1 #include "kvm/kvm.h" 2 #include "kvm/kvm-cpu.h" 3 4 static int debug_fd; 5 6 void kvm_cpu__set_debug_fd(int fd) 7 { 8 debug_fd = fd; 9 } 10 11 int kvm_cpu__get_debug_fd(void) 12 { 13 return debug_fd; 14 } 15 16 static struct kvm_arm_target *kvm_arm_targets[KVM_ARM_NUM_TARGETS]; 17 int kvm_cpu__register_kvm_arm_target(struct kvm_arm_target *target) 18 { 19 unsigned int i = 0; 20 21 for (i = 0; i < ARRAY_SIZE(kvm_arm_targets); ++i) { 22 if (!kvm_arm_targets[i]) { 23 kvm_arm_targets[i] = target; 24 return 0; 25 } 26 } 27 28 return -ENOSPC; 29 } 30 31 struct kvm_cpu *kvm_cpu__arch_init(struct kvm *kvm, unsigned long cpu_id) 32 { 33 struct kvm_cpu *vcpu; 34 int coalesced_offset, mmap_size, err = -1; 35 unsigned int i; 36 struct kvm_vcpu_init vcpu_init = { }; 37 38 vcpu = calloc(1, sizeof(struct kvm_cpu)); 39 if (!vcpu) 40 return NULL; 41 42 vcpu->vcpu_fd = ioctl(kvm->vm_fd, KVM_CREATE_VCPU, cpu_id); 43 if (vcpu->vcpu_fd < 0) 44 die_perror("KVM_CREATE_VCPU ioctl"); 45 46 mmap_size = ioctl(kvm->sys_fd, KVM_GET_VCPU_MMAP_SIZE, 0); 47 if (mmap_size < 0) 48 die_perror("KVM_GET_VCPU_MMAP_SIZE ioctl"); 49 50 vcpu->kvm_run = mmap(NULL, mmap_size, PROT_RW, MAP_SHARED, 51 vcpu->vcpu_fd, 0); 52 if (vcpu->kvm_run == MAP_FAILED) 53 die("unable to mmap vcpu fd"); 54 55 /* Find an appropriate target CPU type. */ 56 for (i = 0; i < ARRAY_SIZE(kvm_arm_targets); ++i) { 57 vcpu_init.target = kvm_arm_targets[i]->id; 58 err = ioctl(vcpu->vcpu_fd, KVM_ARM_VCPU_INIT, &vcpu_init); 59 if (!err) 60 break; 61 } 62 63 if (err || kvm_arm_targets[i]->init(vcpu)) 64 die("Unable to initialise ARM vcpu"); 65 66 coalesced_offset = ioctl(kvm->sys_fd, KVM_CHECK_EXTENSION, 67 KVM_CAP_COALESCED_MMIO); 68 if (coalesced_offset) 69 vcpu->ring = (void *)vcpu->kvm_run + 70 (coalesced_offset * PAGE_SIZE); 71 72 /* Populate the vcpu structure. */ 73 vcpu->kvm = kvm; 74 vcpu->cpu_id = cpu_id; 75 vcpu->cpu_type = vcpu_init.target; 76 vcpu->is_running = true; 77 return vcpu; 78 } 79 80 void kvm_cpu__arch_nmi(struct kvm_cpu *cpu) 81 { 82 } 83 84 void kvm_cpu__delete(struct kvm_cpu *vcpu) 85 { 86 free(vcpu); 87 } 88 89 bool kvm_cpu__handle_exit(struct kvm_cpu *vcpu) 90 { 91 return false; 92 } 93 94 bool kvm_cpu__emulate_mmio(struct kvm *kvm, u64 phys_addr, u8 *data, u32 len, 95 u8 is_write) 96 { 97 if (arm_addr_in_virtio_mmio_region(phys_addr)) 98 return kvm__emulate_mmio(kvm, phys_addr, data, len, is_write); 99 else if (arm_addr_in_pci_mmio_region(phys_addr)) 100 die("PCI emulation not supported on ARM!"); 101 102 return false; 103 } 104 105 void kvm_cpu__show_page_tables(struct kvm_cpu *vcpu) 106 { 107 } 108