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_HAVE_ONE_REG
34 #define KVM_HALT_POLL_NS_DEFAULT 500000
36 #define KVM_VCPU_MAX_FEATURES 2
38 #include <kvm/arm_vgic.h>
41 #ifdef CONFIG_ARM_GIC_V3
42 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS
44 #define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS
47 #define KVM_REQ_SLEEP \
48 KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
49 #define KVM_REQ_IRQ_PENDING KVM_ARCH_REQ(1)
51 u32
*kvm_vcpu_reg(struct kvm_vcpu
*vcpu
, u8 reg_num
, u32 mode
);
52 int __attribute_const__
kvm_target_cpu(void);
53 int kvm_reset_vcpu(struct kvm_vcpu
*vcpu
);
54 void kvm_reset_coprocs(struct kvm_vcpu
*vcpu
);
57 /* VTTBR value associated with below pgd and vmid */
60 /* The last vcpu id that ran on each physical CPU */
61 int __percpu
*last_vcpu_ran
;
64 * Anything that is not used directly from assembly code goes
68 /* The VMID generation used for the virt. memory system */
72 /* Stage-2 page table */
75 /* Interrupt controller */
76 struct vgic_dist vgic
;
80 #define KVM_NR_MEM_OBJS 40
83 * We don't want allocation failures within the mmu code, so we preallocate
84 * enough memory for a single page fault in a cache.
86 struct kvm_mmu_memory_cache
{
88 void *objects
[KVM_NR_MEM_OBJS
];
91 struct kvm_vcpu_fault_info
{
92 u32 hsr
; /* Hyp Syndrome Register */
93 u32 hxfar
; /* Hyp Data/Inst. Fault Address Register */
94 u32 hpfar
; /* Hyp IPA Fault Address Register */
98 * 0 is reserved as an invalid value.
99 * Order should be kept in sync with the save/restore code.
103 c0_MPIDR
, /* MultiProcessor ID Register */
104 c0_CSSELR
, /* Cache Size Selection Register */
105 c1_SCTLR
, /* System Control Register */
106 c1_ACTLR
, /* Auxiliary Control Register */
107 c1_CPACR
, /* Coprocessor Access Control */
108 c2_TTBR0
, /* Translation Table Base Register 0 */
109 c2_TTBR0_high
, /* TTBR0 top 32 bits */
110 c2_TTBR1
, /* Translation Table Base Register 1 */
111 c2_TTBR1_high
, /* TTBR1 top 32 bits */
112 c2_TTBCR
, /* Translation Table Base Control R. */
113 c3_DACR
, /* Domain Access Control Register */
114 c5_DFSR
, /* Data Fault Status Register */
115 c5_IFSR
, /* Instruction Fault Status Register */
116 c5_ADFSR
, /* Auxilary Data Fault Status R */
117 c5_AIFSR
, /* Auxilary Instrunction Fault Status R */
118 c6_DFAR
, /* Data Fault Address Register */
119 c6_IFAR
, /* Instruction Fault Address Register */
120 c7_PAR
, /* Physical Address Register */
121 c7_PAR_high
, /* PAR top 32 bits */
122 c9_L2CTLR
, /* Cortex A15/A7 L2 Control Register */
123 c10_PRRR
, /* Primary Region Remap Register */
124 c10_NMRR
, /* Normal Memory Remap Register */
125 c12_VBAR
, /* Vector Base Address Register */
126 c13_CID
, /* Context ID Register */
127 c13_TID_URW
, /* Thread ID, User R/W */
128 c13_TID_URO
, /* Thread ID, User R/O */
129 c13_TID_PRIV
, /* Thread ID, Privileged */
130 c14_CNTKCTL
, /* Timer Control Register (PL1) */
131 c10_AMAIR0
, /* Auxilary Memory Attribute Indirection Reg0 */
132 c10_AMAIR1
, /* Auxilary Memory Attribute Indirection Reg1 */
133 NR_CP15_REGS
/* Number of regs (incl. invalid) */
136 struct kvm_cpu_context
{
137 struct kvm_regs gp_regs
;
138 struct vfp_hard_struct vfp
;
139 u32 cp15
[NR_CP15_REGS
];
142 typedef struct kvm_cpu_context kvm_cpu_context_t
;
144 struct kvm_vcpu_arch
{
145 struct kvm_cpu_context ctxt
;
147 int target
; /* Processor target */
148 DECLARE_BITMAP(features
, KVM_VCPU_MAX_FEATURES
);
150 /* The CPU type we expose to the VM */
153 /* HYP trapping configuration */
156 /* Interrupt related fields */
157 u32 irq_lines
; /* IRQ and FIQ levels */
159 /* Exception Information */
160 struct kvm_vcpu_fault_info fault
;
162 /* Host FP context */
163 kvm_cpu_context_t
*host_cpu_context
;
166 struct vgic_cpu vgic_cpu
;
167 struct arch_timer_cpu timer_cpu
;
170 * Anything that is not used directly from assembly code goes
174 /* vcpu power-off state */
177 /* Don't run the guest (internal implementation need) */
180 /* IO related fields */
181 struct kvm_decode mmio_decode
;
183 /* Cache some mmu pages needed inside spinlock regions */
184 struct kvm_mmu_memory_cache mmu_page_cache
;
186 /* Detect first run of a vcpu */
191 ulong remote_tlb_flush
;
