virt/kvm/arm/vgic/vgic-kvm-device.c

   1 /*
   2  * VGIC: KVM DEVICE API
   3  *
   4  * Copyright (C) 2015 ARM Ltd.
   5  * Author: Marc Zyngier <marc.zyngier@arm.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  */
  16 #include <linux/kvm_host.h>
  17 #include <kvm/arm_vgic.h>
  18
  19 /* common helpers */
  20
  21 static int vgic_create(struct kvm_device *dev, u32 type)
  22 {
  23         return kvm_vgic_create(dev->kvm, type);
  24 }
  25
  26 static void vgic_destroy(struct kvm_device *dev)
  27 {
  28         kfree(dev);
  29 }
  30
  31 void kvm_register_vgic_device(unsigned long type)
  32 {
  33         switch (type) {
  34         case KVM_DEV_TYPE_ARM_VGIC_V2:
  35                 kvm_register_device_ops(&kvm_arm_vgic_v2_ops,
  36                                         KVM_DEV_TYPE_ARM_VGIC_V2);
  37                 break;
  38 #ifdef CONFIG_KVM_ARM_VGIC_V3
  39         case KVM_DEV_TYPE_ARM_VGIC_V3:
  40                 kvm_register_device_ops(&kvm_arm_vgic_v3_ops,
  41                                         KVM_DEV_TYPE_ARM_VGIC_V3);
  42                 break;
  43 #endif
  44         }
  45 }
  46
  47 /* V2 ops */
  48
  49 static int vgic_v2_set_attr(struct kvm_device *dev,
  50                             struct kvm_device_attr *attr)
  51 {
  52         return -ENXIO;
  53 }
  54
  55 static int vgic_v2_get_attr(struct kvm_device *dev,
  56                             struct kvm_device_attr *attr)
  57 {
  58         return -ENXIO;
  59 }
  60
  61 static int vgic_v2_has_attr(struct kvm_device *dev,
  62                             struct kvm_device_attr *attr)
  63 {
  64         return -ENXIO;
  65 }
  66
  67 struct kvm_device_ops kvm_arm_vgic_v2_ops = {
  68         .name = "kvm-arm-vgic-v2",
  69         .create = vgic_create,
  70         .destroy = vgic_destroy,
  71         .set_attr = vgic_v2_set_attr,
  72         .get_attr = vgic_v2_get_attr,
  73         .has_attr = vgic_v2_has_attr,
  74 };
  75
  76 /* V3 ops */
  77
  78 #ifdef CONFIG_KVM_ARM_VGIC_V3
  79
  80 static int vgic_v3_set_attr(struct kvm_device *dev,
  81                             struct kvm_device_attr *attr)
  82 {
  83         return -ENXIO;
  84 }
  85
  86 static int vgic_v3_get_attr(struct kvm_device *dev,
  87                             struct kvm_device_attr *attr)
  88 {
  89         return -ENXIO;
  90 }
  91
  92 static int vgic_v3_has_attr(struct kvm_device *dev,
  93                             struct kvm_device_attr *attr)
  94 {
  95         return -ENXIO;
  96 }
  97
  98 struct kvm_device_ops kvm_arm_vgic_v3_ops = {
  99         .name = "kvm-arm-vgic-v3",
 100         .create = vgic_create,
 101         .destroy = vgic_destroy,
 102         .set_attr = vgic_v3_set_attr,
 103         .get_attr = vgic_v3_get_attr,
 104         .has_attr = vgic_v3_has_attr,
 105 };
 106
 107 #endif /* CONFIG_KVM_ARM_VGIC_V3 */
 108