Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Reply-To: Sean Christopherson <seanjc@google.com>
Date:   Fri, 11 Mar 2022 05:50:39 +0000
In-Reply-To: <20220311055056.57265-1-seanjc@google.com>
Message-Id: <20220311055056.57265-89-seanjc@google.com>
Mime-Version: 1.0
References: <20220311055056.57265-1-seanjc@google.com>
Subject: [RFC PATCH 088/105] KVM: selftests: Convert vgic_init away from vm_create_default_with_vcpus()
From:   Sean Christopherson <seanjc@google.com>
To:     linux-kernel@vger.kernel.org
Cc:     Sean Christopherson <seanjc@google.com>
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 .../testing/selftests/kvm/aarch64/vgic_init.c | 79 ++++++++++++-------
 1 file changed, 49 insertions(+), 30 deletions(-)

diff --git a/tools/testing/selftests/kvm/aarch64/vgic_init.c b/tools/testing/selftests/kvm/aarch64/vgic_init.c
index f8d41f12bdca..435c4b762335 100644
--- a/tools/testing/selftests/kvm/aarch64/vgic_init.c
+++ b/tools/testing/selftests/kvm/aarch64/vgic_init.c
@@ -49,19 +49,21 @@ static void guest_code(void)
 }
 
 /* we don't want to assert on run execution, hence that helper */
-static int run_vcpu(struct kvm_vm *vm, uint32_t vcpuid)
+static int run_vcpu(struct kvm_vcpu *vcpu)
 {
-	ucall_init(vm, NULL);
+	ucall_init(vcpu->vm, NULL);
 
-	return __vcpu_run(vm, vcpuid) ? -errno : 0;
+	return __vcpu_run(vcpu->vm, vcpu->id) ? -errno : 0;
 }
 
-static struct vm_gic vm_gic_create_with_vcpus(uint32_t gic_dev_type, uint32_t nr_vcpus)
+static struct vm_gic vm_gic_create_with_vcpus(uint32_t gic_dev_type,
+					      uint32_t nr_vcpus,
+					      struct kvm_vcpu *vcpus[])
 {
 	struct vm_gic v;
 
 	v.gic_dev_type = gic_dev_type;
-	v.vm = vm_create_default_with_vcpus(nr_vcpus, 0, 0, guest_code, NULL);
+	v.vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus);
 	v.gic_fd = kvm_create_device(v.vm, gic_dev_type);
 
 	return v;
@@ -305,10 +307,11 @@ static void subtest_v3_redist_regions(struct vm_gic *v)
  */
 static void test_vgic_then_vcpus(uint32_t gic_dev_type)
 {
+	struct kvm_vcpu *vcpus[NR_VCPUS];
 	struct vm_gic v;
 	int ret, i;
 
-	v = vm_gic_create_with_vcpus(gic_dev_type, 1);
+	v = vm_gic_create_with_vcpus(gic_dev_type, 1, vcpus);
 
 	subtest_dist_rdist(&v);
 
@@ -316,7 +319,7 @@ static void test_vgic_then_vcpus(uint32_t gic_dev_type)
 	for (i = 1; i < NR_VCPUS; ++i)
 		vm_vcpu_add(v.vm, i, guest_code);
 
-	ret = run_vcpu(v.vm, 3);
+	ret = run_vcpu(vcpus[3]);
 	TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
 
 	vm_gic_destroy(&v);
@@ -325,14 +328,15 @@ static void test_vgic_then_vcpus(uint32_t gic_dev_type)
 /* All the VCPUs are created before the VGIC KVM device gets initialized */
 static void test_vcpus_then_vgic(uint32_t gic_dev_type)
 {
+	struct kvm_vcpu *vcpus[NR_VCPUS];
 	struct vm_gic v;
 	int ret;
 
-	v = vm_gic_create_with_vcpus(gic_dev_type, NR_VCPUS);
+	v = vm_gic_create_with_vcpus(gic_dev_type, NR_VCPUS, vcpus);
 
 	subtest_dist_rdist(&v);
 
-	ret = run_vcpu(v.vm, 3);
+	ret = run_vcpu(vcpus[3]);
 	TEST_ASSERT(ret == -EINVAL, "dist/rdist overlap detected on 1st vcpu run");
 
 	vm_gic_destroy(&v);
@@ -340,37 +344,38 @@ static void test_vcpus_then_vgic(uint32_t gic_dev_type)
 
 static void test_v3_new_redist_regions(void)
 {
+	struct kvm_vcpu *vcpus[NR_VCPUS];
 	void *dummy = NULL;
 	struct vm_gic v;
 	uint64_t addr;
 	int ret;
 
-	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS);
+	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
 	subtest_v3_redist_regions(&v);
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
 			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
 
-	ret = run_vcpu(v.vm, 3);
+	ret = run_vcpu(vcpus[3]);
 	TEST_ASSERT(ret == -ENXIO, "running without sufficient number of rdists");
 	vm_gic_destroy(&v);
 
 	/* step2 */
 
-	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS);
+	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
 	subtest_v3_redist_regions(&v);
 
 	addr = REDIST_REGION_ATTR_ADDR(1, 0x280000, 0, 2);
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
 			    KVM_VGIC_V3_ADDR_TYPE_REDIST_REGION, &addr);
 
-	ret = run_vcpu(v.vm, 3);
+	ret = run_vcpu(vcpus[3]);
 	TEST_ASSERT(ret == -EBUSY, "running without vgic explicit init");
 
 	vm_gic_destroy(&v);
 
 	/* step 3 */
 
-	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS);
+	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
 	subtest_v3_redist_regions(&v);
 
 	ret = __kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_ADDR,
@@ -385,7 +390,7 @@ static void test_v3_new_redist_regions(void)
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
 			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
 
