1// SPDX-License-Identifier: GPL-2.0
2/*
3 * tools/testing/selftests/kvm/include/memstress.h
4 *
5 * Copyright (C) 2020, Google LLC.
6 */
7
8#ifndef SELFTEST_KVM_MEMSTRESS_H
9#define SELFTEST_KVM_MEMSTRESS_H
10
11#include <pthread.h>
12
13#include "kvm_util.h"
14
15/* Default guest test virtual memory offset */
16#define DEFAULT_GUEST_TEST_MEM		0xc0000000
17
18#define DEFAULT_PER_VCPU_MEM_SIZE	(1 << 30) /* 1G */
19
20#define MEMSTRESS_MEM_SLOT_INDEX	1
21
22struct memstress_vcpu_args {
23	uint64_t gpa;
24	uint64_t gva;
25	uint64_t pages;
26
27	/* Only used by the host userspace part of the vCPU thread */
28	struct kvm_vcpu *vcpu;
29	int vcpu_idx;
30};
31
32struct memstress_args {
33	struct kvm_vm *vm;
34	/* The starting address and size of the guest test region. */
35	uint64_t gpa;
36	uint64_t size;
37	uint64_t guest_page_size;
38	uint32_t random_seed;
39	uint32_t write_percent;
40
41	/* Run vCPUs in L2 instead of L1, if the architecture supports it. */
42	bool nested;
43	/* Randomize which pages are accessed by the guest. */
44	bool random_access;
45	/* True if all vCPUs are pinned to pCPUs */
46	bool pin_vcpus;
47	/* The vCPU=>pCPU pinning map. Only valid if pin_vcpus is true. */
48	uint32_t vcpu_to_pcpu[KVM_MAX_VCPUS];
49
50 	/* Test is done, stop running vCPUs. */
51 	bool stop_vcpus;
52
53	struct memstress_vcpu_args vcpu_args[KVM_MAX_VCPUS];
54};
55
56extern struct memstress_args memstress_args;
57
58struct kvm_vm *memstress_create_vm(enum vm_guest_mode mode, int nr_vcpus,
59				   uint64_t vcpu_memory_bytes, int slots,
60				   enum vm_mem_backing_src_type backing_src,
61				   bool partition_vcpu_memory_access);
62void memstress_destroy_vm(struct kvm_vm *vm);
63
64void memstress_set_write_percent(struct kvm_vm *vm, uint32_t write_percent);
65void memstress_set_random_seed(struct kvm_vm *vm, uint32_t random_seed);
66void memstress_set_random_access(struct kvm_vm *vm, bool random_access);
67
68void memstress_start_vcpu_threads(int vcpus, void (*vcpu_fn)(struct memstress_vcpu_args *));
69void memstress_join_vcpu_threads(int vcpus);
70void memstress_guest_code(uint32_t vcpu_id);
71
72uint64_t memstress_nested_pages(int nr_vcpus);
73void memstress_setup_nested(struct kvm_vm *vm, int nr_vcpus, struct kvm_vcpu *vcpus[]);
74
75void memstress_enable_dirty_logging(struct kvm_vm *vm, int slots);
76void memstress_disable_dirty_logging(struct kvm_vm *vm, int slots);
77void memstress_get_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[], int slots);
78void memstress_clear_dirty_log(struct kvm_vm *vm, unsigned long *bitmaps[],
79			       int slots, uint64_t pages_per_slot);
80unsigned long **memstress_alloc_bitmaps(int slots, uint64_t pages_per_slot);
81void memstress_free_bitmaps(unsigned long *bitmaps[], int slots);
82
83#endif /* SELFTEST_KVM_MEMSTRESS_H */
84