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 <linux/types.h>
23 #include <linux/kvm_types.h>
24 #include <asm/kvm.h>
25 #include <asm/kvm_asm.h>
26 #include <asm/kvm_mmio.h>
27 #include <asm/fpstate.h>
28 #include <kvm/arm_arch_timer.h>
29
30 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
31
32 #if defined(CONFIG_KVM_ARM_MAX_VCPUS)
33 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
34 #else
35 #define KVM_MAX_VCPUS 0
36 #endif
37
38 #define KVM_USER_MEM_SLOTS 32
39 #define KVM_PRIVATE_MEM_SLOTS 4
40 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
41 #define KVM_HAVE_ONE_REG
42
43 #define KVM_VCPU_MAX_FEATURES 2
44
45 #include <kvm/arm_vgic.h>
46
47 u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
48 int __attribute_const__ kvm_target_cpu(void);
49 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
50 void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
51
52 struct kvm_arch {
53 /* VTTBR value associated with below pgd and vmid */
54 u64 vttbr;
55
56 /* Timer */
57 struct arch_timer_kvm timer;
58
59 /*
60 * Anything that is not used directly from assembly code goes
61 * here.
62 */
63
64 /* The VMID generation used for the virt. memory system */
65 u64 vmid_gen;
66 u32 vmid;
67
68 /* Stage-2 page table */
69 pgd_t *pgd;
70
71 /* Interrupt controller */
72 struct vgic_dist vgic;
73 int max_vcpus;
74 };
75
76 #define KVM_NR_MEM_OBJS 40
77
78 /*
79 * We don't want allocation failures within the mmu code, so we preallocate
80 * enough memory for a single page fault in a cache.
81 */
82 struct kvm_mmu_memory_cache {
83 int nobjs;
84 void *objects[KVM_NR_MEM_OBJS];
85 };
86
87 struct kvm_vcpu_fault_info {
88 u32 hsr; /* Hyp Syndrome Register */
89 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
90 u32 hpfar; /* Hyp IPA Fault Address Register */
91 u32 hyp_pc; /* PC when exception was taken from Hyp mode */
92 };
93
94 typedef struct vfp_hard_struct kvm_cpu_context_t;
95
96 struct kvm_vcpu_arch {
97 struct kvm_regs regs;
98
99 int target; /* Processor target */
100 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
101
102 /* System control coprocessor (cp15) */
103 u32 cp15[NR_CP15_REGS];
104
105 /* The CPU type we expose to the VM */
106 u32 midr;
107
108 /* HYP trapping configuration */
109 u32 hcr;
110
111 /* Interrupt related fields */
112 u32 irq_lines; /* IRQ and FIQ levels */
113
114 /* Exception Information */
115 struct kvm_vcpu_fault_info fault;
116
117 /* Floating point registers (VFP and Advanced SIMD/NEON) */
118 struct vfp_hard_struct vfp_guest;
119
120 /* Host FP context */
121 kvm_cpu_context_t *host_cpu_context;
122
123 /* VGIC state */
124 struct vgic_cpu vgic_cpu;
125 struct arch_timer_cpu timer_cpu;
126
127 /*
128 * Anything that is not used directly from assembly code goes
129 * here.
130 */
131
132 /* Don't run the guest on this vcpu */
133 bool pause;
134
135 /* IO related fields */
136 struct kvm_decode mmio_decode;
137
138 /* Cache some mmu pages needed inside spinlock regions */
139 struct kvm_mmu_memory_cache mmu_page_cache;
140
141 /* Detect first run of a vcpu */
142 bool has_run_once;
143 };
144
145 struct kvm_vm_stat {
146 u32 remote_tlb_flush;
147 };
148
149 struct kvm_vcpu_stat {
150 u32 halt_successful_poll;
151 u32 halt_wakeup;
152 };
153
154 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
155 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
156 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
157 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
158 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
159 u64 kvm_call_hyp(void *hypfn, ...);
160 void force_vm_exit(const cpumask_t *mask);
161
162 #define KVM_ARCH_WANT_MMU_NOTIFIER
163 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
164 int kvm_unmap_hva_range(struct kvm *kvm,
165 unsigned long start, unsigned long end);
166 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
167
168 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
169 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
170 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
171 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
172
173 /* We do not have shadow page tables, hence the empty hooks */
kvm_arch_mmu_notifier_invalidate_page(struct kvm * kvm,unsigned long address)174 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
175 unsigned long address)
176 {
177 }
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 int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
185 int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
186
187 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
188 int exception_index);
189
__cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,phys_addr_t pgd_ptr,unsigned long hyp_stack_ptr,unsigned long vector_ptr)190 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
191 phys_addr_t pgd_ptr,
192 unsigned long hyp_stack_ptr,
193 unsigned long vector_ptr)
194 {
195 /*
196 * Call initialization code, and switch to the full blown HYP
197 * code. The init code doesn't need to preserve these
198 * registers as r0-r3 are already callee saved according to
199 * the AAPCS.
200 * Note that we slightly misuse the prototype by casing the
201 * stack pointer to a void *.
202 *
203 * We don't have enough registers to perform the full init in
204 * one go. Install the boot PGD first, and then install the
205 * runtime PGD, stack pointer and vectors. The PGDs are always
206 * passed as the third argument, in order to be passed into
207 * r2-r3 to the init code (yes, this is compliant with the
208 * PCS!).
209 */
210
211 kvm_call_hyp(NULL, 0, boot_pgd_ptr);
212
213 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
214 }
215
kvm_arch_dev_ioctl_check_extension(long ext)216 static inline int kvm_arch_dev_ioctl_check_extension(long ext)
217 {
218 return 0;
219 }
220
vgic_arch_setup(const struct vgic_params * vgic)221 static inline void vgic_arch_setup(const struct vgic_params *vgic)
222 {
223 BUG_ON(vgic->type != VGIC_V2);
224 }
225
226 int kvm_perf_init(void);
227 int kvm_perf_teardown(void);
228
229 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
230
231 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
232
kvm_arch_hardware_disable(void)233 static inline void kvm_arch_hardware_disable(void) {}
kvm_arch_hardware_unsetup(void)234 static inline void kvm_arch_hardware_unsetup(void) {}
kvm_arch_sync_events(struct kvm * kvm)235 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
kvm_arch_vcpu_uninit(struct kvm_vcpu * vcpu)236 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
kvm_arch_sched_in(struct kvm_vcpu * vcpu,int cpu)237 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
238
239 #endif /* __ARM_KVM_HOST_H__ */
240