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KVM: selftests: Add a KVM syscall wrapper for sched_setaffinity()

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Add and use a KVM wrapper for sched_setaffinity() so that selftests don't
need to manually assert that the syscall succeeded.

No functional change intended.

Link: https://patch.msgid.link/20260731195612.2697986-2-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Sean Christopherson 2026-07-31 12:56:01 -07:00
parent 2f0c30d0d1
commit f766bf3d0a
2 changed files with 3 additions and 4 deletions
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1
tools/testing/selftests/kvm/include/kvm_syscalls.h
View File

@ -95,6 +95,7 @@ __KVM_SYSCALL_DEFINE(fallocate, 4, int, fd, int, mode, loff_t, offset, loff_t, l
__KVM_SYSCALL_DEFINE(ftruncate, 2, unsigned int, fd, off_t, length);
__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);
#define kvm_free_fd(fd) \
do { \

6
tools/testing/selftests/kvm/rseq_test.c
View File

@ -75,7 +75,7 @@ static void *migration_worker(void *__rseq_tid)
{
pid_t rseq_tid = (pid_t)(unsigned long)__rseq_tid;
cpu_set_t allowed_mask;
int r, i, cpu;
int i, cpu;
CPU_ZERO(&allowed_mask);
@ -96,9 +96,7 @@ static void *migration_worker(void *__rseq_tid)
* stable, i.e. while changing affinity is in-progress.
*/
smp_wmb();
r = sched_setaffinity(rseq_tid, sizeof(allowed_mask), &allowed_mask);
TEST_ASSERT(!r, "sched_setaffinity failed, errno = %d (%s)",
errno, strerror(errno));
kvm_sched_setaffinity(rseq_tid, sizeof(allowed_mask), &allowed_mask);
smp_wmb();
atomic_inc(&seq_cnt);