From: Mark Brown <broonie@kernel.org> To: Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Shuah Khan <shuah@kernel.org>, Dave Martin <Dave.Martin@arm.com> Cc: linux-kselftest@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mark Brown <broonie@kernel.org> Subject: [PATCH v2 4/6] selftests: arm64: Add utility to set SVE vector lengths Date: Wed, 19 Aug 2020 12:48:35 +0100 [thread overview] Message-ID: <20200819114837.51466-5-broonie@kernel.org> (raw) In-Reply-To: <20200819114837.51466-1-broonie@kernel.org> vlset is a small utility for use in conjunction with tests like the sve-test stress test which allows another executable to be invoked with a configured SVE vector length. Signed-off-by: Mark Brown <broonie@kernel.org> --- tools/testing/selftests/arm64/fp/vlset.c | 155 +++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 tools/testing/selftests/arm64/fp/vlset.c diff --git a/tools/testing/selftests/arm64/fp/vlset.c b/tools/testing/selftests/arm64/fp/vlset.c new file mode 100644 index 000000000000..308d27a68226 --- /dev/null +++ b/tools/testing/selftests/arm64/fp/vlset.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2015-2019 ARM Limited. + * Original author: Dave Martin <Dave.Martin@arm.com> + */ +#define _GNU_SOURCE +#include <assert.h> +#include <errno.h> +#include <limits.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <unistd.h> +#include <sys/auxv.h> +#include <sys/prctl.h> +#include <asm/hwcap.h> +#include <asm/sigcontext.h> + +static int inherit = 0; +static int no_inherit = 0; +static int force = 0; +static unsigned long vl; + +static const struct option options[] = { + { "force", no_argument, NULL, 'f' }, + { "inherit", no_argument, NULL, 'i' }, + { "max", no_argument, NULL, 'M' }, + { "no-inherit", no_argument, &no_inherit, 1 }, + { "help", no_argument, NULL, '?' }, + {} +}; + +static char const *program_name; + +static int parse_options(int argc, char **argv) +{ + int c; + char *rest; + + program_name = strrchr(argv[0], '/'); + if (program_name) + ++program_name; + else + program_name = argv[0]; + + while ((c = getopt_long(argc, argv, "Mfhi", options, NULL)) != -1) + switch (c) { + case 'M': vl = SVE_VL_MAX; break; + case 'f': force = 1; break; + case 'i': inherit = 1; break; + case 0: break; + default: goto error; + } + + if (inherit && no_inherit) + goto error; + + if (!vl) { + /* vector length */ + if (optind >= argc) + goto error; + + errno = 0; + vl = strtoul(argv[optind], &rest, 0); + if (*rest) { + vl = ULONG_MAX; + errno = EINVAL; + } + if (vl == ULONG_MAX && errno) { + fprintf(stderr, "%s: %s: %s\n", + program_name, argv[optind], strerror(errno)); + goto error; + } + + ++optind; + } + + /* command */ + if (optind >= argc) + goto error; + + return 0; + +error: + fprintf(stderr, + "Usage: %s [-f | --force] " + "[-i | --inherit | --no-inherit] " + "{-M | --max | <vector length>} " + "<command> [<arguments> ...]\n", + program_name); + return -1; +} + +int main(int argc, char **argv) +{ + int ret = 126; /* same as sh(1) command-not-executable error */ + long flags; + char *path; + int t, e; + + if (parse_options(argc, argv)) + return 2; /* same as sh(1) builtin incorrect-usage */ + + if (vl & ~(vl & PR_SVE_VL_LEN_MASK)) { + fprintf(stderr, "%s: Invalid vector length %lu\n", + program_name, vl); + return 2; /* same as sh(1) builtin incorrect-usage */ + } + + if (!