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[releases.git] / x86 / kvm / vmx / nested.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KVM_X86_VMX_NESTED_H
3 #define __KVM_X86_VMX_NESTED_H
4
5 #include "kvm_cache_regs.h"
6 #include "vmcs12.h"
7 #include "vmx.h"
8
9 /*
10  * Status returned by nested_vmx_enter_non_root_mode():
11  */
12 enum nvmx_vmentry_status {
13         NVMX_VMENTRY_SUCCESS,           /* Entered VMX non-root mode */
14         NVMX_VMENTRY_VMFAIL,            /* Consistency check VMFail */
15         NVMX_VMENTRY_VMEXIT,            /* Consistency check VMExit */
16         NVMX_VMENTRY_KVM_INTERNAL_ERROR,/* KVM internal error */
17 };
18
19 void vmx_leave_nested(struct kvm_vcpu *vcpu);
20 void nested_vmx_setup_ctls_msrs(struct vmcs_config *vmcs_conf, u32 ept_caps);
21 void nested_vmx_hardware_unsetup(void);
22 __init int nested_vmx_hardware_setup(int (*exit_handlers[])(struct kvm_vcpu *));
23 void nested_vmx_set_vmcs_shadowing_bitmap(void);
24 void nested_vmx_free_vcpu(struct kvm_vcpu *vcpu);
25 enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
26                                                      bool from_vmentry);
27 bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu);
28 void nested_vmx_vmexit(struct kvm_vcpu *vcpu, u32 vm_exit_reason,
29                        u32 exit_intr_info, unsigned long exit_qualification);
30 void nested_sync_vmcs12_to_shadow(struct kvm_vcpu *vcpu);
31 int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data);
32 int vmx_get_vmx_msr(struct nested_vmx_msrs *msrs, u32 msr_index, u64 *pdata);
33 int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification,
34                         u32 vmx_instruction_info, bool wr, int len, gva_t *ret);
35 void nested_mark_vmcs12_pages_dirty(struct kvm_vcpu *vcpu);
36 bool nested_vmx_check_io_bitmaps(struct kvm_vcpu *vcpu, unsigned int port,
37                                  int size);
38
39 static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu)
40 {
41         return to_vmx(vcpu)->nested.cached_vmcs12;
42 }
43
44 static inline struct vmcs12 *get_shadow_vmcs12(struct kvm_vcpu *vcpu)
45 {
46         return to_vmx(vcpu)->nested.cached_shadow_vmcs12;
47 }
48
49 /*
50  * Note: the same condition is checked against the state provided by userspace
51  * in vmx_set_nested_state; if it is satisfied, the nested state must include
52  * the VMCS12.
53  */
54 static inline int vmx_has_valid_vmcs12(struct kvm_vcpu *vcpu)
55 {
56         struct vcpu_vmx *vmx = to_vmx(vcpu);
57
58         /* 'hv_evmcs_vmptr' can also be EVMPTR_MAP_PENDING here */
59         return vmx->nested.current_vmptr != -1ull ||
60                 vmx->nested.hv_evmcs_vmptr != EVMPTR_INVALID;
61 }
62
63 static inline u16 nested_get_vpid02(struct kvm_vcpu *vcpu)
64 {
65         struct vcpu_vmx *vmx = to_vmx(vcpu);
66
67         return vmx->nested.vpid02 ? vmx->nested.vpid02 : vmx->vpid;
68 }
69
70 static inline unsigned long nested_ept_get_eptp(struct kvm_vcpu *vcpu)
71 {
72         /* return the page table to be shadowed - in our case, EPT12 */
73         return get_vmcs12(vcpu)->ept_pointer;
74 }
75
76 static inline bool nested_ept_ad_enabled(struct kvm_vcpu *vcpu)
77 {
78         return nested_ept_get_eptp(vcpu) & VMX_EPTP_AD_ENABLE_BIT;
79 }
80
81 /*
82  * Return the cr0 value that a nested guest would read. This is a combination
83  * of the real cr0 used to run the guest (guest_cr0), and the bits shadowed by
84  * its hypervisor (cr0_read_shadow).
85  */
86 static inline unsigned long nested_read_cr0(struct vmcs12 *fields)
87 {
88         return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) |
89                 (fields->cr0_read_shadow & fields->cr0_guest_host_mask);
90 }
91 static inline unsigned long nested_read_cr4(struct vmcs12 *fields)
92 {
93         return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) |
94                 (fields->cr4_read_shadow & fields->cr4_guest_host_mask);
95 }
96
97 static inline unsigned nested_cpu_vmx_misc_cr3_count(struct kvm_vcpu *vcpu)
98 {
99         return vmx_misc_cr3_count(to_vmx(vcpu)->nested.msrs.misc_low);
100 }
101
102 /*
103  * Do the virtual VMX capability MSRs specify that L1 can use VMWRITE
104  * to modify any valid field of the VMCS, or are the VM-exit
105  * information fields read-only?
