1
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
15struct vmcs_config;
16
17DECLARE_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
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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
68struct evmcs_field {
69 u16 offset;
70 u16 clean_field;
71};
72
73extern const struct evmcs_field vmcs_field_to_evmcs_1[];
74extern const unsigned int nr_evmcs_1_fields;
75
76#define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
77
78static __always_inline int get_evmcs_offset(unsigned long field,
79 u16 *clean_field)
80{
81 unsigned int index = ROL16(field, 6);
82 const struct evmcs_field *evmcs_field;
83
84 if (unlikely(index >= nr_evmcs_1_fields)) {
85 WARN_ONCE(1, "KVM: accessing unsupported EVMCS field %lx\n",
86 field);
87 return -ENOENT;
88 }
89
90 evmcs_field = &vmcs_field_to_evmcs_1[index];
91
92 if (clean_field)
93 *clean_field = evmcs_field->clean_field;
94
95 return evmcs_field->offset;
96}
97
98#undef ROL16
99
100static inline void evmcs_write64(unsigned long field, u64 value)
101{
102 u16 clean_field;
103 int offset = get_evmcs_offset(field, &clean_field);
104
105 if (offset < 0)
106 return;
107
108 *(u64 *)((char *)current_evmcs + offset) = value;
109
110 current_evmcs->hv_clean_fields &= ~clean_field;
111}
112
113static inline void evmcs_write32(unsigned long field, u32 value)
114{
115 u16 clean_field;
116 int offset = get_evmcs_offset(field, &clean_field);
117
118 if (offset < 0)
119 return;
120
121 *(u32 *)((char *)current_evmcs + offset) = value;
122 current_evmcs->hv_clean_fields &= ~clean_field;
123}
124
125static inline void evmcs_write16(unsigned long field, u16 value)
126{
127 u16 clean_field;
128 int offset = get_evmcs_offset(field, &clean_field);
129
130 if (offset < 0)
131 return;
132
133 *(u16 *)((char *)current_evmcs + offset) = value;
134 current_evmcs->hv_clean_fields &= ~clean_field;
135}
136
137static inline u64 evmcs_read64(unsigned long field)
138{
139 int offset = get_evmcs_offset(field, NULL);
140
141 if (offset < 0)
142 return 0;
143
144 return *(u64 *)((char *)current_evmcs + offset);
145}
146
147static inline u32 evmcs_read32(unsigned long field)
148{
149 int offset = get_evmcs_offset(field, NULL);
150
151 if (offset < 0)
152 return 0;
153
154 return *(u32 *)((char *)current_evmcs + offset);
155}
156
157static inline u16 evmcs_read16(unsigned long field)
158{
159 int offset = get_evmcs_offset(field, NULL);
160
161 if (offset < 0)
162 return 0;
163
164 return *(u16 *)((char *)current_evmcs + offset);
165}
166
167static inline void evmcs_touch_msr_bitmap(void)
168{
169 if (unlikely(!current_evmcs))
170 return;
171
172 if (current_evmcs->hv_enlightenments_control.msr_bitmap)
173 current_evmcs->hv_clean_fields &=
174 ~HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP;
175}
176
177static inline void evmcs_load(u64 phys_addr)
178{
179 struct hv_vp_assist_page *vp_ap =
180 hv_get_vp_assist_page(smp_processor_id());
181
182 if (current_evmcs->hv_enlightenments_control.nested_flush_hypercall)
183 vp_ap->nested_control.features.directhypercall = 1;
184 vp_ap->current_nested_vmcs = phys_addr;
185 vp_ap->enlighten_vmentry = 1;
186}
187
188__init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf);
189#else
190static inline void evmcs_write64(unsigned long field, u64 value) {}
191static inline void evmcs_write32(unsigned long field, u32 value) {}
192static inline void evmcs_write16(unsigned long field, u16 value) {}
193static inline u64 evmcs_read64(unsigned long field) { return 0; }
194static inline u32 evmcs_read32(unsigned long field) { return 0; }
195static inline u16 evmcs_read16(unsigned long field) { return 0; }
196static inline void evmcs_load(u64 phys_addr) {}
197static inline void evmcs_touch_msr_bitmap(void) {}
198#endif
199
200#define EVMPTR_INVALID (-1ULL)
201#define EVMPTR_MAP_PENDING (-2ULL)
202
203static inline bool evmptr_is_valid(u64 evmptr)
204{
205 return evmptr != EVMPTR_INVALID && evmptr != EVMPTR_MAP_PENDING;
206}
207
208enum nested_evmptrld_status {
209 EVMPTRLD_DISABLED,
210 EVMPTRLD_SUCCEEDED,
211 EVMPTRLD_VMFAIL,
212 EVMPTRLD_ERROR,
213};
214
215bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa);
216uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu);
217int nested_enable_evmcs(struct kvm_vcpu *vcpu,
218 uint16_t *vmcs_version);
219void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata);
220int nested_evmcs_check_controls(struct vmcs12 *vmcs12);
221
222#endif
223
