Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / arch / arm / include / asm / kvm_host.h
blob248b930563e5a68ed870632290b0b0cad7158cb2
1 /*
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>
24 #include <asm/kvm.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
43 #else
44 #define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS
45 #endif
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 DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
53 u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
54 int __attribute_const__ kvm_target_cpu(void);
55 int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
56 void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
58 struct kvm_arch {
59 /* VTTBR value associated with below pgd and vmid */
60 u64 vttbr;
62 /* The last vcpu id that ran on each physical CPU */
63 int __percpu *last_vcpu_ran;
66 * Anything that is not used directly from assembly code goes
67 * here.
70 /* The VMID generation used for the virt. memory system */
71 u64 vmid_gen;
72 u32 vmid;
74 /* Stage-2 page table */
75 pgd_t *pgd;
77 /* Interrupt controller */
78 struct vgic_dist vgic;
79 int max_vcpus;
82 #define KVM_NR_MEM_OBJS 40
85 * We don't want allocation failures within the mmu code, so we preallocate
86 * enough memory for a single page fault in a cache.
88 struct kvm_mmu_memory_cache {
89 int nobjs;
90 void *objects[KVM_NR_MEM_OBJS];
93 struct kvm_vcpu_fault_info {
94 u32 hsr; /* Hyp Syndrome Register */
95 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
96 u32 hpfar; /* Hyp IPA Fault Address Register */
100 * 0 is reserved as an invalid value.
101 * Order should be kept in sync with the save/restore code.
103 enum vcpu_sysreg {
104 __INVALID_SYSREG__,
105 c0_MPIDR, /* MultiProcessor ID Register */
106 c0_CSSELR, /* Cache Size Selection Register */
107 c1_SCTLR, /* System Control Register */
108 c1_ACTLR, /* Auxiliary Control Register */
109 c1_CPACR, /* Coprocessor Access Control */
110 c2_TTBR0, /* Translation Table Base Register 0 */
111 c2_TTBR0_high, /* TTBR0 top 32 bits */
112 c2_TTBR1, /* Translation Table Base Register 1 */
113 c2_TTBR1_high, /* TTBR1 top 32 bits */
114 c2_TTBCR, /* Translation Table Base Control R. */
115 c3_DACR, /* Domain Access Control Register */
116 c5_DFSR, /* Data Fault Status Register */
117 c5_IFSR, /* Instruction Fault Status Register */
118 c5_ADFSR, /* Auxilary Data Fault Status R */
119 c5_AIFSR, /* Auxilary Instrunction Fault Status R */
120 c6_DFAR, /* Data Fault Address Register */
121 c6_IFAR, /* Instruction Fault Address Register */
122 c7_PAR, /* Physical Address Register */
123 c7_PAR_high, /* PAR top 32 bits */
124 c9_L2CTLR, /* Cortex A15/A7 L2 Control Register */
125 c10_PRRR, /* Primary Region Remap Register */
126 c10_NMRR, /* Normal Memory Remap Register */
127 c12_VBAR, /* Vector Base Address Register */
128 c13_CID, /* Context ID Register */
129 c13_TID_URW, /* Thread ID, User R/W */
130 c13_TID_URO, /* Thread ID, User R/O */
131 c13_TID_PRIV, /* Thread ID, Privileged */
132 c14_CNTKCTL, /* Timer Control Register (PL1) */
133 c10_AMAIR0, /* Auxilary Memory Attribute Indirection Reg0 */
134 c10_AMAIR1, /* Auxilary Memory Attribute Indirection Reg1 */
135 NR_CP15_REGS /* Number of regs (incl. invalid) */
138 struct kvm_cpu_context {
139 struct kvm_regs gp_regs;
140 struct vfp_hard_struct vfp;
141 u32 cp15[NR_CP15_REGS];
144 typedef struct kvm_cpu_context kvm_cpu_context_t;
146 struct kvm_vcpu_arch {
147 struct kvm_cpu_context ctxt;
149 int target; /* Processor target */
150 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
152 /* The CPU type we expose to the VM */
153 u32 midr;
155 /* HYP trapping configuration */
156 u32 hcr;
158 /* Interrupt related fields */
159 u32 irq_lines; /* IRQ and FIQ levels */
161 /* Exception Information */
162 struct kvm_vcpu_fault_info fault;
164 /* Host FP context */
165 kvm_cpu_context_t *host_cpu_context;
167 /* VGIC state */
168 struct vgic_cpu vgic_cpu;
169 struct arch_timer_cpu timer_cpu;
172 * Anything that is not used directly from assembly code goes
173 * here.
