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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1badac4f80
"basic_test" only asserts that RSEQ works moderately correctly. E.g. that the CPUID pointer works. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Joel Fernandes <joelaf@google.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Watson <davejwatson@fb.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Shuah Khan <shuahkh@osg.samsung.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: linux-kselftest@vger.kernel.org Cc: "H . Peter Anvin" <hpa@zytor.com> Cc: Chris Lameter <cl@linux.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Andrew Hunter <ahh@google.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: "Paul E . McKenney" <paulmck@linux.vnet.ibm.com> Cc: Paul Turner <pjt@google.com> Cc: Boqun Feng <boqun.feng@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ben Maurer <bmaurer@fb.com> Cc: linux-api@vger.kernel.org Cc: Andy Lutomirski <luto@amacapital.net> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lkml.kernel.org/r/20180602124408.8430-14-mathieu.desnoyers@efficios.com
57 lines
1.3 KiB
C
57 lines
1.3 KiB
C
// SPDX-License-Identifier: LGPL-2.1
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/*
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* Basic test coverage for critical regions and rseq_current_cpu().
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*/
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#define _GNU_SOURCE
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#include <assert.h>
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#include <sched.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/time.h>
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#include "rseq.h"
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void test_cpu_pointer(void)
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{
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cpu_set_t affinity, test_affinity;
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int i;
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sched_getaffinity(0, sizeof(affinity), &affinity);
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CPU_ZERO(&test_affinity);
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for (i = 0; i < CPU_SETSIZE; i++) {
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if (CPU_ISSET(i, &affinity)) {
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CPU_SET(i, &test_affinity);
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sched_setaffinity(0, sizeof(test_affinity),
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&test_affinity);
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assert(sched_getcpu() == i);
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assert(rseq_current_cpu() == i);
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assert(rseq_current_cpu_raw() == i);
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assert(rseq_cpu_start() == i);
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CPU_CLR(i, &test_affinity);
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}
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}
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sched_setaffinity(0, sizeof(affinity), &affinity);
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}
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int main(int argc, char **argv)
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{
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if (rseq_register_current_thread()) {
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fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
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errno, strerror(errno));
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goto init_thread_error;
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}
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printf("testing current cpu\n");
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test_cpu_pointer();
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if (rseq_unregister_current_thread()) {
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fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
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errno, strerror(errno));
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goto init_thread_error;
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}
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return 0;
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init_thread_error:
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return -1;
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}
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