KVM: selftests: Convert tsc_msrs_test away from VCPU_ID

Convert tsc_msrs_test to use vm_create_with_one_vcpu() and pass around a
'struct kvm_vcpu' object instead of using a global VCPU_ID.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/x86_64/tsc_msrs_test.c

@@ -9,14 +9,12 @@
 #include "kvm_util.h"
 #include "processor.h"
 
-#define VCPU_ID 0
-
 #define UNITY                  (1ull << 30)
 #define HOST_ADJUST            (UNITY * 64)
 #define GUEST_STEP             (UNITY * 4)
 #define ROUND(x)               ((x + UNITY / 2) & -UNITY)
 #define rounded_rdmsr(x)       ROUND(rdmsr(x))
-#define rounded_host_rdmsr(x)  ROUND(vcpu_get_msr(vm, 0, x))
+#define rounded_host_rdmsr(x)  ROUND(vcpu_get_msr(vm, vcpu->id, x))
 
 static void guest_code(void)
 {
@@ -66,15 +64,13 @@ static void guest_code(void)
 	GUEST_DONE();
 }
 
-static void run_vcpu(struct kvm_vm *vm, uint32_t vcpuid, int stage)
+static void run_vcpu(struct kvm_vcpu *vcpu, int stage)
 {
 	struct ucall uc;
 
-	vcpu_args_set(vm, vcpuid, 1, vcpuid);
-
-	vcpu_ioctl(vm, vcpuid, KVM_RUN, NULL);
+	vcpu_run(vcpu->vm, vcpu->id);
 
-	switch (get_ucall(vm, vcpuid, &uc)) {
+	switch (get_ucall(vcpu->vm, vcpu->id, &uc)) {
 	case UCALL_SYNC:
 		TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
 			    uc.args[1] == stage + 1, "Stage %d: Unexpected register values vmexit, got %lx",
@@ -88,29 +84,30 @@ static void run_vcpu(struct kvm_vm *vm, uint32_t vcpuid, int stage)
 			    __FILE__, uc.args[1], uc.args[2], uc.args[3]);
 	default:
 		TEST_ASSERT(false, "Unexpected exit: %s",
-			    exit_reason_str(vcpu_state(vm, vcpuid)->exit_reason));
+			    exit_reason_str(vcpu->run->exit_reason));
 	}
 }
 
 int main(void)
 {
+	struct kvm_vcpu *vcpu;
 	struct kvm_vm *vm;
 	uint64_t val;
 
-	vm = vm_create_default(VCPU_ID, 0, guest_code);
+	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
 
 	val = 0;
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val);
 
 	/* Guest: writes to MSR_IA32_TSC affect both MSRs.  */
-	run_vcpu(vm, VCPU_ID, 1);
+	run_vcpu(vcpu, 1);
 	val = 1ull * GUEST_STEP;
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val);
 
 	/* Guest: writes to MSR_IA32_TSC_ADJUST affect both MSRs.  */
-	run_vcpu(vm, VCPU_ID, 2);
+	run_vcpu(vcpu, 2);
 	val = 2ull * GUEST_STEP;
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val);
@@ -119,18 +116,18 @@ int main(void)
 	 * Host: writes to MSR_IA32_TSC set the host-side offset
 	 * and therefore do not change MSR_IA32_TSC_ADJUST.
 	 */
-	vcpu_set_msr(vm, 0, MSR_IA32_TSC, HOST_ADJUST + val);
+	vcpu_set_msr(vm, vcpu->id, MSR_IA32_TSC, HOST_ADJUST + val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), HOST_ADJUST + val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val);
-	run_vcpu(vm, VCPU_ID, 3);
+	run_vcpu(vcpu, 3);
 
 	/* Host: writes to MSR_IA32_TSC_ADJUST do not modify the TSC.  */
-	vcpu_set_msr(vm, 0, MSR_IA32_TSC_ADJUST, UNITY * 123456);
+	vcpu_set_msr(vm, vcpu->id, MSR_IA32_TSC_ADJUST, UNITY * 123456);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), HOST_ADJUST + val);
-	ASSERT_EQ(vcpu_get_msr(vm, 0, MSR_IA32_TSC_ADJUST), UNITY * 123456);
+	ASSERT_EQ(vcpu_get_msr(vm, vcpu->id, MSR_IA32_TSC_ADJUST), UNITY * 123456);
 
 	/* Restore previous value.  */
-	vcpu_set_msr(vm, 0, MSR_IA32_TSC_ADJUST, val);
+	vcpu_set_msr(vm, vcpu->id, MSR_IA32_TSC_ADJUST, val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), HOST_ADJUST + val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val);
 
@@ -138,7 +135,7 @@ int main(void)
 	 * Guest: writes to MSR_IA32_TSC_ADJUST do not destroy the
 	 * host-side offset and affect both MSRs.
 	 */
-	run_vcpu(vm, VCPU_ID, 4);
+	run_vcpu(vcpu, 4);
 	val = 3ull * GUEST_STEP;
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), HOST_ADJUST + val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val);
@@ -147,7 +144,7 @@ int main(void)
 	 * Guest: writes to MSR_IA32_TSC affect both MSRs, so the host-side
 	 * offset is now visible in MSR_IA32_TSC_ADJUST.
 	 */
-	run_vcpu(vm, VCPU_ID, 5);
+	run_vcpu(vcpu, 5);
 	val = 4ull * GUEST_STEP;
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC), val);
 	ASSERT_EQ(rounded_host_rdmsr(MSR_IA32_TSC_ADJUST), val - HOST_ADJUST);