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
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __KVM_X86_VMX_EVMCS_H
#define __KVM_X86_VMX_EVMCS_H
#include <linux/jump_label.h>
#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
#include <asm/vmx.h>
#include "capabilities.h"
#include "vmcs.h"
#include "vmcs12.h"
struct vmcs_config;
DECLARE_STATIC_KEY_FALSE(enable_evmcs);
#define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
#define KVM_EVMCS_VERSION 1
/*
* Enlightened VMCSv1 doesn't support these:
*
* POSTED_INTR_NV = 0x00000002,
* GUEST_INTR_STATUS = 0x00000810,
* APIC_ACCESS_ADDR = 0x00002014,
* POSTED_INTR_DESC_ADDR = 0x00002016,
* EOI_EXIT_BITMAP0 = 0x0000201c,
* EOI_EXIT_BITMAP1 = 0x0000201e,
* EOI_EXIT_BITMAP2 = 0x00002020,
* EOI_EXIT_BITMAP3 = 0x00002022,
* GUEST_PML_INDEX = 0x00000812,
* PML_ADDRESS = 0x0000200e,
* VM_FUNCTION_CONTROL = 0x00002018,
* EPTP_LIST_ADDRESS = 0x00002024,
* VMREAD_BITMAP = 0x00002026,
* VMWRITE_BITMAP = 0x00002028,
*
* TSC_MULTIPLIER = 0x00002032,
* PLE_GAP = 0x00004020,
* PLE_WINDOW = 0x00004022,
* VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
* GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808,
* HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04,
*
* Currently unsupported in KVM:
* GUEST_IA32_RTIT_CTL = 0x00002814,
*/
#define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \
PIN_BASED_VMX_PREEMPTION_TIMER)
#define EVMCS1_UNSUPPORTED_2NDEXEC \
(SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | \
SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | \
SECONDARY_EXEC_APIC_REGISTER_VIRT | \
SECONDARY_EXEC_ENABLE_PML | \
SECONDARY_EXEC_ENABLE_VMFUNC | \
SECONDARY_EXEC_SHADOW_VMCS | \
SECONDARY_EXEC_TSC_SCALING | \
SECONDARY_EXEC_PAUSE_LOOP_EXITING)
#define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
#define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
#define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING)
#if IS_ENABLED(CONFIG_HYPERV)
struct evmcs_field {
u16 offset;
u16 clean_field;
};
extern const struct evmcs_field vmcs_field_to_evmcs_1[];
extern const unsigned int nr_evmcs_1_fields;
#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
static __always_inline int get_evmcs_offset(unsigned long field,
u16 *clean_field)
{
unsigned int index = ROL16(field, 6);
const struct evmcs_field *evmcs_field;
if (unlikely(index >= nr_evmcs_1_fields)) {
WARN_ONCE(1, "KVM: accessing unsupported EVMCS field %lx\n",
field);
return -ENOENT;
}
evmcs_field = &vmcs_field_to_evmcs_1[index];
if (clean_field)
*clean_field = evmcs_field->clean_field;
return evmcs_field->offset;
}
#undef ROL16
static inline void evmcs_write64(unsigned long field, u64 value)
{
u16 clean_field;
int offset = get_evmcs_offset(field, &clean_field);
if (offset < 0)
return;
*(u64 *)((char *)current_evmcs + offset) = value;
current_evmcs->hv_clean_fields &= ~clean_field;
}
static inline void evmcs_write32(unsigned long field, u32 value)
{
u16 clean_field;
int offset = get_evmcs_offset(field, &clean_field);
if (offset < 0)
return;
*(u32 *)((char *)current_evmcs + offset) = value;
current_evmcs->hv_clean_fields &= ~clean_field;
}
static inline void evmcs_write16(unsigned long field, u16 value)
{
u16 clean_field;
int offset = get_evmcs_offset(field, &clean_field);
if (offset < 0)
return;
*(u16 *)((char *)current_evmcs + offset) = value;
current_evmcs->hv_clean_fields &= ~clean_field;
}
static inline u64 evmcs_read64(unsigned long field)
{
int offset = get_evmcs_offset(field, NULL);
if (offset < 0)
return 0;
return *(u64 *)((char *)current_evmcs + offset);
}
static inline u32 evmcs_read32(unsigned long field)
{
int offset = get_evmcs_offset(field, NULL);
if (offset < 0)
return 0;
return *(u32 *)((char *)current_evmcs + offset);
}
static inline u16 evmcs_read16(unsigned long field)
{
int offset = get_evmcs_offset(field, NULL);
if (offset < 0)
return 0;
return *(u16 *)((char *)current_evmcs + offset);
}
static inline void evmcs_touch_msr_bitmap(void)
{
if (unlikely(!current_evmcs))
return;
if (current_evmcs->hv_enlightenments_control.msr_bitmap)
current_evmcs->hv_clean_fields &=
~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
}
static inline void evmcs_load(u64 phys_addr)
{
struct hv_vp_assist_page *vp_ap =
hv_get_vp_assist_page(smp_processor_id());
if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall)
vp_ap->nested_control.features.directhypercall = 1;
vp_ap->current_nested_vmcs = phys_addr;
vp_ap->enlighten_vmentry = 1;
}
__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
#else /* !IS_ENABLED(CONFIG_HYPERV) */
static inline void evmcs_write64(unsigned long field, u64 value) {}
static inline void evmcs_write32(unsigned long field, u32 value) {}
static inline void evmcs_write16(unsigned long field, u16 value) {}
static inline u64 evmcs_read64(unsigned long field) { return 0; }
static inline u32 evmcs_read32(unsigned long field) { return 0; }
static inline u16 evmcs_read16(unsigned long field) { return 0; }
static inline void evmcs_load(u64 phys_addr) {}
static inline void evmcs_touch_msr_bitmap(void) {}
#endif /* IS_ENABLED(CONFIG_HYPERV) */
enum nested_evmptrld_status {
EVMPTRLD_DISABLED,
EVMPTRLD_SUCCEEDED,
EVMPTRLD_VMFAIL,
EVMPTRLD_ERROR,
};
bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa);
uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
int nested_enable_evmcs(struct kvm_vcpu *vcpu,
uint16_t *vmcs_version);
void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata);
int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
#endif /* __KVM_X86_VMX_EVMCS_H */
|
