1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * tools/testing/selftests/kvm/include/kvm_util.h
5 * Copyright (C) 2018, Google LLC.
7 #ifndef SELFTEST_KVM_UTIL_H
8 #define SELFTEST_KVM_UTIL_H
10 #include "test_util.h"
13 #include "linux/list.h"
14 #include "linux/kvm.h"
15 #include <sys/ioctl.h>
17 #include "sparsebit.h"
21 * Callers of kvm_util only have an incomplete/opaque description of the
22 * structure kvm_util is using to maintain the state of a VM.
26 typedef uint64_t vm_paddr_t; /* Virtual Machine (Guest) physical address */
27 typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
29 /* Minimum allocated guest virtual and physical addresses */
30 #define KVM_UTIL_MIN_VADDR 0x2000
32 #define DEFAULT_GUEST_PHY_PAGES 512
33 #define DEFAULT_GUEST_STACK_VADDR_MIN 0xab6000
34 #define DEFAULT_STACK_PGS 5
43 VM_MODE_PXXV48_4K, /* For 48bits VA but ANY bits PA */
47 #if defined(__aarch64__)
49 #define VM_MODE_DEFAULT VM_MODE_P40V48_4K
50 #define MIN_PAGE_SHIFT 12U
51 #define ptes_per_page(page_size) ((page_size) / 8)
53 #elif defined(__x86_64__)
55 #define VM_MODE_DEFAULT VM_MODE_PXXV48_4K
56 #define MIN_PAGE_SHIFT 12U
57 #define ptes_per_page(page_size) ((page_size) / 8)
59 #elif defined(__s390x__)
61 #define VM_MODE_DEFAULT VM_MODE_P52V48_4K
62 #define MIN_PAGE_SHIFT 12U
63 #define ptes_per_page(page_size) ((page_size) / 16)
67 #define MIN_PAGE_SIZE (1U << MIN_PAGE_SHIFT)
68 #define PTES_PER_MIN_PAGE ptes_per_page(MIN_PAGE_SIZE)
70 #define vm_guest_mode_string(m) vm_guest_mode_string[m]
71 extern const char * const vm_guest_mode_string[];
73 enum vm_mem_backing_src_type {
75 VM_MEM_SRC_ANONYMOUS_THP,
76 VM_MEM_SRC_ANONYMOUS_HUGETLB,
79 int kvm_check_cap(long cap);
80 int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
81 int vcpu_enable_cap(struct kvm_vm *vm, uint32_t vcpu_id,
82 struct kvm_enable_cap *cap);
83 void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size);
85 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
86 void kvm_vm_free(struct kvm_vm *vmp);
87 void kvm_vm_restart(struct kvm_vm *vmp, int perm);
88 void kvm_vm_release(struct kvm_vm *vmp);
89 void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log);
90 void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
91 uint64_t first_page, uint32_t num_pages);
92 uint32_t kvm_vm_reset_dirty_ring(struct kvm_vm *vm);
94 int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva,
97 void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename,
98 uint32_t data_memslot, uint32_t pgd_memslot);
100 void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent);
106 * stream - Output FILE stream
107 * vm - Virtual Machine
109 * indent - Left margin indent amount
115 * Dumps the current state of the VCPU specified by @vcpuid, within the VM
116 * given by @vm, to the FILE stream given by @stream.
118 void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid,
121 void vm_create_irqchip(struct kvm_vm *vm);
123 void vm_userspace_mem_region_add(struct kvm_vm *vm,
124 enum vm_mem_backing_src_type src_type,
125 uint64_t guest_paddr, uint32_t slot, uint64_t npages,
128 void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
130 int _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
132 void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
133 void kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
134 int _kvm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
135 void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags);
136 void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa);
137 void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot);
138 void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid);
139 vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
140 uint32_t data_memslot, uint32_t pgd_memslot);
141 void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
142 unsigned int npages, uint32_t pgd_memslot);
143 void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa);
144 void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva);
145 vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva);
148 * Address Guest Virtual to Guest Physical
151 * vm - Virtual Machine
152 * gva - VM virtual address
157 * Equivalent VM physical address
159 * Returns the VM physical address of the translated VM virtual
160 * address given by @gva.
162 vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva);
164 struct kvm_run *vcpu_state(struct kvm_vm *vm, uint32_t vcpuid);
165 void vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
166 int _vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
167 int vcpu_get_fd(struct kvm_vm *vm, uint32_t vcpuid);
168 void vcpu_run_complete_io(struct kvm_vm *vm, uint32_t vcpuid);
169 void vcpu_set_guest_debug(struct kvm_vm *vm, uint32_t vcpuid,
170 struct kvm_guest_debug *debug);
171 void vcpu_set_mp_state(struct kvm_vm *vm, uint32_t vcpuid,
172 struct kvm_mp_state *mp_state);
173 struct kvm_reg_list *vcpu_get_reg_list(struct kvm_vm *vm, uint32_t vcpuid);
174 void vcpu_regs_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
175 void vcpu_regs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
181 * vm - Virtual Machine
183 * num - number of arguments
184 * ... - arguments, each of type uint64_t
190 * Sets the first @num function input registers of the VCPU with @vcpuid,
191 * per the C calling convention of the architecture, to the values given
192 * as variable args. Each of the variable args is expected to be of type
193 * uint64_t. The maximum @num can be is specific to the architecture.
