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 static inline bool irq_is_pending(struct vgic_irq *irq)
  34 {
  35         if (irq->config == VGIC_CONFIG_EDGE)
  36                 return irq->pending_latch;
  37         else
  38                 return irq->pending_latch || irq->line_level;
  39 }
  40
  41 struct vgic_vmcr {
  42         u32     ctlr;
  43         u32     abpr;
  44         u32     bpr;
  45         u32     pmr;
  46 };
  47
  48 struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
  49                               u32 intid);
  50 void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
  51 bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq);
  52 void vgic_kick_vcpus(struct kvm *kvm);
  53
  54 int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
  55                       phys_addr_t addr, phys_addr_t alignment);
  56
  57 void vgic_v2_process_maintenance(struct kvm_vcpu *vcpu);
  58 void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
  59 void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
  60 void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
  61 void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
  62 int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
  63 int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
  64                          int offset, u32 *val);
  65 int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
  66                           int offset, u32 *val);
  67 void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  68 void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  69 void vgic_v2_enable(struct kvm_vcpu *vcpu);
  70 int vgic_v2_probe(const struct gic_kvm_info *info);
  71 int vgic_v2_map_resources(struct kvm *kvm);
  72 int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
  73                              enum vgic_type);
  74
  75 static inline void vgic_get_irq_kref(struct vgic_irq *irq)
  76 {
  77         if (irq->intid < VGIC_MIN_LPI)
  78                 return;
  79
  80         kref_get(&irq->refcount);
  81 }
  82
  83 void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu);
  84 void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
  85 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
  86 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
  87 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
  88 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  89 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  90 void vgic_v3_enable(struct kvm_vcpu *vcpu);
  91 int vgic_v3_probe(const struct gic_kvm_info *info);
  92 int vgic_v3_map_resources(struct kvm *kvm);
  93 int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address);
  94
  95 int vgic_register_its_iodevs(struct kvm *kvm);
  96 bool vgic_has_its(struct kvm *kvm);
  97 int kvm_vgic_register_its_device(void);
  98 void vgic_enable_lpis(struct kvm_vcpu *vcpu);
  99 int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
 100
 101 int kvm_register_vgic_device(unsigned long type);
 102 int vgic_lazy_init(struct kvm *kvm);
 103 int vgic_init(struct kvm *kvm);
 104
 105 #endif