-	ret = run_vcpu(v.vm, 3);
+	ret = run_vcpu(vcpus[3]);
 	TEST_ASSERT(!ret, "vcpu run");
 
 	vm_gic_destroy(&v);
@@ -393,26 +398,27 @@ static void test_v3_new_redist_regions(void)
 
 static void test_v3_typer_accesses(void)
 {
+	struct kvm_vcpu *vcpus[NR_VCPUS];
 	struct vm_gic v;
 	uint64_t addr;
 	uint32_t val;
 	int ret, i;
 
-	v.vm = vm_create_default(0, 0, guest_code);
+	v.vm = vm_create_with_one_vcpu(&vcpus[0], guest_code);
 
 	v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);
 
-	vm_vcpu_add(v.vm, 3, guest_code);
+	vcpus[3] = vm_vcpu_add(v.vm, 3, guest_code);
 
 	ret = v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, &val);
 	TEST_ASSERT(ret && errno == EINVAL, "attempting to read GICR_TYPER of non created vcpu");
 
-	vm_vcpu_add(v.vm, 1, guest_code);
+	vcpus[1] = vm_vcpu_add(v.vm, 1, guest_code);
 
 	ret = v3_redist_reg_get(v.gic_fd, 1, GICR_TYPER, &val);
 	TEST_ASSERT(ret && errno == EBUSY, "read GICR_TYPER before GIC initialized");
 
-	vm_vcpu_add(v.vm, 2, guest_code);
+	vcpus[2] = vm_vcpu_add(v.vm, 2, guest_code);
 
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
 			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
@@ -460,6 +466,21 @@ static void test_v3_typer_accesses(void)
 	vm_gic_destroy(&v);
 }
 
+static struct vm_gic vm_gic_v3_create_with_vcpuids(int nr_vcpus,
+						   uint32_t vcpuids[])
+{
+	struct vm_gic v;
+	int i;
+
+	v.vm = vm_create_with_vcpus(0, NULL, NULL);
+	for (i = 0; i < nr_vcpus; i++)
+		vm_vcpu_add(v.vm, vcpuids[i], guest_code);
+
+	v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);
+
+	return v;
+}
+
 /**
  * Test GICR_TYPER last bit with new redist regions
  * rdist regions #1 and #2 are contiguous
@@ -478,9 +499,7 @@ static void test_v3_last_bit_redist_regions(void)
 	uint32_t val;
 	int ret;
 
-	v.vm = vm_create_default_with_vcpus(6, 0, 0, guest_code, vcpuids);
-
-	v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);
+	v = vm_gic_v3_create_with_vcpuids(ARRAY_SIZE(vcpuids), vcpuids);
 
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
 			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
@@ -527,9 +546,7 @@ static void test_v3_last_bit_single_rdist(void)
 	uint32_t val;
 	int ret;
 
-	v.vm = vm_create_default_with_vcpus(6, 0, 0, guest_code, vcpuids);
-
-	v.gic_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_V3);
+	v = vm_gic_v3_create_with_vcpuids(ARRAY_SIZE(vcpuids), vcpuids);
 
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
 			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
@@ -559,11 +576,12 @@ static void test_v3_last_bit_single_rdist(void)
 /* Uses the legacy REDIST region API. */
 static void test_v3_redist_ipa_range_check_at_vcpu_run(void)
 {
+	struct kvm_vcpu *vcpus[NR_VCPUS];
 	struct vm_gic v;
 	int ret, i;
 	uint64_t addr;
 
-	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, 1);
+	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, 1, vcpus);
 
 	/* Set space for 3 redists, we have 1 vcpu, so this succeeds. */
 	addr = max_phys_size - (3 * 2 * 0x10000);
@@ -576,13 +594,13 @@ static void test_v3_redist_ipa_range_check_at_vcpu_run(void)
 
 	/* Add the rest of the VCPUs */
 	for (i = 1; i < NR_VCPUS; ++i)
-		vm_vcpu_add(v.vm, i, guest_code);
+		vcpus[i] = vm_vcpu_add(v.vm, i, guest_code);
 
 	kvm_device_attr_set(v.gic_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
 			    KVM_DEV_ARM_VGIC_CTRL_INIT, NULL);
 
 	/* Attempt to run a vcpu without enough redist space. */
-	ret = run_vcpu(v.vm, 2);
+	ret = run_vcpu(vcpus[2]);
 	TEST_ASSERT(ret && errno == EINVAL,
 		"redist base+size above PA range detected on 1st vcpu run");
 
@@ -591,11 +609,12 @@ static void test_v3_redist_ipa_range_check_at_vcpu_run(void)
 
 static void test_v3_its_region(void)
 {
+	struct kvm_vcpu *vcpus[NR_VCPUS];
 	struct vm_gic v;
 	uint64_t addr;
 	int its_fd, ret;
 
-	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS);
+	v = vm_gic_create_with_vcpus(KVM_DEV_TYPE_ARM_VGIC_V3, NR_VCPUS, vcpus);
 	its_fd = kvm_create_device(v.vm, KVM_DEV_TYPE_ARM_VGIC_ITS);
 
 	addr = 0x401000;
@@ -639,7 +658,7 @@ int test_kvm_device(uint32_t gic_dev_type)
 	uint32_t other;
 	int ret;
 
-	v.vm = vm_create_default_with_vcpus(NR_VCPUS, 0, 0, guest_code, NULL);
+	v.vm = vm_create_with_vcpus(NR_VCPUS, guest_code, NULL);
 
 	/* try to create a non existing KVM device */
 	ret = __kvm_test_create_device(v.vm, 0);
-- 
2.35.1.723.g4982287a31-goog