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Marc Zyngier4f8d6632012-12-10 16:29:28 +00001/*
2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
4 *
5 * Derived from arch/arm/include/asm/kvm_host.h:
6 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
7 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 */
21
22#ifndef __ARM64_KVM_HOST_H__
23#define __ARM64_KVM_HOST_H__
24
Paolo Bonzini65647302014-08-29 14:01:17 +020025#include <linux/types.h>
26#include <linux/kvm_types.h>
Marc Zyngier4f8d6632012-12-10 16:29:28 +000027#include <asm/kvm.h>
28#include <asm/kvm_asm.h>
29#include <asm/kvm_mmio.h>
30
Eric Augerc1426e42015-03-04 11:14:34 +010031#define __KVM_HAVE_ARCH_INTC_INITIALIZED
32
Anup Patelda781472013-12-12 16:12:22 +000033#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
34#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
35#else
36#define KVM_MAX_VCPUS 0
37#endif
38
Marc Zyngier4f8d6632012-12-10 16:29:28 +000039#define KVM_USER_MEM_SLOTS 32
40#define KVM_PRIVATE_MEM_SLOTS 4
41#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
42
43#include <kvm/arm_vgic.h>
44#include <kvm/arm_arch_timer.h>
45
Anup Patel7d0f84a2014-04-29 11:24:16 +053046#define KVM_VCPU_MAX_FEATURES 3
Marc Zyngier4f8d6632012-12-10 16:29:28 +000047
Will Deacon6951e482014-08-26 15:13:20 +010048int __attribute_const__ kvm_target_cpu(void);
Marc Zyngier4f8d6632012-12-10 16:29:28 +000049int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
50int kvm_arch_dev_ioctl_check_extension(long ext);
51
52struct kvm_arch {
53 /* The VMID generation used for the virt. memory system */
54 u64 vmid_gen;
55 u32 vmid;
56
57 /* 1-level 2nd stage table and lock */
58 spinlock_t pgd_lock;
59 pgd_t *pgd;
60
61 /* VTTBR value associated with above pgd and vmid */
62 u64 vttbr;
63
Andre Przywara3caa2d82014-06-02 16:26:01 +020064 /* The maximum number of vCPUs depends on the used GIC model */
65 int max_vcpus;
66
Marc Zyngier4f8d6632012-12-10 16:29:28 +000067 /* Interrupt controller */
68 struct vgic_dist vgic;
69
70 /* Timer */
71 struct arch_timer_kvm timer;
72};
73
74#define KVM_NR_MEM_OBJS 40
75
76/*
77 * We don't want allocation failures within the mmu code, so we preallocate
78 * enough memory for a single page fault in a cache.
79 */
80struct kvm_mmu_memory_cache {
81 int nobjs;
82 void *objects[KVM_NR_MEM_OBJS];
83};
84
85struct kvm_vcpu_fault_info {
86 u32 esr_el2; /* Hyp Syndrom Register */
87 u64 far_el2; /* Hyp Fault Address Register */
88 u64 hpfar_el2; /* Hyp IPA Fault Address Register */
89};
90
91struct kvm_cpu_context {
92 struct kvm_regs gp_regs;
Marc Zyngier40033a62013-02-06 19:17:50 +000093 union {
94 u64 sys_regs[NR_SYS_REGS];
Marc Zyngier72564012014-04-24 10:27:13 +010095 u32 copro[NR_COPRO_REGS];
Marc Zyngier40033a62013-02-06 19:17:50 +000096 };
Marc Zyngier4f8d6632012-12-10 16:29:28 +000097};
98
99typedef struct kvm_cpu_context kvm_cpu_context_t;
100
101struct kvm_vcpu_arch {
102 struct kvm_cpu_context ctxt;
103
104 /* HYP configuration */
105 u64 hcr_el2;
106
107 /* Exception Information */
108 struct kvm_vcpu_fault_info fault;
109
Marc Zyngier0c557ed2014-04-24 10:24:46 +0100110 /* Debug state */
111 u64 debug_flags;
112
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000113 /* Pointer to host CPU context */
114 kvm_cpu_context_t *host_cpu_context;
115
116 /* VGIC state */
117 struct vgic_cpu vgic_cpu;
118 struct arch_timer_cpu timer_cpu;
119
120 /*
121 * Anything that is not used directly from assembly code goes
122 * here.
