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 #define KVM_REQ_VCPU_EXIT 8
46 u32
*kvm_vcpu_reg(struct kvm_vcpu
*vcpu
, u8 reg_num
, u32 mode
);
47 int __attribute_const__
kvm_target_cpu(void);
48 int kvm_reset_vcpu(struct kvm_vcpu
*vcpu
);
49 void kvm_reset_coprocs(struct kvm_vcpu
*vcpu
);
52 /* VTTBR value associated with below pgd and vmid */
56 struct arch_timer_kvm timer
;
59 * Anything that is not used directly from assembly code goes
63 /* The VMID generation used for the virt. memory system */
67 /* Stage-2 page table */
70 /* Interrupt controller */
71 struct vgic_dist vgic
;
75 #define KVM_NR_MEM_OBJS 40
78 * We don't want allocation failures within the mmu code, so we preallocate
79 * enough memory for a single page fault in a cache.
81 struct kvm_mmu_memory_cache
{
83 void *objects
[KVM_NR_MEM_OBJS
];
86 struct kvm_vcpu_fault_info
{
87 u32 hsr
; /* Hyp Syndrome Register */
88 u32 hxfar
; /* Hyp Data/Inst. Fault Address Register */
89 u32 hpfar
; /* Hyp IPA Fault Address Register */
93 * 0 is reserved as an invalid value.
94 * Order should be kept in sync with the save/restore code.
98 c0_MPIDR
, /* MultiProcessor ID Register */
99 c0_CSSELR
, /* Cache Size Selection Register */
100 c1_SCTLR
, /* System Control Register */
101 c1_ACTLR
, /* Auxiliary Control Register */
102 c1_CPACR
, /* Coprocessor Access Control */
103 c2_TTBR0
, /* Translation Table Base Register 0 */
104 c2_TTBR0_high
, /* TTBR0 top 32 bits */
105 c2_TTBR1
, /* Translation Table Base Register 1 */
106 c2_TTBR1_high
, /* TTBR1 top 32 bits */
107 c2_TTBCR
, /* Translation Table Base Control R. */
108 c3_DACR
, /* Domain Access Control Register */
109 c5_DFSR
, /* Data Fault Status Register */
110 c5_IFSR
, /* Instruction Fault Status Register */
111 c5_ADFSR
, /* Auxilary Data Fault Status R */
112 c5_AIFSR
, /* Auxilary Instrunction Fault Status R */
113 c6_DFAR
, /* Data Fault Address Register */
114 c6_IFAR
, /* Instruction Fault Address Register */
115 c7_PAR
, /* Physical Address Register */
116 c7_PAR_high
, /* PAR top 32 bits */
117 c9_L2CTLR
, /* Cortex A15/A7 L2 Control Register */
118 c10_PRRR
, /* Primary Region Remap Register */
119 c10_NMRR
, /* Normal Memory Remap Register */
120 c12_VBAR
, /* Vector Base Address Register */
121 c13_CID
, /* Context ID Register */
122 c13_TID_URW
, /* Thread ID, User R/W */
123 c13_TID_URO
, /* Thread ID, User R/O */
124 c13_TID_PRIV
, /* Thread ID, Privileged */
125 c14_CNTKCTL
, /* Timer Control Register (PL1) */
126 c10_AMAIR0
, /* Auxilary Memory Attribute Indirection Reg0 */
127 c10_AMAIR1
, /* Auxilary Memory Attribute Indirection Reg1 */
128 NR_CP15_REGS
/* Number of regs (incl. invalid) */
131 struct kvm_cpu_context
{
132 struct kvm_regs gp_regs
;
133 struct vfp_hard_struct vfp
;
134 u32 cp15
[NR_CP15_REGS
];
137 typedef struct kvm_cpu_context kvm_cpu_context_t
;
139 struct kvm_vcpu_arch
{
140 struct kvm_cpu_context ctxt
;
142 int target
; /* Processor target */
143 DECLARE_BITMAP(features
, KVM_VCPU_MAX_FEATURES
);
145 /* The CPU type we expose to the VM */
148 /* HYP trapping configuration */
151 /* Interrupt related fields */
152 u32 irq_lines
; /* IRQ and FIQ levels */
154 /* Exception Information */
155 struct kvm_vcpu_fault_info fault
;
157 /* Host FP context */
158 kvm_cpu_context_t
*host_cpu_context
;
161 struct vgic_cpu vgic_cpu
;
162 struct arch_timer_cpu timer_cpu
;
165 * Anything that is not used directly from assembly code goes
169 /* vcpu power-off state */
172 /* Don't run the guest (internal implementation need) */
175 /* IO related fields */
176 struct kvm_decode mmio_decode
;
178 /* Cache some mmu pages needed inside spinlock regions */
179 struct kvm_mmu_memory_cache mmu_page_cache
;
181 /* Detect first run of a vcpu */
186 u32 remote_tlb_flush
;
189 struct kvm_vcpu_stat
{
190 u32 halt_successful_poll
;
191 u32 halt_attempted_poll
;
192 u32 halt_poll_invalid
;
198 u64 mmio_exit_kernel
;
202 #define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
