KVM: selftests: Use __KVM_SYSCALL_ERROR() to handle non-KVM syscall errors

Use __KVM_SYSCALL_ERROR() to report and pretty print non-KVM syscall and
ioctl errors, e.g. for mmap(), munmap(), uffd ioctls, etc...
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/aarch64/vgic_irq.c

@@ -630,8 +630,7 @@ static void kvm_routing_and_irqfd_check(struct kvm_vm *vm,
 
 	for (f = 0, i = intid; i < (uint64_t)intid + num; i++, f++) {
 		fd[f] = eventfd(0, 0);
-		TEST_ASSERT(fd[f] != -1,
-			"eventfd failed, errno: %i\n", errno);
+		TEST_ASSERT(fd[f] != -1, __KVM_SYSCALL_ERROR("eventfd()", fd[f]));
 	}
 
 	for (f = 0, i = intid; i < (uint64_t)intid + num; i++, f++) {
@@ -647,7 +646,7 @@ static void kvm_routing_and_irqfd_check(struct kvm_vm *vm,
 		val = 1;
 		ret = write(fd[f], &val, sizeof(uint64_t));
 		TEST_ASSERT(ret == sizeof(uint64_t),
-			"Write to KVM_IRQFD failed with ret: %d\n", ret);
+			    __KVM_SYSCALL_ERROR("write()", ret));
 	}
 
 	for (f = 0, i = intid; i < (uint64_t)intid + num; i++, f++)

tools/testing/selftests/kvm/demand_paging_test.c

@@ -223,6 +223,7 @@ static void setup_demand_paging(struct kvm_vm *vm,
 	struct uffdio_api uffdio_api;
 	struct uffdio_register uffdio_register;
 	uint64_t expected_ioctls = ((uint64_t) 1) << _UFFDIO_COPY;
+	int ret;
 
 	PER_PAGE_DEBUG("Userfaultfd %s mode, faults resolved with %s\n",
 		       is_minor ? "MINOR" : "MISSING",
@@ -242,19 +243,18 @@ static void setup_demand_paging(struct kvm_vm *vm,
 	}
 
 	uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
-	TEST_ASSERT(uffd >= 0, "uffd creation failed, errno: %d", errno);
+	TEST_ASSERT(uffd >= 0, __KVM_SYSCALL_ERROR("userfaultfd()", uffd));
 
 	uffdio_api.api = UFFD_API;
 	uffdio_api.features = 0;
-	TEST_ASSERT(ioctl(uffd, UFFDIO_API, &uffdio_api) != -1,
-		    "ioctl UFFDIO_API failed: %" PRIu64,
-		    (uint64_t)uffdio_api.api);
+	ret = ioctl(uffd, UFFDIO_API, &uffdio_api);
+	TEST_ASSERT(ret != -1, __KVM_SYSCALL_ERROR("UFFDIO_API", ret));
 
 	uffdio_register.range.start = (uint64_t)hva;
 	uffdio_register.range.len = len;
 	uffdio_register.mode = uffd_mode;
-	TEST_ASSERT(ioctl(uffd, UFFDIO_REGISTER, &uffdio_register) != -1,
-		    "ioctl UFFDIO_REGISTER failed");
+	ret = ioctl(uffd, UFFDIO_REGISTER, &uffdio_register);
+	TEST_ASSERT(ret != -1, __KVM_SYSCALL_ERROR("UFFDIO_REGISTER", ret));
 	TEST_ASSERT((uffdio_register.ioctls & expected_ioctls) ==
 		    expected_ioctls, "missing userfaultfd ioctls");
 

tools/testing/selftests/kvm/lib/kvm_util.c

@@ -517,17 +517,15 @@ static void vm_vcpu_rm(struct kvm_vm *vm, struct vcpu *vcpu)
 
 	if (vcpu->dirty_gfns) {
 		ret = munmap(vcpu->dirty_gfns, vm->dirty_ring_size);
-		TEST_ASSERT(ret == 0, "munmap of VCPU dirty ring failed, "
-			    "rc: %i errno: %i", ret, errno);
+		TEST_ASSERT(!ret, __KVM_SYSCALL_ERROR("munmap()", ret));
 		vcpu->dirty_gfns = NULL;
 	}
 
 	ret = munmap(vcpu->state, vcpu_mmap_sz());
-	TEST_ASSERT(ret == 0, "munmap of VCPU fd failed, rc: %i "
-		"errno: %i", ret, errno);
+	TEST_ASSERT(!ret, __KVM_SYSCALL_ERROR("munmap()", ret));
+
 	ret = close(vcpu->fd);
-	TEST_ASSERT(ret == 0, "Close of VCPU fd failed, rc: %i "
-		"errno: %i", ret, errno);
+	TEST_ASSERT(!ret,  __KVM_SYSCALL_ERROR("close()", ret));
 
