diff --git a/tools/testing/selftests/kvm/dirty_log_perf_test.c b/tools/testing/selftests/kvm/dirty_log_perf_test.c
index f99e39a672d3..362b946019e9 100644
--- a/tools/testing/selftests/kvm/dirty_log_perf_test.c
+++ b/tools/testing/selftests/kvm/dirty_log_perf_test.c
@@ -132,6 +132,7 @@ struct test_params {
 	bool partition_vcpu_memory_access;
 	enum vm_mem_backing_src_type backing_src;
 	int slots;
+	uint32_t random_seed;
 };
 
 static void toggle_dirty_logging(struct kvm_vm *vm, int slots, bool enable)
@@ -225,6 +226,7 @@ static void run_test(enum vm_guest_mode mode, void *arg)
 				 p->slots, p->backing_src,
 				 p->partition_vcpu_memory_access);
 
+	perf_test_set_random_seed(vm, p->random_seed);
 	perf_test_set_wr_fract(vm, p->wr_fract);
 
 	guest_num_pages = (nr_vcpus * guest_percpu_mem_size) >> vm->page_shift;
@@ -352,7 +354,7 @@ static void help(char *name)
 {
 	puts("");
 	printf("usage: %s [-h] [-i iterations] [-p offset] [-g] "
-	       "[-m mode] [-n] [-b vcpu bytes] [-v vcpus] [-o] [-s mem type]"
+	       "[-m mode] [-n] [-b vcpu bytes] [-v vcpus] [-o] [-r random seed ] [-s mem type]"
 	       "[-x memslots]\n", name);
 	puts("");
 	printf(" -i: specify iteration counts (default: %"PRIu64")\n",
@@ -380,6 +382,7 @@ static void help(char *name)
 	printf(" -v: specify the number of vCPUs to run.\n");
 	printf(" -o: Overlap guest memory accesses instead of partitioning\n"
 	       "     them into a separate region of memory for each vCPU.\n");
+	printf(" -r: specify the starting random seed.\n");
 	backing_src_help("-s");
 	printf(" -x: Split the memory region into this number of memslots.\n"
 	       "     (default: 1)\n");
@@ -396,6 +399,7 @@ int main(int argc, char *argv[])
 		.partition_vcpu_memory_access = true,
 		.backing_src = DEFAULT_VM_MEM_SRC,
 		.slots = 1,
+		.random_seed = time(NULL),
 	};
 	int opt;
 
@@ -406,7 +410,7 @@ int main(int argc, char *argv[])
 
 	guest_modes_append_default();
 
-	while ((opt = getopt(argc, argv, "eghi:p:m:nb:f:v:os:x:")) != -1) {
+	while ((opt = getopt(argc, argv, "eghi:p:m:nb:f:v:or:s:x:")) != -1) {
 		switch (opt) {
 		case 'e':
 			/* 'e' is for evil. */
@@ -442,6 +446,9 @@ int main(int argc, char *argv[])
 		case 'o':
 			p.partition_vcpu_memory_access = false;
 			break;
+		case 'r':
+			p.random_seed = atoi(optarg);
+			break;
 		case 's':
 			p.backing_src = parse_backing_src_type(optarg);
 			break;
diff --git a/tools/testing/selftests/kvm/include/perf_test_util.h b/tools/testing/selftests/kvm/include/perf_test_util.h
index eaa88df0555a..9517956424fc 100644
--- a/tools/testing/selftests/kvm/include/perf_test_util.h
+++ b/tools/testing/selftests/kvm/include/perf_test_util.h
@@ -23,6 +23,7 @@ struct perf_test_vcpu_args {
 	uint64_t gpa;
 	uint64_t gva;
 	uint64_t pages;
+	vm_vaddr_t random_array;
 
 	/* Only used by the host userspace part of the vCPU thread */
 	struct kvm_vcpu *vcpu;
@@ -35,6 +36,7 @@ struct perf_test_args {
 	uint64_t gpa;
 	uint64_t size;
 	uint64_t guest_page_size;
+	uint32_t random_seed;
 	int wr_fract;
 
