Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
[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_arch {
84 struct kvm_regs regs;
85
86 int target; /* Processor target */
87 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
88
89 /* System control coprocessor (cp15) */
90 u32 cp15[NR_CP15_REGS];
91
92 /* The CPU type we expose to the VM */
93 u32 midr;
94
95 /* Exception Information */
96 u32 hsr; /* Hyp Syndrome Register */
97 u32 hxfar; /* Hyp Data/Inst Fault Address Register */
98 u32 hpfar; /* Hyp IPA Fault Address Register */
99
100 /* Floating point registers (VFP and Advanced SIMD/NEON) */
101 struct vfp_hard_struct vfp_guest;
102 struct vfp_hard_struct *vfp_host;
103
104 /* VGIC state */
105 struct vgic_cpu vgic_cpu;
106 struct arch_timer_cpu timer_cpu;
107
108 /*
109 * Anything that is not used directly from assembly code goes
110 * here.
111 */
112 /* dcache set/way operation pending */
113 int last_pcpu;
114 cpumask_t require_dcache_flush;
115
116 /* Don't run the guest on this vcpu */
117 bool pause;
118
119 /* IO related fields */
120 struct kvm_decode mmio_decode;
121
122 /* Interrupt related fields */
123 u32 irq_lines; /* IRQ and FIQ levels */
124
125 /* Hyp exception information */
126 u32 hyp_pc; /* PC when exception was taken from Hyp mode */
127
128 /* Cache some mmu pages needed inside spinlock regions */
129 struct kvm_mmu_memory_cache mmu_page_cache;
130
131 /* Detect first run of a vcpu */
132 bool has_run_once;
133 };
134
135 struct kvm_vm_stat {
136 u32 remote_tlb_flush;
137 };
138
139 struct kvm_vcpu_stat {
140 u32 halt_wakeup;
141 };
142
143 struct kvm_vcpu_init;
144 int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
145 const struct kvm_vcpu_init *init);
146 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
147 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
148 struct kvm_one_reg;
149 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
150 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
151 u64 kvm_call_hyp(void *hypfn, ...);
152 void force_vm_exit(const cpumask_t *mask);
153
154 #define KVM_ARCH_WANT_MMU_NOTIFIER
155 struct kvm;
156 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
157 int kvm_unmap_hva_range(struct kvm *kvm,
158 unsigned long start, unsigned long end);
159 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
160
161 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
162 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
163
164 /* We do not have shadow page tables, hence the empty hooks */
165 static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
166 {
167 return 0;
168 }
169
170 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
171 {
172 return 0;
173 }
174
175 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
176 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
177
178 int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
179 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
180 struct kvm_one_reg;
181 int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
182 int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
183
184 #endif /* __ARM_KVM_HOST_H__ */
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