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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 | ||
c1426e4c EA |
31 | #define __KVM_HAVE_ARCH_INTC_INITIALIZED |
32 | ||
4f8d6632 MZ |
33 | #define KVM_USER_MEM_SLOTS 32 |
34 | #define KVM_PRIVATE_MEM_SLOTS 4 | |
35 | #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 | |
920552b2 | 36 | #define KVM_HALT_POLL_NS_DEFAULT 500000 |
4f8d6632 MZ |
37 | |
38 | #include <kvm/arm_vgic.h> | |
39 | #include <kvm/arm_arch_timer.h> | |
40 | ||
ef748917 ML |
41 | #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS |
42 | ||
7d0f84aa | 43 | #define KVM_VCPU_MAX_FEATURES 3 |
4f8d6632 | 44 | |
6951e48b | 45 | int __attribute_const__ kvm_target_cpu(void); |
4f8d6632 MZ |
46 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu); |
47 | int kvm_arch_dev_ioctl_check_extension(long ext); | |
48 | ||
49 | struct kvm_arch { | |
50 | /* The VMID generation used for the virt. memory system */ | |
51 | u64 vmid_gen; | |
52 | u32 vmid; | |
53 | ||
54 | /* 1-level 2nd stage table and lock */ | |
55 | spinlock_t pgd_lock; | |
56 | pgd_t *pgd; | |
57 | ||
58 | /* VTTBR value associated with above pgd and vmid */ | |
59 | u64 vttbr; | |
60 | ||
3caa2d8c AP |
61 | /* The maximum number of vCPUs depends on the used GIC model */ |
62 | int max_vcpus; | |
63 | ||
4f8d6632 MZ |
64 | /* Interrupt controller */ |
65 | struct vgic_dist vgic; | |
66 | ||
67 | /* Timer */ | |
68 | struct arch_timer_kvm timer; | |
69 | }; | |
70 | ||
71 | #define KVM_NR_MEM_OBJS 40 | |
72 | ||
73 | /* | |
74 | * We don't want allocation failures within the mmu code, so we preallocate | |
75 | * enough memory for a single page fault in a cache. | |
76 | */ | |
77 | struct kvm_mmu_memory_cache { | |
78 | int nobjs; | |
79 | void *objects[KVM_NR_MEM_OBJS]; | |
80 | }; | |
81 | ||
82 | struct kvm_vcpu_fault_info { | |
83 | u32 esr_el2; /* Hyp Syndrom Register */ | |
84 | u64 far_el2; /* Hyp Fault Address Register */ | |
85 | u64 hpfar_el2; /* Hyp IPA Fault Address Register */ | |
86 | }; | |
87 | ||
88 | struct kvm_cpu_context { | |
89 | struct kvm_regs gp_regs; | |
40033a61 MZ |
90 | union { |
91 | u64 sys_regs[NR_SYS_REGS]; | |
72564016 | 92 | u32 copro[NR_COPRO_REGS]; |
40033a61 | 93 | }; |
4f8d6632 MZ |
94 | }; |
95 | ||
96 | typedef struct kvm_cpu_context kvm_cpu_context_t; | |
97 | ||
98 | struct kvm_vcpu_arch { | |
99 | struct kvm_cpu_context ctxt; | |
100 | ||
101 | /* HYP configuration */ | |
102 | u64 hcr_el2; | |
56c7f5e7 | 103 | u32 mdcr_el2; |
4f8d6632 MZ |
104 | |
105 | /* Exception Information */ | |
106 | struct kvm_vcpu_fault_info fault; | |
107 | ||
84e690bf | 108 | /* Guest debug state */ |
0c557ed4 MZ |
109 | u64 debug_flags; |
110 | ||
84e690bf AB |
111 | /* |
112 | * We maintain more than a single set of debug registers to support | |
113 | * debugging the guest from the host and to maintain separate host and | |
114 | * guest state during world switches. vcpu_debug_state are the debug | |
115 | * registers of the vcpu as the guest sees them. host_debug_state are | |
834bf887 AB |
116 | * the host registers which are saved and restored during |
117 | * world switches. external_debug_state contains the debug | |
118 | * values we want to debug the guest. This is set via the | |
119 | * KVM_SET_GUEST_DEBUG ioctl. | |
84e690bf AB |
120 | * |
121 | * debug_ptr points to the set of debug registers that should be loaded | |
122 | * onto the hardware when running the guest. | |
123 | */ | |
124 | struct kvm_guest_debug_arch *debug_ptr; | |
125 | struct kvm_guest_debug_arch vcpu_debug_state; | |
834bf887 | 126 | struct kvm_guest_debug_arch external_debug_state; |
84e690bf | 127 | |
4f8d6632 MZ |
128 | /* Pointer to host CPU context */ |
129 | kvm_cpu_context_t *host_cpu_context; | |
84e690bf | 130 | struct kvm_guest_debug_arch host_debug_state; |
4f8d6632 MZ |
131 | |
132 | /* VGIC state */ | |
133 | struct vgic_cpu vgic_cpu; | |
134 | struct arch_timer_cpu timer_cpu; | |
135 | ||
136 | /* | |
137 | * Anything that is not used directly from assembly code goes | |
138 | * here. | |
139 | */ | |
4f8d6632 | 140 | |
337b99bf AB |
141 | /* |
142 | * Guest registers we preserve during guest debugging. | |
143 | * | |
144 | * These shadow registers are updated by the kvm_handle_sys_reg | |
145 | * trap handler if the guest accesses or updates them while we | |
146 | * are using guest debug. | |
147 | */ | |
148 | struct { | |
149 | u32 mdscr_el1; | |
150 | } guest_debug_preserved; | |
151 | ||
4f8d6632 MZ |
152 | /* Don't run the guest */ |
