1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __KVM_X86_VMX_VMCS12_H
3 #define __KVM_X86_VMX_VMCS12_H
4
5 #include <linux/build_bug.h>
6
7 #include "vmcs.h"
8
9 /*
10 * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a
11 * single nested guest (L2), hence the name vmcs12. Any VMX implementation has
12 * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is
13 * stored in guest memory specified by VMPTRLD, but is opaque to the guest,
14 * which must access it using VMREAD/VMWRITE/VMCLEAR instructions.
15 * More than one of these structures may exist, if L1 runs multiple L2 guests.
16 * nested_vmx_run() will use the data here to build the vmcs02: a VMCS for the
17 * underlying hardware which will be used to run L2.
18 * This structure is packed to ensure that its layout is identical across
19 * machines (necessary for live migration).
20 *
21 * IMPORTANT: Changing the layout of existing fields in this structure
22 * will break save/restore compatibility with older kvm releases. When
23 * adding new fields, either use space in the reserved padding* arrays
24 * or add the new fields to the end of the structure.
25 */
26 typedef u64 natural_width;
27 struct __packed vmcs12 {
28 /* According to the Intel spec, a VMCS region must start with the
29 * following two fields. Then follow implementation-specific data.
30 */
31 struct vmcs_hdr hdr;
32 u32 abort;
33
34 u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */
35 u32 padding[7]; /* room for future expansion */
36
37 u64 io_bitmap_a;
38 u64 io_bitmap_b;
39 u64 msr_bitmap;
40 u64 vm_exit_msr_store_addr;
41 u64 vm_exit_msr_load_addr;
42 u64 vm_entry_msr_load_addr;
43 u64 tsc_offset;
44 u64 virtual_apic_page_addr;
45 u64 apic_access_addr;
46 u64 posted_intr_desc_addr;
47 u64 ept_pointer;
48 u64 eoi_exit_bitmap0;
49 u64 eoi_exit_bitmap1;
50 u64 eoi_exit_bitmap2;
51 u64 eoi_exit_bitmap3;
52 u64 xss_exit_bitmap;
53 u64 guest_physical_address;
54 u64 vmcs_link_pointer;
55 u64 guest_ia32_debugctl;
56 u64 guest_ia32_pat;
57 u64 guest_ia32_efer;
58 u64 guest_ia32_perf_global_ctrl;
59 u64 guest_pdptr0;
60 u64 guest_pdptr1;
61 u64 guest_pdptr2;
62 u64 guest_pdptr3;
63 u64 guest_bndcfgs;
64 u64 host_ia32_pat;
65 u64 host_ia32_efer;
66 u64 host_ia32_perf_global_ctrl;
67 u64 vmread_bitmap;
68 u64 vmwrite_bitmap;
69 u64 vm_function_control;
70 u64 eptp_list_address;
71 u64 pml_address;
72 u64 encls_exiting_bitmap;
73 u64 tsc_multiplier;
74 u64 padding64[1]; /* room for future expansion */
75 /*
76 * To allow migration of L1 (complete with its L2 guests) between
77 * machines of different natural widths (32 or 64 bit), we cannot have
78 * unsigned long fields with no explicit size. We use u64 (aliased
79 * natural_width) instead. Luckily, x86 is little-endian.
