tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
31#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
32#else
33#define KVM_MAX_VCPUS 0
34#endif
35
36#define KVM_USER_MEM_SLOTS 32
37#define KVM_PRIVATE_MEM_SLOTS 4
38#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
39#define KVM_HAVE_ONE_REG
40
41#define KVM_VCPU_MAX_FEATURES 2
42
43#include <kvm/arm_vgic.h>
44
45u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
46int __attribute_const__ kvm_target_cpu(void);
47int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
48void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
49
50struct kvm_arch {
51 /* VTTBR value associated with below pgd and vmid */
52 u64 vttbr;
53
54 /* Timer */
55 struct arch_timer_kvm timer;
56
57 /*
58 * Anything that is not used directly from assembly code goes
59 * here.
60 */
61
62 /* The VMID generation used for the virt. memory system */
63 u64 vmid_gen;
64 u32 vmid;
65
66 /* Stage-2 page table */
67 pgd_t *pgd;
68
69 /* Interrupt controller */
70 struct vgic_dist vgic;
71};
72
73#define KVM_NR_MEM_OBJS 40
74
75/*
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.
78 */
79struct kvm_mmu_memory_cache {
80 int nobjs;
81 void *objects[KVM_NR_MEM_OBJS];
82};
83
84struct 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 */
88 u32 hyp_pc; /* PC when exception was taken from Hyp mode */
89};
90
91typedef struct vfp_hard_struct kvm_cpu_context_t;
92
93struct kvm_vcpu_arch {
94 struct kvm_regs regs;
95
96 int target; /* Processor target */
97 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
98
99 /* System control coprocessor (cp15) */
100 u32 cp15[NR_CP15_REGS];
101
102 /* The CPU type we expose to the VM */
103 u32 midr;
104
105 /* HYP trapping configuration */
106 u32 hcr;
107
108 /* Interrupt related fields */
109 u32 irq_lines; /* IRQ and FIQ levels */
110
111 /* Exception Information */
112 struct kvm_vcpu_fault_info fault;
113
114 /* Floating point registers (VFP and Advanced SIMD/NEON) */
115 struct vfp_hard_struct vfp_guest;
116
117 /* Host FP context */
118 kvm_cpu_context_t *host_cpu_context;
119
120 /* VGIC state */
121 struct vgic_cpu vgic_cpu;
122 struct arch_timer_cpu timer_cpu;
123
124 /*
125 * Anything that is not used directly from assembly code goes
126 * here.
127 */
128 /* dcache set/way operation pending */
129 int last_pcpu;
130 cpumask_t require_dcache_flush;
131
132 /* Don't run the guest on this vcpu */
133 bool pause;
134
135 /* IO related fields */
136 struct kvm_decode mmio_decode;
137
138 /* Cache some mmu pages needed inside spinlock regions */
139 struct kvm_mmu_memory_cache mmu_page_cache;
140
141 /* Detect first run of a vcpu */
142 bool has_run_once;
143};
144
145struct kvm_vm_stat {
146 u32 remote_tlb_flush;
147};
148
149struct kvm_vcpu_stat {
150 u32 halt_wakeup;
151};
152
153int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
154unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
155int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
156int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
157int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
158u64 kvm_call_hyp(void *hypfn, ...);
159void force_vm_exit(const cpumask_t *mask);
160
161#define KVM_ARCH_WANT_MMU_NOTIFIER
162int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
163int kvm_unmap_hva_range(struct kvm *kvm,
164 unsigned long start, unsigned long end);
165void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
166
167unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
168int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
169
170/* We do not have shadow page tables, hence the empty hooks */
171static inline int kvm_age_hva(struct kvm *kvm, unsigned long start,
172 unsigned long end)
173{
174 return 0;
175}
176
177static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
178{
179 return 0;
180}
181
182static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
183 unsigned long address)
184{
185}
186
187struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
188struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
189
190int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
191unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
192int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
193int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *);
194
195int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
196 int exception_index);
197
198static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
199 phys_addr_t pgd_ptr,
200 unsigned long hyp_stack_ptr,
201 unsigned long vector_ptr)
202{
203 /*
204 * Call initialization code, and switch to the full blown HYP
205 * code. The init code doesn't need to preserve these
206 * registers as r0-r3 are already callee saved according to
207 * the AAPCS.
208 * Note that we slightly misuse the prototype by casing the
209 * stack pointer to a void *.
210 *
211 * We don't have enough registers to perform the full init in
212 * one go. Install the boot PGD first, and then install the
213 * runtime PGD, stack pointer and vectors. The PGDs are always
214 * passed as the third argument, in order to be passed into
215 * r2-r3 to the init code (yes, this is compliant with the
216 * PCS!).
217 */
218
219 kvm_call_hyp(NULL, 0, boot_pgd_ptr);
220
221 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
222}
223
224static inline int kvm_arch_dev_ioctl_check_extension(long ext)
225{
226 return 0;
227}
228
229static inline void vgic_arch_setup(const struct vgic_params *vgic)
230{
231 BUG_ON(vgic->type != VGIC_V2);
232}
233
234int kvm_perf_init(void);
235int kvm_perf_teardown(void);
236
237static inline void kvm_arch_hardware_disable(void) {}
238static inline void kvm_arch_hardware_unsetup(void) {}
239static inline void kvm_arch_sync_events(struct kvm *kvm) {}
240static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
241static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
242
243#endif /* __ARM_KVM_HOST_H__ */