106  */
107 static inline bool nested_cpu_has_vmwrite_any_field(struct kvm_vcpu *vcpu)
108 {
109         return to_vmx(vcpu)->nested.msrs.misc_low &
110                 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS;
111 }
112
113 static inline bool nested_cpu_has_zero_length_injection(struct kvm_vcpu *vcpu)
114 {
115         return to_vmx(vcpu)->nested.msrs.misc_low & VMX_MISC_ZERO_LEN_INS;
116 }
117
118 static inline bool nested_cpu_supports_monitor_trap_flag(struct kvm_vcpu *vcpu)
119 {
120         return to_vmx(vcpu)->nested.msrs.procbased_ctls_high &
121                         CPU_BASED_MONITOR_TRAP_FLAG;
122 }
123
124 static inline bool nested_cpu_has_vmx_shadow_vmcs(struct kvm_vcpu *vcpu)
125 {
126         return to_vmx(vcpu)->nested.msrs.secondary_ctls_high &
127                 SECONDARY_EXEC_SHADOW_VMCS;
128 }
129
130 static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit)
131 {
132         return vmcs12->cpu_based_vm_exec_control & bit;
133 }
134
135 static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit)
136 {
137         return (vmcs12->cpu_based_vm_exec_control &
138                         CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
139                 (vmcs12->secondary_vm_exec_control & bit);
140 }
141
142 static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12)
143 {
144         return vmcs12->pin_based_vm_exec_control &
145                 PIN_BASED_VMX_PREEMPTION_TIMER;
146 }
147
148 static inline bool nested_cpu_has_nmi_exiting(struct vmcs12 *vmcs12)
149 {
150         return vmcs12->pin_based_vm_exec_control & PIN_BASED_NMI_EXITING;
151 }
152
153 static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12)
154 {
155         return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS;
156 }
157
158 static inline int nested_cpu_has_mtf(struct vmcs12 *vmcs12)
159 {
160         return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG);
161 }
162
163 static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12)
164 {
165         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT);
166 }
167
168 static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12)
169 {
170         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_XSAVES);
171 }
172
173 static inline bool nested_cpu_has_pml(struct vmcs12 *vmcs12)
174 {
175         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_PML);
176 }
177
178 static inline bool nested_cpu_has_virt_x2apic_mode(struct vmcs12 *vmcs12)
179 {
180         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE);
181 }
182
183 static inline bool nested_cpu_has_vpid(struct vmcs12 *vmcs12)
184 {
185         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VPID);
186 }
187
188 static inline bool nested_cpu_has_apic_reg_virt(struct vmcs12 *vmcs12)
189 {
190         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_APIC_REGISTER_VIRT);
191 }
192
193 static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12)
194 {
195         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY);
196 }
197
198 static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12)
199 {
200         return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR;
201 }
202
203 static inline bool nested_cpu_has_vmfunc(struct vmcs12 *vmcs12)
204 {
205         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VMFUNC);
206 }
207
208 static inline bool nested_cpu_has_eptp_switching(struct vmcs12 *vmcs12)
209 {
210         return nested_cpu_has_vmfunc(vmcs12) &&
211                 (vmcs12->vm_function_control &
212                  VMX_VMFUNC_EPTP_SWITCHING);
213 }
214
215 static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12)
216 {
217         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_SHADOW_VMCS);
218 }
219
220 static inline bool nested_cpu_has_save_preemption_timer(struct vmcs12 *vmcs12)
221 {
222         return vmcs12->vm_exit_controls &
223             VM_EXIT_SAVE_VMX_PREEMPTION_TIMER;
224 }
225
226 static inline bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
227 {
228         return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
229 }
230
231 /*
232  * In nested virtualization, check if L1 asked to exit on external interrupts.
233  * For most existing hypervisors, this will always return true.
234  */
235 static inline bool nested_exit_on_intr(struct kvm_vcpu *vcpu)
236 {
237         return get_vmcs12(vcpu)->pin_based_vm_exec_control &
238                 PIN_BASED_EXT_INTR_MASK;
239 }
240
241 static inline bool nested_cpu_has_encls_exit(struct vmcs12 *vmcs12)
242 {
243         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENCLS_EXITING);
244 }
245
246 /*
247  * if fixed0[i] == 1: val[i] must be 1
248  * if fixed1[i] == 0: val[i] must be 0
249  */
250 static inline bool fixed_bits_valid(u64 val, u64 fixed0, u64 fixed1)
251 {
252         return ((val & fixed1) | fixed0) == val;
253 }
254
255 static inline bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
256 {
257         u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0;
258         u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1;
259         struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
260
261         if (to_vmx(vcpu)->nested.msrs.secondary_ctls_high &
262                 SECONDARY_EXEC_UNRESTRICTED_GUEST &&
263             nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST))
264                 fixed0 &= ~(X86_CR0_PE | X86_CR0_PG);
265
266         return fixed_bits_valid(val, fixed0, fixed1);
267 }
268
269 static inline bool nested_host_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
270 {
271         u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0;
272         u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1;
273
274         return fixed_bits_valid(val, fixed0, fixed1);
275 }
276
277 static inline bool nested_cr4_valid(struct kvm_vcpu *vcpu, unsigned long val)
278 {
279         u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr4_fixed0;
280         u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr4_fixed1;
281
282         return fixed_bits_valid(val, fixed0, fixed1) &&
283                __kvm_is_valid_cr4(vcpu, val);
284 }
285
286 /* No difference in the restrictions on guest and host CR4 in VMX operation. */
287 #define nested_guest_cr4_valid  nested_cr4_valid
288 #define nested_host_cr4_valid   nested_cr4_valid
289
290 extern struct kvm_x86_nested_ops vmx_nested_ops;
291
292 #endif /* __KVM_X86_VMX_NESTED_H */