204 int kvm_vcpu_preferred_target(struct kvm_vcpu_init
*init
);
205 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
206 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
207 int kvm_arm_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
208 int kvm_arm_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
209 unsigned long kvm_call_hyp(void *hypfn
, ...);
210 void force_vm_exit(const cpumask_t
*mask
);
212 #define KVM_ARCH_WANT_MMU_NOTIFIER
213 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
214 int kvm_unmap_hva_range(struct kvm
*kvm
,
215 unsigned long start
, unsigned long end
);
216 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
218 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
219 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
220 int kvm_age_hva(struct kvm
*kvm
, unsigned long start
, unsigned long end
);
221 int kvm_test_age_hva(struct kvm
*kvm
, unsigned long hva
);
223 /* We do not have shadow page tables, hence the empty hooks */
224 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm
*kvm
,
225 unsigned long address
)
229 struct kvm_vcpu
*kvm_arm_get_running_vcpu(void);
230 struct kvm_vcpu __percpu
**kvm_get_running_vcpus(void);
231 void kvm_arm_halt_guest(struct kvm
*kvm
);
232 void kvm_arm_resume_guest(struct kvm
*kvm
);
233 void kvm_arm_halt_vcpu(struct kvm_vcpu
*vcpu
);
234 void kvm_arm_resume_vcpu(struct kvm_vcpu
*vcpu
);
236 int kvm_arm_copy_coproc_indices(struct kvm_vcpu
*vcpu
, u64 __user
*uindices
);
237 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu
*vcpu
);
238 int kvm_arm_coproc_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
239 int kvm_arm_coproc_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
241 int handle_exit(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
242 int exception_index
);
244 static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr
,
245 unsigned long hyp_stack_ptr
,
246 unsigned long vector_ptr
)
249 * Call initialization code, and switch to the full blown HYP
250 * code. The init code doesn't need to preserve these
251 * registers as r0-r3 are already callee saved according to
253 * Note that we slightly misuse the prototype by casting the
254 * stack pointer to a void *.
256 * The PGDs are always passed as the third argument, in order
257 * to be passed into r2-r3 to the init code (yes, this is
258 * compliant with the PCS!).
261 kvm_call_hyp((void*)hyp_stack_ptr
, vector_ptr
, pgd_ptr
);
264 static inline void __cpu_init_stage2(void)
266 kvm_call_hyp(__init_stage2_translation
);
269 static inline void __cpu_reset_hyp_mode(unsigned long vector_ptr
,
270 phys_addr_t phys_idmap_start
)
272 kvm_call_hyp((void *)virt_to_idmap(__kvm_hyp_reset
), vector_ptr
);
275 static inline int kvm_arch_dev_ioctl_check_extension(struct kvm
*kvm
, long ext
)
280 int kvm_perf_init(void);
281 int kvm_perf_teardown(void);
283 void kvm_mmu_wp_memory_region(struct kvm
*kvm
, int slot
);
285 struct kvm_vcpu
*kvm_mpidr_to_vcpu(struct kvm
*kvm
, unsigned long mpidr
);
287 static inline void kvm_arch_hardware_unsetup(void) {}
288 static inline void kvm_arch_sync_events(struct kvm
*kvm
) {}
289 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
) {}
290 static inline void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
) {}
291 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu
*vcpu
) {}
293 static inline void kvm_arm_init_debug(void) {}
294 static inline void kvm_arm_setup_debug(struct kvm_vcpu
*vcpu
) {}
295 static inline void kvm_arm_clear_debug(struct kvm_vcpu
*vcpu
) {}
296 static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu
*vcpu
) {}
297 static inline int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu
*vcpu
,
298 struct kvm_device_attr
*attr
)
302 static inline int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu
*vcpu
,
303 struct kvm_device_attr
*attr
)
307 static inline int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu
*vcpu
,
308 struct kvm_device_attr
*attr
)
313 #endif /* __ARM_KVM_HOST_H__ */