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 <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 2
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__ */