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749cf76c CD |
1 | /* |
2 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
3 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> | |
4 | * | |
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. | |
8 | * | |
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. | |
13 | * | |
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | */ | |
18 | ||
19 | #ifndef __ARM_KVM_HOST_H__ | |
20 | #define __ARM_KVM_HOST_H__ | |
21 | ||
22 | #include <asm/kvm.h> | |
23 | #include <asm/kvm_asm.h> | |
45e96ea6 | 24 | #include <asm/kvm_mmio.h> |
f7ed45be | 25 | #include <asm/fpstate.h> |
7275acdf | 26 | #include <kvm/arm_arch_timer.h> |
749cf76c CD |
27 | |
28 | #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS | |
2b5e1e47 | 29 | #define KVM_USER_MEM_SLOTS 32 |
749cf76c CD |
30 | #define KVM_PRIVATE_MEM_SLOTS 4 |
31 | #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 | |
1138245c | 32 | #define KVM_HAVE_ONE_REG |
749cf76c | 33 | |
aa024c2f | 34 | #define KVM_VCPU_MAX_FEATURES 1 |
749cf76c CD |
35 | |
36 | /* We don't currently support large pages. */ | |
37 | #define KVM_HPAGE_GFN_SHIFT(x) 0 | |
38 | #define KVM_NR_PAGE_SIZES 1 | |
39 | #define KVM_PAGES_PER_HPAGE(x) (1UL<<31) | |
40 | ||
7275acdf | 41 | #include <kvm/arm_vgic.h> |
1a89dd91 | 42 | |
749cf76c CD |
43 | struct kvm_vcpu; |
44 | u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode); | |
45 | int kvm_target_cpu(void); | |
46 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu); | |
47 | void kvm_reset_coprocs(struct kvm_vcpu *vcpu); | |
48 | ||
49 | struct kvm_arch { | |
50 | /* VTTBR value associated with below pgd and vmid */ | |
51 | u64 vttbr; | |
52 | ||
53e72406 MZ |
53 | /* Timer */ |
54 | struct arch_timer_kvm timer; | |
55 | ||
749cf76c CD |
56 | /* |
57 | * Anything that is not used directly from assembly code goes | |
58 | * here. | |
59 | */ | |
60 | ||
61 | /* The VMID generation used for the virt. memory system */ | |
62 | u64 vmid_gen; | |
63 | u32 vmid; | |
64 | ||
65 | /* Stage-2 page table */ | |
66 | pgd_t *pgd; | |
1a89dd91 MZ |
67 | |
68 | /* Interrupt controller */ | |
69 | struct vgic_dist vgic; | |
749cf76c CD |
70 | }; |
71 | ||
72 | #define KVM_NR_MEM_OBJS 40 | |
73 | ||
74 | /* | |
75 | * We don't want allocation failures within the mmu code, so we preallocate | |
76 | * enough memory for a single page fault in a cache. | |
77 | */ | |
78 | struct kvm_mmu_memory_cache { | |
79 | int nobjs; | |
80 | void *objects[KVM_NR_MEM_OBJS]; | |
81 | }; | |
82 | ||
7393b599 MZ |
83 | struct kvm_vcpu_fault_info { |
84 | u32 hsr; /* Hyp Syndrome Register */ | |
85 | u32 hxfar; /* Hyp Data/Inst. Fault Address Register */ | |
86 | u32 hpfar; /* Hyp IPA Fault Address Register */ | |
87 | u32 hyp_pc; /* PC when exception was taken from Hyp mode */ | |
88 | }; | |
89 | ||
3de50da6 | 90 | typedef struct vfp_hard_struct kvm_cpu_context_t; |
9c7a6432 | 91 | |
749cf76c CD |
92 | struct kvm_vcpu_arch { |
93 | struct kvm_regs regs; | |
94 | ||
95 | int target; /* Processor target */ | |
96 | DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); | |
97 | ||
98 | /* System control coprocessor (cp15) */ | |
99 | u32 cp15[NR_CP15_REGS]; | |
100 | ||
101 | /* The CPU type we expose to the VM */ | |
102 | u32 midr; | |
103 | ||
104 | /* Exception Information */ | |
7393b599 | 105 | struct kvm_vcpu_fault_info fault; |
749cf76c | 106 | |
f7ed45be | 107 | /* Floating point registers (VFP and Advanced SIMD/NEON) */ |
3de50da6 MZ |
108 | struct vfp_hard_struct vfp_guest; |
109 | ||
110 | /* Host FP context */ | |
111 | kvm_cpu_context_t *host_cpu_context; | |
f7ed45be | 112 | |
1a89dd91 MZ |
113 | /* VGIC state */ |
114 | struct vgic_cpu vgic_cpu; | |
53e72406 | 115 | struct arch_timer_cpu timer_cpu; |
1a89dd91 | 116 | |
f7ed45be CD |
117 | /* |
118 | * Anything that is not used directly from assembly code goes | |
119 | * here. | |
120 | */ | |
5b3e5e5b CD |
121 | /* dcache set/way operation pending */ |
122 | int last_pcpu; | |
123 | cpumask_t require_dcache_flush; | |
124 | ||
aa024c2f MZ |