194 struct kvm_vcpu_stat
{
195 u64 halt_successful_poll
;
196 u64 halt_attempted_poll
;
197 u64 halt_poll_invalid
;
203 u64 mmio_exit_kernel
;
207 #define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
209 int kvm_vcpu_preferred_target(struct kvm_vcpu_init
*init
);
210 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
211 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
212 int kvm_arm_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
213 int kvm_arm_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*reg
);
214 unsigned long kvm_call_hyp(void *hypfn
, ...);
215 void force_vm_exit(const cpumask_t
*mask
);
217 #define KVM_ARCH_WANT_MMU_NOTIFIER
218 int kvm_unmap_hva(struct kvm
*kvm
, unsigned long hva
);
219 int kvm_unmap_hva_range(struct kvm
*kvm
,
220 unsigned long start
, unsigned long end
);
221 void kvm_set_spte_hva(struct kvm
*kvm
, unsigned long hva
, pte_t pte
);
223 unsigned long kvm_arm_num_regs(struct kvm_vcpu
*vcpu
);
224 int kvm_arm_copy_reg_indices(struct kvm_vcpu
*vcpu
, u64 __user
*indices
);
225 int kvm_age_hva(struct kvm
*kvm
, unsigned long start
, unsigned long end
);
226 int kvm_test_age_hva(struct kvm
*kvm
, unsigned long hva
);
228 struct kvm_vcpu
*kvm_arm_get_running_vcpu(void);
229 struct kvm_vcpu __percpu
**kvm_get_running_vcpus(void);
230 void kvm_arm_halt_guest(struct kvm
*kvm
);
231 void kvm_arm_resume_guest(struct kvm
*kvm
);
233 int kvm_arm_copy_coproc_indices(struct kvm_vcpu
*vcpu
, u64 __user
*uindices
);
234 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu
*vcpu
);
235 int kvm_arm_coproc_get_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
236 int kvm_arm_coproc_set_reg(struct kvm_vcpu
*vcpu
, const struct kvm_one_reg
*);
238 int handle_exit(struct kvm_vcpu
*vcpu
, struct kvm_run
*run
,
239 int exception_index
);
241 static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr
,
242 unsigned long hyp_stack_ptr
,
243 unsigned long vector_ptr
)
246 * Call initialization code, and switch to the full blown HYP
247 * code. The init code doesn't need to preserve these
248 * registers as r0-r3 are already callee saved according to
250 * Note that we slightly misuse the prototype by casting the
251 * stack pointer to a void *.
253 * The PGDs are always passed as the third argument, in order
254 * to be passed into r2-r3 to the init code (yes, this is
255 * compliant with the PCS!).
258 kvm_call_hyp((void*)hyp_stack_ptr
, vector_ptr
, pgd_ptr
);
261 static inline void __cpu_init_stage2(void)
263 kvm_call_hyp(__init_stage2_translation
);
266 static inline int kvm_arch_dev_ioctl_check_extension(struct kvm
*kvm
, long ext
)
271 int kvm_perf_init(void);
272 int kvm_perf_teardown(void);
274 void kvm_mmu_wp_memory_region(struct kvm
*kvm
, int slot
);
276 struct kvm_vcpu
*kvm_mpidr_to_vcpu(struct kvm
*kvm
, unsigned long mpidr
);
278 static inline void kvm_arch_hardware_unsetup(void) {}
279 static inline void kvm_arch_sync_events(struct kvm
*kvm
) {}
280 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu
*vcpu
) {}
281 static inline void kvm_arch_sched_in(struct kvm_vcpu
*vcpu
, int cpu
) {}
282 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu
*vcpu
) {}
284 static inline void kvm_arm_init_debug(void) {}
285 static inline void kvm_arm_setup_debug(struct kvm_vcpu
*vcpu
) {}
286 static inline void kvm_arm_clear_debug(struct kvm_vcpu
*vcpu
) {}
287 static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu
*vcpu
) {}
288 static inline bool kvm_arm_handle_step_debug(struct kvm_vcpu
*vcpu
,
294 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu
*vcpu
,
295 struct kvm_device_attr
*attr
);
296 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu
*vcpu
,
297 struct kvm_device_attr
*attr
);
298 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu
*vcpu
,
299 struct kvm_device_attr
*attr
);
301 /* All host FP/SIMD state is restored on guest exit, so nothing to save: */
302 static inline void kvm_fpsimd_flush_cpu_state(void) {}
304 static inline void kvm_arm_vhe_guest_enter(void) {}
305 static inline void kvm_arm_vhe_guest_exit(void) {}
307 static inline bool kvm_arm_harden_branch_predictor(void)
309 /* No way to detect it yet, pretend it is not there. */
313 #endif /* __ARM_KVM_HOST_H__ */