 	/* Run vCPUs in L2 instead of L1, if the architecture supports it. */
@@ -52,6 +54,7 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
 void perf_test_destroy_vm(struct kvm_vm *vm);
 
 void perf_test_set_wr_fract(struct kvm_vm *vm, int wr_fract);
+void perf_test_set_random_seed(struct kvm_vm *vm, uint32_t random_seed);
 
 void perf_test_start_vcpu_threads(int vcpus, void (*vcpu_fn)(struct perf_test_vcpu_args *));
 void perf_test_join_vcpu_threads(int vcpus);
diff --git a/tools/testing/selftests/kvm/lib/perf_test_util.c b/tools/testing/selftests/kvm/lib/perf_test_util.c
index 9618b37c66f7..8d85923acb4e 100644
--- a/tools/testing/selftests/kvm/lib/perf_test_util.c
+++ b/tools/testing/selftests/kvm/lib/perf_test_util.c
@@ -70,6 +70,35 @@ void perf_test_guest_code(uint32_t vcpu_idx)
 	}
 }
 
+void perf_test_alloc_random_arrays(uint32_t nr_vcpus, uint32_t nr_randoms)
+{
+	struct perf_test_args *pta = &perf_test_args;
+
+	for (uint32_t i = 0; i < nr_vcpus; i++) {
+		pta->vcpu_args[i].random_array = vm_vaddr_alloc(
+			pta->vm,
+			nr_randoms * sizeof(uint32_t),
+			KVM_UTIL_MIN_VADDR);
+		pr_debug("Random row %d vaddr: %p.\n", i, (void *)pta->vcpu_args[i].random_array);
+	}
+}
+
+void perf_test_fill_random_arrays(uint32_t nr_vcpus, uint32_t nr_randoms)
+{
+	struct perf_test_args *pta = &perf_test_args;
+	uint32_t *host_row;
+
+	for (uint32_t i = 0; i < nr_vcpus; i++) {
+		host_row = addr_gva2hva(pta->vm, pta->vcpu_args[i].random_array);
+
+		for (uint32_t j = 0; j < nr_randoms; j++)
+			host_row[j] = random();
+
+		pr_debug("New randoms row %d: %d, %d, %d...\n",
+			 i, host_row[0], host_row[1], host_row[2]);
+	}
+}
+
 void perf_test_setup_vcpus(struct kvm_vm *vm, int nr_vcpus,
 			   struct kvm_vcpu *vcpus[],
 			   uint64_t vcpu_memory_bytes,
@@ -120,8 +149,9 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
 
 	pr_info("Testing guest mode: %s\n", vm_guest_mode_string(mode));
 
-	/* By default vCPUs will write to memory. */
-	pta->wr_fract = 1;
+	/* Set perf_test_args defaults. */
+	pta->wr_fract = 100;
+	pta->random_seed = time(NULL);
 
 	/*
 	 * Snapshot the non-huge page size.  This is used by the guest code to
@@ -211,6 +241,11 @@ struct kvm_vm *perf_test_create_vm(enum vm_guest_mode mode, int nr_vcpus,
 
 	ucall_init(vm, NULL);
 
+	srandom(perf_test_args.random_seed);
+	pr_info("Random seed: %d\n", perf_test_args.random_seed);
+	perf_test_alloc_random_arrays(nr_vcpus, vcpu_memory_bytes >> vm->page_shift);
+	perf_test_fill_random_arrays(nr_vcpus, vcpu_memory_bytes >> vm->page_shift);
+
 	/* Export the shared variables to the guest. */
 	sync_global_to_guest(vm, perf_test_args);
 
@@ -229,6 +264,12 @@ void perf_test_set_wr_fract(struct kvm_vm *vm, int wr_fract)
 	sync_global_to_guest(vm, perf_test_args);
 }
 
+void perf_test_set_random_seed(struct kvm_vm *vm, uint32_t random_seed)
+{
+	perf_test_args.random_seed = random_seed;
+	sync_global_to_guest(vm, perf_test_args);
+}
+
 uint64_t __weak perf_test_nested_pages(int nr_vcpus)
 {
 	return 0;
