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 VGIC_PRI_BITS           5
  29
  30 #define vgic_irq_is_sgi(intid) ((intid) < VGIC_NR_SGIS)
  31
  32 struct vgic_vmcr {
  33         u32     ctlr;
  34         u32     abpr;
  35         u32     bpr;
  36         u32     pmr;
  37 };
  38
  39 struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
  40                               u32 intid);
  41 void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
  42 bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq);
  43 void vgic_kick_vcpus(struct kvm *kvm);
  44
  45 int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
  46                       phys_addr_t addr, phys_addr_t alignment);
  47
  48 void vgic_v2_process_maintenance(struct kvm_vcpu *vcpu);
  49 void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
  50 void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
  51 void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
  52 void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
  53 int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
  54 int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
  55                          int offset, u32 *val);
  56 int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
  57                           int offset, u32 *val);
  58 void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  59 void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  60 void vgic_v2_enable(struct kvm_vcpu *vcpu);
  61 int vgic_v2_probe(const struct gic_kvm_info *info);
  62 int vgic_v2_map_resources(struct kvm *kvm);
  63 int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
  64                              enum vgic_type);
  65
  66 #ifdef CONFIG_KVM_ARM_VGIC_V3
  67 void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu);
  68 void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
  69 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
  70 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
  71 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
  72 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  73 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  74 void vgic_v3_enable(struct kvm_vcpu *vcpu);
  75 int vgic_v3_probe(const struct gic_kvm_info *info);
  76 int vgic_v3_map_resources(struct kvm *kvm);
  77 int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address);
  78 bool vgic_has_its(struct kvm *kvm);
  79 #else
  80 static inline void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu)
  81 {
  82 }
  83
  84 static inline void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu)
  85 {
  86 }
  87
  88 static inline void vgic_v3_populate_lr(struct kvm_vcpu *vcpu,
  89                                        struct vgic_irq *irq, int lr)
  90 {
  91 }
  92
  93 static inline void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr)
  94 {
  95 }
  96
  97 static inline void vgic_v3_set_underflow(struct kvm_vcpu *vcpu)
  98 {
  99 }
 100
 101 static inline
 102 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)
 103 {
 104 }
 105
 106 static inline
 107 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr)
 108 {
 109 }
 110
 111 static inline void vgic_v3_enable(struct kvm_vcpu *vcpu)
 112 {
 113 }
 114
 115 static inline int vgic_v3_probe(const struct gic_kvm_info *info)
 116 {
 117         return -ENODEV;
 118 }
 119
 120 static inline int vgic_v3_map_resources(struct kvm *kvm)
 121 {
 122         return -ENODEV;
 123 }
 124
 125 static inline int vgic_register_redist_iodevs(struct kvm *kvm,
 126                                               gpa_t dist_base_address)
 127 {
 128         return -ENODEV;
 129 }
 130
 131 static inline bool vgic_has_its(struct kvm *kvm)
 132 {
 133         return false;
 134 }
 135
 136 #endif
 137
 138 int kvm_register_vgic_device(unsigned long type);
 139 int vgic_lazy_init(struct kvm *kvm);
 140 int vgic_init(struct kvm *kvm);
 141
 142 #endif