1 /*
2 * QEMU monitor.c for ARM.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23 #include "qemu/osdep.h"
24 #include "hw/boards.h"
25 #include "kvm_arm.h"
26 #include "qapi/qapi-commands-misc.h"
27
gic_cap_new(int version)28 static GICCapability *gic_cap_new(int version)
29 {
30 GICCapability *cap = g_new0(GICCapability, 1);
31 cap->version = version;
32 /* by default, support none */
33 cap->emulated = false;
34 cap->kernel = false;
35 return cap;
36 }
37
gic_cap_list_add(GICCapabilityList * head,GICCapability * cap)38 static GICCapabilityList *gic_cap_list_add(GICCapabilityList *head,
39 GICCapability *cap)
40 {
41 GICCapabilityList *item = g_new0(GICCapabilityList, 1);
42 item->value = cap;
43 item->next = head;
44 return item;
45 }
46
gic_cap_kvm_probe(GICCapability * v2,GICCapability * v3)47 static inline void gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
48 {
49 #ifdef CONFIG_KVM
50 int fdarray[3];
51
52 if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
53 return;
54 }
55
56 /* Test KVM GICv2 */
57 if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
58 v2->kernel = true;
59 }
60
61 /* Test KVM GICv3 */
62 if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
63 v3->kernel = true;
64 }
65
66 kvm_arm_destroy_scratch_host_vcpu(fdarray);
67 #endif
68 }
69
qmp_query_gic_capabilities(Error ** errp)70 GICCapabilityList *qmp_query_gic_capabilities(Error **errp)
71 {
72 GICCapabilityList *head = NULL;
73 GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
74
75 v2->emulated = true;
76 v3->emulated = true;
77
78 gic_cap_kvm_probe(v2, v3);
79
80 head = gic_cap_list_add(head, v2);
81 head = gic_cap_list_add(head, v3);
82
83 return head;
84 }
85