1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright © 2019 Oracle and/or its affiliates. All rights reserved.
* Copyright © 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* KVM Xen emulation
*/
#ifndef __ARCH_X86_KVM_XEN_H__
#define __ARCH_X86_KVM_XEN_H__
#include <asm/xen/hypervisor.h>
#ifdef CONFIG_KVM_XEN
#include <linux/jump_label_ratelimit.h>
extern struct static_key_false_deferred kvm_xen_enabled;
int __kvm_xen_has_interrupt(struct kvm_vcpu *vcpu);
void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu);
void kvm_xen_inject_vcpu_vector(struct kvm_vcpu *vcpu);
int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data);
int kvm_xen_hvm_set_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data);
int kvm_xen_hvm_evtchn_send(struct kvm *kvm, struct kvm_irq_routing_xen_evtchn *evt);
int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
void kvm_xen_init_vm(struct kvm *kvm);
void kvm_xen_destroy_vm(struct kvm *kvm);
void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu);
void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu);
int kvm_xen_set_evtchn_fast(struct kvm_xen_evtchn *xe,
struct kvm *kvm);
int kvm_xen_setup_evtchn(struct kvm *kvm,
struct kvm_kernel_irq_routing_entry *e,
const struct kvm_irq_routing_entry *ue);
void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu);
static inline void kvm_xen_sw_enable_lapic(struct kvm_vcpu *vcpu)
{
/*
* The local APIC is being enabled. If the per-vCPU upcall vector is
* set and the vCPU's evtchn_upcall_pending flag is set, inject the
* interrupt.
*/
if (static_branch_unlikely(&kvm_xen_enabled.key) &&
vcpu->arch.xen.vcpu_info_cache.active &&
vcpu->arch.xen.upcall_vector && __kvm_xen_has_interrupt(vcpu))
kvm_xen_inject_vcpu_vector(vcpu);
}
static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
{
return static_branch_unlikely(&kvm_xen_enabled.key) &&
kvm->arch.xen_hvm_config.msr;
}
static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
{
return static_branch_unlikely(&kvm_xen_enabled.key) &&
(kvm->arch.xen_hvm_config.flags &
KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL);
}
static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
{
if (static_branch_unlikely(&kvm_xen_enabled.key) &&
vcpu->arch.xen.vcpu_info_cache.active &&
vcpu->kvm->arch.xen.upcall_vector)
return __kvm_xen_has_interrupt(vcpu);
return 0;
}
static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
{
return static_branch_unlikely(&kvm_xen_enabled.key) &&
vcpu->arch.xen.evtchn_pending_sel;
}
static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
{
return !!vcpu->arch.xen.timer_virq;
}
static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
{
if (kvm_xen_hypercall_enabled(vcpu->kvm) && kvm_xen_timer_enabled(vcpu))
return atomic_read(&vcpu->arch.xen.timer_pending);
return 0;
}
void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu);
#else
static inline int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
{
return 1;
}
static inline void kvm_xen_init_vm(struct kvm *kvm)
{
}
static inline void kvm_xen_destroy_vm(struct kvm *kvm)
{
}
static inline void kvm_xen_init_vcpu(struct kvm_vcpu *vcpu)
{
}
static inline void kvm_xen_destroy_vcpu(struct kvm_vcpu *vcpu)
{
}
static inline void kvm_xen_sw_enable_lapic(struct kvm_vcpu *vcpu)
{
}
static inline bool kvm_xen_msr_enabled(struct kvm *kvm)
{
return false;
}
static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
{
return false;
}
static inline int kvm_xen_has_interrupt(struct kvm_vcpu *vcpu)
{
return 0;
}
static inline void kvm_xen_inject_pending_events(struct kvm_vcpu *vcpu)
{
}
static inline bool kvm_xen_has_pending_events(struct kvm_vcpu *vcpu)
{
return false;
}
static inline int kvm_xen_has_pending_timer(struct kvm_vcpu *vcpu)
{
return 0;
}
static inline void kvm_xen_inject_timer_irqs(struct kvm_vcpu *vcpu)
{
}
static inline bool kvm_xen_timer_enabled(struct kvm_vcpu *vcpu)
{
return false;
}
static inline void kvm_xen_update_tsc_info(struct kvm_vcpu *vcpu)
{
}
#endif
int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
#include <asm/pvclock-abi.h>
#include <asm/xen/interface.h>
#include <xen/interface/vcpu.h>
void kvm_xen_update_runstate(struct kvm_vcpu *vcpu, int state);
static inline void kvm_xen_runstate_set_running(struct kvm_vcpu *vcpu)
{
kvm_xen_update_runstate(vcpu, RUNSTATE_running);
}
static inline void kvm_xen_runstate_set_preempted(struct kvm_vcpu *vcpu)
{
/*
* If the vCPU wasn't preempted but took a normal exit for
* some reason (hypercalls, I/O, etc.), that is accounted as
* still RUNSTATE_running, as the VMM is still operating on
* behalf of the vCPU. Only if the VMM does actually block
* does it need to enter RUNSTATE_blocked.
*/
if (WARN_ON_ONCE(!vcpu->preempted))
return;
kvm_xen_update_runstate(vcpu, RUNSTATE_runnable);
}
/* 32-bit compatibility definitions, also used natively in 32-bit build */
struct compat_arch_vcpu_info {
unsigned int cr2;
unsigned int pad[5];
};
struct compat_vcpu_info {
uint8_t evtchn_upcall_pending;
uint8_t evtchn_upcall_mask;
uint16_t pad;
uint32_t evtchn_pending_sel;
struct compat_arch_vcpu_info arch;
struct pvclock_vcpu_time_info time;
}; /* 64 bytes (x86) */
struct compat_arch_shared_info {
unsigned int max_pfn;
unsigned int pfn_to_mfn_frame_list_list;
unsigned int nmi_reason;
unsigned int p2m_cr3;
unsigned int p2m_vaddr;
unsigned int p2m_generation;
uint32_t wc_sec_hi;
};
struct compat_shared_info {
struct compat_vcpu_info vcpu_info[MAX_VIRT_CPUS];
uint32_t evtchn_pending[32];
uint32_t evtchn_mask[32];
struct pvclock_wall_clock wc;
struct compat_arch_shared_info arch;
};
#define COMPAT_EVTCHN_2L_NR_CHANNELS (8 * \
sizeof_field(struct compat_shared_info, \
evtchn_pending))
struct compat_vcpu_runstate_info {
int state;
uint64_t state_entry_time;
uint64_t time[4];
} __attribute__((packed));
struct compat_sched_poll {
/* This is actually a guest virtual address which points to ports. */
uint32_t ports;
unsigned int nr_ports;
uint64_t timeout;
};
#endif /* __ARCH_X86_KVM_XEN_H__ */
|
