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

   1 /*
   2  * tools/testing/selftests/kvm/include/kvm_util.h
   3  *
   4  * Copyright (C) 2018, Google LLC.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2.
   7  *
   8  */
   9 #ifndef SELFTEST_KVM_UTIL_H
  10 #define SELFTEST_KVM_UTIL_H
  11
  12 #include "test_util.h"
  13
  14 #include "asm/kvm.h"
  15 #include "linux/kvm.h"
  16 #include <sys/ioctl.h>
  17
  18 #include "sparsebit.h"
  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         NUM_VM_MODES,
  44 };
  45
  46 #define vm_guest_mode_string(m) vm_guest_mode_string[m]
  47 extern const char * const vm_guest_mode_string[];
  48
  49 enum vm_mem_backing_src_type {
  50         VM_MEM_SRC_ANONYMOUS,
  51         VM_MEM_SRC_ANONYMOUS_THP,
  52         VM_MEM_SRC_ANONYMOUS_HUGETLB,
  53 };
  54
  55 int kvm_check_cap(long cap);
  56 int vm_enable_cap(struct kvm_vm *vm, struct kvm_enable_cap *cap);
  57
  58 struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm);
  59 struct kvm_vm *_vm_create(enum vm_guest_mode mode, uint64_t phy_pages,
  60                           int perm, unsigned long type);
  61 void kvm_vm_free(struct kvm_vm *vmp);
  62 void kvm_vm_restart(struct kvm_vm *vmp, int perm);
  63 void kvm_vm_release(struct kvm_vm *vmp);
  64 void kvm_vm_get_dirty_log(struct kvm_vm *vm, int slot, void *log);
  65 void kvm_vm_clear_dirty_log(struct kvm_vm *vm, int slot, void *log,
  66                             uint64_t first_page, uint32_t num_pages);
  67
  68 int kvm_memcmp_hva_gva(void *hva, struct kvm_vm *vm, const vm_vaddr_t gva,
  69                        size_t len);
  70
  71 void kvm_vm_elf_load(struct kvm_vm *vm, const char *filename,
  72                      uint32_t data_memslot, uint32_t pgd_memslot);
  73
  74 void vm_dump(FILE *stream, struct kvm_vm *vm, uint8_t indent);
  75 void vcpu_dump(FILE *stream, struct kvm_vm *vm, uint32_t vcpuid,
  76                uint8_t indent);
  77
  78 void vm_create_irqchip(struct kvm_vm *vm);
  79
  80 void vm_userspace_mem_region_add(struct kvm_vm *vm,
  81         enum vm_mem_backing_src_type src_type,
  82         uint64_t guest_paddr, uint32_t slot, uint64_t npages,
  83         uint32_t flags);
  84
  85 void vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
  86                 void *arg);
  87 int _vcpu_ioctl(struct kvm_vm *vm, uint32_t vcpuid, unsigned long ioctl,
  88                 void *arg);
  89 void vm_ioctl(struct kvm_vm *vm, unsigned long ioctl, void *arg);
  90 void vm_mem_region_set_flags(struct kvm_vm *vm, uint32_t slot, uint32_t flags);
  91 void vm_vcpu_add(struct kvm_vm *vm, uint32_t vcpuid, int pgd_memslot,
  92                  int gdt_memslot);
  93 vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min,
  94                           uint32_t data_memslot, uint32_t pgd_memslot);
  95 void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
  96               size_t size, uint32_t pgd_memslot);
  97 void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa);
  98 void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva);
  99 vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva);
 100 vm_paddr_t addr_gva2gpa(struct kvm_vm *vm, vm_vaddr_t gva);
 101
 102 struct kvm_run *vcpu_state(struct kvm_vm *vm, uint32_t vcpuid);
 103 void vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
 104 int _vcpu_run(struct kvm_vm *vm, uint32_t vcpuid);
 105 void vcpu_set_mp_state(struct kvm_vm *vm, uint32_t vcpuid,
 106                        struct kvm_mp_state *mp_state);
