KVM: selftests: Make vcpu_ioctl() a wrapper to pretty print ioctl name

Make vcpu_ioctl() a macro wrapper and pretty the _name_ of the ioctl on
failure instead of the number.  Add inner macros to allow handling cases
where the name of the ioctl needs to be resolved higher up the stack, and
to allow using the formatting for non-ioctl syscalls without being
technically wrong.

Deliberately do not use __stringify(), as that will expand the ioctl all
the way down to its numerical sequence, again the intent is to print the
name of the macro.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 8 insertions, 23 deletions

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 03c1f885a98b..fdcaf74b5959 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1937,29 +1937,6 @@ void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg)
 		    ret, errno, strerror(errno));
 }
 
-/*
- * VCPU Ioctl
- *
- * Input Args:
- *   vm - Virtual Machine
- *   vcpuid - VCPU ID
- *   cmd - Ioctl number
- *   arg - Argument to pass to the ioctl
- *
- * Return: None
- *
- * Issues an arbitrary ioctl on a VCPU fd.
- */
-void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid,
-		unsigned long cmd, void *arg)
-{
-	int ret;
-
-	ret = __vcpu_ioctl(vm, vcpuid, cmd, arg);
-	TEST_ASSERT(ret == 0, "vcpu ioctl %lu failed, rc: %i errno: %i (%s)",
-		cmd, ret, errno, strerror(errno));
-}
-
 int __vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid,
 		 unsigned long cmd, void *arg)
 {
@@ -1973,6 +1950,14 @@ int __vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid,
 	return ret;
 }
 
+void _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long cmd,
+		 const char *name, void *arg)
+{
+	int ret = __vcpu_ioctl(vm, vcpuid, cmd, arg);
+
+	TEST_ASSERT(!ret, __KVM_IOCTL_ERROR(name, ret));
+}
+
 void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid)
 {
 	struct vcpu *vcpu;