123 */
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000124
125 /* Don't run the guest */
126 bool pause;
127
128 /* IO related fields */
129 struct kvm_decode mmio_decode;
130
131 /* Interrupt related fields */
132 u64 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 /* Target CPU and feature flags */
Chen Gang6c8c0c42013-07-22 04:40:38 +0100138 int target;
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000139 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
140
141 /* Detect first run of a vcpu */
142 bool has_run_once;
143};
144
145#define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
146#define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
Marc Zyngier72564012014-04-24 10:27:13 +0100147/*
148 * CP14 and CP15 live in the same array, as they are backed by the
149 * same system registers.
150 */
151#define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)])
152#define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)])
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000153
Victor Kamenskyf0a3eaf2014-07-02 17:19:30 +0100154#ifdef CONFIG_CPU_BIG_ENDIAN
Marc Zyngierdedf97e2014-08-01 12:00:36 +0100155#define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r))
156#define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1)
Victor Kamenskyf0a3eaf2014-07-02 17:19:30 +0100157#else
Marc Zyngierdedf97e2014-08-01 12:00:36 +0100158#define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1)
159#define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r))
Victor Kamenskyf0a3eaf2014-07-02 17:19:30 +0100160#endif
161
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000162struct kvm_vm_stat {
163 u32 remote_tlb_flush;
164};
165
166struct kvm_vcpu_stat {
Paolo Bonzinif7819512015-02-04 18:20:58 +0100167 u32 halt_successful_poll;
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000168 u32 halt_wakeup;
169};
170
Anup Patel473bdc02013-09-30 14:20:06 +0530171int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000172unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
173int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000174int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
175int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
176
177#define KVM_ARCH_WANT_MMU_NOTIFIER
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000178int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
179int kvm_unmap_hva_range(struct kvm *kvm,
180 unsigned long start, unsigned long end);
181void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
Marc Zyngier35307b92015-03-12 18:16:51 +0000182int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
183int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000184
185/* We do not have shadow page tables, hence the empty hooks */
Tang Chenfe715572014-09-24 15:57:57 +0800186static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
187 unsigned long address)
188{
189}
190
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000191struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
Will Deacon4000be42014-08-26 15:13:21 +0100192struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000193
194u64 kvm_call_hyp(void *hypfn, ...);
Christoffer Dallcf5d31882014-10-16 17:00:18 +0200195void force_vm_exit(const cpumask_t *mask);
Mario Smarduch8199ed02015-01-15 15:58:59 -0800196void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000197
198int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
199 int exception_index);
200
201int kvm_perf_init(void);
202int kvm_perf_teardown(void);
203
Andre Przywara4429fc62014-06-02 15:37:13 +0200204struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
205
Marc Zyngier092bd142012-12-17 17:07:52 +0000206static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
207 phys_addr_t pgd_ptr,
208 unsigned long hyp_stack_ptr,
209 unsigned long vector_ptr)
210{
211 /*
212 * Call initialization code, and switch to the full blown
213 * HYP code.
214 */
215 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
216 hyp_stack_ptr, vector_ptr);
217}
218
Marc Zyngier1a9b1302013-06-21 11:57:56 +0100219struct vgic_sr_vectors {
220 void *save_vgic;
221 void *restore_vgic;
222};
223
Radim Krčmář13a34e02014-08-28 15:13:03 +0200224static inline void kvm_arch_hardware_disable(void) {}
Radim Krčmář0865e632014-08-28 15:13:02 +0200225static inline void kvm_arch_hardware_unsetup(void) {}
226static inline void kvm_arch_sync_events(struct kvm *kvm) {}
227static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
228static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
229
Marc Zyngier4f8d6632012-12-10 16:29:28 +0000230#endif /* __ARM64_KVM_HOST_H__ */