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 .features = ARM_VCPU_FEATURE_FLAGS(kvm, cpu_id) 38 }; 39 40 vcpu = calloc(1, sizeof(struct kvm_cpu)); 41 if (!vcpu) 42 return NULL; 43 44 vcpu->vcpu_fd = ioctl(kvm->vm_fd, KVM_CREATE_VCPU, cpu_id); 45 if (vcpu->vcpu_fd < 0) 46 die_perror("KVM_CREATE_VCPU ioctl"); 47 48 mmap_size = ioctl(kvm->sys_fd, KVM_GET_VCPU_MMAP_SIZE, 0); 49 if (mmap_size < 0) 50 die_perror("KVM_GET_VCPU_MMAP_SIZE ioctl"); 51 52 vcpu->kvm_run = mmap(NULL, mmap_size, PROT_RW, MAP_SHARED, 53 vcpu->vcpu_fd, 0); 54 if (vcpu->kvm_run == MAP_FAILED) 55 die("unable to mmap vcpu fd"); 56 57 /* Find an appropriate target CPU type. */ 58 for (i = 0; i < ARRAY_SIZE(kvm_arm_targets); ++i) { 59 vcpu_init.target = kvm_arm_targets[i]->id; 60 err = ioctl(vcpu->vcpu_fd, KVM_ARM_VCPU_INIT, &vcpu_init); 61 if (!err) 62 break; 63 } 64 65 if (err || kvm_arm_targets[i]->init(vcpu)) 66 die("Unable to initialise ARM vcpu"); 67 68 coalesced_offset = ioctl(kvm->sys_fd, KVM_CHECK_EXTENSION, 69 KVM_CAP_COALESCED_MMIO); 70 if (coalesced_offset) 71 vcpu->ring = (void *)vcpu->kvm_run + 72 (coalesced_offset * PAGE_SIZE); 73 74 /* Populate the vcpu structure. */ 75 vcpu->kvm = kvm; 76 vcpu->cpu_id = cpu_id; 77 vcpu->cpu_type = vcpu_init.target; 78 vcpu->is_running = true; 79 return vcpu; 80 } 81 82 void kvm_cpu__arch_nmi(struct kvm_cpu *cpu) 83 { 84 } 85 86 void kvm_cpu__delete(struct kvm_cpu *vcpu) 87 { 88 free(vcpu); 89 } 90 91 bool kvm_cpu__handle_exit(struct kvm_cpu *vcpu) 92 { 93 return false; 94 } 95 96 bool kvm_cpu__emulate_mmio(struct kvm *kvm, u64 phys_addr, u8 *data, u32 len, 97 u8 is_write) 98 { 99 if (arm_addr_in_virtio_mmio_region(phys_addr)) 100 return kvm__emulate_mmio(kvm, phys_addr, data, len, is_write); 101 else if (arm_addr_in_pci_mmio_region(phys_addr)) 102 die("PCI emulation not supported on ARM!"); 103 104 return false; 105 } 106 107 void kvm_cpu__show_page_tables(struct kvm_cpu *vcpu) 108 { 109 } 110