(getauxval(AT_HWCAP) & HWCAP_SVE)) { + fprintf(stderr, "%s: Scalable Vector Extension not present\n", + program_name); + + if (!force) + goto error; + + fputs("Going ahead anyway (--force): " + "This is a debug option. Don't rely on it.\n", + stderr); + } + + flags = PR_SVE_SET_VL_ONEXEC; + if (inherit) + flags |= PR_SVE_VL_INHERIT; + + t = prctl(PR_SVE_SET_VL, vl | flags); + if (t < 0) { + fprintf(stderr, "%s: PR_SVE_SET_VL: %s\n", + program_name, strerror(errno)); + goto error; + } + + t = prctl(PR_SVE_GET_VL); + if (t == -1) { + fprintf(stderr, "%s: PR_SVE_GET_VL: %s\n", + program_name, strerror(errno)); + goto error; + } + flags = PR_SVE_VL_LEN_MASK; + flags = t & ~flags; + + assert(optind < argc); + path = argv[optind]; + + execvp(path, &argv[optind]); + e = errno; + if (errno == ENOENT) + ret = 127; /* same as sh(1) not-found error */ + fprintf(stderr, "%s: %s: %s\n", program_name, path, strerror(e)); + +error: + return ret; /* same as sh(1) not-executable error */ +} -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org> To: Will Deacon <will@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Shuah Khan <shuah@kernel.org>, Dave Martin <Dave.Martin@arm.com> Cc: Mark Brown <broonie@kernel.org>, linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org Subject: [PATCH v2 4/6] selftests: arm64: Add utility to set SVE vector lengths Date: Wed, 19 Aug 2020 12:48:35 +0100 [thread overview] Message-ID: <20200819114837.51466-5-broonie@kernel.org> (raw) In-Reply-To: <20200819114837.51466-1-broonie@kernel.org> vlset is a small utility for use in conjunction with tests like the sve-test stress test which allows another executable to be invoked with a configured SVE vector length. Signed-off-by: Mark Brown <broonie@kernel.org> --- tools/testing/selftests/arm64/fp/vlset.c | 155 +++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 tools/testing/selftests/arm64/fp/vlset.c diff --git a/tools/testing/selftests/arm64/fp/vlset.c b/tools/testing/selftests/arm64/fp/vlset.c new file mode 100644 index 000000000000..308d27a68226 --- /dev/null +++ b/tools/testing/selftests/arm64/fp/vlset.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2015-2019 ARM Limited. + * Original author: Dave Martin <Dave.Martin@arm.com> + */ +#define _GNU_SOURCE +#include <assert.h> +#include <errno.h> +#include <limits.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <unistd.h> +#include <sys/auxv.h> +#include <sys/prctl.h> +#include <asm/hwcap.h> +#include <asm/sigcontext.h> + +static int inherit = 0; +static int no_inherit = 0; +static int force = 0; +static unsigned long vl; + +static const struct option options[] = { + { "force", no_argument, NULL, 'f' }, + { "inherit", no_argument, NULL, 'i' }, + { "max", no_argument, NULL, 'M' }, + { "no-inherit", no_argument, &no_inherit, 1 }, + { "help", no_argument, NULL, '?' }, + {} +}; + +static char const *program_name; + +static int parse_options(int argc, char **argv) +{ + int c; + char *rest; + + program_name = strrchr(argv[0], '/'); + if (program_name) + ++program_name; + else + program_name = argv[0]; + + while ((c = getopt_long(argc, argv, "Mfhi", options, NULL)) != -1) + switch (c) { + case 'M': vl = SVE_VL_MAX; break; + case 'f': force = 1; break; + case 'i': inherit = 1; break; + case 0: break; + default: goto error; + } + + if (inherit && no_inherit) + goto error; + + if (!vl) { + /* vector length */ + if (optind >= argc) + goto error; + + errno = 0; + vl = strtoul(argv[optind], &rest, 0); + if (*rest) { + vl = ULONG_MAX; + errno = EINVAL; + } + if (vl == ULONG_MAX && errno) { + fprintf(stderr, "%s: %s: %s\n", + program_name, argv[optind], strerror(errno)); + goto error; + } + + ++optind; + } + + /* command */ + if (optind >= argc) + goto error; + + return 0; + +error: + fprintf(stderr, + "Usage: %s [-f | --force] " + "[-i | --inherit | --no-inherit] " + "{-M | --max | <vector length>} " + "<command> [<arguments> ...]