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[sfrench/cifs-2.6.git] / arch / 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 cr0/4 value that a nested guest would read. This is a combination
83  * of L1's "real" cr0 used to run the guest (guest_cr0), and the bits shadowed
84  * by the L1 hypervisor (cr0_read_shadow).  KVM must emulate CPU behavior as
85  * the value+mask loaded into vmcs02 may not match the vmcs12 fields.
86  */
87 static inline unsigned long nested_read_cr0(struct vmcs12 *fields)
88 {
89         return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) |
90                 (fields->cr0_read_shadow & fields->cr0_guest_host_mask);
91 }
92 static inline unsigned long nested_read_cr4(struct vmcs12 *fields)
93 {
94         return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) |
95                 (fields->cr4_read_shadow & fields->cr4_guest_host_mask);
96 }
97
98 static inline unsigned nested_cpu_vmx_misc_cr3_count(struct kvm_vcpu *vcpu)
99 {
100         return vmx_misc_cr3_count(to_vmx(vcpu)->nested.msrs.misc_low);
101 }
102
103 /*
104  * Do the virtual VMX capability MSRs specify that L1 can use VMWRITE
105  * to modify any valid field of the VMCS, or are the VM-exit
106  * information fields read-only?
107  */
108 static inline bool nested_cpu_has_vmwrite_any_field(struct kvm_vcpu *vcpu)
109 {
110         return to_vmx(vcpu)->nested.msrs.misc_low &
111                 MSR_IA32_VMX_MISC_VMWRITE_SHADOW_RO_FIELDS;
112 }
113
114 static inline bool nested_cpu_has_zero_length_injection(struct kvm_vcpu *vcpu)
115 {
116         return to_vmx(vcpu)->nested.msrs.misc_low & VMX_MISC_ZERO_LEN_INS;
117 }
118
119 static inline bool nested_cpu_supports_monitor_trap_flag(struct kvm_vcpu *vcpu)
120 {
121         return to_vmx(vcpu)->nested.msrs.procbased_ctls_high &
122                         CPU_BASED_MONITOR_TRAP_FLAG;
123 }
124
125 static inline bool nested_cpu_has_vmx_shadow_vmcs(struct kvm_vcpu *vcpu)
126 {
127         return to_vmx(vcpu)->nested.msrs.secondary_ctls_high &
128                 SECONDARY_EXEC_SHADOW_VMCS;
129 }
130
131 static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit)
132 {
133         return vmcs12->cpu_based_vm_exec_control & bit;
134 }
135
136 static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit)
137 {
138         return (vmcs12->cpu_based_vm_exec_control &
139                         CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
140                 (vmcs12->secondary_vm_exec_control & bit);
141 }
142
143 static inline bool nested_cpu_has_preemption_timer(struct vmcs12 *vmcs12)
144 {
145         return vmcs12->pin_based_vm_exec_control &
146                 PIN_BASED_VMX_PREEMPTION_TIMER;
147 }
148
149 static inline bool nested_cpu_has_nmi_exiting(struct vmcs12 *vmcs12)
150 {
151         return vmcs12->pin_based_vm_exec_control & PIN_BASED_NMI_EXITING;
152 }
153
154 static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12)
155 {
156         return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS;
157 }
158
159 static inline int nested_cpu_has_mtf(struct vmcs12 *vmcs12)
160 {
161         return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_TRAP_FLAG);
162 }
163
164 static inline int nested_cpu_has_ept(struct vmcs12 *vmcs12)
165 {
166         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_EPT);
167 }
168
169 static inline bool nested_cpu_has_xsaves(struct vmcs12 *vmcs12)
170 {
171         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_XSAVES);
172 }
173
174 static inline bool nested_cpu_has_pml(struct vmcs12 *vmcs12)
175 {
176         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_PML);
177 }
178
179 static inline bool nested_cpu_has_virt_x2apic_mode(struct vmcs12 *vmcs12)
180 {
181         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE);
182 }
183
184 static inline bool nested_cpu_has_vpid(struct vmcs12 *vmcs12)