153 | bool pause; | |
154 | ||
155 | /* IO related fields */ | |
156 | struct kvm_decode mmio_decode; | |
157 | ||
158 | /* Interrupt related fields */ | |
159 | u64 irq_lines; /* IRQ and FIQ levels */ | |
160 | ||
161 | /* Cache some mmu pages needed inside spinlock regions */ | |
162 | struct kvm_mmu_memory_cache mmu_page_cache; | |
163 | ||
164 | /* Target CPU and feature flags */ | |
6c8c0c4d | 165 | int target; |
4f8d6632 MZ |
166 | DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); |
167 | ||
168 | /* Detect first run of a vcpu */ | |
169 | bool has_run_once; | |
170 | }; | |
171 | ||
172 | #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) | |
173 | #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) | |
72564016 MZ |
174 | /* |
175 | * CP14 and CP15 live in the same array, as they are backed by the | |
176 | * same system registers. | |
177 | */ | |
178 | #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) | |
179 | #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) | |
4f8d6632 | 180 | |
f0a3eaff | 181 | #ifdef CONFIG_CPU_BIG_ENDIAN |
dedf97e8 MZ |
182 | #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) |
183 | #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) | |
f0a3eaff | 184 | #else |
dedf97e8 MZ |
185 | #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) |
186 | #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) | |
f0a3eaff VK |
187 | #endif |
188 | ||
4f8d6632 MZ |
189 | struct kvm_vm_stat { |
190 | u32 remote_tlb_flush; | |
191 | }; | |
192 | ||
193 | struct kvm_vcpu_stat { | |
f7819512 | 194 | u32 halt_successful_poll; |
62bea5bf | 195 | u32 halt_attempted_poll; |
4f8d6632 MZ |
196 | u32 halt_wakeup; |
197 | }; | |
198 | ||
473bdc0e | 199 | int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); |
4f8d6632 MZ |
200 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); |
201 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); | |
4f8d6632 MZ |
202 | int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
203 | int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
204 | ||
205 | #define KVM_ARCH_WANT_MMU_NOTIFIER | |
4f8d6632 MZ |
206 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); |
207 | int kvm_unmap_hva_range(struct kvm *kvm, | |
208 | unsigned long start, unsigned long end); | |
209 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); | |
35307b9a MZ |
210 | int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); |
211 | int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); | |
4f8d6632 MZ |
212 | |
213 | /* We do not have shadow page tables, hence the empty hooks */ | |
fe71557a TC |
214 | static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, |
215 | unsigned long address) | |
216 | { | |
217 | } | |
218 | ||
4f8d6632 | 219 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void); |
4000be42 | 220 | struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); |
4f8d6632 MZ |
221 | |
222 | u64 kvm_call_hyp(void *hypfn, ...); | |
cf5d3188 | 223 | void force_vm_exit(const cpumask_t *mask); |
8199ed0e | 224 | void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); |
4f8d6632 MZ |
225 | |
226 | int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, | |
227 | int exception_index); | |
228 | ||
229 | int kvm_perf_init(void); | |
230 | int kvm_perf_teardown(void); | |
231 | ||
4429fc64 AP |
232 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); |
233 | ||
092bd143 MZ |
234 | static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, |
235 | phys_addr_t pgd_ptr, | |
236 | unsigned long hyp_stack_ptr, | |
237 | unsigned long vector_ptr) | |
238 | { | |
239 | /* | |
240 | * Call initialization code, and switch to the full blown | |
241 | * HYP code. | |
242 | */ | |
243 | kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, | |
244 | hyp_stack_ptr, vector_ptr); | |
245 | } | |
246 | ||
13a34e06 | 247 | static inline void kvm_arch_hardware_disable(void) {} |
0865e636 RK |
248 | static inline void kvm_arch_hardware_unsetup(void) {} |
249 | static inline void kvm_arch_sync_events(struct kvm *kvm) {} | |
250 | static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} | |
251 | static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} | |
252 | ||
56c7f5e7 AB |
253 | void kvm_arm_init_debug(void); |
254 | void kvm_arm_setup_debug(struct kvm_vcpu *vcpu); | |
255 | void kvm_arm_clear_debug(struct kvm_vcpu *vcpu); | |
84e690bf | 256 | void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu); |
56c7f5e7 | 257 | |
4f8d6632 | 258 | #endif /* __ARM64_KVM_HOST_H__ */ |