diff options
author | Milosz Wasilewski <milosz.wasilewski@hackbox.linaro.org> | 2015-11-15 23:02:29 +0000 |
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committer | Milosz Wasilewski <milosz.wasilewski@hackbox.linaro.org> | 2015-11-15 23:02:29 +0000 |
commit | 88998027f6be359706650d48d2bec705e2672962 (patch) | |
tree | dcc6549d5797521553990dd1cd7a390bbbb39a92 /powerpc/dscr/dscr_sysfs_thread_test.c | |
parent | 751dc08e504621a230a1b556abdd2c660953708d (diff) |
Update to commit: 6a13feb9c82803e2b815eca72fa7a9f5561d78616a13feb9c82803e2b815eca72fa7a9f5561d7861
from repo: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
branch: master
Diffstat (limited to 'powerpc/dscr/dscr_sysfs_thread_test.c')
-rw-r--r-- | powerpc/dscr/dscr_sysfs_thread_test.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/powerpc/dscr/dscr_sysfs_thread_test.c b/powerpc/dscr/dscr_sysfs_thread_test.c new file mode 100644 index 0000000..ad97b59 --- /dev/null +++ b/powerpc/dscr/dscr_sysfs_thread_test.c @@ -0,0 +1,80 @@ +/* + * POWER Data Stream Control Register (DSCR) sysfs thread test + * + * This test updates the system wide DSCR default value through + * sysfs interface which should then update all the CPU specific + * DSCR default values which must also be then visible to threads + * executing on individual CPUs on the system. + * + * Copyright 2015, Anshuman Khandual, IBM Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + */ +#define _GNU_SOURCE +#include "dscr.h" + +static int test_thread_dscr(unsigned long val) +{ + unsigned long cur_dscr, cur_dscr_usr; + + cur_dscr = get_dscr(); + cur_dscr_usr = get_dscr_usr(); + + if (val != cur_dscr) { + printf("[cpu %d] Kernel DSCR should be %ld but is %ld\n", + sched_getcpu(), val, cur_dscr); + return 1; + } + + if (val != cur_dscr_usr) { + printf("[cpu %d] User DSCR should be %ld but is %ld\n", + sched_getcpu(), val, cur_dscr_usr); + return 1; + } + return 0; +} + +static int check_cpu_dscr_thread(unsigned long val) +{ + cpu_set_t mask; + int cpu; + + for (cpu = 0; cpu < CPU_SETSIZE; cpu++) { + CPU_ZERO(&mask); + CPU_SET(cpu, &mask); + if (sched_setaffinity(0, sizeof(mask), &mask)) + continue; + + if (test_thread_dscr(val)) + return 1; + } + return 0; + +} + +int dscr_sysfs_thread(void) +{ + unsigned long orig_dscr_default; + int i, j; + + orig_dscr_default = get_default_dscr(); + for (i = 0; i < COUNT; i++) { + for (j = 0; j < DSCR_MAX; j++) { + set_default_dscr(j); + if (check_cpu_dscr_thread(j)) + goto fail; + } + } + set_default_dscr(orig_dscr_default); + return 0; +fail: + set_default_dscr(orig_dscr_default); + return 1; +} + +int main(int argc, char *argv[]) +{ + return test_harness(dscr_sysfs_thread, "dscr_sysfs_thread_test"); +} |