2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * Derived from arch/arm/include/asm/kvm_host.h:
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #ifndef __ARM64_KVM_HOST_H__
23 #define __ARM64_KVM_HOST_H__
26 #include <asm/kvm_asm.h>
27 #include <asm/kvm_mmio.h>
29 #if defined(CONFIG_KVM_ARM_MAX_VCPUS)
30 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
32 #define KVM_MAX_VCPUS 0
35 #define KVM_USER_MEM_SLOTS 32
36 #define KVM_PRIVATE_MEM_SLOTS 4
37 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
39 #include <kvm/arm_vgic.h>
40 #include <kvm/arm_arch_timer.h>
42 #define KVM_VCPU_MAX_FEATURES 3
45 int kvm_target_cpu(void);
46 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
47 int kvm_arch_dev_ioctl_check_extension(long ext);
50 /* The VMID generation used for the virt. memory system */
54 /* 1-level 2nd stage table and lock */
58 /* VTTBR value associated with above pgd and vmid */
61 /* Interrupt controller */
62 struct vgic_dist vgic;
65 struct arch_timer_kvm timer;
68 #define KVM_NR_MEM_OBJS 40
71 * We don't want allocation failures within the mmu code, so we preallocate
72 * enough memory for a single page fault in a cache.
74 struct kvm_mmu_memory_cache {
76 void *objects[KVM_NR_MEM_OBJS];
79 struct kvm_vcpu_fault_info {
80 u32 esr_el2; /* Hyp Syndrom Register */
81 u64 far_el2; /* Hyp Fault Address Register */
82 u64 hpfar_el2; /* Hyp IPA Fault Address Register */
85 struct kvm_cpu_context {
86 struct kvm_regs gp_regs;
88 u64 sys_regs[NR_SYS_REGS];
89 u32 copro[NR_COPRO_REGS];
93 typedef struct kvm_cpu_context kvm_cpu_context_t;
95 struct kvm_vcpu_arch {
96 struct kvm_cpu_context ctxt;
98 /* HYP configuration */
101 /* Exception Information */
102 struct kvm_vcpu_fault_info fault;
107 /* Pointer to host CPU context */
108 kvm_cpu_context_t *host_cpu_context;
111 struct vgic_cpu vgic_cpu;
112 struct arch_timer_cpu timer_cpu;
115 * Anything that is not used directly from assembly code goes
118 /* dcache set/way operation pending */
120 cpumask_t require_dcache_flush;
122 /* Don't run the guest */
125 /* IO related fields */
126 struct kvm_decode mmio_decode;
128 /* Interrupt related fields */
129 u64 irq_lines; /* IRQ and FIQ levels */
131 /* Cache some mmu pages needed inside spinlock regions */
132 struct kvm_mmu_memory_cache mmu_page_cache;
134 /* Target CPU and feature flags */
136 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
138 /* Detect first run of a vcpu */
142 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
143 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
145 * CP14 and CP15 live in the same array, as they are backed by the
146 * same system registers.
148 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)])
149 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)])
151 #ifdef CONFIG_CPU_BIG_ENDIAN
152 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r))
153 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1)
155 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1)
156 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r))
160 u32 remote_tlb_flush;
163 struct kvm_vcpu_stat {
167 struct kvm_vcpu_init;
168 int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
169 const struct kvm_vcpu_init *init);
170 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
171 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
172 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
174 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
175 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
177 #define KVM_ARCH_WANT_MMU_NOTIFIER
179 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
180 int kvm_unmap_hva_range(struct kvm *kvm,
181 unsigned long start, unsigned long end);
182 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
184 /* We do not have shadow page tables, hence the empty hooks */
185 static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
190 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
195 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
196 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
198 u64 kvm_call_hyp(void *hypfn, ...);
200 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
201 int exception_index);
203 int kvm_perf_init(void);
204 int kvm_perf_teardown(void);
206 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
208 unsigned long hyp_stack_ptr,
209 unsigned long vector_ptr)
212 * Call initialization code, and switch to the full blown
215 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
216 hyp_stack_ptr, vector_ptr);
219 struct vgic_sr_vectors {
224 static inline void vgic_arch_setup(const struct vgic_params *vgic)
226 extern struct vgic_sr_vectors __vgic_sr_vectors;
231 __vgic_sr_vectors.save_vgic = __save_vgic_v2_state;
232 __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state;
235 #ifdef CONFIG_ARM_GIC_V3
237 __vgic_sr_vectors.save_vgic = __save_vgic_v3_state;
238 __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state;
247 #endif /* __ARM64_KVM_HOST_H__ */