\n", + program_name); + return -1; +} + +int main(int argc, char **argv) +{ + int ret = 126; /* same as sh(1) command-not-executable error */ + long flags; + char *path; + int t, e; + + if (parse_options(argc, argv)) + return 2; /* same as sh(1) builtin incorrect-usage */ + + if (vl & ~(vl & PR_SVE_VL_LEN_MASK)) { + fprintf(stderr, "%s: Invalid vector length %lu\n", + program_name, vl); + return 2; /* same as sh(1) builtin incorrect-usage */ + } + + if (!(getauxval(AT_HWCAP) & HWCAP_SVE)) { + fprintf(stderr, "%s: Scalable Vector Extension not present\n", + program_name); + + if (!force) + goto error; + + fputs("Going ahead anyway (--force): " + "This is a debug option. Don't rely on it.\n", + stderr); + } + + flags = PR_SVE_SET_VL_ONEXEC; + if (inherit) + flags |= PR_SVE_VL_INHERIT; + + t = prctl(PR_SVE_SET_VL, vl | flags); + if (t < 0) { + fprintf(stderr, "%s: PR_SVE_SET_VL: %s\n", + program_name, strerror(errno)); + goto error; + } + + t = prctl(PR_SVE_GET_VL); + if (t == -1) { + fprintf(stderr, "%s: PR_SVE_GET_VL: %s\n", + program_name, strerror(errno)); + goto error; + } + flags = PR_SVE_VL_LEN_MASK; + flags = t & ~flags; + + assert(optind < argc); + path = argv[optind]; + + execvp(path, &argv[optind]); + e = errno; + if (errno == ENOENT) + ret = 127; /* same as sh(1) not-found error */ + fprintf(stderr, "%s: %s: %s\n", program_name, path, strerror(e)); + +error: + return ret; /* same as sh(1) not-executable error */ +} -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-08-19 11:51 UTC|newest] Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-08-19 11:48 [PATCH v2 0/6] selftests: arm64: Add floating point selftests Mark Brown 2020-08-19 11:48 ` Mark Brown 2020-08-19 11:48 ` [PATCH v2 1/6] selftests: arm64: Test case for enumeration of SVE vector lengths Mark Brown 2020-08-19 11:48 ` Mark Brown 2020-08-19 11:48 ` [PATCH v2 2/6] selftests: arm64: Add test for the SVE ptrace interface Mark Brown 2020-08-19 11:48 ` Mark Brown 2020-08-19 11:48 ` [PATCH v2 3/6] selftests: arm64: Add stress tests for FPSMID and SVE context switching Mark Brown 2020-08-19 11:48 ` Mark Brown 2020-08-19 11:48 ` Mark Brown [this message] 2020-08-19 11:48 ` [PATCH v2 4/6] selftests: arm64: Add utility to set SVE vector lengths Mark Brown 2020-08-19 11:48 ` [PATCH v2 5/6] selftests: arm64: Add wrapper scripts for stress tests Mark Brown 2020-08-19 11:48 ` Mark Brown 2020-08-19 11:48 ` [PATCH v2 6/6] selftests: arm64: Add build and documentation for FP tests Mark Brown 2020-08-19 11:48 ` Mark Brown 2020-09-01 15:38 ` Dave Martin 2020-09-01 15:38 ` Dave Martin 2020-09-01 15:47 ` Mark Brown 2020-09-01 15:47 ` Mark Brown 2020-09-01 16:06 ` Dave Martin 2020-09-01 16:06 ` Dave Martin 2020-08-31 21:45 ` [PATCH v2 0/6] selftests: arm64: Add floating point selftests Shuah Khan 2020-08-31 21:45 ` Shuah Khan 2020-09-01 13:21 ` Will Deacon 2020-09-01 13:21 ` Will Deacon 2020-09-01 15:27 ` Dave Martin 2020-09-01 15:27 ` Dave Martin 2020-09-18 16:17 ` Will Deacon 2020-09-18 16:17 ` Will Deacon
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