80 */
81 natural_width cr0_guest_host_mask;
82 natural_width cr4_guest_host_mask;
83 natural_width cr0_read_shadow;
84 natural_width cr4_read_shadow;
85 natural_width dead_space[4]; /* Last remnants of cr3_target_value[0-3]. */
86 natural_width exit_qualification;
87 natural_width guest_linear_address;
88 natural_width guest_cr0;
89 natural_width guest_cr3;
90 natural_width guest_cr4;
91 natural_width guest_es_base;
92 natural_width guest_cs_base;
93 natural_width guest_ss_base;
94 natural_width guest_ds_base;
95 natural_width guest_fs_base;
96 natural_width guest_gs_base;
97 natural_width guest_ldtr_base;
98 natural_width guest_tr_base;
99 natural_width guest_gdtr_base;
100 natural_width guest_idtr_base;
101 natural_width guest_dr7;
102 natural_width guest_rsp;
103 natural_width guest_rip;
104 natural_width guest_rflags;
105 natural_width guest_pending_dbg_exceptions;
106 natural_width guest_sysenter_esp;
107 natural_width guest_sysenter_eip;
108 natural_width host_cr0;
109 natural_width host_cr3;
110 natural_width host_cr4;
111 natural_width host_fs_base;
112 natural_width host_gs_base;
113 natural_width host_tr_base;
114 natural_width host_gdtr_base;
115 natural_width host_idtr_base;
116 natural_width host_ia32_sysenter_esp;
117 natural_width host_ia32_sysenter_eip;
118 natural_width host_rsp;
119 natural_width host_rip;
120 natural_width paddingl[8]; /* room for future expansion */
121 u32 pin_based_vm_exec_control;
122 u32 cpu_based_vm_exec_control;
123 u32 exception_bitmap;
124 u32 page_fault_error_code_mask;
125 u32 page_fault_error_code_match;
126 u32 cr3_target_count;
127 u32 vm_exit_controls;
128 u32 vm_exit_msr_store_count;
129 u32 vm_exit_msr_load_count;
130 u32 vm_entry_controls;
131 u32 vm_entry_msr_load_count;
132 u32 vm_entry_intr_info_field;
133 u32 vm_entry_exception_error_code;
134 u32 vm_entry_instruction_len;
135 u32 tpr_threshold;
136 u32 secondary_vm_exec_control;
137 u32 vm_instruction_error;
138 u32 vm_exit_reason;
139 u32 vm_exit_intr_info;
140 u32 vm_exit_intr_error_code;
141 u32 idt_vectoring_info_field;
142 u32 idt_vectoring_error_code;
143 u32 vm_exit_instruction_len;
144 u32 vmx_instruction_info;
145 u32 guest_es_limit;
146 u32 guest_cs_limit;
147 u32 guest_ss_limit;
148 u32 guest_ds_limit;
149 u32 guest_fs_limit;
150 u32 guest_gs_limit;
151 u32 guest_ldtr_limit;
152 u32 guest_tr_limit;
153 u32 guest_gdtr_limit;
154 u32 guest_idtr_limit;
155 u32 guest_es_ar_bytes;
156 u32 guest_cs_ar_bytes;
157 u32 guest_ss_ar_bytes;
158 u32 guest_ds_ar_bytes;
159 u32 guest_fs_ar_bytes;
160 u32 guest_gs_ar_bytes;
161 u32 guest_ldtr_ar_bytes;
162 u32 guest_tr_ar_bytes;
163 u32 guest_interruptibility_info;
164 u32 guest_activity_state;
165 u32 guest_sysenter_cs;
166 u32 host_ia32_sysenter_cs;
167 u32 vmx_preemption_timer_value;
168 u32 padding32[7]; /* room for future expansion */
169 u16 virtual_processor_id;
170 u16 posted_intr_nv;
171 u16 guest_es_selector;
172 u16 guest_cs_selector;
173 u16 guest_ss_selector;
174 u16 guest_ds_selector;
175 u16 guest_fs_selector;
176 u16 guest_gs_selector;
177 u16 guest_ldtr_selector;
178 u16 guest_tr_selector;
179 u16 guest_intr_status;
180 u16 host_es_selector;
181 u16 host_cs_selector;
182 u16 host_ss_selector;
183 u16 host_ds_selector;
184 u16 host_fs_selector;
185 u16 host_gs_selector;
186 u16 host_tr_selector;
187 u16 guest_pml_index;
188 };
189
190 /*
191 * VMCS12_REVISION is KVM's arbitrary ID for the layout of struct vmcs12. KVM
192 * enumerates this value to L1 via MSR_IA32_VMX_BASIC, and checks the revision
193 * ID during nested VMPTRLD to verify that L1 is loading a VMCS that adhere's
194 * to KVM's virtual CPU definition.
195 *
196 * DO NOT change this value, as it will break save/restore compatibility with
197 * older KVM releases.
198 */
199 #define VMCS12_REVISION 0x11e57ed0
200
201 /*
202 * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region
203 * and any VMCS region. Although only sizeof(struct vmcs12) are used by the
204 * current implementation, 4K are reserved to avoid future complications and
205 * to preserve userspace ABI.
