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4f8d6632 MZ |
1 | /* |
2 | * Copyright (C) 2012,2013 - ARM Ltd | |
3 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
4 | * | |
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> | |
8 | * | |
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. | |
12 | * | |
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. | |
17 | * | |
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/>. | |
20 | */ | |
21 | ||
22 | #ifndef __ARM64_KVM_HOST_H__ | |
23 | #define __ARM64_KVM_HOST_H__ | |
24 | ||
65647300 PB |
25 | #include <linux/types.h> |
26 | #include <linux/kvm_types.h> | |
4f8d6632 MZ |
27 | #include <asm/kvm.h> |
28 | #include <asm/kvm_asm.h> | |
29 | #include <asm/kvm_mmio.h> | |
30 | ||
da781470 AP |
31 | #if defined(CONFIG_KVM_ARM_MAX_VCPUS) |
32 | #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS | |
33 | #else | |
34 | #define KVM_MAX_VCPUS 0 | |
35 | #endif | |
36 | ||
4f8d6632 MZ |
37 | #define KVM_USER_MEM_SLOTS 32 |
38 | #define KVM_PRIVATE_MEM_SLOTS 4 | |
39 | #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 | |
40 | ||
41 | #include <kvm/arm_vgic.h> | |
42 | #include <kvm/arm_arch_timer.h> | |
43 | ||
7d0f84aa | 44 | #define KVM_VCPU_MAX_FEATURES 3 |
4f8d6632 | 45 | |
4f8d6632 MZ |
46 | int kvm_target_cpu(void); |
47 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu); | |
48 | int kvm_arch_dev_ioctl_check_extension(long ext); | |
49 | ||
50 | struct kvm_arch { | |
51 | /* The VMID generation used for the virt. memory system */ | |
52 | u64 vmid_gen; | |
53 | u32 vmid; | |
54 | ||
55 | /* 1-level 2nd stage table and lock */ | |
56 | spinlock_t pgd_lock; | |
57 | pgd_t *pgd; | |
58 | ||
59 | /* VTTBR value associated with above pgd and vmid */ | |
60 | u64 vttbr; | |
61 | ||
62 | /* Interrupt controller */ | |
63 | struct vgic_dist vgic; | |
64 | ||
65 | /* Timer */ | |
66 | struct arch_timer_kvm timer; | |
67 | }; | |
68 | ||
69 | #define KVM_NR_MEM_OBJS 40 | |
70 | ||
71 | /* | |
72 | * We don't want allocation failures within the mmu code, so we preallocate | |
73 | * enough memory for a single page fault in a cache. | |
74 | */ | |
75 | struct kvm_mmu_memory_cache { | |
76 | int nobjs; | |
77 | void *objects[KVM_NR_MEM_OBJS]; | |
78 | }; | |
79 | ||
80 | struct kvm_vcpu_fault_info { | |
81 | u32 esr_el2; /* Hyp Syndrom Register */ | |
82 | u64 far_el2; /* Hyp Fault Address Register */ | |
83 | u64 hpfar_el2; /* Hyp IPA Fault Address Register */ | |
84 | }; | |
85 | ||
86 | struct kvm_cpu_context { | |
87 | struct kvm_regs gp_regs; | |
40033a61 MZ |
88 | union { |
89 | u64 sys_regs[NR_SYS_REGS]; | |
72564016 | 90 | u32 copro[NR_COPRO_REGS]; |
40033a61 | 91 | }; |
4f8d6632 MZ |
92 | }; |
93 | ||
94 | typedef struct kvm_cpu_context kvm_cpu_context_t; | |
95 | ||
96 | struct kvm_vcpu_arch { | |
97 | struct kvm_cpu_context ctxt; | |
98 | ||
99 | /* HYP configuration */ | |
100 | u64 hcr_el2; | |
101 | ||
102 | /* Exception Information */ | |
103 | struct kvm_vcpu_fault_info fault; | |
104 | ||
0c557ed4 MZ |
105 | /* Debug state */ |
106 | u64 debug_flags; | |
107 | ||
4f8d6632 MZ |
108 | /* Pointer to host CPU context */ |
109 | kvm_cpu_context_t *host_cpu_context; | |
110 | ||
111 | /* VGIC state */ | |
112 | struct vgic_cpu vgic_cpu; | |
113 | struct arch_timer_cpu timer_cpu; | |
114 | ||
115 | /* | |
116 | * Anything that is not used directly from assembly code goes | |
117 | * here. | |
118 | */ | |
119 | /* dcache set/way operation pending */ | |
120 | int last_pcpu; | |
121 | cpumask_t require_dcache_flush; | |
122 | ||
123 | /* Don't run the guest */ | |
124 | bool pause; | |
125 | ||
126 | /* IO related fields */ | |
127 | struct kvm_decode mmio_decode; | |
128 | ||
129 | /* Interrupt related fields */ | |
130 | u64 irq_lines; /* IRQ and FIQ levels */ | |
131 | ||
132 | /* Cache some mmu pages needed inside spinlock regions */ | |
133 | struct kvm_mmu_memory_cache mmu_page_cache; | |
134 | ||
