2 * Copyright (C) 2012,2013 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
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>
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.
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.
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/>.
22 #ifndef __ARM64_KVM_HOST_H__
23 #define __ARM64_KVM_HOST_H__
25 #include <linux/types.h>
26 #include <linux/kvm_types.h>
28 #include <asm/kvm_asm.h>
29 #include <asm/kvm_mmio.h>
31 #if defined(CONFIG_KVM_ARM_MAX_VCPUS)
32 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
34 #define KVM_MAX_VCPUS 0
37 #define KVM_USER_MEM_SLOTS 32
38 #define KVM_PRIVATE_MEM_SLOTS 4
39 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
41 #include <kvm/arm_vgic.h>
42 #include <kvm/arm_arch_timer.h>
44 #define KVM_VCPU_MAX_FEATURES 3
46 int __attribute_const__ kvm_target_cpu(void);
47 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
48 int kvm_arch_dev_ioctl_check_extension(long ext);
51 /* The VMID generation used for the virt. memory system */
55 /* 1-level 2nd stage table and lock */
59 /* VTTBR value associated with above pgd and vmid */
62 /* The maximum number of vCPUs depends on the used GIC model */
65 /* Interrupt controller */
66 struct vgic_dist vgic;
69 struct arch_timer_kvm timer;
72 #define KVM_NR_MEM_OBJS 40
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.
78 struct kvm_mmu_memory_cache {
80 void *objects[KVM_NR_MEM_OBJS];
83 struct kvm_vcpu_fault_info {
84 u32 esr_el2; /* Hyp Syndrom Register */
85 u64 far_el2; /* Hyp Fault Address Register */
86 u64 hpfar_el2; /* Hyp IPA Fault Address Register */
89 struct kvm_cpu_context {
90 struct kvm_regs gp_regs;
92 u64 sys_regs[NR_SYS_REGS];
93 u32 copro[NR_COPRO_REGS];
97 typedef struct kvm_cpu_context kvm_cpu_context_t;
99 struct kvm_vcpu_arch {
100 struct kvm_cpu_context ctxt;
102 /* HYP configuration */
105 /* Exception Information */
106 struct kvm_vcpu_fault_info fault;
111 /* Pointer to host CPU context */
112 kvm_cpu_context_t *host_cpu_context;
115 struct vgic_cpu vgic_cpu;
116 struct arch_timer_cpu timer_cpu;
119 * Anything that is not used directly from assembly code goes
123 /* Don't run the guest */
126 /* IO related fields */
127 struct kvm_decode mmio_decode;
129 /* Interrupt related fields */
130 u64 irq_lines; /* IRQ and FIQ levels */
132 /* Cache some mmu pages needed inside spinlock regions */
133 struct kvm_mmu_memory_cache mmu_page_cache;
135 /* Target CPU and feature flags */
137 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
139 /* Detect first run of a vcpu */
143 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
144 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
146 * CP14 and CP15 live in the same array, as they are backed by the
147 * same system registers.
149 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)])
150 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)])
152 #ifdef CONFIG_CPU_BIG_ENDIAN
153 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r))
154 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1)
156 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1)
157 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r))
161 u32 remote_tlb_flush;
164 struct kvm_vcpu_stat {
165 u32 halt_successful_poll;
169 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
170 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
171 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
172 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
173 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
175 #define KVM_ARCH_WANT_MMU_NOTIFIER
176 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
177 int kvm_unmap_hva_range(struct kvm *kvm,
178 unsigned long start, unsigned long end);
179 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
181 /* We do not have shadow page tables, hence the empty hooks */
182 static inline int kvm_age_hva(struct kvm *kvm, unsigned long start,
188 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
193 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
194 unsigned long address)
198 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
199 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);
201 u64 kvm_call_hyp(void *hypfn, ...);
202 void force_vm_exit(const cpumask_t *mask);
203 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
205 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
206 int exception_index);
208 int kvm_perf_init(void);
209 int kvm_perf_teardown(void);
211 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
213 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
215 unsigned long hyp_stack_ptr,
216 unsigned long vector_ptr)
219 * Call initialization code, and switch to the full blown
222 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
223 hyp_stack_ptr, vector_ptr);
226 struct vgic_sr_vectors {
231 static inline void vgic_arch_setup(const struct vgic_params *vgic)
233 extern struct vgic_sr_vectors __vgic_sr_vectors;
238 __vgic_sr_vectors.save_vgic = __save_vgic_v2_state;
239 __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state;
242 #ifdef CONFIG_ARM_GIC_V3
244 __vgic_sr_vectors.save_vgic = __save_vgic_v3_state;
245 __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state;
254 static inline void kvm_arch_hardware_disable(void) {}
255 static inline void kvm_arch_hardware_unsetup(void) {}
256 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
257 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
258 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
260 #endif /* __ARM64_KVM_HOST_H__ */