[PATCH v2 11/12] KVM: selftests: Add KVM syscall wrappers for pthread_{g,s}etaffinity_np()

[Sean Christopherson <seanjc@google.com>]

Add and use KVM wrappers for pthread_{g,s}etaffinity_np() so that selftests
don't need to manually assert that the syscalls succeeded, and so that they
don't need to manually pass in sizeof(cpu_set_t) for the size.

Note, the steal time test didn't assert success, but the TEST_ASSERT() one
line later makes it quite clear the test relies on pthread_getaffinity_np()
succeeding.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 .../testing/selftests/kvm/include/kvm_syscalls.h | 16 ++++++++++++++++
 tools/testing/selftests/kvm/steal_time.c         |  2 +-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_syscalls.h b/tools/testing/selftests/kvm/include/kvm_syscalls.h
index c0657e54aee5..dc7461894aef 100644
--- a/tools/testing/selftests/kvm/include/kvm_syscalls.h
+++ b/tools/testing/selftests/kvm/include/kvm_syscalls.h
@@ -98,6 +98,22 @@ __KVM_SYSCALL_DEFINE(madvise, 3, void *, addr, size_t, length, int, advice);
 __KVM_SYSCALL_DEFINE(sched_getaffinity, 3, pid_t, pid, size_t, cpusetsize, cpu_set_t *, mask);
 __KVM_SYSCALL_DEFINE(sched_setaffinity, 3, pid_t, pid, size_t, cpusetsize, cpu_set_t *, mask);
 
+__KVM_SYSCALL_DEFINE(pthread_getaffinity_np, 3, pthread_t, thread,
+		     size_t, cpusetsize, cpu_set_t *, cpuset);
+__KVM_SYSCALL_DEFINE(pthread_setaffinity_np, 3, pthread_t, thread,
+		     size_t, cpusetsize, const cpu_set_t *, cpuset);
+
+static inline void kvm_pthread_getaffinity(pthread_t thread, cpu_set_t *cpuset)
+{
+	kvm_pthread_getaffinity_np(thread, sizeof(cpu_set_t), cpuset);
+}
+
+static inline void kvm_pthread_setaffinity(pthread_t thread,
+					   const cpu_set_t *cpuset)
+{
+	kvm_pthread_setaffinity_np(thread, sizeof(cpu_set_t), cpuset);
+}
+
 typedef void *(*pthread_fn_t)(void *);
 __KVM_SYSCALL_DEFINE(pthread_create, 4, pthread_t *, thread,
 		     const pthread_attr_t *, attr, pthread_fn_t, fn, void *, arg);
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c
index 6cb1eb4c40c9..bc3c62b72c58 100644
--- a/tools/testing/selftests/kvm/steal_time.c
+++ b/tools/testing/selftests/kvm/steal_time.c
@@ -549,7 +549,7 @@ int main(int ac, char **av)
 		/* Steal time from the VCPU. The steal time thread has the same CPU affinity as the VCPUs. */
 		run_delay = get_run_delay();
 		kvm_pthread_create(&thread, NULL, do_steal_time, NULL);
-		pthread_getaffinity_np(thread, sizeof(cpuset), &cpuset);
+		kvm_pthread_getaffinity(thread, &cpuset);
 		TEST_ASSERT(CPU_COUNT(&cpuset) == 1 && CPU_ISSET(cpu, &cpuset),
 			    "Worker failed to inherit parent's CPU affinity");
 
-- 
2.55.0.508.g3f0d502094-goog