125 | /* Don't run the guest on this vcpu */ |
126 | bool pause; | |
127 | ||
45e96ea6 CD |
128 | /* IO related fields */ |
129 | struct kvm_decode mmio_decode; | |
130 | ||
749cf76c CD |
131 | /* Interrupt related fields */ |
132 | u32 irq_lines; /* IRQ and FIQ levels */ | |
133 | ||
749cf76c CD |
134 | /* Cache some mmu pages needed inside spinlock regions */ |
135 | struct kvm_mmu_memory_cache mmu_page_cache; | |
f7ed45be CD |
136 | |
137 | /* Detect first run of a vcpu */ | |
138 | bool has_run_once; | |
749cf76c CD |
139 | }; |
140 | ||
141 | struct kvm_vm_stat { | |
142 | u32 remote_tlb_flush; | |
143 | }; | |
144 | ||
145 | struct kvm_vcpu_stat { | |
146 | u32 halt_wakeup; | |
147 | }; | |
148 | ||
149 | struct kvm_vcpu_init; | |
150 | int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, | |
151 | const struct kvm_vcpu_init *init); | |
152 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); | |
153 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); | |
154 | struct kvm_one_reg; | |
155 | int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
156 | int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
342cd0ab | 157 | u64 kvm_call_hyp(void *hypfn, ...); |
f7ed45be | 158 | void force_vm_exit(const cpumask_t *mask); |
d5d8184d CD |
159 | |
160 | #define KVM_ARCH_WANT_MMU_NOTIFIER | |
161 | struct kvm; | |
162 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); | |
163 | int kvm_unmap_hva_range(struct kvm *kvm, | |
164 | unsigned long start, unsigned long end); | |
165 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); | |
166 | ||
1138245c CD |
167 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); |
168 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); | |
169 | ||
d5d8184d CD |
170 | /* We do not have shadow page tables, hence the empty hooks */ |
171 | static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) | |
172 | { | |
173 | return 0; | |
174 | } | |
175 | ||
176 | static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) | |
177 | { | |
178 | return 0; | |
179 | } | |
1638a12d MZ |
180 | |
181 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void); | |
182 | struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); | |
183 | ||
184 | int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); | |
185 | unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu); | |
186 | struct kvm_one_reg; | |
187 | int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); | |
188 | int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); | |
189 | ||
3414bbff MZ |
190 | int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, |
191 | int exception_index); | |
192 | ||
5a677ce0 MZ |
193 | static inline void __cpu_init_hyp_mode(unsigned long long boot_pgd_ptr, |
194 | unsigned long long pgd_ptr, | |
e7858c58 MZ |
195 | unsigned long hyp_stack_ptr, |
196 | unsigned long vector_ptr) | |
197 | { | |
e7858c58 | 198 | /* |
5a677ce0 MZ |
199 | * Call initialization code, and switch to the full blown HYP |
200 | * code. The init code doesn't need to preserve these | |
201 | * registers as r0-r3 are already callee saved according to | |
202 | * the AAPCS. | |
203 | * Note that we slightly misuse the prototype by casing the | |
204 | * stack pointer to a void *. | |
205 | * | |
206 | * We don't have enough registers to perform the full init in | |
207 | * one go. Install the boot PGD first, and then install the | |
208 | * runtime PGD, stack pointer and vectors. The PGDs are always | |
209 | * passed as the third argument, in order to be passed into | |
210 | * r2-r3 to the init code (yes, this is compliant with the | |
211 | * PCS!). | |
e7858c58 | 212 | */ |
5a677ce0 MZ |
213 | |
214 | kvm_call_hyp(NULL, 0, boot_pgd_ptr); | |
215 | ||
216 | kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr); | |
e7858c58 MZ |
217 | } |
218 | ||
17b1e31f MZ |
219 | static inline int kvm_arch_dev_ioctl_check_extension(long ext) |
220 | { | |
221 | return 0; | |
222 | } | |
223 | ||
210552c1 MZ |
224 | int kvm_perf_init(void); |
225 | int kvm_perf_teardown(void); | |
226 | ||
749cf76c | 227 | #endif /* __ARM_KVM_HOST_H__ */ |