1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * tools/testing/selftests/kvm/include/kvm_util.h 4 * 5 * Copyright (C) 2018, Google LLC. 6 */ 7 #ifndef SELFTEST_KVM_UTIL_H 8 #define SELFTEST_KVM_UTIL_H 9 10 #include "test_util.h" 11 12 #include "asm/kvm.h" 13 #include "linux/list.h" 14 #include "linux/kvm.h" 15 #include <sys/ioctl.h> 16 17 #include "sparsebit.h" 18 19 20 /* 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. 23 */ 24 struct kvm_vm; 25 26 typedef uint64_t vm_paddr_t; /* Virtual Machine (Guest) physical address */ 27 typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */ 28 29 /* Minimum allocated guest virtual and physical addresses */ 30 #define KVM_UTIL_MIN_VADDR 0x2000 31 32 #define DEFAULT_GUEST_PHY_PAGES 512 33 #define DEFAULT_GUEST_STACK_VADDR_MIN 0xab6000 34 #define DEFAULT_STACK_PGS 5 35 36 enum vm_guest_mode { 37 VM_MODE_P52V48_4K, 38 VM_MODE_P52V48_64K, 39 VM_MODE_P48V48_4K, 40 VM_MODE_P48V48_64K, 41 VM_MODE_P40V48_4K, 42 VM_MODE_P40V48_64K, 43 VM_MODE_PXXV48_4K, /* For 48bits VA but ANY bits PA */ 44 NUM_VM_MODES, 45 }; 46 47 #if defined(__aarch64__) 48 #define VM_MODE_DEFAULT VM_MODE_P40V48_4K 49 #elif defined(__x86_64__) 50 #define VM_MODE_DEFAULT VM_MODE_PXXV48_4K 51 #else 52 #define VM_MODE_DEFAULT VM_MODE_P52V48_4K 53 #endif 54 55 #define vm_guest_mode_string(m) vm_guest_mode_string[m] 56 extern const char * const vm_guest_mode_string[]; 57 58 enum vm_mem_backing_src_type { 59 VM_MEM_SRC_ANONYMOUS, 60 VM_MEM_SRC_ANONYMOUS_THP, 61 VM_MEM_SRC_ANONYMOUS_HUGETLB, 62 }; 63 64 int kvm_check_cap(long cap); 65 int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap); 66 int vcpu_enable_cap(struct kvm_vm *vm, uint32_t vcpu_id, 67 struct kvm_enable_cap *cap); 68 void vm_enable_dirty_ring(struct kvm_vm *vm, uint32_t ring_size); 69 70 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm); 71 void kvm_vm_free(struct kvm_vm *vmp); 72 void kvm_vm_restart(struct kvm_vm *vmp, int perm); 73 void kvm_vm_release(struct kvm_vm *vmp); 74 void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log); 75 void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log, 76 uint64_t first_page, uint32_t num_pages); 77 78 int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva, 79 size_t len); 80 81 void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename, 82 uint32_t data_memslot, uint32_t pgd_memslot); 83 84 void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent); 85 86 /* 87 * VM VCPU Dump 88 * 89 * Input Args: 90 * stream - Output FILE stream 91 * vm - Virtual Machine 92 * vcpuid - VCPU ID 93 * indent - Left margin indent amount 94 * 95 * Output Args: None 96 * 97 * Return: None 98 * 99 * Dumps the current state of the VCPU specified by @vcpuid, within the VM 100 * given by @vm, to the FILE stream given by @stream. 101 */ 102 void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid, 103 uint8_t indent); 104 105 void vm_create_irqchip(struct kvm_vm *vm); 106 107 void vm_userspace_mem_region_add(struct kvm_vm *vm, 108 enum vm_mem_backing_src_type src_type, 109 uint64_t guest_paddr, uint32_t slot, uint64_t npages, 110 uint32_t flags); 111 112 void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl, 113 void *arg); 114 int _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl, 115 void *arg); 116 void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg); 117 void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags); 118 void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa); 119 void vm_mem_region_delete(struct kvm_vm *vm, uint32_t slot); 120 void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid); 121 vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, 122 uint32_t data_memslot, uint32_t pgd_memslot); 123 void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, 124 unsigned int npages, uint32_t pgd_memslot); 125 