185 {
186         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VPID);
187 }
188
189 static inline bool nested_cpu_has_apic_reg_virt(struct vmcs12 *vmcs12)
190 {
191         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_APIC_REGISTER_VIRT);
192 }
193
194 static inline bool nested_cpu_has_vid(struct vmcs12 *vmcs12)
195 {
196         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY);
197 }
198
199 static inline bool nested_cpu_has_posted_intr(struct vmcs12 *vmcs12)
200 {
201         return vmcs12->pin_based_vm_exec_control & PIN_BASED_POSTED_INTR;
202 }
203
204 static inline bool nested_cpu_has_vmfunc(struct vmcs12 *vmcs12)
205 {
206         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENABLE_VMFUNC);
207 }
208
209 static inline bool nested_cpu_has_eptp_switching(struct vmcs12 *vmcs12)
210 {
211         return nested_cpu_has_vmfunc(vmcs12) &&
212                 (vmcs12->vm_function_control &
213                  VMX_VMFUNC_EPTP_SWITCHING);
214 }
215
216 static inline bool nested_cpu_has_shadow_vmcs(struct vmcs12 *vmcs12)
217 {
218         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_SHADOW_VMCS);
219 }
220
221 static inline bool nested_cpu_has_save_preemption_timer(struct vmcs12 *vmcs12)
222 {
223         return vmcs12->vm_exit_controls &
224             VM_EXIT_SAVE_VMX_PREEMPTION_TIMER;
225 }
226
227 static inline bool nested_exit_on_nmi(struct kvm_vcpu *vcpu)
228 {
229         return nested_cpu_has_nmi_exiting(get_vmcs12(vcpu));
230 }
231
232 /*
233  * In nested virtualization, check if L1 asked to exit on external interrupts.
234  * For most existing hypervisors, this will always return true.
235  */
236 static inline bool nested_exit_on_intr(struct kvm_vcpu *vcpu)
237 {
238         return get_vmcs12(vcpu)->pin_based_vm_exec_control &
239                 PIN_BASED_EXT_INTR_MASK;
240 }
241
242 static inline bool nested_cpu_has_encls_exit(struct vmcs12 *vmcs12)
243 {
244         return nested_cpu_has2(vmcs12, SECONDARY_EXEC_ENCLS_EXITING);
245 }
246
247 /*
248  * if fixed0[i] == 1: val[i] must be 1
249  * if fixed1[i] == 0: val[i] must be 0
250  */
251 static inline bool fixed_bits_valid(u64 val, u64 fixed0, u64 fixed1)
252 {
253         return ((val & fixed1) | fixed0) == val;
254 }
255
256 static inline bool nested_guest_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
257 {
258         u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0;
259         u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1;
260         struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
261
262         if (to_vmx(vcpu)->nested.msrs.secondary_ctls_high &
263                 SECONDARY_EXEC_UNRESTRICTED_GUEST &&
264             nested_cpu_has2(vmcs12, SECONDARY_EXEC_UNRESTRICTED_GUEST))
265                 fixed0 &= ~(X86_CR0_PE | X86_CR0_PG);
266
267         return fixed_bits_valid(val, fixed0, fixed1);
268 }
269
270 static inline bool nested_host_cr0_valid(struct kvm_vcpu *vcpu, unsigned long val)
271 {
272         u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr0_fixed0;
273         u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr0_fixed1;
274
275         return fixed_bits_valid(val, fixed0, fixed1);
276 }
277
278 static inline bool nested_cr4_valid(struct kvm_vcpu *vcpu, unsigned long val)
279 {
280         u64 fixed0 = to_vmx(vcpu)->nested.msrs.cr4_fixed0;
281         u64 fixed1 = to_vmx(vcpu)->nested.msrs.cr4_fixed1;
282
283         return fixed_bits_valid(val, fixed0, fixed1) &&
284                __kvm_is_valid_cr4(vcpu, val);
285 }
286
287 /* No difference in the restrictions on guest and host CR4 in VMX operation. */
288 #define nested_guest_cr4_valid  nested_cr4_valid
289 #define nested_host_cr4_valid   nested_cr4_valid
290
291 extern struct kvm_x86_nested_ops vmx_nested_ops;
292
293 #endif /* __KVM_X86_VMX_NESTED_H */