target/arm/monitor.c

   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 "kvm_arm.h"
  25 #include "qapi/qapi-commands-misc-target.h"
  26
  27 static GICCapability *gic_cap_new(int version)
  28 {
  29     GICCapability *cap = g_new0(GICCapability, 1);
  30     cap->version = version;
  31     /* by default, support none */
  32     cap->emulated = false;
  33     cap->kernel = false;
  34     return cap;
  35 }
  36
  37 static GICCapabilityList *gic_cap_list_add(GICCapabilityList *head,
  38                                            GICCapability *cap)
  39 {
  40     GICCapabilityList *item = g_new0(GICCapabilityList, 1);
  41     item->value = cap;
  42     item->next = head;
  43     return item;
  44 }
  45
  46 static inline void gic_cap_kvm_probe(GICCapability *v2, GICCapability *v3)
  47 {
  48 #ifdef CONFIG_KVM
  49     int fdarray[3];
  50
  51     if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
  52         return;
  53     }
  54
  55     /* Test KVM GICv2 */
  56     if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
  57         v2->kernel = true;
  58     }
  59
  60     /* Test KVM GICv3 */
  61     if (kvm_device_supported(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
  62         v3->kernel = true;
  63     }
  64
  65     kvm_arm_destroy_scratch_host_vcpu(fdarray);
  66 #endif
  67 }
  68
  69 GICCapabilityList *qmp_query_gic_capabilities(Error **errp)
  70 {
  71     GICCapabilityList *head = NULL;
  72     GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
  73
  74     v2->emulated = true;
  75     v3->emulated = true;
  76
  77     gic_cap_kvm_probe(v2, v3);
  78
  79     head = gic_cap_list_add(head, v2);
  80     head = gic_cap_list_add(head, v3);
  81
  82     return head;
  83 }