tools/testing/selftests/kvm/include/kvm_util.h

   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/kvm.h"
  14 #include <sys/ioctl.h>
  15
  16 #include "sparsebit.h"
  17
  18
  19 /*
  20  * Callers of kvm_util only have an incomplete/opaque description of the
  21  * structure kvm_util is using to maintain the state of a VM.
  22  */
  23 struct kvm_vm;
  24
  25 typedef uint64_t vm_paddr_t; /* Virtual Machine (Guest) physical address */
  26 typedef uint64_t vm_vaddr_t; /* Virtual Machine (Guest) virtual address */
  27
  28 /* Minimum allocated guest virtual and physical addresses */
  29 #define KVM_UTIL_MIN_VADDR              0x2000
  30
  31 #define DEFAULT_GUEST_PHY_PAGES         512
  32 #define DEFAULT_GUEST_STACK_VADDR_MIN   0xab6000
  33 #define DEFAULT_STACK_PGS               5
  34
  35 enum vm_guest_mode {
  36         VM_MODE_P52V48_4K,
  37         VM_MODE_P52V48_64K,
  38         VM_MODE_P48V48_4K,
  39         VM_MODE_P48V48_64K,
  40         VM_MODE_P40V48_4K,
  41         VM_MODE_P40V48_64K,
  42         VM_MODE_PXXV48_4K,      /* For 48bits VA but ANY bits PA */
  43         NUM_VM_MODES,
  44 };
  45
  46 #if defined(__aarch64__)
  47 #define VM_MODE_DEFAULT VM_MODE_P40V48_4K
  48 #elif defined(__x86_64__)
  49 #define VM_MODE_DEFAULT VM_MODE_PXXV48_4K
  50 #else
  51 #define VM_MODE_DEFAULT VM_MODE_P52V48_4K
  52 #endif
  53
  54 #define vm_guest_mode_string(m) vm_guest_mode_string[m]
  55 extern const char * const vm_guest_mode_string[];
  56
  57 enum vm_mem_backing_src_type {
  58         VM_MEM_SRC_ANONYMOUS,
  59         VM_MEM_SRC_ANONYMOUS_THP,
  60         VM_MEM_SRC_ANONYMOUS_HUGETLB,
  61 };
  62
  63 int kvm_check_cap(long cap);
  64 int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
  65
  66 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
  67 struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
  68 void kvm_vm_free(struct kvm_vm *vmp);
  69 void kvm_vm_restart(struct kvm_vm *vmp, int perm);
  70 void kvm_vm_release(struct kvm_vm *vmp);
  71 void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log);
  72 void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
  73                             uint64_t first_page, uint32_t num_pages);
  74
  75 int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva,
  76                        size_t len);
  77
  78 void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename,
  79                      uint32_t data_memslot, uint32_t pgd_memslot);
  80
  81 void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent);
  82
  83 /*
  84  * VM VCPU Dump
  85  *
  86  * Input Args:
  87  *   stream - Output FILE stream
  88  *   vm     - Virtual Machine
  89  *   vcpuid - VCPU ID
  90  *   indent - Left margin indent amount
  91  *
  92  * Output Args: None
  93  *
  94  * Return: None
  95  *
  96  * Dumps the current state of the VCPU specified by @vcpuid, within the VM
  97  * given by @vm, to the FILE stream given by @stream.
