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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> |
53e72406 | 26 | #include <asm/kvm_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 | ||
1a89dd91 MZ |
41 | #include <asm/kvm_vgic.h> |
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 | ||
9c7a6432 MZ |
90 | typedef struct vfp_hard_struct kvm_kernel_vfp_t; |
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) */ |
9c7a6432 MZ |
108 | kvm_kernel_vfp_t vfp_guest; |
109 | kvm_kernel_vfp_t *vfp_host; | |
f7ed45be | 110 | |
1a89dd91 MZ |
111 | /* VGIC state */ |
112 | struct vgic_cpu vgic_cpu; | |
53e72406 | 113 | struct arch_timer_cpu timer_cpu; |
1a89dd91 | 114 | |
f7ed45be CD |
115 | /* |
116 | * Anything that is not used directly from assembly code goes | |
117 | * here. | |
118 | */ | |
5b3e5e5b CD |
119 | /* dcache set/way operation pending */ |
120 | int last_pcpu; | |
121 | cpumask_t require_dcache_flush; | |
122 | ||
aa024c2f MZ |
123 | /* Don't run the guest on this vcpu */ |
124 | bool pause; | |
125 | ||
45e96ea6 CD |
126 | /* IO related fields */ |
127 | struct kvm_decode mmio_decode; | |
128 | ||
749cf76c CD |
129 | /* Interrupt related fields */ |
130 | u32 irq_lines; /* IRQ and FIQ levels */ | |
131 | ||
749cf76c CD |
132 | /* Cache some mmu pages needed inside spinlock regions */ |
133 | struct kvm_mmu_memory_cache mmu_page_cache; | |
f7ed45be CD |
134 | |
135 | /* Detect first run of a vcpu */ | |
136 | bool has_run_once; | |
749cf76c CD |
137 | }; |
138 | ||
139 | struct kvm_vm_stat { | |
140 | u32 remote_tlb_flush; | |
141 | }; | |
142 | ||
143 | struct kvm_vcpu_stat { | |
144 | u32 halt_wakeup; | |
145 | }; | |
146 | ||
147 | struct kvm_vcpu_init; | |
148 | int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, | |
149 | const struct kvm_vcpu_init *init); | |
150 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); | |
151 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); | |
152 | struct kvm_one_reg; | |
153 | int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
154 | int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); | |
342cd0ab | 155 | u64 kvm_call_hyp(void *hypfn, ...); |
f7ed45be | 156 | void force_vm_exit(const cpumask_t *mask); |
d5d8184d CD |
157 | |
158 | #define KVM_ARCH_WANT_MMU_NOTIFIER | |
159 | struct kvm; | |
160 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); | |
161 | int kvm_unmap_hva_range(struct kvm *kvm, | |
162 | unsigned long start, unsigned long end); | |
163 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); | |
164 | ||
1138245c CD |
165 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); |
166 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); | |
167 | ||
d5d8184d CD |
168 | /* We do not have shadow page tables, hence the empty hooks */ |
169 | static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) | |
175 | { | |
176 | return 0; | |
177 | } | |
1638a12d MZ |
178 | |
179 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void); | |
180 | struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); | |
181 | ||
182 | int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); | |
183 | unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu); | |
184 | struct kvm_one_reg; | |
185 | int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); | |
186 | int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); | |
187 | ||
3414bbff MZ |
188 | int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, |
189 | int exception_index); | |
190 | ||
e7858c58 MZ |
191 | static inline void __cpu_init_hyp_mode(unsigned long long pgd_ptr, |
192 | unsigned long hyp_stack_ptr, | |
193 | unsigned long vector_ptr) | |
194 | { | |
195 | unsigned long pgd_low, pgd_high; | |
196 | ||
197 | pgd_low = (pgd_ptr & ((1ULL << 32) - 1)); | |
198 | pgd_high = (pgd_ptr >> 32ULL); | |
199 | ||
200 | /* | |
201 | * Call initialization code, and switch to the full blown | |
202 | * HYP code. The init code doesn't need to preserve these registers as | |
203 | * r1-r3 and r12 are already callee save according to the AAPCS. | |
204 | * Note that we slightly misuse the prototype by casing the pgd_low to | |
205 | * a void *. | |
206 | */ | |
207 | kvm_call_hyp((void *)pgd_low, pgd_high, hyp_stack_ptr, vector_ptr); | |
208 | } | |
209 | ||
210552c1 MZ |
210 | int kvm_perf_init(void); |
211 | int kvm_perf_teardown(void); | |
212 | ||
749cf76c | 213 | #endif /* __ARM_KVM_HOST_H__ */ |