1 /* 2 * ARM Generic Interrupt Controller using KVM in-kernel support 3 * 4 * Copyright (c) 2015 Samsung Electronics Co., Ltd. 5 * Written by Pavel Fedin 6 * Based on vGICv2 code by Peter Maydell 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation, either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, see <http://www.gnu.org/licenses/>. 20 */ 21 22 #include "qemu/osdep.h" 23 #include "qapi/error.h" 24 #include "hw/intc/arm_gicv3_common.h" 25 #include "hw/sysbus.h" 26 #include "sysemu/kvm.h" 27 #include "kvm_arm.h" 28 #include "vgic_common.h" 29 30 #ifdef DEBUG_GICV3_KVM 31 #define DPRINTF(fmt, ...) \ 32 do { fprintf(stderr, "kvm_gicv3: " fmt, ## __VA_ARGS__); } while (0) 33 #else 34 #define DPRINTF(fmt, ...) \ 35 do { } while (0) 36 #endif 37 38 #define TYPE_KVM_ARM_GICV3 "kvm-arm-gicv3" 39 #define KVM_ARM_GICV3(obj) \ 40 OBJECT_CHECK(GICv3State, (obj), TYPE_KVM_ARM_GICV3) 41 #define KVM_ARM_GICV3_CLASS(klass) \ 42 OBJECT_CLASS_CHECK(KVMARMGICv3Class, (klass), TYPE_KVM_ARM_GICV3) 43 #define KVM_ARM_GICV3_GET_CLASS(obj) \ 44 OBJECT_GET_CLASS(KVMARMGICv3Class, (obj), TYPE_KVM_ARM_GICV3) 45 46 typedef struct KVMARMGICv3Class { 47 ARMGICv3CommonClass parent_class; 48 DeviceRealize parent_realize; 49 void (*parent_reset)(DeviceState *dev); 50 } KVMARMGICv3Class; 51 52 static void kvm_arm_gicv3_set_irq(void *opaque, int irq, int level) 53 { 54 GICv3State *s = (GICv3State *)opaque; 55 56 kvm_arm_gic_set_irq(s->num_irq, irq, level); 57 } 58 59 static void kvm_arm_gicv3_put(GICv3State *s) 60 { 61 /* TODO */ 62 DPRINTF("Cannot put kernel gic state, no kernel interface\n"); 63 } 64 65 static void kvm_arm_gicv3_get(GICv3State *s) 66 { 67 /* TODO */ 68 DPRINTF("Cannot get kernel gic state, no kernel interface\n"); 69 } 70 71 static void kvm_arm_gicv3_reset(DeviceState *dev) 72 { 73 GICv3State *s = ARM_GICV3_COMMON(dev); 74 KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); 75 76 DPRINTF("Reset\n"); 77 78 kgc->parent_reset(dev); 79 kvm_arm_gicv3_put(s); 80 } 81 82 static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp) 83 { 84 GICv3State *s = KVM_ARM_GICV3(dev); 85 KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s); 86 Error *local_err = NULL; 87 88 DPRINTF("kvm_arm_gicv3_realize\n"); 89 90 kgc->parent_realize(dev, &local_err); 91 if (local_err) { 92 error_propagate(errp, local_err); 93 return; 94 } 95 96 if (s->security_extn) { 97 error_setg(errp, "the in-kernel VGICv3 does not implement the " 98 "security extensions"); 99 return; 100 } 101 102 gicv3_init_irqs_and_mmio(s, kvm_arm_gicv3_set_irq, NULL); 103 104 /* Try to create the device via the device control API */ 105 s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_V3, false); 106 if (s->dev_fd < 0) { 107 error_setg_errno(errp, -s->dev_fd, "error creating in-kernel VGIC"); 108 return; 109 } 110 111 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_NR_IRQS, 112 0, &s->num_irq, true); 113 114 /* Tell the kernel to complete VGIC initialization now */ 115 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, 116 KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true); 117 118 kvm_arm_register_device(&s->iomem_dist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, 119 KVM_VGIC_V3_ADDR_TYPE_DIST, s->dev_fd); 120 kvm_arm_register_device(&s->iomem_redist, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, 121 KVM_VGIC_V3_ADDR_TYPE_REDIST, s->dev_fd); 122 } 123 124 static void kvm_arm_gicv3_class_init(ObjectClass *klass, void *data) 125 { 126 DeviceClass *dc = DEVICE_CLASS(klass); 127 ARMGICv3CommonClass *agcc = ARM_GICV3_COMMON_CLASS(klass); 128 KVMARMGICv3Class *kgc = KVM_ARM_GICV3_CLASS(klass); 129 130 agcc->pre_save = kvm_arm_gicv3_get; 131 agcc->post_load = kvm_arm_gicv3_put; 132 kgc->parent_realize = dc->realize; 133 kgc->parent_reset = dc->reset; 134 dc->realize = kvm_arm_gicv3_realize; 135 dc->reset = kvm_arm_gicv3_reset; 136 } 137 138 static const TypeInfo kvm_arm_gicv3_info = { 139 .name = TYPE_KVM_ARM_GICV3, 140 .parent = TYPE_ARM_GICV3_COMMON, 141 .instance_size = sizeof(GICv3State), 142 .class_init = kvm_arm_gicv3_class_init, 143 .class_size = sizeof(KVMARMGICv3Class), 144 }; 145 146 static void kvm_arm_gicv3_register_types(void) 147 { 148 type_register_static(&kvm_arm_gicv3_info); 149 } 150 151 type_init(kvm_arm_gicv3_register_types) 152