virt/kvm/arm/vgic/vgic.h

   1 /*
   2  * Copyright (C) 2015, 2016 ARM Ltd.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16 #ifndef __KVM_ARM_VGIC_NEW_H__
  17 #define __KVM_ARM_VGIC_NEW_H__
  18
  19 #include <linux/irqchip/arm-gic-common.h>
  20
  21 #define PRODUCT_ID_KVM          0x4b    /* ASCII code K */
  22 #define IMPLEMENTER_ARM         0x43b
  23
  24 #define VGIC_ADDR_UNDEF         (-1)
  25 #define IS_VGIC_ADDR_UNDEF(_x)  ((_x) == VGIC_ADDR_UNDEF)
  26
  27 #define INTERRUPT_ID_BITS_SPIS  10
  28 #define INTERRUPT_ID_BITS_ITS   16
  29 #define VGIC_PRI_BITS           5
  30
  31 #define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)
  32
  33 struct vgic_vmcr {
  34         u32     ctlr;
  35         u32     abpr;
  36         u32     bpr;
  37         u32     pmr;
  38 };
  39
  40 struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
  41                               u32 intid);
  42 void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
  43 bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq);
  44 void vgic_kick_vcpus(struct kvm *kvm);
  45
  46 int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
  47                       phys_addr_t addr, phys_addr_t alignment);
  48
  49 void vgic_v2_process_maintenance(struct kvm_vcpu *vcpu);
  50 void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
  51 void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
  52 void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
  53 void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
  54 int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
  55 int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
  56                          int offset, u32 *val);
  57 int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
  58                           int offset, u32 *val);
  59 void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  60 void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  61 void vgic_v2_enable(struct kvm_vcpu *vcpu);
  62 int vgic_v2_probe(const struct gic_kvm_info *info);
  63 int vgic_v2_map_resources(struct kvm *kvm);
  64 int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
  65                              enum vgic_type);
  66
  67 static inline void vgic_get_irq_kref(struct vgic_irq *irq)
  68 {
  69         if (irq->intid < VGIC_MIN_LPI)
  70                 return;
  71
  72         kref_get(&irq->refcount);
  73 }
  74
  75 #ifdef CONFIG_KVM_ARM_VGIC_V3
  76 void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu);
  77 void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
  78 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
  79 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
  80 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
  81 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  82 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  83 void vgic_v3_enable(struct kvm_vcpu *vcpu);
  84 int vgic_v3_probe(const struct gic_kvm_info *info);
  85 int vgic_v3_map_resources(struct kvm *kvm);
  86 int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address);
  87 int vgic_register_its_iodevs(struct kvm *kvm);
  88 bool vgic_has_its(struct kvm *kvm);
  89 int kvm_vgic_register_its_device(void);
  90 void vgic_enable_lpis(struct kvm_vcpu *vcpu);
  91 int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
  92 #else
  93 static inline void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu)
  94 {
  95 }
  96
  97 static inline void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
  98 {
  99 }
 100
 101 static inline void vgic_v3_populate_lr(struct kvm_vcpu *vcpu,
 102                                        struct vgic_irq *irq, int lr)
 103 {
 104 }
 105
 106 static inline void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr)
 107 {
 108 }
 109
 110 static inline void vgic_v3_set_underflow(struct kvm_vcpu *vcpu)
 111 {
 112 }
 113
 114 static inline
 115 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)
 116 {
 117 }
 118
 119 static inline
 120 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)
 121 {
 122 }
 123
 124 static inline void vgic_v3_enable(struct kvm_vcpu *vcpu)
 125 {
 126 }
 127
 128 static inline int vgic_v3_probe(const struct gic_kvm_info *info)
 129 {
 130         return -ENODEV;
 131 }
 132
 133 static inline int vgic_v3_map_resources(struct kvm *kvm)
 134 {
 135         return -ENODEV;
 136 }
 137
 138 static inline int vgic_register_redist_iodevs(struct kvm *kvm,
 139                                               gpa_t dist_base_address)
 140 {
 141         return -ENODEV;
 142 }
 143
 144 static inline int vgic_register_its_iodevs(struct kvm *kvm)
 145 {
 146         return -ENODEV;
 147 }
 148
 149 static inline bool vgic_has_its(struct kvm *kvm)
 150 {
 151         return false;
 152 }
 153
 154 static inline int kvm_vgic_register_its_device(void)
 155 {
 156         return -ENODEV;
 157 }
 158
 159 static inline void vgic_enable_lpis(struct kvm_vcpu *vcpu)
 160 {
 161 }
 162
 163 static inline int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi)
 164 {
 165         return -ENODEV;
 166 }
 167 #endif
 168
 169 int kvm_register_vgic_device(unsigned long type);
 170 int vgic_lazy_init(struct kvm *kvm);
 171 int vgic_init(struct kvm *kvm);
 172
 173 #endif