travis: add whitespace between each major section & matrix entry
[qemu/ar7.git] / hw / intc / arm_gicv3_its_kvm.c
blob01573abb488c207261d5c0469a76fa4b649a51ad
1 /*
2 * KVM-based ITS implementation for a GICv3-based system
4 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
5 * Written by Pavel Fedin <p.fedin@samsung.com>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
21 #include "qemu/osdep.h"
22 #include "qapi/error.h"
23 #include "hw/intc/arm_gicv3_its_common.h"
24 #include "sysemu/sysemu.h"
25 #include "sysemu/kvm.h"
26 #include "kvm_arm.h"
27 #include "migration/blocker.h"
29 #define TYPE_KVM_ARM_ITS "arm-its-kvm"
30 #define KVM_ARM_ITS(obj) OBJECT_CHECK(GICv3ITSState, (obj), TYPE_KVM_ARM_ITS)
31 #define KVM_ARM_ITS_CLASS(klass) \
32 OBJECT_CLASS_CHECK(KVMARMITSClass, (klass), TYPE_KVM_ARM_ITS)
33 #define KVM_ARM_ITS_GET_CLASS(obj) \
34 OBJECT_GET_CLASS(KVMARMITSClass, (obj), TYPE_KVM_ARM_ITS)
36 typedef struct KVMARMITSClass {
37 GICv3ITSCommonClass parent_class;
38 void (*parent_reset)(DeviceState *dev);
39 } KVMARMITSClass;
42 static int kvm_its_send_msi(GICv3ITSState *s, uint32_t value, uint16_t devid)
44 struct kvm_msi msi;
46 if (unlikely(!s->translater_gpa_known)) {
47 MemoryRegion *mr = &s->iomem_its_translation;
48 MemoryRegionSection mrs;
50 mrs = memory_region_find(mr, 0, 1);
51 memory_region_unref(mrs.mr);
52 s->gits_translater_gpa = mrs.offset_within_address_space + 0x40;
53 s->translater_gpa_known = true;
56 msi.address_lo = extract64(s->gits_translater_gpa, 0, 32);
57 msi.address_hi = extract64(s->gits_translater_gpa, 32, 32);
58 msi.data = le32_to_cpu(value);
59 msi.flags = KVM_MSI_VALID_DEVID;
60 msi.devid = devid;
61 memset(msi.pad, 0, sizeof(msi.pad));
63 return kvm_vm_ioctl(kvm_state, KVM_SIGNAL_MSI, &msi);
66 /**
67 * vm_change_state_handler - VM change state callback aiming at flushing
68 * ITS tables into guest RAM
70 * The tables get flushed to guest RAM whenever the VM gets stopped.
72 static void vm_change_state_handler(void *opaque, int running,
73 RunState state)
75 GICv3ITSState *s = (GICv3ITSState *)opaque;
76 Error *err = NULL;
78 if (running) {
79 return;
82 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
83 KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err);
84 if (err) {
85 error_report_err(err);
89 static void kvm_arm_its_realize(DeviceState *dev, Error **errp)
91 GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
92 Error *local_err = NULL;
94 s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_ITS, false);
95 if (s->dev_fd < 0) {
96 error_setg_errno(errp, -s->dev_fd, "error creating in-kernel ITS");
97 return;
100 /* explicit init of the ITS */
101 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
102 KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true, &error_abort);
104 /* register the base address */
105 kvm_arm_register_device(&s->iomem_its_cntrl, -1, KVM_DEV_ARM_VGIC_GRP_ADDR,
106 KVM_VGIC_ITS_ADDR_TYPE, s->dev_fd, 0);
108 gicv3_its_init_mmio(s, NULL);
110 if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
111 GITS_CTLR)) {
112 error_setg(&s->migration_blocker, "This operating system kernel "
113 "does not support vITS migration");
114 migrate_add_blocker(s->migration_blocker, &local_err);
115 if (local_err) {
116 error_propagate(errp, local_err);
117 error_free(s->migration_blocker);
118 return;
120 } else {
121 qemu_add_vm_change_state_handler(vm_change_state_handler, s);
124 kvm_msi_use_devid = true;
125 kvm_gsi_direct_mapping = false;
126 kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled();
130 * kvm_arm_its_pre_save - handles the saving of ITS registers.
