tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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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 1
40
41/* We don't currently support large pages. */
42#define KVM_HPAGE_GFN_SHIFT(x) 0
43#define KVM_NR_PAGE_SIZES 1
44#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
45
46#include <kvm/arm_vgic.h>
47
48struct kvm_vcpu;
49u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode);
50int kvm_target_cpu(void);
51int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
52void kvm_reset_coprocs(struct kvm_vcpu *vcpu);
53
54struct kvm_arch {
55 /* VTTBR value associated with below pgd and vmid */
56 u64 vttbr;
57
58 /* Timer */
59 struct arch_timer_kvm timer;
60
61 /*
62 * Anything that is not used directly from assembly code goes
63 * here.
64 */
65
66 /* The VMID generation used for the virt. memory system */
67 u64 vmid_gen;
68 u32 vmid;
69
70 /* Stage-2 page table */
71 pgd_t *pgd;
72
73 /* Interrupt controller */
74 struct vgic_dist vgic;
75};
76
77#define KVM_NR_MEM_OBJS 40
78
79/*
80 * We don't want allocation failures within the mmu code, so we preallocate
81 * enough memory for a single page fault in a cache.
82 */
83struct kvm_mmu_memory_cache {
84 int nobjs;
85 void *objects[KVM_NR_MEM_OBJS];
86};
87
88struct kvm_vcpu_fault_info {
89 u32 hsr; /* Hyp Syndrome Register */
90 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */
91 u32 hpfar; /* Hyp IPA Fault Address Register */
92 u32 hyp_pc; /* PC when exception was taken from Hyp mode */
93};
94
95typedef struct vfp_hard_struct kvm_cpu_context_t;
96
97struct kvm_vcpu_arch {
98 struct kvm_regs regs;
99
100 int target; /* Processor target */
101 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
102
103 /* System control coprocessor (cp15) */
104 u32 cp15[NR_CP15_REGS];
105
106 /* The CPU type we expose to the VM */
107 u32 midr;
108
109 /* Exception Information */
110 struct kvm_vcpu_fault_info fault;
111
112 /* Floating point registers (VFP and Advanced SIMD/NEON) */
113 struct vfp_hard_struct vfp_guest;
114
115 /* Host FP context */
116 kvm_cpu_context_t *host_cpu_context;
117
118 /* VGIC state */
119 struct vgic_cpu vgic_cpu;
120 struct arch_timer_cpu timer_cpu;
121
122 /*
123 * Anything that is not used directly from assembly code goes
124 * here.
125 */
126 /* dcache set/way operation pending */
127 int last_pcpu;
128 cpumask_t require_dcache_flush;
129
130 /* Don't run the guest on this vcpu */
131 bool pause;
132
133 /* IO related fields */
134 struct kvm_decode mmio_decode;
135
136 /* Interrupt related fields */
137 u32 irq_lines; /* IRQ and FIQ levels */
138
139 /* Cache some mmu pages needed inside spinlock regions */
140 struct kvm_mmu_memory_cache mmu_page_cache;
141
142 /* Detect first run of a vcpu */
143 bool has_run_once;
144};
145
146struct kvm_vm_stat {
147 u32 remote_tlb_flush;
148};
149
150struct kvm_vcpu_stat {
151 u32 halt_wakeup;
152};
153
154struct kvm_vcpu_init;
155int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
156 const struct kvm_vcpu_init *init);
157unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
158int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
159struct kvm_one_reg;
160int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
161int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
162u64 kvm_call_hyp(void *hypfn, ...);
163void force_vm_exit(const cpumask_t *mask);
164
165#define KVM_ARCH_WANT_MMU_NOTIFIER
166struct kvm;
167int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
168int kvm_unmap_hva_range(struct kvm *kvm,
169 unsigned long start, unsigned long end);
170void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
171
172unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
173int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
174
175/* We do not have shadow page tables, hence the empty hooks */
176static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva)
177{
178 return 0;
179}
180
181static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
182{
183 return 0;
184}
185
186struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
187struct kvm_vcpu __percpu **kvm_get_running_vcpus(void);
188
189int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices);
190unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu);
191struct kvm_one_reg;
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
229int kvm_perf_init(void);
230int kvm_perf_teardown(void);
231
232#endif /* __ARM_KVM_HOST_H__ */