void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa); 126 void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva); 127 vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva); 128 129 /* 130 * Address Guest Virtual to Guest Physical 131 * 132 * Input Args: 133 * vm - Virtual Machine 134 * gva - VM virtual address 135 * 136 * Output Args: None 137 * 138 * Return: 139 * Equivalent VM physical address 140 * 141 * Returns the VM physical address of the translated VM virtual 142 * address given by @gva. 143 */ 144 vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva); 145 146 struct kvm_run *vcpu_state(struct kvm_vm *vm, uint32_t vcpuid); 147 void vcpu_run(struct kvm_vm *vm, uint32_t vcpuid); 148 int _vcpu_run(struct kvm_vm *vm, uint32_t vcpuid); 149 void vcpu_run_complete_io(struct kvm_vm *vm, uint32_t vcpuid); 150 void vcpu_set_guest_debug(struct kvm_vm *vm, uint32_t vcpuid, 151 struct kvm_guest_debug *debug); 152 void vcpu_set_mp_state(struct kvm_vm *vm, uint32_t vcpuid, 153 struct kvm_mp_state *mp_state); 154 struct kvm_reg_list *vcpu_get_reg_list(struct kvm_vm *vm, uint32_t vcpuid); 155 void vcpu_regs_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs); 156 void vcpu_regs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs); 157 158 /* 159 * VM VCPU Args Set 160 * 161 * Input Args: 162 * vm - Virtual Machine 163 * vcpuid - VCPU ID 164 * num - number of arguments 165 * ... - arguments, each of type uint64_t 166 * 167 * Output Args: None 168 * 169 * Return: None 170 * 171 * Sets the first @num function input registers of the VCPU with @vcpuid, 172 * per the C calling convention of the architecture, to the values given 173 * as variable args. Each of the variable args is expected to be of type 174 * uint64_t. The maximum @num can be is specific to the architecture. 175 */ 176 void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...); 177 178 void vcpu_sregs_get(struct kvm_vm *vm, uint32_t vcpuid, 179 struct kvm_sregs *sregs); 180 void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, 181 struct kvm_sregs *sregs); 182 int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid, 183 struct kvm_sregs *sregs); 184 void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid, 185 struct kvm_fpu *fpu); 186 void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid, 187 struct kvm_fpu *fpu); 188 void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg); 189 void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg); 190 #ifdef __KVM_HAVE_VCPU_EVENTS 191 void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid, 192 struct kvm_vcpu_events *events); 193 void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid, 194 struct kvm_vcpu_events *events); 195 #endif 196 #ifdef __x86_64__ 197 void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid, 198 struct kvm_nested_state *state); 199 int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid, 200 struct kvm_nested_state *state, bool ignore_error); 201 #endif 202 203 const char *exit_reason_str(unsigned int exit_reason); 204 205 void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot); 206 207 /* 208 * VM Virtual Page Map 209 * 210 * Input Args: 211 * vm - Virtual Machine 212 * vaddr - VM Virtual Address 213 * paddr - VM Physical Address 214 * memslot - Memory region slot for new virtual translation tables 215 * 216 * Output Args: None 217 * 218 * Return: None 219 * 220 * Within @vm, creates a virtual translation for the page starting 221 * at @vaddr to the page starting at @paddr. 