linux-kernel - [RFC PATCH 004/105] KVM: selftests: Make vcpu_ioctl() a wrapper to pretty print ioctl name

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Date:   Fri, 11 Mar 2022 05:49:15 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     linux-kernel@...r.kernel.org
Cc:     Sean Christopherson <seanjc@...gle.com>
Subject: [RFC PATCH 004/105] KVM: selftests: Make vcpu_ioctl() a wrapper to
 pretty print ioctl name

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

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 .../selftests/kvm/include/kvm_util_base.h     | 12 +++++--
 tools/testing/selftests/kvm/lib/kvm_util.c    | 31 +++++--------------
 2 files changed, 18 insertions(+), 25 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index 77aaac4d344e..28440c12ffbc 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -152,10 +152,18 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
 	uint64_t guest_paddr, uint32_t slot, uint64_t npages,
 	uint32_t flags);
 
-void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
-		void *arg);
+#define __KVM_IOCTL_ERROR(_name, _ret) \
+	"%s failed, rc: %i errno: %i (%s)", (_name), (_ret), errno, strerror(errno)
+
+#define KVM_IOCTL_ERROR(_ioctl, _ret) __KVM_IOCTL_ERROR(#_ioctl, _ret)
+
+void _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
+		 const char *name, void *arg);
 int __vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
 		 void *arg);
+#define vcpu_ioctl(vm, vcpuid, ioctl, arg) \
+	_vcpu_ioctl(vm, vcpuid, ioctl, #ioctl, arg)
+
 void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
 int __vm_ioctl(struct kvm_vm *vm, unsigned long cmd, void *arg);
 void kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 6f515333abe0..a6675d9aa7d9 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1898,29 +1898,6 @@ 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)
 {
@@ -1934,6 +1911,14 @@ 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;
-- 
2.35.1.723.g4982287a31-goog