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 */
91 * 0 is reserved as an invalid value.
92 * Order should be kept in sync with the save/restore code.
96 c0_MPIDR, /* MultiProcessor ID Register */
97 c0_CSSELR, /* Cache Size Selection Register */
98 c1_SCTLR, /* System Control Register */
99 c1_ACTLR, /* Auxiliary Control Register */
100 c1_CPACR, /* Coprocessor Access Control */
101 c2_TTBR0, /* Translation Table Base Register 0 */
102 c2_TTBR0_high, /* TTBR0 top 32 bits */
103 c2_TTBR1, /* Translation Table Base Register 1 */
104 c2_TTBR1_high, /* TTBR1 top 32 bits */
105 c2_TTBCR, /* Translation Table Base Control R. */
106 c3_DACR, /* Domain Access Control Register */
107 c5_DFSR, /* Data Fault Status Register */
108 c5_IFSR, /* Instruction Fault Status Register */
109 c5_ADFSR, /* Auxilary Data Fault Status R */
110 c5_AIFSR, /* Auxilary Instrunction Fault Status R */
111 c6_DFAR, /* Data Fault Address Register */
112 c6_IFAR, /* Instruction Fault Address Register */
113 c7_PAR, /* Physical Address Register */
114 c7_PAR_high, /* PAR top 32 bits */
115 c9_L2CTLR, /* Cortex A15/A7 L2 Control Register */
116 c10_PRRR, /* Primary Region Remap Register */
117 c10_NMRR, /* Normal Memory Remap Register */
118 c12_VBAR, /* Vector Base Address Register */
119 c13_CID, /* Context ID Register */
120 c13_TID_URW, /* Thread ID, User R/W */
121 c13_TID_URO, /* Thread ID, User R/O */
122 c13_TID_PRIV, /* Thread ID, Privileged */
123 c14_CNTKCTL, /* Timer Control Register (PL1) */
124 c10_AMAIR0, /* Auxilary Memory Attribute Indirection Reg0 */
125 c10_AMAIR1, /* Auxilary Memory Attribute Indirection Reg1 */
126 NR_CP15_REGS /* Number of regs (incl. invalid) */
129 struct kvm_cpu_context {
130 struct kvm_regs gp_regs;
131 struct vfp_hard_struct vfp;
132 u32 cp15[NR_CP15_REGS];
135 typedef struct kvm_cpu_context kvm_cpu_context_t;
137 struct kvm_vcpu_arch {
138 struct kvm_cpu_context ctxt;
140 int target; /* Processor target */
141 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
143 /* The CPU type we expose to the VM */
146 /* HYP trapping configuration */
149 /* Interrupt related fields */
150 u32 irq_lines; /* IRQ and FIQ levels */
152 /* Exception Information */
153 struct kvm_vcpu_fault_info fault;
155 /* Host FP context */
156 kvm_cpu_context_t *host_cpu_context;
159 struct vgic_cpu vgic_cpu;
160 struct arch_timer_cpu timer_cpu;
163 * Anything that is not used directly from assembly code goes
167 /* vcpu power-off state */
170 /* Don't run the guest (internal implementation need) */
173 /* IO related fields */
174 struct kvm_decode mmio_decode;
176 /* Cache some mmu pages needed inside spinlock regions */
177 struct kvm_mmu_memory_cache mmu_page_cache;
179 /* Detect first run of a vcpu */
184 u32 remote_tlb_flush;
187 struct kvm_vcpu_stat {
188 u32 halt_successful_poll;
189 u32 halt_attempted_poll;
190 u32 halt_poll_invalid;
196 u64 mmio_exit_kernel;
200 #define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
202 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
203 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
204 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
205 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
206 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
207 unsigned long kvm_call_hyp(void *hypfn, ...);
208 void force_vm_exit(const cpumask_t *mask);
210 #define KVM_ARCH_WANT_MMU_NOTIFIER
211 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
212 int kvm_unmap_hva_range(struct kvm *kvm,
213 unsigned long start, unsigned long end);
214 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
216 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
217 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
218 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
219 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
221 /* We do not have shadow page tables, hence the empty hooks */
222 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
223 unsigned long address)
227 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
228 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
230 int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
231 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
232 int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
233 int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
235 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
236 int exception_index);
238 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
240 unsigned long hyp_stack_ptr,
241 unsigned long vector_ptr)
244 * Call initialization code, and switch to the full blown HYP
245 * code. The init code doesn't need to preserve these
246 * registers as r0-r3 are already callee saved according to
248 * Note that we slightly misuse the prototype by casing the
249 * stack pointer to a void *.
251 * We don't have enough registers to perform the full init in
252 * one go. Install the boot PGD first, and then install the
253 * runtime PGD, stack pointer and vectors. The PGDs are always
254 * passed as the third argument, in order to be passed into
255 * r2-r3 to the init code (yes, this is compliant with the
259 kvm_call_hyp(NULL, 0, boot_pgd_ptr);
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 int kvm_arch_dev_ioctl_check_extension(long ext)
274 int kvm_perf_init(void);
275 int kvm_perf_teardown(void);
277 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
279 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
281 static inline void kvm_arch_hardware_disable(void) {}
282 static inline void kvm_arch_hardware_unsetup(void) {}
283 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
284 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
285 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
286 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
288 static inline void kvm_arm_init_debug(void) {}
289 static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
290 static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {}
291 static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {}
292 static inline int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
293 struct kvm_device_attr *attr)
297 static inline int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
298 struct kvm_device_attr *attr)
302 static inline int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
303 struct kvm_device_attr *attr)
308 #endif /* __ARM_KVM_HOST_H__ */