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 #define __KVM_HAVE_ARCH_INTC_INITIALIZED
32 #define KVM_USER_MEM_SLOTS 32
33 #define KVM_PRIVATE_MEM_SLOTS 4
34 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
35 #define KVM_HAVE_ONE_REG
36 #define KVM_HALT_POLL_NS_DEFAULT 500000
38 #define KVM_VCPU_MAX_FEATURES 2
40 #include <kvm/arm_vgic.h>
42 #define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS
44 u32
*kvm_vcpu_reg(struct kvm_vcpu
*vcpu
, u8 reg_num
, u32 mode
);
45 int __attribute_const__
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
;
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 struct kvm_cpu_context
{
92 struct vfp_hard_struct vfp
;
95 typedef struct kvm_cpu_context kvm_cpu_context_t
;
97 struct kvm_vcpu_arch
{
98 struct kvm_cpu_context ctxt
;
100 struct kvm_regs regs
;
102 int target
; /* Processor target */
103 DECLARE_BITMAP(features
, KVM_VCPU_MAX_FEATURES
);
105 /* System control coprocessor (cp15) */
106 u32 cp15
[NR_CP15_REGS
];
108 /* The CPU type we expose to the VM */
111 /* HYP trapping configuration */
114 /* Interrupt related fields */
115 u32 irq_lines
; /* IRQ and FIQ levels */
117 /* Exception Information */
118 struct kvm_vcpu_fault_info fault
;
120 /* Host FP context */
121 kvm_cpu_context_t
*host_cpu_context
;
124 struct vgic_cpu vgic_cpu
;
125 struct arch_timer_cpu timer_cpu
;
128 * Anything that is not used directly from assembly code goes
132 /* vcpu power-off state */
135 /* Don't run the guest (internal implementation need) */
138 /* IO related fields */
139 struct kvm_decode mmio_decode
;
141 /* Cache some mmu pages needed inside spinlock regions */
142 struct kvm_mmu_memory_cache mmu_page_cache
;
144 /* Detect first run of a vcpu */
149 u32 remote_tlb_flush
;
152 struct kvm_vcpu_stat
{
153 u32 halt_successful_poll
;
154 u32 halt_attempted_poll
;
160 u64 mmio_exit_kernel
;
164 int kvm_vcpu_preferred_target(struct kvm_vcpu_init
*init
);
165 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
166 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
167 int kvm_arm_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
168 int kvm_arm_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
169 u64
kvm_call_hyp(void *hypfn
, ...);
170 void force_vm_exit(const cpumask_t
*mask
);
172 #define KVM_ARCH_WANT_MMU_NOTIFIER
173 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
174 int kvm_unmap_hva_range(struct kvm
*kvm
,
175 unsigned long start
, unsigned long end
);
176 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
178 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
179 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
180 int kvm_age_hva(struct kvm
*kvm
, unsigned long start
, unsigned long end
);
181 int kvm_test_age_hva(struct kvm
*kvm
, unsigned long hva
);
183 /* We do not have shadow page tables, hence the empty hooks */
184 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm
*kvm
,
185 unsigned long address
)
189 struct kvm_vcpu
*kvm_arm_get_running_vcpu(void);
190 struct kvm_vcpu __percpu
**kvm_get_running_vcpus(void);
192 int kvm_arm_copy_coproc_indices(struct kvm_vcpu
*vcpu
, u64 __user
*uindices
);
193 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu
*vcpu
);
194 int kvm_arm_coproc_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
195 int kvm_arm_coproc_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
197 int handle_exit(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
198 int exception_index
);
200 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr
,
202 unsigned long hyp_stack_ptr
,
203 unsigned long vector_ptr
)
206 * Call initialization code, and switch to the full blown HYP
207 * code. The init code doesn't need to preserve these
208 * registers as r0-r3 are already callee saved according to
210 * Note that we slightly misuse the prototype by casing the
211 * stack pointer to a void *.
213 * We don't have enough registers to perform the full init in
214 * one go. Install the boot PGD first, and then install the
215 * runtime PGD, stack pointer and vectors. The PGDs are always
216 * passed as the third argument, in order to be passed into
217 * r2-r3 to the init code (yes, this is compliant with the
221 kvm_call_hyp(NULL
, 0, boot_pgd_ptr
);
223 kvm_call_hyp((void*)hyp_stack_ptr
, vector_ptr
, pgd_ptr
);
226 static inline void __cpu_init_stage2(void)
230 static inline int kvm_arch_dev_ioctl_check_extension(long ext
)
235 int kvm_perf_init(void);
236 int kvm_perf_teardown(void);
238 void kvm_mmu_wp_memory_region(struct kvm
*kvm
, int slot
);
240 struct kvm_vcpu
*kvm_mpidr_to_vcpu(struct kvm
*kvm
, unsigned long mpidr
);
242 static inline void kvm_arch_hardware_disable(void) {}
243 static inline void kvm_arch_hardware_unsetup(void) {}
244 static inline void kvm_arch_sync_events(struct kvm
*kvm
) {}
245 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
) {}
246 static inline void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
) {}
248 static inline void kvm_arm_init_debug(void) {}
249 static inline void kvm_arm_setup_debug(struct kvm_vcpu
*vcpu
) {}
250 static inline void kvm_arm_clear_debug(struct kvm_vcpu
*vcpu
) {}
251 static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu
*vcpu
) {}
253 #endif /* __ARM_KVM_HOST_H__ */