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1/*
2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
4 *
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.
8 *
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.
13 *
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.
17 */
18
19#ifndef __ARM_KVM_HOST_H__
20#define __ARM_KVM_HOST_H__
21
22#include <asm/kvm.h>
23#include <asm/kvm_asm.h>
24#include <asm/kvm_mmio.h>
25#include <asm/fpstate.h>
26#include <kvm/arm_arch_timer.h>
27
28#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
29#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
30#else
31#define KVM_MAX_VCPUS 0
32#endif
33
34#define KVM_USER_MEM_SLOTS 32
35#define KVM_PRIVATE_MEM_SLOTS 4
36#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
37#define KVM_HAVE_ONE_REG
38
39#define KVM_VCPU_MAX_FEATURES 1
40
41#include <kvm/arm_vgic.h>
42
43struct kvm_vcpu;
44u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
45int kvm_target_cpu(void);
46int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
47void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
48
49struct kvm_arch {
50 /* VTTBR value associated with below pgd and vmid */
51 u64 vttbr;
52
53 /* Timer */
54 struct arch_timer_kvm timer;
55
56 /*
57 * Anything that is not used directly from assembly code goes
58 * here.
59 */
60
61 /* The VMID generation used for the virt. memory system */
62 u64 vmid_gen;
63 u32 vmid;
64
65 /* Stage-2 page table */
66 pgd_t *pgd;
67
68 /* Interrupt controller */
69 struct vgic_dist vgic;
70};
71
72#define KVM_NR_MEM_OBJS 40
73
74/*
75 * We don't want allocation failures within the mmu code, so we preallocate
76 * enough memory for a single page fault in a cache.
77 */
78struct kvm_mmu_memory_cache {
79 int nobjs;
80 void *objects[KVM_NR_MEM_OBJS];
81};
82
83struct kvm_vcpu_fault_info {
84 u32 hsr; /* Hyp Syndrome Register */
85 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
86 u32 hpfar; /* Hyp IPA Fault Address Register */
87 u32 hyp_pc; /* PC when exception was taken from Hyp mode */
88};
89
90typedef struct vfp_hard_struct kvm_cpu_context_t;
91
92struct kvm_vcpu_arch {
93 struct kvm_regs regs;
94
95 int target; /* Processor target */
96 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
97
98 /* System control coprocessor (cp15) */
99 u32 cp15[NR_CP15_REGS];
100
101 /* The CPU type we expose to the VM */
102 u32 midr;
103
104 /* HYP trapping configuration */
105 u32 hcr;
106
107 /* Interrupt related fields */
108 u32 irq_lines; /* IRQ and FIQ levels */
109
110 /* Exception Information */
111 struct kvm_vcpu_fault_info fault;
112
113 /* Floating point registers (VFP and Advanced SIMD/NEON) */
114 struct vfp_hard_struct vfp_guest;
115
116 /* Host FP context */
117 kvm_cpu_context_t *host_cpu_context;
118
119 /* VGIC state */
120 struct vgic_cpu vgic_cpu;
121 struct arch_timer_cpu timer_cpu;
122
123 /*
124 * Anything that is not used directly from assembly code goes
125 * here.
126 */
127 /* dcache set/way operation pending */
128 int last_pcpu;
129 cpumask_t require_dcache_flush;
130
131 /* Don't run the guest on this vcpu */
132 bool pause;
133
134 /* IO related fields */
135 struct kvm_decode mmio_decode;
136
137 /* Cache some mmu pages needed inside spinlock regions */
138 struct kvm_mmu_memory_cache mmu_page_cache;
139
140 /* Detect first run of a vcpu */
141 bool has_run_once;
142};
143
144struct kvm_vm_stat {
145 u32 remote_tlb_flush;
146};
147
148struct kvm_vcpu_stat {
149 u32 halt_wakeup;
150};
151
152struct kvm_vcpu_init;
153int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
154 const struct kvm_vcpu_init *init);
155int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
156unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
157int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
158struct kvm_one_reg;
159int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
160int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
161u64 kvm_call_hyp(void *hypfn, ...);
162void force_vm_exit(const cpumask_t *mask);
163
164#define KVM_ARCH_WANT_MMU_NOTIFIER
165struct kvm;
166int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
167int kvm_unmap_hva_range(struct kvm *kvm,
168 unsigned long start, unsigned long end);
169void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
170
171unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
172int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
173
174/* We do not have shadow page tables, hence the empty hooks */
175static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
176{
177 return 0;
178}
179
180static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
181{
182 return 0;
183}
184
185struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
186struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
187
188int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
189unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
190struct kvm_one_reg;
191int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
192int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
193
194int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
195 int exception_index);
196
197static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
198 phys_addr_t pgd_ptr,
199 unsigned long hyp_stack_ptr,
200 unsigned long vector_ptr)
201{
202 /*
203 * Call initialization code, and switch to the full blown HYP
204 * code. The init code doesn't need to preserve these
205 * registers as r0-r3 are already callee saved according to
206 * the AAPCS.