 107 void vcpu_regs_get(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
 108 void vcpu_regs_set(struct kvm_vm *vm, uint32_t vcpuid, struct kvm_regs *regs);
 109 void vcpu_args_set(struct kvm_vm *vm, uint32_t vcpuid, unsigned int num, ...);
 110 void vcpu_sregs_get(struct kvm_vm *vm, uint32_t vcpuid,
 111                     struct kvm_sregs *sregs);
 112 void vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
 113                     struct kvm_sregs *sregs);
 114 int _vcpu_sregs_set(struct kvm_vm *vm, uint32_t vcpuid,
 115                     struct kvm_sregs *sregs);
 116 void vcpu_events_get(struct kvm_vm *vm, uint32_t vcpuid,
 117                      struct kvm_vcpu_events *events);
 118 void vcpu_events_set(struct kvm_vm *vm, uint32_t vcpuid,
 119                      struct kvm_vcpu_events *events);
 120
 121 const char *exit_reason_str(unsigned int exit_reason);
 122
 123 void virt_pgd_alloc(struct kvm_vm *vm, uint32_t pgd_memslot);
 124 void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr,
 125                  uint32_t pgd_memslot);
 126 vm_paddr_t vm_phy_page_alloc(struct kvm_vm *vm, vm_paddr_t paddr_min,
 127                              uint32_t memslot);
 128 vm_paddr_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t num,
 129                               vm_paddr_t paddr_min, uint32_t memslot);
 130
 131 struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_size,
 132                                  void *guest_code);
 133 void vm_vcpu_add_default(struct kvm_vm *vm, uint32_t vcpuid, void *guest_code);
 134
 135 struct kvm_userspace_memory_region *
 136 kvm_userspace_memory_region_find(struct kvm_vm *vm, uint64_t start,
 137                                  uint64_t end);
 138
 139 struct kvm_dirty_log *
 140 allocate_kvm_dirty_log(struct kvm_userspace_memory_region *region);
 141
 142 int vm_create_device(struct kvm_vm *vm, struct kvm_create_device *cd);
 143
 144 #define sync_global_to_guest(vm, g) ({                          \
 145         typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g));     \
 146         memcpy(_p, &(g), sizeof(g));                            \
 147 })
 148
 149 #define sync_global_from_guest(vm, g) ({                        \
 150         typeof(g) *_p = addr_gva2hva(vm, (vm_vaddr_t)&(g));     \
 151         memcpy(&(g), _p, sizeof(g));                            \
 152 })
 153
 154 /* ucall implementation types */
 155 typedef enum {
 156         UCALL_PIO,
 157         UCALL_MMIO,
 158 } ucall_type_t;
 159
 160 /* Common ucalls */
 161 enum {
 162         UCALL_NONE,
 163         UCALL_SYNC,
 164         UCALL_ABORT,
 165         UCALL_DONE,
 166 };
 167
 168 #define UCALL_MAX_ARGS 6
 169
 170 struct ucall {
 171         uint64_t cmd;
 172         uint64_t args[UCALL_MAX_ARGS];
 173 };
 174
 175 void ucall_init(struct kvm_vm *vm, ucall_type_t type, void *arg);
 176 void ucall_uninit(struct kvm_vm *vm);
 177 void ucall(uint64_t cmd, int nargs, ...);
 178 uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc);
 179
 180 #define GUEST_SYNC(stage)       ucall(UCALL_SYNC, 2, "hello", stage)
 181 #define GUEST_DONE()            ucall(UCALL_DONE, 0)
 182 #define GUEST_ASSERT(_condition) do {                   \
 183         if (!(_condition))                              \
 184                 ucall(UCALL_ABORT, 2,                   \
 185                         "Failed guest assert: "         \
 186                         #_condition, __LINE__);         \
 187 } while (0)
 188
 189 #endif /* SELFTEST_KVM_UTIL_H */