135 | /* Target CPU and feature flags */ | |
6c8c0c4d | 136 | int target; |
4f8d6632 MZ |
137 | DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); |
138 | ||
139 | /* Detect first run of a vcpu */ | |
140 | bool has_run_once; | |
141 | }; | |
142 | ||
143 | #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) | |
144 | #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) | |
72564016 MZ |
145 | /* |
146 | * CP14 and CP15 live in the same array, as they are backed by the | |
147 | * same system registers. | |
148 | */ | |
149 | #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) | |
150 | #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) | |
4f8d6632 | 151 | |
f0a3eaff | 152 | #ifdef CONFIG_CPU_BIG_ENDIAN |
dedf97e8 MZ |
153 | #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) |
154 | #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) | |
f0a3eaff | 155 | #else |
dedf97e8 MZ |
156 | #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) |
157 | #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) | |
f0a3eaff VK |
158 | #endif |
159 | ||
4f8d6632 MZ |
160 | struct kvm_vm_stat { |
161 | u32 remote_tlb_flush; | |
162 | }; | |
163 | ||
164 | struct kvm_vcpu_stat { | |
165 | u32 halt_wakeup; | |
166 | }; | |
167 | ||
4f8d6632 MZ |
168 | int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
169 | const struct kvm_vcpu_init *init); | |
473bdc0e | 170 | int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); |
4f8d6632 MZ |
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); | |
4f8d6632 MZ |
173 | int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
174 | int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
175 | ||
176 | #define KVM_ARCH_WANT_MMU_NOTIFIER | |
4f8d6632 MZ |
177 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); |
178 | int kvm_unmap_hva_range(struct kvm *kvm, | |
179 | unsigned long start, unsigned long end); | |
180 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); | |
181 | ||
182 | /* We do not have shadow page tables, hence the empty hooks */ | |
183 | static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) | |
184 | { | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) | |
189 | { | |
190 | return 0; | |
191 | } | |
192 | ||
193 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void); | |
194 | struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); | |
195 | ||
196 | u64 kvm_call_hyp(void *hypfn, ...); | |
197 | ||
198 | int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, | |
199 | int exception_index); | |
200 | ||
201 | int kvm_perf_init(void); | |
202 | int kvm_perf_teardown(void); | |
203 | ||
092bd143 MZ |
204 | static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, |
205 | phys_addr_t pgd_ptr, | |
206 | unsigned long hyp_stack_ptr, | |
207 | unsigned long vector_ptr) | |
208 | { | |
209 | /* | |
210 | * Call initialization code, and switch to the full blown | |
211 | * HYP code. | |
212 | */ | |
213 | kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, | |
214 | hyp_stack_ptr, vector_ptr); | |
215 | } | |
216 | ||
1a9b1305 MZ |
217 | struct vgic_sr_vectors { |
218 | void *save_vgic; | |
219 | void *restore_vgic; | |
220 | }; | |
221 | ||
222 | static inline void vgic_arch_setup(const struct vgic_params *vgic) | |
223 | { | |
224 | extern struct vgic_sr_vectors __vgic_sr_vectors; | |
225 | ||
226 | switch(vgic->type) | |
227 | { | |
228 | case VGIC_V2: | |
229 | __vgic_sr_vectors.save_vgic = __save_vgic_v2_state; | |
230 | __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state; | |
231 | break; | |
232 | ||
67b2abfe MZ |
233 | #ifdef CONFIG_ARM_GIC_V3 |
234 | case VGIC_V3: | |
235 | __vgic_sr_vectors.save_vgic = __save_vgic_v3_state; | |
236 | __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state; | |
237 | break; | |
238 | #endif | |
239 | ||
1a9b1305 MZ |
240 | default: |
241 | BUG(); | |
242 | } | |
243 | } | |
244 | ||
4f8d6632 | 245 | #endif /* __ARM64_KVM_HOST_H__ */ |