Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
[deliverable/linux.git] / arch / arm / include / asm / kvm_host.h
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>
24 #include <asm/kvm_mmio.h>
25 #include <asm/fpstate.h>
26 #include <asm/kvm_arch_timer.h>
27
28 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
29 #define KVM_USER_MEM_SLOTS 32
30 #define KVM_PRIVATE_MEM_SLOTS 4
31 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
32 #define KVM_HAVE_ONE_REG
33
34 #define KVM_VCPU_MAX_FEATURES 1
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
41 #include <asm/kvm_vgic.h>
42
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
53 /* Timer */
54 struct arch_timer_kvm timer;
55
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;
67
68 /* Interrupt controller */
69 struct vgic_dist vgic;
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
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
90 typedef struct vfp_hard_struct kvm_cpu_context_t;
91
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 */
105 struct kvm_vcpu_fault_info fault;
106
107 /* Floating point registers (VFP and Advanced SIMD/NEON) */
108 struct vfp_hard_struct vfp_guest;
109
110 /* Host FP context */
111 kvm_cpu_context_t *host_cpu_context;
112
113 /* VGIC state */
114 struct vgic_cpu vgic_cpu;
115 struct arch_timer_cpu timer_cpu;
116
117 /*
118 * Anything that is not used directly from assembly code goes
119 * here.
120 */
121 /* dcache set/way operation pending */
122 int last_pcpu;
123 cpumask_t require_dcache_flush;
124
125 /* Don't run the guest on this vcpu */
126 bool pause;
127
128 /* IO related fields */
129 struct kvm_decode mmio_decode;
130
131 /* Interrupt related fields */
132 u32 irq_lines; /* IRQ and FIQ levels */
133
134 /* Cache some mmu pages needed inside spinlock regions */
135 struct kvm_mmu_memory_cache mmu_page_cache;
136
137 /* Detect first run of a vcpu */
138 bool has_run_once;
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);
157 u64 kvm_call_hyp(void *hypfn, ...);
158 void force_vm_exit(const cpumask_t *mask);
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
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
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 }
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
190 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
191 int exception_index);
192
193 static inline void __cpu_init_hyp_mode(unsigned long long boot_pgd_ptr,
194 unsigned long long pgd_ptr,
195 unsigned long hyp_stack_ptr,
196 unsigned long vector_ptr)
197 {
198 /*
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!).
212 */
213
214 kvm_call_hyp(NULL, 0, boot_pgd_ptr);
215
216 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
217 }
218
219 static inline int kvm_arch_dev_ioctl_check_extension(long ext)
220 {
221 return 0;
222 }
223
224 int kvm_perf_init(void);
225 int kvm_perf_teardown(void);
226
227 #endif /* __ARM_KVM_HOST_H__ */
This page took 0.035473 seconds and 6 git commands to generate.