Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755478AbbDJIcn (ORCPT ); Fri, 10 Apr 2015 04:32:43 -0400 Received: from e23smtp02.au.ibm.com ([202.81.31.144]:36378 "EHLO e23smtp02.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754990AbbDJIbb (ORCPT ); Fri, 10 Apr 2015 04:31:31 -0400 From: Anshuman Khandual To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Cc: mikey@neuling.org, shuahkh@osg.samsung.com, mpe@ellerman.id.au Subject: [PATCH V3 11/13] selftests, powerpc: Add test for all DSCR sysfs interfaces Date: Fri, 10 Apr 2015 14:00:10 +0530 Message-Id: <1428654612-23539-12-git-send-email-khandual@linux.vnet.ibm.com> X-Mailer: git-send-email 1.9.3 In-Reply-To: <1428654612-23539-1-git-send-email-khandual@linux.vnet.ibm.com> References: <1428654612-23539-1-git-send-email-khandual@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15041008-0005-0000-0000-000001990140 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3608 Lines: 131 This test continuously updates the system wide DSCR default value in the sysfs interface and makes sure that the same is reflected across all the sysfs interfaces for each individual CPUs present on the system. Acked-by: Shuah Khan Signed-off-by: Anshuman Khandual --- tools/testing/selftests/powerpc/dscr/Makefile | 3 +- .../selftests/powerpc/dscr/dscr_sysfs_test.c | 92 ++++++++++++++++++++++ 2 files changed, 94 insertions(+), 1 deletion(-) create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c diff --git a/tools/testing/selftests/powerpc/dscr/Makefile b/tools/testing/selftests/powerpc/dscr/Makefile index 4e84309..fada526 100644 --- a/tools/testing/selftests/powerpc/dscr/Makefile +++ b/tools/testing/selftests/powerpc/dscr/Makefile @@ -1,5 +1,6 @@ PROGS := dscr_default_test dscr_explicit_test dscr_user_test \ - dscr_inherit_test dscr_inherit_exec_test + dscr_inherit_test dscr_inherit_exec_test \ + dscr_sysfs_test CFLAGS := $(CFLAGS) -lpthread diff --git a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c new file mode 100644 index 0000000..d5ab4b2 --- /dev/null +++ b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c @@ -0,0 +1,92 @@ +/* + * POWER Data Stream Control Register (DSCR) sysfs interface test + * + * This test updates to system wide DSCR default through the sysfs interface + * and then verifies that all the CPU specific DSCR defaults are updated as + * well verified from their sysfs interfaces. + * + * Copyright (C) 2015 Anshuman Khandual , IBM + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ +#include "dscr.h" + +static int check_cpu_dscr_default(char *file, unsigned long val) +{ + char buf[10]; + int fd, rc; + + fd = open(file, O_RDWR); + if (fd == -1) { + perror("open() failed\n"); + return 1; + } + + rc = read(fd, buf, sizeof(buf)); + if (rc == -1) { + perror("read() failed\n"); + return 1; + } + close(fd); + + buf[rc] = '\0'; + if (strtol(buf, NULL, 16) != val) { + printf("DSCR match failed: %ld (system) %ld (cpu)\n", + val, strtol(buf, NULL, 16)); + return 1; + } + return 0; +} + +static int check_all_cpu_dscr_defaults(unsigned long val) +{ + DIR *sysfs; + struct dirent *dp; + char file[LEN_MAX]; + + sysfs = opendir(CPU_PATH); + if (!sysfs) { + perror("opendir() failed\n"); + return 1; + } + + while ((dp = readdir(sysfs))) { + if (!(dp->d_type & DT_DIR)) + continue; + if (!strcmp(dp->d_name, "cpuidle")) + continue; + if (!strstr(dp->d_name, "cpu")) + continue; + + sprintf(file, "%s%s/dscr", CPU_PATH, dp->d_name); + if (access(file, F_OK)) + continue; + + if (check_cpu_dscr_default(file, val)) + return 1; + } + closedir(sysfs); + return 0; +} + +int test_body(void) +{ + int i, j; + + for (i = 0; i < COUNT; i++) { + for (j = 0; j < DSCR_MAX; j++) { + set_default_dscr(j); + if (check_all_cpu_dscr_defaults(j)) + return 1; + } + } + return 0; +} + +int main(int argc, char *argv[]) +{ + return test_harness(test_body, "dscr_sysfs_test"); +} -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/