206 */
207 #define VMCS12_SIZE KVM_STATE_NESTED_VMX_VMCS_SIZE
208
209 /*
210 * For save/restore compatibility, the vmcs12 field offsets must not change,
211 * although appending fields and/or filling gaps is obviously allowed.
212 */
213 #define CHECK_OFFSET(field, loc) \
214 ASSERT_STRUCT_OFFSET(struct vmcs12, field, loc)
215
vmx_check_vmcs12_offsets(void)216 static inline void vmx_check_vmcs12_offsets(void)
217 {
218 CHECK_OFFSET(hdr, 0);
219 CHECK_OFFSET(abort, 4);
220 CHECK_OFFSET(launch_state, 8);
221 CHECK_OFFSET(io_bitmap_a, 40);
222 CHECK_OFFSET(io_bitmap_b, 48);
223 CHECK_OFFSET(msr_bitmap, 56);
224 CHECK_OFFSET(vm_exit_msr_store_addr, 64);
225 CHECK_OFFSET(vm_exit_msr_load_addr, 72);
226 CHECK_OFFSET(vm_entry_msr_load_addr, 80);
227 CHECK_OFFSET(tsc_offset, 88);
228 CHECK_OFFSET(virtual_apic_page_addr, 96);
229 CHECK_OFFSET(apic_access_addr, 104);
230 CHECK_OFFSET(posted_intr_desc_addr, 112);
231 CHECK_OFFSET(ept_pointer, 120);
232 CHECK_OFFSET(eoi_exit_bitmap0, 128);
233 CHECK_OFFSET(eoi_exit_bitmap1, 136);
234 CHECK_OFFSET(eoi_exit_bitmap2, 144);
235 CHECK_OFFSET(eoi_exit_bitmap3, 152);
236 CHECK_OFFSET(xss_exit_bitmap, 160);
237 CHECK_OFFSET(guest_physical_address, 168);
238 CHECK_OFFSET(vmcs_link_pointer, 176);
239 CHECK_OFFSET(guest_ia32_debugctl, 184);
240 CHECK_OFFSET(guest_ia32_pat, 192);
241 CHECK_OFFSET(guest_ia32_efer, 200);
242 CHECK_OFFSET(guest_ia32_perf_global_ctrl, 208);
243 CHECK_OFFSET(guest_pdptr0, 216);
244 CHECK_OFFSET(guest_pdptr1, 224);
245 CHECK_OFFSET(guest_pdptr2, 232);
246 CHECK_OFFSET(guest_pdptr3, 240);
247 CHECK_OFFSET(guest_bndcfgs, 248);
248 CHECK_OFFSET(host_ia32_pat, 256);
249 CHECK_OFFSET(host_ia32_efer, 264);
250 CHECK_OFFSET(host_ia32_perf_global_ctrl, 272);
251 CHECK_OFFSET(vmread_bitmap, 280);
252 CHECK_OFFSET(vmwrite_bitmap, 288);
253 CHECK_OFFSET(vm_function_control, 296);
254 CHECK_OFFSET(eptp_list_address, 304);
255 CHECK_OFFSET(pml_address, 312);
256 CHECK_OFFSET(encls_exiting_bitmap, 320);
257 CHECK_OFFSET(tsc_multiplier, 328);
258 CHECK_OFFSET(cr0_guest_host_mask, 344);
259 CHECK_OFFSET(cr4_guest_host_mask, 352);
260 CHECK_OFFSET(cr0_read_shadow, 360);
261 CHECK_OFFSET(cr4_read_shadow, 368);
262 CHECK_OFFSET(dead_space, 376);
263 CHECK_OFFSET(exit_qualification, 408);
264 CHECK_OFFSET(guest_linear_address, 416);
265 CHECK_OFFSET(guest_cr0, 424);
266 CHECK_OFFSET(guest_cr3, 432);
267 CHECK_OFFSET(guest_cr4, 440);
268 CHECK_OFFSET(guest_es_base, 448);
269 CHECK_OFFSET(guest_cs_base, 456);
270 CHECK_OFFSET(guest_ss_base, 464);
271 CHECK_OFFSET(guest_ds_base, 472);
272 CHECK_OFFSET(guest_fs_base, 480);
273 CHECK_OFFSET(guest_gs_base, 488);
274 CHECK_OFFSET(guest_ldtr_base, 496);
275 CHECK_OFFSET(guest_tr_base, 504);
276 CHECK_OFFSET(guest_gdtr_base, 512);
