2 * Copyright (C) 2012 ARM Ltd.
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 #ifndef __ASM_ARM_KVM_VGIC_H
20 #define __ASM_ARM_KVM_VGIC_H
22 #include <linux/kernel.h>
23 #include <linux/kvm.h>
24 #include <linux/irqreturn.h>
25 #include <linux/spinlock.h>
26 #include <linux/types.h>
27 #include <linux/irqchip/arm-gic.h>
29 #define VGIC_NR_IRQS 256
30 #define VGIC_NR_SGIS 16
31 #define VGIC_NR_PPIS 16
32 #define VGIC_NR_PRIVATE_IRQS (VGIC_NR_SGIS + VGIC_NR_PPIS)
33 #define VGIC_NR_SHARED_IRQS (VGIC_NR_IRQS - VGIC_NR_PRIVATE_IRQS)
34 #define VGIC_MAX_CPUS KVM_MAX_VCPUS
35 #define VGIC_MAX_LRS (1 << 6)
37 /* Sanity checks... */
38 #if (VGIC_MAX_CPUS > 8)
39 #error Invalid number of CPU interfaces
42 #if (VGIC_NR_IRQS & 31)
43 #error "VGIC_NR_IRQS must be a multiple of 32"
46 #if (VGIC_NR_IRQS > 1024)
47 #error "VGIC_NR_IRQS must be <= 1024"
51 * The GIC distributor registers describing interrupts have two parts:
52 * - 32 per-CPU interrupts (SGI + PPI)
53 * - a bunch of shared interrupts (SPI)
57 u32 reg[VGIC_NR_PRIVATE_IRQS / 32];
58 DECLARE_BITMAP(reg_ul, VGIC_NR_PRIVATE_IRQS);
59 } percpu[VGIC_MAX_CPUS];
61 u32 reg[VGIC_NR_SHARED_IRQS / 32];
62 DECLARE_BITMAP(reg_ul, VGIC_NR_SHARED_IRQS);
67 u32 percpu[VGIC_MAX_CPUS][VGIC_NR_PRIVATE_IRQS / 4];
68 u32 shared[VGIC_NR_SHARED_IRQS / 4];
72 #ifdef CONFIG_KVM_ARM_VGIC
76 /* Virtual control interface mapping */
77 void __iomem *vctrl_base;
79 /* Distributor and vcpu interface mapping in the guest */
80 phys_addr_t vgic_dist_base;
81 phys_addr_t vgic_cpu_base;
83 /* Distributor enabled */
86 /* Interrupt enabled (one bit per IRQ) */
87 struct vgic_bitmap irq_enabled;
89 /* Interrupt 'pin' level */
90 struct vgic_bitmap irq_state;
92 /* Level-triggered interrupt in progress */
93 struct vgic_bitmap irq_active;
95 /* Interrupt priority. Not used yet. */
96 struct vgic_bytemap irq_priority;
98 /* Level/edge triggered */
99 struct vgic_bitmap irq_cfg;
101 /* Source CPU per SGI and target CPU */
102 u8 irq_sgi_sources[VGIC_MAX_CPUS][VGIC_NR_SGIS];
104 /* Target CPU for each IRQ */
105 u8 irq_spi_cpu[VGIC_NR_SHARED_IRQS];
106 struct vgic_bitmap irq_spi_target[VGIC_MAX_CPUS];
108 /* Bitmap indicating which CPU has something pending */
109 unsigned long irq_pending_on_cpu;
114 #ifdef CONFIG_KVM_ARM_VGIC
115 /* per IRQ to LR mapping */
116 u8 vgic_irq_lr_map[VGIC_NR_IRQS];
118 /* Pending interrupts on this VCPU */
119 DECLARE_BITMAP( pending_percpu, VGIC_NR_PRIVATE_IRQS);
120 DECLARE_BITMAP( pending_shared, VGIC_NR_SHARED_IRQS);
122 /* Bitmap of used/free list registers */
123 DECLARE_BITMAP( lr_used, VGIC_MAX_LRS);
125 /* Number of list registers on this CPU */
128 /* CPU vif control registers for world switch */
131 u32 vgic_misr; /* Saved only */
132 u32 vgic_eisr[2]; /* Saved only */
133 u32 vgic_elrsr[2]; /* Saved only */
135 u32 vgic_lr[VGIC_MAX_LRS];
139 #define LR_EMPTY 0xff
144 struct kvm_exit_mmio;
146 #ifdef CONFIG_KVM_ARM_VGIC
147 int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write);
148 int kvm_vgic_hyp_init(void);
149 int kvm_vgic_init(struct kvm *kvm);
150 int kvm_vgic_create(struct kvm *kvm);
151 int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu);
152 void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu);
153 void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu);
154 int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int irq_num,
156 int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu);
157 bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
158 struct kvm_exit_mmio *mmio);
160 #define irqchip_in_kernel(k) (!!((k)->arch.vgic.vctrl_base))
161 #define vgic_initialized(k) ((k)->arch.vgic.ready)
164 static inline int kvm_vgic_hyp_init(void)
169 static inline int kvm_vgic_set_addr(struct kvm *kvm, unsigned long type, u64 addr)
174 static inline int kvm_vgic_addr(struct kvm *kvm, unsigned long type, u64 *addr, bool write)
179 static inline int kvm_vgic_init(struct kvm *kvm)
184 static inline int kvm_vgic_create(struct kvm *kvm)
189 static inline int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
194 static inline void kvm_vgic_flush_hwstate(struct kvm_vcpu *vcpu) {}
195 static inline void kvm_vgic_sync_hwstate(struct kvm_vcpu *vcpu) {}
197 static inline int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid,
198 unsigned int irq_num, bool level)
203 static inline int kvm_vgic_vcpu_pending_irq(struct kvm_vcpu *vcpu)
208 static inline bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
209 struct kvm_exit_mmio *mmio)
214 static inline int irqchip_in_kernel(struct kvm *kvm)
219 static inline bool vgic_initialized(struct kvm *kvm)