From 92dd8dd4d07f170db0638a20a8db691262da4e5e Mon Sep 17 00:00:00 2001 From: Shuah Khan Date: Tue, 13 Sep 2016 11:13:46 -0600 Subject: selftests: move prctl tests from Documentation/prctl Move prctl tests from Documentation/prctl to selftests/prctl. Remove prctl from Makefile to move the test. Update prctl Makefile to work under selftests. prctl will not be run as part of selftests suite and will not be included in install targets. They can be built separately for now. Acked-by: Jonathan Corbet Signed-off-by: Shuah Khan --- Documentation/Makefile | 2 +- Documentation/prctl/.gitignore | 3 - Documentation/prctl/Makefile | 10 --- .../prctl/disable-tsc-ctxt-sw-stress-test.c | 97 ---------------------- .../prctl/disable-tsc-on-off-stress-test.c | 96 --------------------- Documentation/prctl/disable-tsc-test.c | 95 --------------------- tools/testing/selftests/prctl/.gitignore | 3 + tools/testing/selftests/prctl/Makefile | 15 ++++ .../prctl/disable-tsc-ctxt-sw-stress-test.c | 97 ++++++++++++++++++++++ .../prctl/disable-tsc-on-off-stress-test.c | 96 +++++++++++++++++++++ tools/testing/selftests/prctl/disable-tsc-test.c | 95 +++++++++++++++++++++ 11 files changed, 307 insertions(+), 302 deletions(-) delete mode 100644 Documentation/prctl/.gitignore delete mode 100644 Documentation/prctl/Makefile delete mode 100644 Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c delete mode 100644 Documentation/prctl/disable-tsc-on-off-stress-test.c delete mode 100644 Documentation/prctl/disable-tsc-test.c create mode 100644 tools/testing/selftests/prctl/.gitignore create mode 100644 tools/testing/selftests/prctl/Makefile create mode 100644 tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c create mode 100644 tools/testing/selftests/prctl/disable-tsc-on-off-stress-test.c create mode 100644 tools/testing/selftests/prctl/disable-tsc-test.c diff --git a/Documentation/Makefile b/Documentation/Makefile index 0473710c09d0..7a28f6c26755 100644 --- a/Documentation/Makefile +++ b/Documentation/Makefile @@ -1,3 +1,3 @@ subdir-y := accounting auxdisplay blackfin \ ia64 laptops mic misc-devices \ - networking pcmcia prctl ptp timers vDSO watchdog + networking pcmcia ptp timers vDSO watchdog diff --git a/Documentation/prctl/.gitignore b/Documentation/prctl/.gitignore deleted file mode 100644 index 0b5c27447bf6..000000000000 --- a/Documentation/prctl/.gitignore +++ /dev/null @@ -1,3 +0,0 @@ -disable-tsc-ctxt-sw-stress-test -disable-tsc-on-off-stress-test -disable-tsc-test diff --git a/Documentation/prctl/Makefile b/Documentation/prctl/Makefile deleted file mode 100644 index 44de3080c7f2..000000000000 --- a/Documentation/prctl/Makefile +++ /dev/null @@ -1,10 +0,0 @@ -ifndef CROSS_COMPILE -# List of programs to build -hostprogs-$(CONFIG_X86) := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test disable-tsc-test -# Tell kbuild to always build the programs -always := $(hostprogs-y) - -HOSTCFLAGS_disable-tsc-ctxt-sw-stress-test.o += -I$(objtree)/usr/include -HOSTCFLAGS_disable-tsc-on-off-stress-test.o += -I$(objtree)/usr/include -HOSTCFLAGS_disable-tsc-test.o += -I$(objtree)/usr/include -endif diff --git a/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c b/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c deleted file mode 100644 index f7499d1c0415..000000000000 --- a/Documentation/prctl/disable-tsc-ctxt-sw-stress-test.c +++ /dev/null @@ -1,97 +0,0 @@ -/* - * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...) - * - * Tests if the control register is updated correctly - * at context switches - * - * Warning: this test will cause a very