  98  */
  99 void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid,
 100                uint8_t indent);
 101
 102 void vm_create_irqchip(struct kvm_vm *vm);
 103
 104 void vm_userspace_mem_region_add(struct kvm_vm *vm,
 105         enum vm_mem_backing_src_type src_type,
 106         uint64_t guest_paddr, uint32_t slot, uint64_t npages,
 107         uint32_t flags);
 108
 109 void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
 110                 void *arg);
 111 int _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
 112                 void *arg);
 113 void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
 114 void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags);
 115 void vm_mem_region_move(struct kvm_vm *vm, uint32_t slot, uint64_t new_gpa);
 116 void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid);
 117 vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
 118                           uint32_t data_memslot, uint32_t pgd_memslot);
 119 void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
 120               unsigned int npages, uint32_t pgd_memslot);
 121 void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa);
 122 void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva);
 123 vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva);
 124
 125 /*
 126  * Address Guest Virtual to Guest Physical
 127  *
 128  * Input Args:
 129  *   vm - Virtual Machine
 130  *   gva - VM virtual address
 131  *
 132  * Output Args: None
 133  *
 134  * Return:
 135  *   Equivalent VM physical address
 136  *
 137  * Returns the VM physical address of the translated VM virtual
 138  * address given by @gva.
 139  */
 140 vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva);
 141
 142 struct kvm_run *vcpu_state(struct kvm_vm *vm, uint32_t vcpuid);
 143 void vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
 144 int _vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
 145 void vcpu_run_complete_io(struct kvm_vm *vm, uint32_t vcpuid);
 146 void vcpu_set_mp_state(struct kvm_vm *vm, uint32_t vcpuid,
 147                        struct kvm_mp_state *mp_state);
 148 void vcpu_regs_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
 149 void vcpu_regs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
 150
 151 /*
 152  * VM VCPU Args Set
 153  *
 154  * Input Args:
 155  *   vm - Virtual Machine
 156  *   vcpuid - VCPU ID
 157  *   num - number of arguments
 158  *   ... - arguments, each of type uint64_t
 159  *
 160  * Output Args: None
 161  *
 162  * Return: None
 163  *
 164  * Sets the first @num function input registers of the VCPU with @vcpuid,
 165  * per the C calling convention of the architecture, to the values given
 166  * as variable args. Each of the variable args is expected to be of type
 167  * uint64_t. The maximum @num can be is specific to the architecture.
 168  */
 169 void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...);
 170
 171 void vcpu_sregs_get(struct kvm_vm *vm, uint32_t vcpuid,
 172                     struct kvm_sregs *sregs);
 173 void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
 174                     struct kvm_sregs *sregs);
 175 int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
 176                     struct kvm_sregs *sregs);
 177 void vcpu_fpu_get(struct kvm_vm *vm, uint32_t vcpuid,
 178                   struct kvm_fpu *fpu);
 179 void vcpu_fpu_set(struct kvm_vm *vm, uint32_t vcpuid,
 180                   struct kvm_fpu *fpu);
 181 void vcpu_get_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
 182 void vcpu_set_reg(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_one_reg *reg);
 183 #ifdef __KVM_HAVE_VCPU_EVENTS
 184 void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid,
 185                      struct kvm_vcpu_events *events);
 186 void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid,
 187                      struct kvm_vcpu_events *events);
 188 #endif
 189 #ifdef __x86_64__
 190 void vcpu_nested_state_get(struct kvm_vm *vm, uint32_t vcpuid,
 191                            struct kvm_nested_state *state);
 192 int vcpu_nested_state_set(struct kvm_vm *vm, uint32_t vcpuid,
 193                           struct kvm_nested_state *state, bool ignore_error);
 194 #endif
 195
 196 const char *exit_reason_str(unsigned int exit_reason);
 197
 198 void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot);
 199
 200 /*
 201  * VM Virtual Page Map
 202  *
 203  * Input Args:
 204  *   vm - Virtual Machine
 205  *   vaddr - VM Virtual Address
 206  *   paddr - VM Physical Address
 207  *   memslot - Memory region slot for new virtual translation tables
 208  *
 209  * Output Args: None
 210  *
 211  * Return: None
 212  *
 213  * Within @vm, creates a virtual translation for the page starting
 214  * at @vaddr to the page starting at @paddr.
 215  */
 216 void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
 217                  uint32_t memslot);
 218
 219 vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
 220                              uint32_t memslot);
 221 vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
 222                               vm_paddr_t paddr_min, uint32_t memslot);
 223
 224 /*
 225  * Create a VM with reasonable defaults
 226  *
 227  * Input Args:
 228  *   vcpuid - The id of the single VCPU to add to the VM.
