1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KVM_X86_VMX_EVMCS_H
3 #define __KVM_X86_VMX_EVMCS_H
4
5 #include <linux/jump_label.h>
6
7 #include <asm/hyperv-tlfs.h>
8 #include <asm/mshyperv.h>
9 #include <asm/vmx.h>
10
11 #include "capabilities.h"
12 #include "vmcs.h"
13 #include "vmcs12.h"
14
15 struct vmcs_config;
16
17 DECLARE_STATIC_KEY_FALSE(enable_evmcs);
18
19 #define current_evmcs ((struct hv_enlightened_vmcs *)this_cpu_read(current_vmcs))
20
21 #define KVM_EVMCS_VERSION 1
22
23 /*
24 * Enlightened VMCSv1 doesn't support these:
25 *
26 * POSTED_INTR_NV = 0x00000002,
27 * GUEST_INTR_STATUS = 0x00000810,
28 * APIC_ACCESS_ADDR = 0x00002014,
29 * POSTED_INTR_DESC_ADDR = 0x00002016,
30 * EOI_EXIT_BITMAP0 = 0x0000201c,
31 * EOI_EXIT_BITMAP1 = 0x0000201e,
32 * EOI_EXIT_BITMAP2 = 0x00002020,
33 * EOI_EXIT_BITMAP3 = 0x00002022,
34 * GUEST_PML_INDEX = 0x00000812,
35 * PML_ADDRESS = 0x0000200e,
36 * VM_FUNCTION_CONTROL = 0x00002018,
37 * EPTP_LIST_ADDRESS = 0x00002024,
38 * VMREAD_BITMAP = 0x00002026,
39 * VMWRITE_BITMAP = 0x00002028,
40 *
41 * TSC_MULTIPLIER = 0x00002032,
42 * PLE_GAP = 0x00004020,
43 * PLE_WINDOW = 0x00004022,
44 * VMX_PREEMPTION_TIMER_VALUE = 0x0000482E,
45 * GUEST_IA32_PERF_GLOBAL_CTRL = 0x00002808,
46 * HOST_IA32_PERF_GLOBAL_CTRL = 0x00002c04,
47 *
48 * Currently unsupported in KVM:
49 * GUEST_IA32_RTIT_CTL = 0x00002814,
50 */
51 #define EVMCS1_UNSUPPORTED_PINCTRL (PIN_BASED_POSTED_INTR | \
52 PIN_BASED_VMX_PREEMPTION_TIMER)
53 #define EVMCS1_UNSUPPORTED_2NDEXEC \
54 (SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY | \
55 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES | \
56 SECONDARY_EXEC_APIC_REGISTER_VIRT | \
57 SECONDARY_EXEC_ENABLE_PML | \
58 SECONDARY_EXEC_ENABLE_VMFUNC | \
59 SECONDARY_EXEC_SHADOW_VMCS | \
60 SECONDARY_EXEC_TSC_SCALING | \
61 SECONDARY_EXEC_PAUSE_LOOP_EXITING)
62 #define EVMCS1_UNSUPPORTED_VMEXIT_CTRL (VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
63 #define EVMCS1_UNSUPPORTED_VMENTRY_CTRL (VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
64 #define EVMCS1_UNSUPPORTED_VMFUNC (VMX_VMFUNC_EPTP_SWITCHING)
65
66 #if IS_ENABLED(CONFIG_HYPERV)
67
68 struct evmcs_field {
69 u16 offset;
70 u16 clean_field;
71 };
72
73 extern const struct evmcs_field vmcs_field_to_evmcs_1[];
74 extern const unsigned int nr_evmcs_1_fields;
75
get_evmcs_offset(unsigned long field,u16 * clean_field)76 static __always_inline int get_evmcs_offset(unsigned long field,
77 u16 *clean_field)
78 {
79 unsigned int index = ROL16(field, 6);
80 const struct evmcs_field *evmcs_field;
81
82 if (unlikely(index >= nr_evmcs_1_fields)) {
83 WARN_ONCE(1, "KVM: accessing unsupported EVMCS field %lx\n",
84 field);
85 return -ENOENT;
86 }
87
88 evmcs_field = &vmcs_field_to_evmcs_1[index];
89
90 if (clean_field)
91 *clean_field = evmcs_field->clean_field;
92
93 return evmcs_field->offset;
94 }
95
evmcs_write64(unsigned long field,u64 value)96 static inline void evmcs_write64(unsigned long field, u64 value)
97 {
98 u16 clean_field;
99 int offset = get_evmcs_offset(field, &clean_field);
100
101 if (offset < 0)
102 return;
103
104 *(u64 *)((char *)current_evmcs + offset) = value;
105
106 current_evmcs->hv_clean_fields &= ~clean_field;
107 }
108
evmcs_write32(unsigned long field,u32 value)109 static inline void evmcs_write32(unsigned long field, u32 value)
110 {
111 u16 clean_field;
112 int offset = get_evmcs_offset(field, &clean_field);
113
114 if (offset < 0)
115 return;
116
117 *(u32 *)((char *)current_evmcs + offset) = value;