277 CHECK_OFFSET(guest_idtr_base, 520);
278 CHECK_OFFSET(guest_dr7, 528);
279 CHECK_OFFSET(guest_rsp, 536);
280 CHECK_OFFSET(guest_rip, 544);
281 CHECK_OFFSET(guest_rflags, 552);
282 CHECK_OFFSET(guest_pending_dbg_exceptions, 560);
283 CHECK_OFFSET(guest_sysenter_esp, 568);
284 CHECK_OFFSET(guest_sysenter_eip, 576);
285 CHECK_OFFSET(host_cr0, 584);
286 CHECK_OFFSET(host_cr3, 592);
287 CHECK_OFFSET(host_cr4, 600);
288 CHECK_OFFSET(host_fs_base, 608);
289 CHECK_OFFSET(host_gs_base, 616);
290 CHECK_OFFSET(host_tr_base, 624);
291 CHECK_OFFSET(host_gdtr_base, 632);
292 CHECK_OFFSET(host_idtr_base, 640);
293 CHECK_OFFSET(host_ia32_sysenter_esp, 648);
294 CHECK_OFFSET(host_ia32_sysenter_eip, 656);
295 CHECK_OFFSET(host_rsp, 664);
296 CHECK_OFFSET(host_rip, 672);
297 CHECK_OFFSET(pin_based_vm_exec_control, 744);
298 CHECK_OFFSET(cpu_based_vm_exec_control, 748);
299 CHECK_OFFSET(exception_bitmap, 752);
300 CHECK_OFFSET(page_fault_error_code_mask, 756);
301 CHECK_OFFSET(page_fault_error_code_match, 760);
302 CHECK_OFFSET(cr3_target_count, 764);
303 CHECK_OFFSET(vm_exit_controls, 768);
304 CHECK_OFFSET(vm_exit_msr_store_count, 772);
305 CHECK_OFFSET(vm_exit_msr_load_count, 776);
306 CHECK_OFFSET(vm_entry_controls, 780);
307 CHECK_OFFSET(vm_entry_msr_load_count, 784);
308 CHECK_OFFSET(vm_entry_intr_info_field, 788);
309 CHECK_OFFSET(vm_entry_exception_error_code, 792);
310 CHECK_OFFSET(vm_entry_instruction_len, 796);
311 CHECK_OFFSET(tpr_threshold, 800);
312 CHECK_OFFSET(secondary_vm_exec_control, 804);
313 CHECK_OFFSET(vm_instruction_error, 808);
314 CHECK_OFFSET(vm_exit_reason, 812);
315 CHECK_OFFSET(vm_exit_intr_info, 816);
316 CHECK_OFFSET(vm_exit_intr_error_code, 820);
317 CHECK_OFFSET(idt_vectoring_info_field, 824);
318 CHECK_OFFSET(idt_vectoring_error_code, 828);
319 CHECK_OFFSET(vm_exit_instruction_len, 832);
320 CHECK_OFFSET(vmx_instruction_info, 836);
321 CHECK_OFFSET(guest_es_limit, 840);
322 CHECK_OFFSET(guest_cs_limit, 844);
323 CHECK_OFFSET(guest_ss_limit, 848);
324 CHECK_OFFSET(guest_ds_limit, 852);
325 CHECK_OFFSET(guest_fs_limit, 856);
326 CHECK_OFFSET(guest_gs_limit, 860);
327 CHECK_OFFSET(guest_ldtr_limit, 864);
328 CHECK_OFFSET(guest_tr_limit, 868);
329 CHECK_OFFSET(guest_gdtr_limit, 872);
330 CHECK_OFFSET(guest_idtr_limit, 876);
331 CHECK_OFFSET(guest_es_ar_bytes, 880);
332 CHECK_OFFSET(guest_cs_ar_bytes, 884);
333 CHECK_OFFSET(guest_ss_ar_bytes, 888);
334 CHECK_OFFSET(guest_ds_ar_bytes, 892);
335 CHECK_OFFSET(guest_fs_ar_bytes, 896);
336 CHECK_OFFSET(guest_gs_ar_bytes, 900);
337 CHECK_OFFSET(guest_ldtr_ar_bytes, 904);
338 CHECK_OFFSET(guest_tr_ar_bytes, 908);
339 CHECK_OFFSET(guest_interruptibility_info, 912);
340 CHECK_OFFSET(guest_activity_state, 916);
341 CHECK_OFFSET(guest_sysenter_cs, 920);