 	list_del(&vcpu->list);
 	free(vcpu);
@@ -542,12 +540,10 @@ void kvm_vm_release(struct kvm_vm *vmp)
 		vm_vcpu_rm(vmp, vcpu);
 
 	ret = close(vmp->fd);
-	TEST_ASSERT(ret == 0, "Close of vm fd failed,\n"
-		"  vmp->fd: %i rc: %i errno: %i", vmp->fd, ret, errno);
+	TEST_ASSERT(!ret,  __KVM_SYSCALL_ERROR("close()", ret));
 
 	ret = close(vmp->kvm_fd);
-	TEST_ASSERT(ret == 0, "Close of /dev/kvm fd failed,\n"
-		"  vmp->kvm_fd: %i rc: %i errno: %i", vmp->kvm_fd, ret, errno);
+	TEST_ASSERT(!ret,  __KVM_SYSCALL_ERROR("close()", ret));
 }
 
 static void __vm_mem_region_delete(struct kvm_vm *vm,
@@ -567,7 +563,7 @@ static void __vm_mem_region_delete(struct kvm_vm *vm,
 
 	sparsebit_free(&region->unused_phy_pages);
 	ret = munmap(region->mmap_start, region->mmap_size);
-	TEST_ASSERT(ret == 0, "munmap failed, rc: %i errno: %i", ret, errno);
+	TEST_ASSERT(!ret, __KVM_SYSCALL_ERROR("munmap()", ret));
 
 	free(region);
 }
@@ -607,14 +603,13 @@ int kvm_memfd_alloc(size_t size, bool hugepages)
 		memfd_flags |= MFD_HUGETLB;
 
 	fd = memfd_create("kvm_selftest", memfd_flags);
-	TEST_ASSERT(fd != -1, "memfd_create() failed, errno: %i (%s)",
-		    errno, strerror(errno));
+	TEST_ASSERT(fd != -1, __KVM_SYSCALL_ERROR("memfd_create()", fd));
 
 	r = ftruncate(fd, size);
-	TEST_ASSERT(!r, "ftruncate() failed, errno: %i (%s)", errno, strerror(errno));
+	TEST_ASSERT(!r, __KVM_SYSCALL_ERROR("ftruncate()", r));
 
 	r = fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, size);
-	TEST_ASSERT(!r, "fallocate() failed, errno: %i (%s)", errno, strerror(errno));
+	TEST_ASSERT(!r, __KVM_SYSCALL_ERROR("fallocate()", r));
 
 	return fd;
 }
@@ -880,8 +875,7 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
 				  vm_mem_backing_src_alias(src_type)->flag,
 				  region->fd, 0);
 	TEST_ASSERT(region->mmap_start != MAP_FAILED,
-		    "test_malloc failed, mmap_start: %p errno: %i",
-		    region->mmap_start, errno);
+		    __KVM_SYSCALL_ERROR("mmap()", (int)(unsigned long)MAP_FAILED));
 
 	TEST_ASSERT(!is_backing_src_hugetlb(src_type) ||
 		    region->mmap_start == align_ptr_up(region->mmap_start, backing_src_pagesz),
@@ -929,7 +923,7 @@ void vm_userspace_mem_region_add(struct kvm_vm *vm,
 					  vm_mem_backing_src_alias(src_type)->flag,
 					  region->fd, 0);
 		TEST_ASSERT(region->mmap_alias != MAP_FAILED,
-			    "mmap of alias failed, errno: %i", errno);
+			    __KVM_SYSCALL_ERROR("mmap()",  (int)(unsigned long)MAP_FAILED));
 
 		/* Align host alias address */
 		region->host_alias = align_ptr_up(region->mmap_alias, alignment);
@@ -1115,8 +1109,8 @@ void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid)
 		vcpu_mmap_sz(), sizeof(*vcpu->state));
 	vcpu->state = (struct kvm_run *) mmap(NULL, vcpu_mmap_sz(),
 		PROT_READ | PROT_WRITE, MAP_SHARED, vcpu->fd, 0);
-	TEST_ASSERT(vcpu->state != MAP_FAILED, "mmap vcpu_state failed, "
-		"vcpu id: %u errno: %i", vcpuid, errno);
+	TEST_ASSERT(vcpu->state != MAP_FAILED,
+		    __KVM_SYSCALL_ERROR("mmap()", (int)(unsigned long)MAP_FAILED));
 
 	/* Add to linked-list of VCPUs. */
 	list_add(&vcpu->list, &vm->vcpus);