195 void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...);
197 void vcpu_sregs_get(struct kvm_vm *vm, uint32_t vcpuid,
198 struct kvm_sregs *sregs);
199 void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
200 struct kvm_sregs *sregs);
201 int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
202 struct kvm_sregs *sregs);
203 void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid,
204 struct kvm_fpu *fpu);
205 void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid,
206 struct kvm_fpu *fpu);
207 void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
208 void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
209 #ifdef __KVM_HAVE_VCPU_EVENTS
210 void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid,
211 struct kvm_vcpu_events *events);
212 void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid,
213 struct kvm_vcpu_events *events);
216 void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid,
217 struct kvm_nested_state *state);
218 int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
219 struct kvm_nested_state *state, bool ignore_error);
221 void *vcpu_map_dirty_ring(struct kvm_vm *vm, uint32_t vcpuid);
223 const char *exit_reason_str(unsigned int exit_reason);
225 void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot);
228 * VM Virtual Page Map
231 * vm - Virtual Machine
232 * vaddr - VM Virtual Address
233 * paddr - VM Physical Address
234 * memslot - Memory region slot for new virtual translation tables
240 * Within @vm, creates a virtual translation for the page starting
241 * at @vaddr to the page starting at @paddr.
243 void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
246 vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
248 vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
249 vm_paddr_t paddr_min, uint32_t memslot);
252 * Create a VM with reasonable defaults
255 * vcpuid - The id of the single VCPU to add to the VM.
256 * extra_mem_pages - The number of extra pages to add (this will
257 * decide how much extra space we will need to
258 * setup the page tables using memslot 0)
259 * guest_code - The vCPU's entry point
264 * Pointer to opaque structure that describes the created VM.
266 struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
269 /* Same as vm_create_default, but can be used for more than one vcpu */
270 struct kvm_vm *vm_create_default_with_vcpus(uint32_t nr_vcpus, uint64_t extra_mem_pages,
271 uint32_t num_percpu_pages, void *guest_code,
274 /* Like vm_create_default_with_vcpus, but accepts mode as a parameter */
275 struct kvm_vm *vm_create_with_vcpus(enum vm_guest_mode mode, uint32_t nr_vcpus,
276 uint64_t extra_mem_pages, uint32_t num_percpu_pages,
277 void *guest_code, uint32_t vcpuids[]);
280 * Adds a vCPU with reasonable defaults (e.g. a stack)
283 * vm - Virtual Machine
284 * vcpuid - The id of the VCPU to add to the VM.
285 * guest_code - The vCPU's entry point
287 void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
289 bool vm_is_unrestricted_guest(struct kvm_vm *vm);
291 unsigned int vm_get_page_size(struct kvm_vm *vm);
292 unsigned int vm_get_page_shift(struct kvm_vm *vm);
293 unsigned int vm_get_max_gfn(struct kvm_vm *vm);
294 int vm_get_fd(struct kvm_vm *vm);
296 unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size);
297 unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned int num_guest_pages);
298 unsigned int vm_num_guest_pages(enum vm_guest_mode mode, unsigned int num_host_pages);
299 static inline unsigned int
300 vm_adjust_num_guest_pages(enum vm_guest_mode mode, unsigned int num_guest_pages)
303 n = vm_num_guest_pages(mode, vm_num_host_pages(mode, num_guest_pages));
305 /* s390 requires 1M aligned guest sizes */
306 n = (n + 255) & ~255;
311 struct kvm_userspace_memory_region *
312 kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
315 struct kvm_dirty_log *
316 allocate_kvm_dirty_log(struct kvm_userspace_memory_region *region);
318 int vm_create_device(struct kvm_vm *vm, struct kvm_create_device *cd);
320 #define sync_global_to_guest(vm, g) ({ \
321 typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g)); \
322 memcpy(_p, &(g), sizeof(g)); \
325 #define sync_global_from_guest(vm, g) ({ \
326 typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g)); \
327 memcpy(&(g), _p, sizeof(g)); \
330 void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid);
340 #define UCALL_MAX_ARGS 6
344 uint64_t args[UCALL_MAX_ARGS];
347 void ucall_init(struct kvm_vm *vm, void *arg);
348 void ucall_uninit(struct kvm_vm *vm);
349 void ucall(uint64_t cmd, int nargs, ...);
350 uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc);
352 #define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \
353 ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
354 #define GUEST_SYNC(stage) ucall(UCALL_SYNC, 2, "hello", stage)
355 #define GUEST_DONE() ucall(UCALL_DONE, 0)
356 #define __GUEST_ASSERT(_condition, _nargs, _args...) do { \
358 ucall(UCALL_ABORT, 2 + _nargs, \
359 "Failed guest assert: " \
360 #_condition, __LINE__, _args); \
363 #define GUEST_ASSERT(_condition) \
364 __GUEST_ASSERT((_condition), 0, 0)
366 #define GUEST_ASSERT_1(_condition, arg1) \
367 __GUEST_ASSERT((_condition), 1, (arg1))
369 #define GUEST_ASSERT_2(_condition, arg1, arg2) \
370 __GUEST_ASSERT((_condition), 2, (arg1), (arg2))
372 #define GUEST_ASSERT_3(_condition, arg1, arg2, arg3) \
373 __GUEST_ASSERT((_condition), 3, (arg1), (arg2), (arg3))
375 #define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \
376 __GUEST_ASSERT((_condition), 4, (arg1), (arg2), (arg3), (arg4))
378 #endif /* SELFTEST_KVM_UTIL_H */