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 #define VGIC_AFFINITY_0_SHIFT 0
  34 #define VGIC_AFFINITY_0_MASK (0xffUL << VGIC_AFFINITY_0_SHIFT)
  35 #define VGIC_AFFINITY_1_SHIFT 8
  36 #define VGIC_AFFINITY_1_MASK (0xffUL << VGIC_AFFINITY_1_SHIFT)
  37 #define VGIC_AFFINITY_2_SHIFT 16
  38 #define VGIC_AFFINITY_2_MASK (0xffUL << VGIC_AFFINITY_2_SHIFT)
  39 #define VGIC_AFFINITY_3_SHIFT 24
  40 #define VGIC_AFFINITY_3_MASK (0xffUL << VGIC_AFFINITY_3_SHIFT)
  41
  42 #define VGIC_AFFINITY_LEVEL(reg, level) \
  43         ((((reg) & VGIC_AFFINITY_## level ##_MASK) \
  44         >> VGIC_AFFINITY_## level ##_SHIFT) << MPIDR_LEVEL_SHIFT(level))
  45
  46 /*
  47  * The Userspace encodes the affinity differently from the MPIDR,
  48  * Below macro converts vgic userspace format to MPIDR reg format.
  49  */
  50 #define VGIC_TO_MPIDR(val) (VGIC_AFFINITY_LEVEL(val, 0) | \
  51                             VGIC_AFFINITY_LEVEL(val, 1) | \
  52                             VGIC_AFFINITY_LEVEL(val, 2) | \
  53                             VGIC_AFFINITY_LEVEL(val, 3))
  54
  55 /*
  56  * As per Documentation/virtual/kvm/devices/arm-vgic-v3.txt,
  57  * below macros are defined for CPUREG encoding.
  58  */
  59 #define KVM_REG_ARM_VGIC_SYSREG_OP0_MASK   0x000000000000c000
  60 #define KVM_REG_ARM_VGIC_SYSREG_OP0_SHIFT  14
  61 #define KVM_REG_ARM_VGIC_SYSREG_OP1_MASK   0x0000000000003800
  62 #define KVM_REG_ARM_VGIC_SYSREG_OP1_SHIFT  11
  63 #define KVM_REG_ARM_VGIC_SYSREG_CRN_MASK   0x0000000000000780
  64 #define KVM_REG_ARM_VGIC_SYSREG_CRN_SHIFT  7
  65 #define KVM_REG_ARM_VGIC_SYSREG_CRM_MASK   0x0000000000000078
  66 #define KVM_REG_ARM_VGIC_SYSREG_CRM_SHIFT  3
  67 #define KVM_REG_ARM_VGIC_SYSREG_OP2_MASK   0x0000000000000007
  68 #define KVM_REG_ARM_VGIC_SYSREG_OP2_SHIFT  0
  69
  70 #define KVM_DEV_ARM_VGIC_SYSREG_MASK (KVM_REG_ARM_VGIC_SYSREG_OP0_MASK | \
  71                                       KVM_REG_ARM_VGIC_SYSREG_OP1_MASK | \
  72                                       KVM_REG_ARM_VGIC_SYSREG_CRN_MASK | \
  73                                       KVM_REG_ARM_VGIC_SYSREG_CRM_MASK | \
  74                                       KVM_REG_ARM_VGIC_SYSREG_OP2_MASK)
  75
  76 static inline bool irq_is_pending(struct vgic_irq *irq)
  77 {
  78         if (irq->config == VGIC_CONFIG_EDGE)
  79                 return irq->pending_latch;
  80         else
  81                 return irq->pending_latch || irq->line_level;
  82 }
  83
  84 /*
  85  * This struct provides an intermediate representation of the fields contained
  86  * in the GICH_VMCR and ICH_VMCR registers, such that code exporting the GIC
  87  * state to userspace can generate either GICv2 or GICv3 CPU interface
  88  * registers regardless of the hardware backed GIC used.