176 /* vcpu power-off state */
177 bool power_off;
179 /* Don't run the guest (internal implementation need) */
180 bool pause;
182 /* IO related fields */
183 struct kvm_decode mmio_decode;
185 /* Cache some mmu pages needed inside spinlock regions */
186 struct kvm_mmu_memory_cache mmu_page_cache;
188 /* Detect first run of a vcpu */
189 bool has_run_once;
192 struct kvm_vm_stat {
193 ulong remote_tlb_flush;
196 struct kvm_vcpu_stat {
197 u64 halt_successful_poll;
198 u64 halt_attempted_poll;
199 u64 halt_poll_invalid;
200 u64 halt_wakeup;
201 u64 hvc_exit_stat;
202 u64 wfe_exit_stat;
203 u64 wfi_exit_stat;
204 u64 mmio_exit_user;
205 u64 mmio_exit_kernel;
206 u64 exits;
209 #define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
211 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
212 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
213 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
214 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
215 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
216 unsigned long kvm_call_hyp(void *hypfn, ...);
217 void force_vm_exit(const cpumask_t *mask);
219 #define KVM_ARCH_WANT_MMU_NOTIFIER
220 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
221 int kvm_unmap_hva_range(struct kvm *kvm,
222 unsigned long start, unsigned long end);
223 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
225 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
226 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
227 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
228 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
230 struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
231 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
232 void kvm_arm_halt_guest(struct kvm *kvm);
233 void kvm_arm_resume_guest(struct kvm *kvm);
235 int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
236 unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
237 int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
238 int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
240 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
241 int exception_index);
243 static inline void handle_exit_early(struct kvm_vcpu *vcpu, struct kvm_run *run,
244 int exception_index) {}
246 static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
247 unsigned long hyp_stack_ptr,
248 unsigned long vector_ptr)
251 * Call initialization code, and switch to the full blown HYP
252 * code. The init code doesn't need to preserve these
253 * registers as r0-r3 are already callee saved according to
254 * the AAPCS.
255 * Note that we slightly misuse the prototype by casting the
256 * stack pointer to a void *.
258 * The PGDs are always passed as the third argument, in order
259 * to be passed into r2-r3 to the init code (yes, this is
260 * compliant with the PCS!).
263 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
266 static inline void __cpu_init_stage2(void)
268 kvm_call_hyp(__init_stage2_translation);
271 static inline int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
273 return 0;
276 int kvm_perf_init(void);
277 int kvm_perf_teardown(void);
279 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
281 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
283 static inline void kvm_arch_hardware_unsetup(void) {}
284 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
285 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
286 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
287 static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
289 static inline void kvm_arm_init_debug(void) {}
290 static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
291 static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {}
292 static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {}
293 static inline bool kvm_arm_handle_step_debug(struct kvm_vcpu *vcpu,
294 struct kvm_run *run)
296 return false;
299 int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
300 struct kvm_device_attr *attr);
301 int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
302 struct kvm_device_attr *attr);
303 int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
304 struct kvm_device_attr *attr);
306 /* All host FP/SIMD state is restored on guest exit, so nothing to save: */
307 static inline void kvm_fpsimd_flush_cpu_state(void) {}
309 static inline void kvm_arm_vhe_guest_enter(void) {}
310 static inline void kvm_arm_vhe_guest_exit(void) {}
312 static inline bool kvm_arm_harden_branch_predictor(void)
314 /* No way to detect it yet, pretend it is not there. */
315 return false;
318 #endif /* __ARM_KVM_HOST_H__ */