131 * ITS tables are flushed into guest RAM separately and earlier,
132 * through the VM change state handler, since at the moment pre_save()
133 * is called, the guest RAM has already been saved.
135 static void kvm_arm_its_pre_save(GICv3ITSState *s)
137 int i;
139 for (i = 0; i < 8; i++) {
140 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
141 GITS_BASER + i * 8, &s->baser[i], false,
142 &error_abort);
145 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
146 GITS_CTLR, &s->ctlr, false, &error_abort);
148 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
149 GITS_CBASER, &s->cbaser, false, &error_abort);
151 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
152 GITS_CREADR, &s->creadr, false, &error_abort);
154 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
155 GITS_CWRITER, &s->cwriter, false, &error_abort);
157 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
158 GITS_IIDR, &s->iidr, false, &error_abort);
162 * kvm_arm_its_post_load - Restore both the ITS registers and tables
164 static void kvm_arm_its_post_load(GICv3ITSState *s)
166 int i;
168 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
169 GITS_IIDR, &s->iidr, true, &error_abort);
172 * must be written before GITS_CREADR since GITS_CBASER write
173 * access resets GITS_CREADR.
175 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
176 GITS_CBASER, &s->cbaser, true, &error_abort);
178 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
179 GITS_CREADR, &s->creadr, true, &error_abort);
181 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
182 GITS_CWRITER, &s->cwriter, true, &error_abort);
185 for (i = 0; i < 8; i++) {
186 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
187 GITS_BASER + i * 8, &s->baser[i], true,
188 &error_abort);
191 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
192 KVM_DEV_ARM_ITS_RESTORE_TABLES, NULL, true,
193 &error_abort);
195 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
196 GITS_CTLR, &s->ctlr, true, &error_abort);
199 static void kvm_arm_its_reset(DeviceState *dev)
201 GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
202 KVMARMITSClass *c = KVM_ARM_ITS_GET_CLASS(s);
203 int i;
205 c->parent_reset(dev);
207 if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
208 KVM_DEV_ARM_ITS_CTRL_RESET)) {
209 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL,
210 KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true, &error_abort);
211 return;
214 warn_report("ITS KVM: full reset is not supported by the host kernel");
216 if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
217 GITS_CTLR)) {
218 return;
221 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
222 GITS_CTLR, &s->ctlr, true, &error_abort);
224 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
225 GITS_CBASER, &s->cbaser, true, &error_abort);
227 for (i = 0; i < 8; i++) {
228 kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS,
229 GITS_BASER + i * 8, &s->baser[i], true,
230 &error_abort);
234 static Property kvm_arm_its_props[] = {
235 DEFINE_PROP_LINK("parent-gicv3", GICv3ITSState, gicv3, "kvm-arm-gicv3",
236 GICv3State *),
237 DEFINE_PROP_END_OF_LIST(),
240 static void kvm_arm_its_class_init(ObjectClass *klass, void *data)
242 DeviceClass *dc = DEVICE_CLASS(klass);
243 GICv3ITSCommonClass *icc = ARM_GICV3_ITS_COMMON_CLASS(klass);
244 KVMARMITSClass *ic = KVM_ARM_ITS_CLASS(klass);
246 dc->realize = kvm_arm_its_realize;
247 dc->props = kvm_arm_its_props;
248 device_class_set_parent_reset(dc, kvm_arm_its_reset, &ic->parent_reset);
249 icc->send_msi = kvm_its_send_msi;
250 icc->pre_save = kvm_arm_its_pre_save;
251 icc->post_load = kvm_arm_its_post_load;
254 static const TypeInfo kvm_arm_its_info = {
255 .name = TYPE_KVM_ARM_ITS,
256 .parent = TYPE_ARM_GICV3_ITS_COMMON,
257 .instance_size = sizeof(GICv3ITSState),
258 .class_init = kvm_arm_its_class_init,
259 .class_size = sizeof(KVMARMITSClass),
262 static void kvm_arm_its_register_types(void)
264 type_register_static(&kvm_arm_its_info);
267 type_init(kvm_arm_its_register_types)