207 * Note that we slightly misuse the prototype by casing the
208 * stack pointer to a void *.
209 *
210 * We don't have enough registers to perform the full init in
211 * one go. Install the boot PGD first, and then install the
212 * runtime PGD, stack pointer and vectors. The PGDs are always
213 * passed as the third argument, in order to be passed into
214 * r2-r3 to the init code (yes, this is compliant with the
215 * PCS!).
216 */
217
218 kvm_call_hyp(NULL, 0, boot_pgd_ptr);
219
220 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
221}
222
223static inline int kvm_arch_dev_ioctl_check_extension(long ext)
224{
225 return 0;
226}
227
228int kvm_perf_init(void);
229int kvm_perf_teardown(void);
230
231u64 kvm_arm_timer_get_reg(struct kvm_vcpu *, u64 regid);
232int kvm_arm_timer_set_reg(struct kvm_vcpu *, u64 regid, u64 value);
233
234#endif /* __ARM_KVM_HOST_H__ */
1/*
2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
4 *
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.
8 *
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.
13 *
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.
17 */
18
19#ifndef __ARM_KVM_HOST_H__
20#define __ARM_KVM_HOST_H__
21
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>
29
30#define __KVM_HAVE_ARCH_INTC_INITIALIZED
31
32#define KVM_USER_MEM_SLOTS 32
33#define KVM_HAVE_ONE_REG
34#define KVM_HALT_POLL_NS_DEFAULT 500000
35
36#define KVM_VCPU_MAX_FEATURES 2
37
38#include <kvm/arm_vgic.h>
39
40
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
46
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)
50
51DECLARE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
52
53u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
54int __attribute_const__ kvm_target_cpu(void);
55int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
56void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
57
58struct kvm_arch {
59 /* VTTBR value associated with below pgd and vmid */
60 u64 vttbr;
61
62 /* The last vcpu id that ran on each physical CPU */
63 int __percpu *last_vcpu_ran;
64
65 /*
66 * Anything that is not used directly from assembly code goes
67 * here.
68 */
69
70 /* The VMID generation used for the virt. memory system */
71 u64 vmid_gen;
72 u32 vmid;
73
74 /* Stage-2 page table */
75 pgd_t *pgd;
76
77 /* Interrupt controller */
78 struct vgic_dist vgic;
79 int max_vcpus;
80
81 /* Mandated version of PSCI */
82 u32 psci_version;
83};
84
85#define KVM_NR_MEM_OBJS 40
86
87/*
88 * We don't want allocation failures within the mmu code, so we preallocate
89 * enough memory for a single page fault in a cache.
90 */
91struct kvm_mmu_memory_cache {
92 int nobjs;
93 void *objects[KVM_NR_MEM_OBJS];
94};
95
96struct kvm_vcpu_fault_info {
97 u32 hsr; /* Hyp Syndrome Register */
98 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
99 u32 hpfar; /* Hyp IPA Fault Address Register */
100};
101
102/*
103 * 0 is reserved as an invalid value.
104 * Order should be kept in sync with the save/restore code.
105 */
106enum vcpu_sysreg {
107 __INVALID_SYSREG__,
108 c0_MPIDR, /* MultiProcessor ID Register */
109 c0_CSSELR, /* Cache Size Selection Register */
110 c1_SCTLR, /* System Control Register */
111 c1_ACTLR, /* Auxiliary Control Register */
112 c1_CPACR, /* Coprocessor Access Control */
113 c2_TTBR0, /* Translation Table Base Register 0 */
114 c2_TTBR0_high, /* TTBR0 top 32 bits */
115 c2_TTBR1, /* Translation Table Base Register 1 */
116 c2_TTBR1_high, /* TTBR1 top 32 bits */
117 c2_TTBCR, /* Translation Table Base Control R. */
118 c3_DACR, /* Domain Access Control Register */
119 c5_DFSR, /* Data Fault Status Register */
120 c5_IFSR, /* Instruction Fault Status Register */
121 c5_ADFSR, /* Auxilary Data Fault Status R */
122 c5_AIFSR, /* Auxilary Instrunction Fault Status R */
123 c6_DFAR, /* Data Fault Address Register */
124 c6_IFAR, /* Instruction Fault Address Register */
125 c7_PAR, /* Physical Address Register */
126 c7_PAR_high, /* PAR top 32 bits */
127 c9_L2CTLR, /* Cortex A15/A7 L2 Control Register */
128 c10_PRRR, /* Primary Region Remap Register */
129 c10_NMRR, /* Normal Memory Remap Register */
130 c12_VBAR, /* Vector Base Address Register */
131 c13_CID, /* Context ID Register */
132 c13_TID_URW, /* Thread ID, User R/W */
133 c13_TID_URO, /* Thread ID, User R/O */
134 c13_TID_PRIV, /* Thread ID, Privileged */
135 c14_CNTKCTL, /* Timer Control Register (PL1) */
136 c10_AMAIR0, /* Auxilary Memory Attribute Indirection Reg0 */
137 c10_AMAIR1, /* Auxilary Memory Attribute Indirection Reg1 */
138 NR_CP15_REGS /* Number of regs (incl. invalid) */
139};
140
141struct kvm_cpu_context {
142 struct kvm_regs gp_regs;
143 struct vfp_hard_struct vfp;
144 u32 cp15[NR_CP15_REGS];
145};
146
147typedef struct kvm_cpu_context kvm_cpu_context_t;
148
149struct kvm_vcpu_arch {
150 struct kvm_cpu_context ctxt;
151
152 int target; /* Processor target */
153 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
154
155 /* The CPU type we expose to the VM */
156 u32 midr;
157
158 /* HYP trapping configuration */
159 u32 hcr;
160
161 /* Exception Information */
162 struct kvm_vcpu_fault_info fault;
163
164 /* Host FP context */
165 kvm_cpu_context_t *host_cpu_context;
166
167 /* VGIC state */
168 struct vgic_cpu vgic_cpu;
169 struct arch_timer_cpu timer_cpu;
170
171 /*
172 * Anything that is not used directly from assembly code goes
173 * here.