  89  */
  90 struct vgic_vmcr {
  91         u32     ctlr;
  92         u32     abpr;
  93         u32     bpr;
  94         u32     pmr;  /* Priority mask field in the GICC_PMR and
  95                        * ICC_PMR_EL1 priority field format */
  96         /* Below member variable are valid only for GICv3 */
  97         u32     grpen0;
  98         u32     grpen1;
  99 };
 100
 101 struct vgic_reg_attr {
 102         struct kvm_vcpu *vcpu;
 103         gpa_t addr;
 104 };
 105
 106 int vgic_v3_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
 107                        struct vgic_reg_attr *reg_attr);
 108 int vgic_v2_parse_attr(struct kvm_device *dev, struct kvm_device_attr *attr,
 109                        struct vgic_reg_attr *reg_attr);
 110 const struct vgic_register_region *
 111 vgic_get_mmio_region(struct kvm_vcpu *vcpu, struct vgic_io_device *iodev,
 112                      gpa_t addr, int len);
 113 struct vgic_irq *vgic_get_irq(struct kvm *kvm, struct kvm_vcpu *vcpu,
 114                               u32 intid);
 115 void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq);
 116 bool vgic_queue_irq_unlock(struct kvm *kvm, struct vgic_irq *irq);
 117 void vgic_kick_vcpus(struct kvm *kvm);
 118
 119 int vgic_check_ioaddr(struct kvm *kvm, phys_addr_t *ioaddr,
 120                       phys_addr_t addr, phys_addr_t alignment);
 121
 122 void vgic_v2_process_maintenance(struct kvm_vcpu *vcpu);
 123 void vgic_v2_fold_lr_state(struct kvm_vcpu *vcpu);
 124 void vgic_v2_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
 125 void vgic_v2_clear_lr(struct kvm_vcpu *vcpu, int lr);
 126 void vgic_v2_set_underflow(struct kvm_vcpu *vcpu);
 127 int vgic_v2_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
 128 int vgic_v2_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 129                          int offset, u32 *val);
 130 int vgic_v2_cpuif_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 131                           int offset, u32 *val);
 132 void vgic_v2_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 133 void vgic_v2_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 134 void vgic_v2_enable(struct kvm_vcpu *vcpu);
 135 int vgic_v2_probe(const struct gic_kvm_info *info);
 136 int vgic_v2_map_resources(struct kvm *kvm);
 137 int vgic_register_dist_iodev(struct kvm *kvm, gpa_t dist_base_address,
 138                              enum vgic_type);
 139
 140 void vgic_v2_init_lrs(void);
 141
 142 static inline void vgic_get_irq_kref(struct vgic_irq *irq)
 143 {
 144         if (irq->intid < VGIC_MIN_LPI)
 145                 return;
 146
 147         kref_get(&irq->refcount);
 148 }
 149
 150 void vgic_v3_process_maintenance(struct kvm_vcpu *vcpu);
 151 void vgic_v3_fold_lr_state(struct kvm_vcpu *vcpu);
 152 void vgic_v3_populate_lr(struct kvm_vcpu *vcpu, struct vgic_irq *irq, int lr);
 153 void vgic_v3_clear_lr(struct kvm_vcpu *vcpu, int lr);
 154 void vgic_v3_set_underflow(struct kvm_vcpu *vcpu);
 155 void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 156 void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 157 void vgic_v3_enable(struct kvm_vcpu *vcpu);
 158 int vgic_v3_probe(const struct gic_kvm_info *info);
 159 int vgic_v3_map_resources(struct kvm *kvm);
 160 int vgic_register_redist_iodevs(struct kvm *kvm, gpa_t dist_base_address);
 161
 162 int vgic_register_its_iodevs(struct kvm *kvm);
 163 bool vgic_has_its(struct kvm *kvm);
 164 int kvm_vgic_register_its_device(void);
 165 void vgic_enable_lpis(struct kvm_vcpu *vcpu);
 166 int vgic_its_inject_msi(struct kvm *kvm, struct kvm_msi *msi);
 167 int vgic_v3_has_attr_regs(struct kvm_device *dev, struct kvm_device_attr *attr);
 168 int vgic_v3_dist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 169                          int offset, u32 *val);
 170 int vgic_v3_redist_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 171                          int offset, u32 *val);
 172 int vgic_v3_cpu_sysregs_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 173                          u64 id, u64 *val);
 174 int vgic_v3_has_cpu_sysregs_attr(struct kvm_vcpu *vcpu, bool is_write, u64 id,
 175                                 u64 *reg);
 176 int vgic_v3_line_level_info_uaccess(struct kvm_vcpu *vcpu, bool is_write,
 177                                     u32 intid, u64 *val);
 178 int kvm_register_vgic_device(unsigned long type);
 179 void vgic_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 180 void vgic_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcr);
 181 int vgic_lazy_init(struct kvm *kvm);
 182 int vgic_init(struct kvm *kvm);
 183
 184 int vgic_debug_init(struct kvm *kvm);
 185 int vgic_debug_destroy(struct kvm *kvm);
 186
 187 #endif