222 */ 223 void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, 224 uint32_t memslot); 225 226 vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min, 227 uint32_t memslot); 228 vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num, 229 vm_paddr_t paddr_min, uint32_t memslot); 230 231 /* 232 * Create a VM with reasonable defaults 233 * 234 * Input Args: 235 * vcpuid - The id of the single VCPU to add to the VM. 236 * extra_mem_pages - The number of extra pages to add (this will 237 * decide how much extra space we will need to 238 * setup the page tables using memslot 0) 239 * guest_code - The vCPU's entry point 240 * 241 * Output Args: None 242 * 243 * Return: 244 * Pointer to opaque structure that describes the created VM. 245 */ 246 struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages, 247 void *guest_code); 248 249 /* 250 * Adds a vCPU with reasonable defaults (e.g. a stack) 251 * 252 * Input Args: 253 * vm - Virtual Machine 254 * vcpuid - The id of the VCPU to add to the VM. 255 * guest_code - The vCPU's entry point 256 */ 257 void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code); 258 259 bool vm_is_unrestricted_guest(struct kvm_vm *vm); 260 261 unsigned int vm_get_page_size(struct kvm_vm *vm); 262 unsigned int vm_get_page_shift(struct kvm_vm *vm); 263 unsigned int vm_get_max_gfn(struct kvm_vm *vm); 264 int vm_get_fd(struct kvm_vm *vm); 265 266 unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size); 267 unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned int num_guest_pages); 268 unsigned int vm_num_guest_pages(enum vm_guest_mode mode, unsigned int num_host_pages); 269 static inline unsigned int 270 vm_adjust_num_guest_pages(enum vm_guest_mode mode, unsigned int num_guest_pages) 271 { 272 unsigned int n; 273 n = vm_num_guest_pages(mode, vm_num_host_pages(mode, num_guest_pages)); 274 #ifdef __s390x__ 275 /* s390 requires 1M aligned guest sizes */ 276 n = (n + 255) & ~255; 277 #endif 278 return n; 279 } 280 281 struct kvm_userspace_memory_region * 282 kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start, 283 uint64_t end); 284 285 struct kvm_dirty_log * 286 allocate_kvm_dirty_log(struct kvm_userspace_memory_region *region); 287 288 int vm_create_device(struct kvm_vm *vm, struct kvm_create_device *cd); 289 290 #define sync_global_to_guest(vm, g) ({ \ 291 typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g)); \ 292 memcpy(_p, &(g), sizeof(g)); \ 293 }) 294 295 #define sync_global_from_guest(vm, g) ({ \ 296 typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g)); \ 297 memcpy(&(g), _p, sizeof(g)); \ 298 }) 299 300 void assert_on_unhandled_exception(struct kvm_vm *vm, uint32_t vcpuid); 301 302 /* Common ucalls */ 303 enum { 304 UCALL_NONE, 305 UCALL_SYNC, 306 UCALL_ABORT, 307 UCALL_DONE, 308 }; 309 310 #define UCALL_MAX_ARGS 6 311 312 struct ucall { 313 uint64_t cmd; 314 uint64_t args[UCALL_MAX_ARGS]; 315 }; 316 317 void ucall_init(struct kvm_vm *vm, void *arg); 318 void ucall_uninit(struct kvm_vm *vm); 319 void ucall(uint64_t cmd, int nargs, ...); 320 uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc); 321 322 #define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \ 323 ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4) 324 #define GUEST_SYNC(stage) ucall(UCALL_SYNC, 2, "hello", stage) 325 #define GUEST_DONE() ucall(UCALL_DONE, 0) 326 #define __GUEST_ASSERT(_condition, _nargs, _args...) do { \ 327 if (!(_condition)) \ 328 ucall(UCALL_ABORT, 2 + _nargs, \ 329 "Failed guest assert: " \ 330 #_condition, __LINE__, _args); \ 331 } while (0) 332 333 #define GUEST_ASSERT(_condition) \ 334 __GUEST_ASSERT((_condition), 0, 0) 335 336 #define GUEST_ASSERT_1(_condition, arg1) \ 337 __GUEST_ASSERT((_condition), 1, (arg1)) 338 339 #define GUEST_ASSERT_2(_condition, arg1, arg2) \ 340 __GUEST_ASSERT((_condition), 2, (arg1), (arg2)) 341 342 #define GUEST_ASSERT_3(_condition, arg1, arg2, arg3) \ 343 __GUEST_ASSERT((_condition), 3, (arg1), (arg2), (arg3)) 344 345 #define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \ 346 __GUEST_ASSERT((_condition), 4, (arg1), (arg2), (arg3), (arg4)) 347 348 #endif /* SELFTEST_KVM_UTIL_H */ 349