LXR qemu/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 "hw/boards.h"
  25#include "kvm_arm.h"
  26#include "qapi/qapi-commands-misc-target.h"
  27
  28static 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
  38static 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
  47static 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
  70GICCapabilityList *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