174 */
175
176 /* vcpu power-off state */
177 bool power_off;
178
179 /* Don't run the guest (internal implementation need) */
180 bool pause;
181
182 /* IO related fields */
183 struct kvm_decode mmio_decode;
184
185 /* Cache some mmu pages needed inside spinlock regions */
186 struct kvm_mmu_memory_cache mmu_page_cache;
187
188 /* Detect first run of a vcpu */
189 bool has_run_once;
190};
191
192struct kvm_vm_stat {
193 ulong remote_tlb_flush;
194};
195
196struct 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;
207};
208
209#define vcpu_cp15(v,r) (v)->arch.ctxt.cp15[r]
210
211int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
212unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
213int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
214int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
215int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
216unsigned long kvm_call_hyp(void *hypfn, ...);
217void force_vm_exit(const cpumask_t *mask);
218
219#define KVM_ARCH_WANT_MMU_NOTIFIER
220int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
221int kvm_unmap_hva_range(struct kvm *kvm,
222 unsigned long start, unsigned long end);
223void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
224
225unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
226int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
227int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
228int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
229
230struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
231struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
232void kvm_arm_halt_guest(struct kvm *kvm);
233void kvm_arm_resume_guest(struct kvm *kvm);
234
235int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
236unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
237int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
238int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
239
240int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
241 int exception_index);
242
243static inline void handle_exit_early(struct kvm_vcpu *vcpu, struct kvm_run *run,
244 int exception_index) {}
245
246static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr,
247 unsigned long hyp_stack_ptr,
248 unsigned long vector_ptr)
249{
250 /*
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 *.
257
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!).
261 */
262
263 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
264}
265
266static inline void __cpu_init_stage2(void)
267{
268 kvm_call_hyp(__init_stage2_translation);
269}
270
271static inline int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext)
272{
273 return 0;
274}
275
276int kvm_perf_init(void);
277int kvm_perf_teardown(void);
278
279void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
280
281struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
282
283static inline void kvm_arch_hardware_unsetup(void) {}
284static inline void kvm_arch_sync_events(struct kvm *kvm) {}
285static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
286static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
287static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
288
289static inline void kvm_arm_init_debug(void) {}
290static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {}
291static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {}
292static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {}
293static inline bool kvm_arm_handle_step_debug(struct kvm_vcpu *vcpu,
294 struct kvm_run *run)
295{
296 return false;
297}
298
299int kvm_arm_vcpu_arch_set_attr(struct kvm_vcpu *vcpu,
300 struct kvm_device_attr *attr);
301int kvm_arm_vcpu_arch_get_attr(struct kvm_vcpu *vcpu,
302 struct kvm_device_attr *attr);
303int kvm_arm_vcpu_arch_has_attr(struct kvm_vcpu *vcpu,
304 struct kvm_device_attr *attr);
305
306/* All host FP/SIMD state is restored on guest exit, so nothing to save: */
307static inline void kvm_fpsimd_flush_cpu_state(void) {}
308
309static inline void kvm_arm_vhe_guest_enter(void) {}
310static inline void kvm_arm_vhe_guest_exit(void) {}
311
312static inline bool kvm_arm_harden_branch_predictor(void)
313{
314 /* No way to detect it yet, pretend it is not there. */
315 return false;
316}
317
318static inline void kvm_vcpu_load_sysregs(struct kvm_vcpu *vcpu) {}
319static inline void kvm_vcpu_put_sysregs(struct kvm_vcpu *vcpu) {}
320
321#endif /* __ARM_KVM_HOST_H__ */