118 current_evmcs->hv_clean_fields &= ~clean_field;
119 }
120
evmcs_write16(unsigned long field,u16 value)121 static inline void evmcs_write16(unsigned long field, u16 value)
122 {
123 u16 clean_field;
124 int offset = get_evmcs_offset(field, &clean_field);
125
126 if (offset < 0)
127 return;
128
129 *(u16 *)((char *)current_evmcs + offset) = value;
130 current_evmcs->hv_clean_fields &= ~clean_field;
131 }
132
evmcs_read64(unsigned long field)133 static inline u64 evmcs_read64(unsigned long field)
134 {
135 int offset = get_evmcs_offset(field, NULL);
136
137 if (offset < 0)
138 return 0;
139
140 return *(u64 *)((char *)current_evmcs + offset);
141 }
142
evmcs_read32(unsigned long field)143 static inline u32 evmcs_read32(unsigned long field)
144 {
145 int offset = get_evmcs_offset(field, NULL);
146
147 if (offset < 0)
148 return 0;
149
150 return *(u32 *)((char *)current_evmcs + offset);
151 }
152
evmcs_read16(unsigned long field)153 static inline u16 evmcs_read16(unsigned long field)
154 {
155 int offset = get_evmcs_offset(field, NULL);
156
157 if (offset < 0)
158 return 0;
159
160 return *(u16 *)((char *)current_evmcs + offset);
161 }
162
evmcs_touch_msr_bitmap(void)163 static inline void evmcs_touch_msr_bitmap(void)
164 {
165 if (unlikely(!current_evmcs))
166 return;
167
168 if (current_evmcs->hv_enlightenments_control.msr_bitmap)
169 current_evmcs->hv_clean_fields &=
170 ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
171 }
172
evmcs_load(u64 phys_addr)173 static inline void evmcs_load(u64 phys_addr)
174 {
175 struct hv_vp_assist_page *vp_ap =
176 hv_get_vp_assist_page(smp_processor_id());
177
178 if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall)
179 vp_ap->nested_control.features.directhypercall = 1;
180 vp_ap->current_nested_vmcs = phys_addr;
181 vp_ap->enlighten_vmentry = 1;
182 }
183
184 __init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
185 #else /* !IS_ENABLED(CONFIG_HYPERV) */
evmcs_write64(unsigned long field,u64 value)186 static inline void evmcs_write64(unsigned long field, u64 value) {}
evmcs_write32(unsigned long field,u32 value)187 static inline void evmcs_write32(unsigned long field, u32 value) {}
evmcs_write16(unsigned long field,u16 value)188 static inline void evmcs_write16(unsigned long field, u16 value) {}
evmcs_read64(unsigned long field)189 static inline u64 evmcs_read64(unsigned long field) { return 0; }
evmcs_read32(unsigned long field)190 static inline u32 evmcs_read32(unsigned long field) { return 0; }
evmcs_read16(unsigned long field)191 static inline u16 evmcs_read16(unsigned long field) { return 0; }
evmcs_load(u64 phys_addr)192 static inline void evmcs_load(u64 phys_addr) {}
evmcs_touch_msr_bitmap(void)193 static inline void evmcs_touch_msr_bitmap(void) {}
194 #endif /* IS_ENABLED(CONFIG_HYPERV) */
195
196 #define EVMPTR_INVALID (-1ULL)
197 #define EVMPTR_MAP_PENDING (-2ULL)
198
evmptr_is_valid(u64 evmptr)199 static inline bool evmptr_is_valid(u64 evmptr)
200 {
201 return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
202 }
203
204 enum nested_evmptrld_status {
205 EVMPTRLD_DISABLED,
206 EVMPTRLD_SUCCEEDED,
207 EVMPTRLD_VMFAIL,
208 EVMPTRLD_ERROR,
209 };
210
211 bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa);
212 uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
213 int nested_enable_evmcs(struct kvm_vcpu *vcpu,
214 uint16_t *vmcs_version);
215 void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata);
216 int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
217
218 #endif /* __KVM_X86_VMX_EVMCS_H */
219
