linux-kernel - [PATCH 008/128] KVM: selftests: Split vcpu_set_nested

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Message-Id: <20220504224914.1654036-9-seanjc@google.com>
Date:   Wed,  4 May 2022 22:47:14 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Andrew Jones <drjones@...hat.com>,
        David Matlack <dmatlack@...gle.com>,
        Ben Gardon <bgardon@...gle.com>,
        Oliver Upton <oupton@...gle.com>,
        Sean Christopherson <seanjc@...gle.com>
Subject: [PATCH 008/128] KVM: selftests: Split vcpu_set_nested_state() into
 two helpers

Split vcpu_nested_state_set() into a wrapper that asserts, and an inner
helper that does not.  Passing a bool is all kinds of awful as it's
unintuitive for readers and requires returning an 'int' from a function
that for most users can never return anything other than "success".

Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 .../selftests/kvm/include/kvm_util_base.h     |  6 ++++--
 tools/testing/selftests/kvm/lib/kvm_util.c    | 20 +++++++++----------
 .../kvm/x86_64/vmx_set_nested_state_test.c    |  4 ++--
 3 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index f6984b0c3816..314d971c1f06 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -261,8 +261,10 @@ void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid,
 #ifdef __x86_64__
 void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid,
 			   struct kvm_nested_state *state);
-int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
-			  struct kvm_nested_state *state, bool ignore_error);
+int __vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
+			    struct kvm_nested_state *state);
+void vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
+			   struct kvm_nested_state *state);
 #endif
 void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid);
 
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index bab4ab297fcc..7b339f98070b 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1826,22 +1826,22 @@ void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid,
 		ret, errno);
 }
 
-int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
-			  struct kvm_nested_state *state, bool ignore_error)
+int __vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
+			    struct kvm_nested_state *state)
 {
 	struct vcpu *vcpu = vcpu_find(vm, vcpuid);
-	int ret;
 
 	TEST_ASSERT(vcpu != NULL, "vcpu not found, vcpuid: %u", vcpuid);
 
-	ret = ioctl(vcpu->fd, KVM_SET_NESTED_STATE, state);
-	if (!ignore_error) {
-		TEST_ASSERT(ret == 0,
-			"KVM_SET_NESTED_STATE failed, ret: %i errno: %i",
-			ret, errno);
-	}
+	return ioctl(vcpu->fd, KVM_SET_NESTED_STATE, state);
+}
 
-	return ret;
+void vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
+			   struct kvm_nested_state *state)
+{
+	int ret = __vcpu_nested_state_set(vm, vcpuid, state);
+
+	TEST_ASSERT(!ret, "KVM_SET_NESTED_STATE failed, ret: %i errno: %i", ret, errno);
 }
 #endif
 
diff --git a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
index 5827b9bae468..af3b60eb35ec 100644
--- a/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
+++ b/tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c
@@ -29,7 +29,7 @@ bool have_evmcs;
 
 void test_nested_state(struct kvm_vm *vm, struct kvm_nested_state *state)
 {
-	vcpu_nested_state_set(vm, VCPU_ID, state, false);
+	vcpu_nested_state_set(vm, VCPU_ID, state);
 }
 
 void test_nested_state_expect_errno(struct kvm_vm *vm,
@@ -38,7 +38,7 @@ void test_nested_state_expect_errno(struct kvm_vm *vm,
 {
 	int rv;
 
-	rv = vcpu_nested_state_set(vm, VCPU_ID, state, true);
+	rv = __vcpu_nested_state_set(vm, VCPU_ID, state);
 	TEST_ASSERT(rv == -1 && errno == expected_errno,
 		"Expected %s (%d) from vcpu_nested_state_set but got rv: %i errno: %s (%d)",
 		strerror(expected_errno), expected_errno, rv, strerror(errno),
-- 
2.36.0.464.gb9c8b46e94-goog