2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
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.
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.
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.
19 #ifndef __ARM_KVM_HOST_H__
20 #define __ARM_KVM_HOST_H__
22 #include <linux/types.h>
23 #include <linux/kvm_types.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>
30 #if defined(CONFIG_KVM_ARM_MAX_VCPUS)
31 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
33 #define KVM_MAX_VCPUS 0
36 #define KVM_USER_MEM_SLOTS 32
37 #define KVM_PRIVATE_MEM_SLOTS 4
38 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
39 #define KVM_HAVE_ONE_REG
41 #define KVM_VCPU_MAX_FEATURES 2
43 #include <kvm/arm_vgic.h>
45 u32
*kvm_vcpu_reg(struct kvm_vcpu
*vcpu
, u8 reg_num
, u32 mode
);
46 int __attribute_const__
kvm_target_cpu(void);
47 int kvm_reset_vcpu(struct kvm_vcpu
*vcpu
);
48 void kvm_reset_coprocs(struct kvm_vcpu
*vcpu
);
51 /* VTTBR value associated with below pgd and vmid */
55 struct arch_timer_kvm timer
;
58 * Anything that is not used directly from assembly code goes
62 /* The VMID generation used for the virt. memory system */
66 /* Stage-2 page table */
69 /* Interrupt controller */
70 struct vgic_dist vgic
;
73 #define KVM_NR_MEM_OBJS 40
76 * We don't want allocation failures within the mmu code, so we preallocate
77 * enough memory for a single page fault in a cache.
79 struct kvm_mmu_memory_cache
{
81 void *objects
[KVM_NR_MEM_OBJS
];
84 struct kvm_vcpu_fault_info
{
85 u32 hsr
; /* Hyp Syndrome Register */
86 u32 hxfar
; /* Hyp Data/Inst. Fault Address Register */
87 u32 hpfar
; /* Hyp IPA Fault Address Register */
88 u32 hyp_pc
; /* PC when exception was taken from Hyp mode */
91 typedef struct vfp_hard_struct kvm_cpu_context_t
;
93 struct kvm_vcpu_arch
{
96 int target
; /* Processor target */
97 DECLARE_BITMAP(features
, KVM_VCPU_MAX_FEATURES
);
99 /* System control coprocessor (cp15) */
100 u32 cp15
[NR_CP15_REGS
];
102 /* The CPU type we expose to the VM */
105 /* HYP trapping configuration */
108 /* Interrupt related fields */
109 u32 irq_lines
; /* IRQ and FIQ levels */
111 /* Exception Information */
112 struct kvm_vcpu_fault_info fault
;
114 /* Floating point registers (VFP and Advanced SIMD/NEON) */
115 struct vfp_hard_struct vfp_guest
;
117 /* Host FP context */
118 kvm_cpu_context_t
*host_cpu_context
;
121 struct vgic_cpu vgic_cpu
;
122 struct arch_timer_cpu timer_cpu
;
125 * Anything that is not used directly from assembly code goes
129 /* Don't run the guest on this vcpu */
132 /* IO related fields */
133 struct kvm_decode mmio_decode
;
135 /* Cache some mmu pages needed inside spinlock regions */
136 struct kvm_mmu_memory_cache mmu_page_cache
;
138 /* Detect first run of a vcpu */
143 u32 remote_tlb_flush
;
146 struct kvm_vcpu_stat
{
150 int kvm_vcpu_preferred_target(struct kvm_vcpu_init
*init
);
151 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
152 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
153 int kvm_arm_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
154 int kvm_arm_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
155 u64
kvm_call_hyp(void *hypfn
, ...);
156 void force_vm_exit(const cpumask_t
*mask
);
158 #define KVM_ARCH_WANT_MMU_NOTIFIER
159 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
160 int kvm_unmap_hva_range(struct kvm
*kvm
,
161 unsigned long start
, unsigned long end
);
162 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
164 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
165 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
167 /* We do not have shadow page tables, hence the empty hooks */
168 static inline int kvm_age_hva(struct kvm
*kvm
, unsigned long start
,
174 static inline int kvm_test_age_hva(struct kvm
*kvm
, unsigned long hva
)
179 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm
*kvm
,
180 unsigned long address
)
184 struct kvm_vcpu
*kvm_arm_get_running_vcpu(void);
185 struct kvm_vcpu __percpu
**kvm_get_running_vcpus(void);
187 int kvm_arm_copy_coproc_indices(struct kvm_vcpu
*vcpu
, u64 __user
*uindices
);
188 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu
*vcpu
);
189 int kvm_arm_coproc_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
190 int kvm_arm_coproc_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
192 int handle_exit(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
193 int exception_index
);
195 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr
,
197 unsigned long hyp_stack_ptr
,
198 unsigned long vector_ptr
)
201 * Call initialization code, and switch to the full blown HYP
202 * code. The init code doesn't need to preserve these
203 * registers as r0-r3 are already callee saved according to
205 * Note that we slightly misuse the prototype by casing the
206 * stack pointer to a void *.
208 * We don't have enough registers to perform the full init in
209 * one go. Install the boot PGD first, and then install the
210 * runtime PGD, stack pointer and vectors. The PGDs are always
211 * passed as the third argument, in order to be passed into
212 * r2-r3 to the init code (yes, this is compliant with the
216 kvm_call_hyp(NULL
, 0, boot_pgd_ptr
);
218 kvm_call_hyp((void*)hyp_stack_ptr
, vector_ptr
, pgd_ptr
);
221 static inline int kvm_arch_dev_ioctl_check_extension(long ext
)
226 static inline void vgic_arch_setup(const struct vgic_params
*vgic
)
228 BUG_ON(vgic
->type
!= VGIC_V2
);
231 int kvm_perf_init(void);
232 int kvm_perf_teardown(void);
234 static inline void kvm_arch_hardware_disable(void) {}
235 static inline void kvm_arch_hardware_unsetup(void) {}
236 static inline void kvm_arch_sync_events(struct kvm
*kvm
) {}
237 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
) {}
238 static inline void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
) {}
240 #endif /* __ARM_KVM_HOST_H__ */