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_VCPU_EXIT (8 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
49 u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
50 int __attribute_const__ kvm_target_cpu(void);
51 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
52 void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
55 /* VTTBR value associated with below pgd and vmid */
58 /* The last vcpu id that ran on each physical CPU */
59 int __percpu *last_vcpu_ran;
62 * Anything that is not used directly from assembly code goes
66 /* The VMID generation used for the virt. memory system */
70 /* Stage-2 page table */
73 /* Interrupt controller */
74 struct vgic_dist vgic;
78 #define KVM_NR_MEM_OBJS 40
81 * We don't want allocation failures within the mmu code, so we preallocate
82 * enough memory for a single page fault in a cache.
84 struct kvm_mmu_memory_cache {
86 void *objects[KVM_NR_MEM_OBJS];
89 struct kvm_vcpu_fault_info {
90 u32 hsr; /* Hyp Syndrome Register */
91 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
92 u32 hpfar; /* Hyp IPA Fault Address Register */
96 * 0 is reserved as an invalid value.
97 * Order should be kept in sync with the save/restore code.
101 c0_MPIDR, /* MultiProcessor ID Register */
102 c0_CSSELR, /* Cache Size Selection Register */
103 c1_SCTLR, /* System Control Register */
104 c1_ACTLR, /* Auxiliary Control Register */
105 c1_CPACR, /* Coprocessor Access Control */
106 c2_TTBR0, /* Translation Table Base Register 0 */
107 c2_TTBR0_high, /* TTBR0 top 32 bits */
108 c2_TTBR1, /* Translation Table Base Register 1 */
109 c2_TTBR1_high, /* TTBR1 top 32 bits */
110 c2_TTBCR, /* Translation Table Base Control R. */
111 c3_DACR, /* Domain Access Control Register */
112 c5_DFSR, /* Data Fault Status Register */
113 c5_IFSR, /* Instruction Fault Status Register */
114 c5_ADFSR, /* Auxilary Data Fault Status R */
115 c5_AIFSR, /* Auxilary Instrunction Fault Status R */
116 c6_DFAR, /* Data Fault Address Register */
117 c6_IFAR, /* Instruction Fault Address Register */
118 c7_PAR, /* Physical Address Register */
119 c7_PAR_high, /* PAR top 32 bits */
120 c9_L2CTLR, /* Cortex A15/A7 L2 Control Register */
121 c10_PRRR, /* Primary Region Remap Register */
122 c10_NMRR, /* Normal Memory Remap Register */
123 c12_VBAR, /* Vector Base Address Register */
124 c13_CID, /* Context ID Register */
125 c13_TID_URW, /* Thread ID, User R/W */
126 c13_TID_URO, /* Thread ID, User R/O */
127 c13_TID_PRIV, /* Thread ID, Privileged */
128 c14_CNTKCTL, /* Timer Control Register (PL1) */
129 c10_AMAIR0, /* Auxilary Memory Attribute Indirection Reg0 */
130 c10_AMAIR1, /* Auxilary Memory Attribute Indirection Reg1 */
131 NR_CP15_REGS /* Number of regs (incl. invalid) */
134 struct kvm_cpu_context {
135 struct kvm_regs gp_regs;
136 struct vfp_hard_struct vfp;
137 u32 cp15[NR_CP15_REGS];
140 typedef struct kvm_cpu_context kvm_cpu_context_t;
142 struct kvm_vcpu_arch {
143 struct kvm_cpu_context ctxt;
145 int target; /* Processor target */
146 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
148 /* The CPU type we expose to the VM */
151 /* HYP trapping configuration */
154 /* Interrupt related fields */
155 u32 irq_lines; /* IRQ and FIQ levels */
157 /* Exception Information */
158 struct kvm_vcpu_fault_info fault;
160 /* Host FP context */
161 kvm_cpu_context_t *host_cpu_context;
164 struct vgic_cpu vgic_cpu;
165 struct arch_timer_cpu timer_cpu;
168 * Anything that is not used directly from assembly code goes
172 /* vcpu power-off state */
175 /* Don't run the guest (internal implementation need) */
178 /* IO related fields */
179 struct kvm_decode mmio_decode;
181 /* Cache some mmu pages needed inside spinlock regions */
182 struct kvm_mmu_memory_cache mmu_page_cache;
184 /* Detect first run of a vcpu */
189 ulong remote_tlb_flush;
192 struct kvm_vcpu_stat {
193 u64 halt_successful_poll;
194 u64 halt_attempted_poll;
195 u64 halt_poll_invalid;
201 u64 mmio_exit_kernel;
205 #define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
207 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
208 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
209 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
210 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
211 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
212 unsigned long kvm_call_hyp(void *hypfn, ...);
213 void force_vm_exit(const cpumask_t *mask);
215 #define KVM_ARCH_WANT_MMU_NOTIFIER
216 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
217 int kvm_unmap_hva_range(struct kvm *kvm,
218 unsigned long start, unsigned long end);
219 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
221 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
222 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
223 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
224 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
226 /* We do not have shadow page tables, hence the empty hooks */
227 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
228 unsigned long address)
232 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
233 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
234 void kvm_arm_halt_guest(struct kvm *kvm);
235 void kvm_arm_resume_guest(struct kvm *kvm);
236 void kvm_arm_halt_vcpu(struct kvm_vcpu *vcpu);
237 void kvm_arm_resume_vcpu(struct kvm_vcpu *vcpu);
239 int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
240 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
241 int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
242 int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
244 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
245 int exception_index);
247 static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
248 unsigned long hyp_stack_ptr,
249 unsigned long vector_ptr)
252 * Call initialization code, and switch to the full blown HYP
253 * code. The init code doesn't need to preserve these
254 * registers as r0-r3 are already callee saved according to
256 * Note that we slightly misuse the prototype by casting the
257 * stack pointer to a void *.
259 * The PGDs are always passed as the third argument, in order
260 * to be passed into r2-r3 to the init code (yes, this is
261 * compliant with the PCS!).
264 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
267 static inline void __cpu_init_stage2(void)
269 kvm_call_hyp(__init_stage2_translation);
272 static inline int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
277 int kvm_perf_init(void);
278 int kvm_perf_teardown(void);
280 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
282 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
284 static inline void kvm_arch_hardware_unsetup(void) {}
285 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
286 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
287 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
288 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
290 static inline void kvm_arm_init_debug(void) {}
291 static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
292 static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {}
293 static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {}
294 static inline int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
295 struct kvm_device_attr *attr)
299 static inline int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
300 struct kvm_device_attr *attr)
304 static inline int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
305 struct kvm_device_attr *attr)
310 #endif /* __ARM_KVM_HOST_H__ */