 229  *   extra_mem_pages - The number of extra pages to add (this will
 230  *                     decide how much extra space we will need to
 231  *                     setup the page tables using memslot 0)
 232  *   guest_code - The vCPU's entry point
 233  *
 234  * Output Args: None
 235  *
 236  * Return:
 237  *   Pointer to opaque structure that describes the created VM.
 238  */
 239 struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages,
 240                                  void *guest_code);
 241
 242 /*
 243  * Adds a vCPU with reasonable defaults (e.g. a stack)
 244  *
 245  * Input Args:
 246  *   vm - Virtual Machine
 247  *   vcpuid - The id of the VCPU to add to the VM.
 248  *   guest_code - The vCPU's entry point
 249  */
 250 void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
 251
 252 bool vm_is_unrestricted_guest(struct kvm_vm *vm);
 253
 254 unsigned int vm_get_page_size(struct kvm_vm *vm);
 255 unsigned int vm_get_page_shift(struct kvm_vm *vm);
 256 unsigned int vm_get_max_gfn(struct kvm_vm *vm);
 257
 258 unsigned int vm_calc_num_guest_pages(enum vm_guest_mode mode, size_t size);
 259 unsigned int vm_num_host_pages(enum vm_guest_mode mode, unsigned int num_guest_pages);
 260 unsigned int vm_num_guest_pages(enum vm_guest_mode mode, unsigned int num_host_pages);
 261 static inline unsigned int
 262 vm_adjust_num_guest_pages(enum vm_guest_mode mode, unsigned int num_guest_pages)
 263 {
 264         unsigned int n;
 265         n = vm_num_guest_pages(mode, vm_num_host_pages(mode, num_guest_pages));
 266 #ifdef __s390x__
 267         /* s390 requires 1M aligned guest sizes */
 268         n = (n + 255) & ~255;
 269 #endif
 270         return n;
 271 }
 272
 273 struct kvm_userspace_memory_region *
 274 kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
 275                                  uint64_t end);
 276
 277 struct kvm_dirty_log *
 278 allocate_kvm_dirty_log(struct kvm_userspace_memory_region *region);
 279
 280 int vm_create_device(struct kvm_vm *vm, struct kvm_create_device *cd);
 281
 282 #define sync_global_to_guest(vm, g) ({                          \
 283         typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g));     \
 284         memcpy(_p, &(g), sizeof(g));                            \
 285 })
 286
 287 #define sync_global_from_guest(vm, g) ({                        \
 288         typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g));     \
 289         memcpy(&(g), _p, sizeof(g));                            \
 290 })
 291
 292 /* Common ucalls */
 293 enum {
 294         UCALL_NONE,
 295         UCALL_SYNC,
 296         UCALL_ABORT,
 297         UCALL_DONE,
 298 };
 299
 300 #define UCALL_MAX_ARGS 6
 301
 302 struct ucall {
 303         uint64_t cmd;
 304         uint64_t args[UCALL_MAX_ARGS];
 305 };
 306
 307 void ucall_init(struct kvm_vm *vm, void *arg);
 308 void ucall_uninit(struct kvm_vm *vm);
 309 void ucall(uint64_t cmd, int nargs, ...);
 310 uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc);
 311
 312 #define GUEST_SYNC(stage)       ucall(UCALL_SYNC, 2, "hello", stage)
 313 #define GUEST_DONE()            ucall(UCALL_DONE, 0)
 314 #define GUEST_ASSERT(_condition) do {                   \
 315         if (!(_condition))                              \
 316                 ucall(UCALL_ABORT, 2,                   \
 317                         "Failed guest assert: "         \
 318                         #_condition, __LINE__);         \
 319 } while (0)
 320
 321 #endif /* SELFTEST_KVM_UTIL_H */