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__
23 #include <asm/kvm_asm.h>
24 #include <asm/kvm_mmio.h>
25 #include <asm/fpstate.h>
26 #include <asm/kvm_arch_timer.h>
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
34 #define KVM_VCPU_MAX_FEATURES 1
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)
41 #include <asm/kvm_vgic.h>
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
);
50 /* VTTBR value associated with below pgd and vmid */
54 struct arch_timer_kvm timer
;
57 * Anything that is not used directly from assembly code goes
61 /* The VMID generation used for the virt. memory system */
65 /* Stage-2 page table */
68 /* Interrupt controller */
69 struct vgic_dist vgic
;
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 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 */
90 typedef struct vfp_hard_struct kvm_cpu_context_t
;
92 struct kvm_vcpu_arch
{
95 int target
; /* Processor target */
96 DECLARE_BITMAP(features
, KVM_VCPU_MAX_FEATURES
);
98 /* System control coprocessor (cp15) */
99 u32 cp15
[NR_CP15_REGS
];
101 /* The CPU type we expose to the VM */
104 /* Exception Information */
105 struct kvm_vcpu_fault_info fault
;
107 /* Floating point registers (VFP and Advanced SIMD/NEON) */
108 struct vfp_hard_struct vfp_guest
;
110 /* Host FP context */
111 kvm_cpu_context_t
*host_cpu_context
;
114 struct vgic_cpu vgic_cpu
;
115 struct arch_timer_cpu timer_cpu
;
118 * Anything that is not used directly from assembly code goes
121 /* dcache set/way operation pending */
123 cpumask_t require_dcache_flush
;
125 /* Don't run the guest on this vcpu */
128 /* IO related fields */
129 struct kvm_decode mmio_decode
;
131 /* Interrupt related fields */
132 u32 irq_lines
; /* IRQ and FIQ levels */
134 /* Cache some mmu pages needed inside spinlock regions */
135 struct kvm_mmu_memory_cache mmu_page_cache
;
137 /* Detect first run of a vcpu */
142 u32 remote_tlb_flush
;
145 struct kvm_vcpu_stat
{
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
);
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
);
160 #define KVM_ARCH_WANT_MMU_NOTIFIER
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
);
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
);
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
)
176 static inline int kvm_test_age_hva(struct kvm
*kvm
, unsigned long hva
)
181 struct kvm_vcpu
*kvm_arm_get_running_vcpu(void);
182 struct kvm_vcpu __percpu
**kvm_get_running_vcpus(void);
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
);
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
*);
190 int handle_exit(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
191 int exception_index
);
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
)
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
203 * Note that we slightly misuse the prototype by casing the
204 * stack pointer to a void *.
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
214 kvm_call_hyp(NULL
, 0, boot_pgd_ptr
);
216 kvm_call_hyp((void*)hyp_stack_ptr
, vector_ptr
, pgd_ptr
);
219 static inline int kvm_arch_dev_ioctl_check_extension(long ext
)
224 int kvm_perf_init(void);
225 int kvm_perf_teardown(void);
227 #endif /* __ARM_KVM_HOST_H__ */