high load for a few seconds - * - */ - -#include -#include -#include -#include -#include -#include - - -#include -#include - -/* Get/set the process' ability to use the timestamp counter instruction */ -#ifndef PR_GET_TSC -#define PR_GET_TSC 25 -#define PR_SET_TSC 26 -# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ -# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ -#endif - -static uint64_t rdtsc(void) -{ -uint32_t lo, hi; -/* We cannot use "=A", since this would use %rax on x86_64 */ -__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); -return (uint64_t)hi << 32 | lo; -} - -static void sigsegv_expect(int sig) -{ - /* */ -} - -static void segvtask(void) -{ - if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0) - { - perror("prctl"); - exit(0); - } - signal(SIGSEGV, sigsegv_expect); - alarm(10); - rdtsc(); - fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n"); - exit(0); -} - - -static void sigsegv_fail(int sig) -{ - fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n"); - exit(0); -} - -static void rdtsctask(void) -{ - if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0) - { - perror("prctl"); - exit(0); - } - signal(SIGSEGV, sigsegv_fail); - alarm(10); - for(;;) rdtsc(); -} - - -int main(void) -{ - int n_tasks = 100, i; - - fprintf(stderr, "[No further output means we're allright]\n"); - - for (i=0; i -#include -#include -#include -#include -#include - - -#include -#include - -/* Get/set the process' ability to use the timestamp counter instruction */ -#ifndef PR_GET_TSC -#define PR_GET_TSC 25 -#define PR_SET_TSC 26 -# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ -# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ -#endif - -/* snippet from wikipedia :-) */ - -static uint64_t rdtsc(void) -{ -uint32_t lo, hi; -/* We cannot use "=A", since this would use %rax on x86_64 */ -__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); -return (uint64_t)hi << 32 | lo; -} - -int should_segv = 0; - -static void sigsegv_cb(int sig) -{ - if (!should_segv) - { - fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n"); - exit(0); - } - if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0) - { - perror("prctl"); - exit(0); - } - should_segv = 0; - - rdtsc(); -} - -static void task(void) -{ - signal(SIGSEGV, sigsegv_cb); - alarm(10); - for(;;) - { - rdtsc(); - if (should_segv) - { - fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n"); - exit(0); - } - if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0) - { - perror("prctl"); - exit(0); - } - should_segv = 1; - } -} - - -int main(void) -{ - int n_tasks = 100, i; - - fprintf(stderr, "[No further output means we're allright]\n"); - - for (i=0; i -#include -#include -#include -#include - - -#include -#include - -/* Get/set the process' ability to use the timestamp counter instruction */ -#ifndef PR_GET_TSC -#define PR_GET_TSC 25 -#define PR_SET_TSC 26 -# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ -# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ -#endif - -const char *tsc_names[] = -{ - [0] = "[not set]", - [PR_TSC_ENABLE] = "PR_TSC_ENABLE", - [PR_TSC_SIGSEGV] = "PR_TSC_SIGSEGV", -}; - -static uint64_t rdtsc(void) -{ -uint32_t lo, hi; -/* We cannot use "=A", since this would use %rax on x86_64 */ -__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); -return (uint64_t)hi << 32 | lo; -} - -static void sigsegv_cb(int sig) -{ - int tsc_val = 0; - - printf("[ SIG_SEGV ]\n"); - printf("prctl(PR_GET_TSC, &tsc_val); "); - fflush(stdout); - - if ( prctl(PR_GET_TSC, &tsc_val) == -1) - perror("prctl"); - - printf("tsc_val == %s\n", tsc_names[tsc_val]); - printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n"); - fflush(stdout); - if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1) - perror("prctl"); - - printf("rdtsc() == "); -} - -int main(void) -{ - int tsc_val = 0; - - signal(SIGSEGV, sigsegv_cb); - - printf("rdtsc() == %llu\n", (unsigned long long)rdtsc()); - printf("prctl(PR_GET_TSC, &tsc_val); "); - fflush(stdout); - - if ( prctl(PR_GET_TSC, &tsc_val) == -1) - perror("prctl"); - - printf("tsc_val == %s\n", tsc_names[tsc_val]); - printf("rdtsc() == %llu\n", (unsigned long long)rdtsc()); - printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n"); - fflush(stdout); - - if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1) - perror("prctl"); - - printf("rdtsc() == %llu\n", (unsigned long long)rdtsc()); - printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV)\n"); - fflush(stdout); - - if ( prctl(PR_SET_TSC, PR_TSC_SIGSEGV) == -1) - perror("prctl"); - - printf("rdtsc() == "); - fflush(stdout); - printf("%llu\n", (unsigned long long)rdtsc()); - fflush(stdout); - - exit(EXIT_SUCCESS); -} - diff --git a/tools/testing/selftests/prctl/.gitignore b/tools/testing/selftests/prctl/.gitignore new file mode 100644 index 000000000000..0b5c27447bf6 --- /dev/null +++ b/tools/testing/selftests/prctl/.gitignore @@ -0,0 +1,3 @@ +disable-tsc-ctxt-sw-stress-test +disable-tsc-on-off-stress-test +disable-tsc-test diff --git a/tools/testing/selftests/prctl/Makefile b/tools/testing/selftests/prctl/Makefile new file mode 100644 index 000000000000..35aa1c8f2df2 --- /dev/null +++ b/tools/testing/selftests/prctl/Makefile @@ -0,0 +1,15 @@ +ifndef CROSS_COMPILE +uname_M := $(shell uname -m 2>/dev/null || echo not) +ARCH ?= $(shell echo $(uname_M) | sed -e s/i.86/x86/ -e s/x86_64/x86/) + +ifeq ($(ARCH),x86) +TEST_PROGS := disable-tsc-ctxt-sw-stress-test disable-tsc-on-off-stress-test \ + disable-tsc-test +all: $(TEST_PROGS) + +include ../lib.mk + +clean: + rm -fr $(TEST_PROGS) +endif +endif diff --git a/tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c b/tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c new file mode 100644 index 000000000000..f7499d1c0415 --- /dev/null +++ b/tools/testing/selftests/prctl/disable-tsc-ctxt-sw-stress-test.c @@ -0,0 +1,97 @@ +/* + * Tests for prctl(PR_GET_TSC, ...) / prctl(PR_SET_TSC, ...) + * + * Tests if the control register is updated correctly + * at context switches + * + * Warning: this test will cause a very high load for a few seconds + * + */ + +#include +#include +#include +#include +#include +#include + + +#include +#include + +/* Get/set the process' ability to use the timestamp counter instruction */ +#ifndef PR_GET_TSC +#define PR_GET_TSC 25 +#define PR_SET_TSC 26 +# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ +# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ +#endif + +static uint64_t rdtsc(void) +{ +uint32_t lo, hi; +/* We cannot use "=A", since this would use %rax on x86_64 */ +__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); +return (uint64_t)hi << 32 | lo; +} + +static void sigsegv_expect(int sig) +{ + /* */ +} + +static void segvtask(void) +{ + if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0) + { + perror("prctl"); + exit(0); + } + signal(SIGSEGV, sigsegv_expect); + alarm(10); + rdtsc(); + fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n"); + exit(0); +} + + +static void sigsegv_fail(int sig) +{ + fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n"); + exit(0); +} + +static void rdtsctask(void) +{ + if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0) + { + perror("prctl"); + exit(0); + } + signal(SIGSEGV, sigsegv_fail); + alarm(10); + for(;;) rdtsc(); +} + + +int main(void) +{ + int n_tasks = 100, i; + + fprintf(stderr, "[No further output means we're allright]\n"); + + for (i=0; i +#include +#include +#include +#include +#include + + +#include +#include + +/* Get/set the process' ability to use the timestamp counter instruction */ +#ifndef PR_GET_TSC +#define PR_GET_TSC 25 +#define PR_SET_TSC 26 +# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ +# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ +#endif + +/* snippet from wikipedia :-) */ + +static uint64_t rdtsc(void) +{ +uint32_t lo, hi; +/* We cannot use "=A", since this would use %rax on x86_64 */ +__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); +return (uint64_t)hi << 32 | lo; +} + +int should_segv = 0; + +static void sigsegv_cb(int sig) +{ + if (!should_segv) + { + fprintf(stderr, "FATAL ERROR, rdtsc() failed while enabled\n"); + exit(0); + } + if (prctl(PR_SET_TSC, PR_TSC_ENABLE) < 0) + { + perror("prctl"); + exit(0); + } + should_segv = 0; + + rdtsc(); +} + +static void task(void) +{ + signal(SIGSEGV, sigsegv_cb); + alarm(10); + for(;;) + { + rdtsc(); + if (should_segv) + { + fprintf(stderr, "FATAL ERROR, rdtsc() succeeded while disabled\n"); + exit(0); + } + if (prctl(PR_SET_TSC, PR_TSC_SIGSEGV) < 0) + { + perror("prctl"); + exit(0); + } + should_segv = 1; + } +} + + +int main(void) +{ + int n_tasks = 100, i; + + fprintf(stderr, "[No further output means we're allright]\n"); + + for (i=0; i +#include +#include +#include +#include + + +#include +#include + +/* Get/set the process' ability to use the timestamp counter instruction */ +#ifndef PR_GET_TSC +#define PR_GET_TSC 25 +#define PR_SET_TSC 26 +# define PR_TSC_ENABLE 1 /* allow the use of the timestamp counter */ +# define PR_TSC_SIGSEGV 2 /* throw a SIGSEGV instead of reading the TSC */ +#endif + +const char *tsc_names[] = +{ + [0] = "[not set]", + [PR_TSC_ENABLE] = "PR_TSC_ENABLE", + [PR_TSC_SIGSEGV] = "PR_TSC_SIGSEGV", +}; + +static uint64_t rdtsc(void) +{ +uint32_t lo, hi; +/* We cannot use "=A", since this would use %rax on x86_64 */ +__asm__ __volatile__ ("rdtsc" : "=a" (lo), "=d" (hi)); +return (uint64_t)hi << 32 | lo; +} + +static void sigsegv_cb(int sig) +{ + int tsc_val = 0; + + printf("[ SIG_SEGV ]\n"); + printf("prctl(PR_GET_TSC, &tsc_val); "); + fflush(stdout); + + if ( prctl(PR_GET_TSC, &tsc_val) == -1) + perror("prctl"); + + printf("tsc_val == %s\n", tsc_names[tsc_val]); + printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n"); + fflush(stdout); + if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1) + perror("prctl"); + + printf("rdtsc() == "); +} + +int main(void) +{ + int tsc_val = 0; + + signal(SIGSEGV, sigsegv_cb); + + printf("rdtsc() == %llu\n", (unsigned long long)rdtsc()); + printf("prctl(PR_GET_TSC, &tsc_val); "); + fflush(stdout); + + if ( prctl(PR_GET_TSC, &tsc_val) == -1) + perror("prctl"); + + printf("tsc_val == %s\n", tsc_names[tsc_val]); + printf("rdtsc() == %llu\n", (unsigned long long)rdtsc()); + printf("prctl(PR_SET_TSC, PR_TSC_ENABLE)\n"); + fflush(stdout); + + if ( prctl(PR_SET_TSC, PR_TSC_ENABLE) == -1) + perror("prctl"); + + printf("rdtsc() == %llu\n", (unsigned long long)rdtsc()); + printf("prctl(PR_SET_TSC, PR_TSC_SIGSEGV)\n"); + fflush(stdout); + + if ( prctl(PR_SET_TSC, PR_TSC_SIGSEGV) == -1) + perror("prctl"); + + printf("rdtsc() == "); + fflush(stdout); + printf("%llu\n", (unsigned long long)rdtsc()); + fflush(stdout); + + exit(EXIT_SUCCESS); +} + -- cgit v1.2.3