve)) { - int e = errno; - - ksft_test_result_fail("set_sve(FPSIMD): %s\n", - strerror(errno)); - if (e == ESRCH) - goto disappeared; - - goto error; - } - - /* Verify via the FPSIMD regset */ - if (get_fpsimd(pid, &new_fpsimd)) { - int e = errno; - - ksft_test_result_fail("get_fpsimd(): %s\n", - strerror(errno)); - if (e == ESRCH) - goto disappeared; - - goto error; - } - if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0) - ksft_test_result_pass("get_fpsimd() gave same state\n"); - else - ksft_test_result_fail("get_fpsimd() gave different state\n"); + /* FPSIMD via SVE regset */ + ptrace_sve_fpsimd(child); /* Step through every possible VQ */ for (vq = SVE_VQ_MIN; vq <= SVE_VQ_MAX; vq++) { |