342 CHECK_OFFSET(host_ia32_sysenter_cs, 924);
343 CHECK_OFFSET(vmx_preemption_timer_value, 928);
344 CHECK_OFFSET(virtual_processor_id, 960);
345 CHECK_OFFSET(posted_intr_nv, 962);
346 CHECK_OFFSET(guest_es_selector, 964);
347 CHECK_OFFSET(guest_cs_selector, 966);
348 CHECK_OFFSET(guest_ss_selector, 968);
349 CHECK_OFFSET(guest_ds_selector, 970);
350 CHECK_OFFSET(guest_fs_selector, 972);
351 CHECK_OFFSET(guest_gs_selector, 974);
352 CHECK_OFFSET(guest_ldtr_selector, 976);
353 CHECK_OFFSET(guest_tr_selector, 978);
354 CHECK_OFFSET(guest_intr_status, 980);
355 CHECK_OFFSET(host_es_selector, 982);
356 CHECK_OFFSET(host_cs_selector, 984);
357 CHECK_OFFSET(host_ss_selector, 986);
358 CHECK_OFFSET(host_ds_selector, 988);
359 CHECK_OFFSET(host_fs_selector, 990);
360 CHECK_OFFSET(host_gs_selector, 992);
361 CHECK_OFFSET(host_tr_selector, 994);
362 CHECK_OFFSET(guest_pml_index, 996);
363 }
364
365 extern const unsigned short vmcs12_field_offsets[];
366 extern const unsigned int nr_vmcs12_fields;
367
get_vmcs12_field_offset(unsigned long field)368 static inline short get_vmcs12_field_offset(unsigned long field)
369 {
370 unsigned short offset;
371 unsigned int index;
372
373 if (field >> 15)
374 return -ENOENT;
375
376 index = ROL16(field, 6);
377 if (index >= nr_vmcs12_fields)
378 return -ENOENT;
379
380 index = array_index_nospec(index, nr_vmcs12_fields);
381 offset = vmcs12_field_offsets[index];
382 if (offset == 0)
383 return -ENOENT;
384 return offset;
385 }
386
vmcs12_read_any(struct vmcs12 * vmcs12,unsigned long field,u16 offset)387 static inline u64 vmcs12_read_any(struct vmcs12 *vmcs12, unsigned long field,
388 u16 offset)
389 {
390 char *p = (char *)vmcs12 + offset;
391
392 switch (vmcs_field_width(field)) {
393 case VMCS_FIELD_WIDTH_NATURAL_WIDTH:
394 return *((natural_width *)p);
395 case VMCS_FIELD_WIDTH_U16:
396 return *((u16 *)p);
397 case VMCS_FIELD_WIDTH_U32:
398 return *((u32 *)p);
399 case VMCS_FIELD_WIDTH_U64:
400 return *((u64 *)p);
401 default:
402 WARN_ON_ONCE(1);
403 return -1;
404 }
405 }
406
vmcs12_write_any(struct vmcs12 * vmcs12,unsigned long field,u16 offset,u64 field_value)407 static inline void vmcs12_write_any(struct vmcs12 *vmcs12, unsigned long field,
408 u16 offset, u64 field_value)
409 {
410 char *p = (char *)vmcs12 + offset;
411
412 switch (vmcs_field_width(field)) {
413 case VMCS_FIELD_WIDTH_U16:
414 *(u16 *)p = field_value;
415 break;
416 case VMCS_FIELD_WIDTH_U32:
417 *(u32 *)p = field_value;
418 break;
419 case VMCS_FIELD_WIDTH_U64:
420 *(u64 *)p = field_value;
421 break;
422 case VMCS_FIELD_WIDTH_NATURAL_WIDTH:
423 *(natural_width *)p = field_value;
424 break;
425 default:
426 WARN_ON_ONCE(1);
427 break;
428 }
429 }
430
431 #endif /* __KVM_X86_VMX_VMCS12_H */
432