virt/kvm/arm/vgic.h

   1 /*
   2  * Copyright (C) 2012-2014 ARM Ltd.
   3  * Author: Marc Zyngier <marc.zyngier@arm.com>
   4  *
   5  * Derived from virt/kvm/arm/vgic.c
   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  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef __KVM_VGIC_H__
  21 #define __KVM_VGIC_H__
  22
  23 #include <kvm/iodev.h>
  24
  25 #define VGIC_ADDR_UNDEF         (-1)
  26 #define IS_VGIC_ADDR_UNDEF(_x)  ((_x) == VGIC_ADDR_UNDEF)
  27
  28 #define PRODUCT_ID_KVM          0x4b    /* ASCII code K */
  29 #define IMPLEMENTER_ARM         0x43b
  30
  31 #define ACCESS_READ_VALUE       (1 << 0)
  32 #define ACCESS_READ_RAZ         (0 << 0)
  33 #define ACCESS_READ_MASK(x)     ((x) & (1 << 0))
  34 #define ACCESS_WRITE_IGNORED    (0 << 1)
  35 #define ACCESS_WRITE_SETBIT     (1 << 1)
  36 #define ACCESS_WRITE_CLEARBIT   (2 << 1)
  37 #define ACCESS_WRITE_VALUE      (3 << 1)
  38 #define ACCESS_WRITE_MASK(x)    ((x) & (3 << 1))
  39
  40 #define VCPU_NOT_ALLOCATED      ((u8)-1)
  41
  42 unsigned long *vgic_bitmap_get_shared_map(struct vgic_bitmap *x);
  43
  44 void vgic_update_state(struct kvm *kvm);
  45 int vgic_init_common_maps(struct kvm *kvm);
  46
  47 u32 *vgic_bitmap_get_reg(struct vgic_bitmap *x, int cpuid, u32 offset);
  48 u32 *vgic_bytemap_get_reg(struct vgic_bytemap *x, int cpuid, u32 offset);
  49
  50 void vgic_dist_irq_set_pending(struct kvm_vcpu *vcpu, int irq);
  51 void vgic_dist_irq_clear_pending(struct kvm_vcpu *vcpu, int irq);
  52 void vgic_cpu_irq_clear(struct kvm_vcpu *vcpu, int irq);
  53 void vgic_bitmap_set_irq_val(struct vgic_bitmap *x, int cpuid,
  54                              int irq, int val);
  55
  56 void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  57 void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
  58
  59 bool vgic_queue_irq(struct kvm_vcpu *vcpu, u8 sgi_source_id, int irq);
  60 void vgic_unqueue_irqs(struct kvm_vcpu *vcpu);
  61
  62 struct kvm_exit_mmio {
  63         phys_addr_t     phys_addr;
  64         void            *data;
  65         u32             len;
  66         bool            is_write;
  67         void            *private;
  68 };
  69
  70 void vgic_reg_access(struct kvm_exit_mmio *mmio, u32 *reg,
  71                      phys_addr_t offset, int mode);
  72 bool handle_mmio_raz_wi(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
  73                         phys_addr_t offset);
  74
  75 static inline
  76 u32 mmio_data_read(struct kvm_exit_mmio *mmio, u32 mask)
  77 {
  78         return le32_to_cpu(*((u32 *)mmio->data)) & mask;
  79 }
  80
  81 static inline
  82 void mmio_data_write(struct kvm_exit_mmio *mmio, u32 mask, u32 value)
  83 {
  84         *((u32 *)mmio->data) = cpu_to_le32(value) & mask;
  85 }
  86
  87 struct vgic_io_range {
  88         phys_addr_t base;
  89         unsigned long len;
  90         int bits_per_irq;
  91         bool (*handle_mmio)(struct kvm_vcpu *vcpu, struct kvm_exit_mmio *mmio,
  92                             phys_addr_t offset);
  93 };
  94
  95 int vgic_register_kvm_io_dev(struct kvm *kvm, gpa_t base, int len,
  96                              const struct vgic_io_range *ranges,
  97                              int redist_id,
  98                              struct vgic_io_device *iodev);
  99
 100 static inline bool is_in_range(phys_addr_t addr, unsigned long len,
 101                                phys_addr_t baseaddr, unsigned long size)
 102 {
 103         return (addr >= baseaddr) && (addr + len <= baseaddr + size);
 104 }
 105
 106 const
 107 struct vgic_io_range *vgic_find_range(const struct vgic_io_range *ranges,
 108                                       int len, gpa_t offset);
 109
 110 bool vgic_handle_enable_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
 111                             phys_addr_t offset, int vcpu_id, int access);
 112
 113 bool vgic_handle_set_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
 114                                  phys_addr_t offset, int vcpu_id);
 115
 116 bool vgic_handle_clear_pending_reg(struct kvm *kvm, struct kvm_exit_mmio *mmio,
 117                                    phys_addr_t offset, int vcpu_id);
 118
 119 bool vgic_handle_set_active_reg(struct kvm *kvm,
 120                                 struct kvm_exit_mmio *mmio,
 121                                 phys_addr_t offset, int vcpu_id);
 122
 123 bool vgic_handle_clear_active_reg(struct kvm *kvm,
 124                                   struct kvm_exit_mmio *mmio,
 125                                   phys_addr_t offset, int vcpu_id);
 126
 127 bool vgic_handle_cfg_reg(u32 *reg, struct kvm_exit_mmio *mmio,
 128                          phys_addr_t offset);
 129
 130 void vgic_kick_vcpus(struct kvm *kvm);
 131
 132 int vgic_has_attr_regs(const struct vgic_io_range *ranges, phys_addr_t offset);
 133 int vgic_set_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);
 134 int vgic_get_common_attr(struct kvm_device *dev, struct kvm_device_attr *attr);
 135
 136 int vgic_init(struct kvm *kvm);
 137 void vgic_v2_init_emulation(struct kvm *kvm);
 138 void vgic_v3_init_emulation(struct kvm *kvm);
 139
 140 #endif