1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <linux/errno.h>
4 #include <linux/smp.h>
5
6 #include "../hyperv.h"
7 #include "../cpuid.h"
8 #include "evmcs.h"
9 #include "vmcs.h"
10 #include "vmx.h"
11 #include "trace.h"
12
13 #define CC KVM_NESTED_VMENTER_CONSISTENCY_CHECK
14
15 DEFINE_STATIC_KEY_FALSE(enable_evmcs);
16
17 #define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
18 #define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
19 {EVMCS1_OFFSET(name), clean_field}
20
21 const struct evmcs_field vmcs_field_to_evmcs_1[] = {
22 /* 64 bit rw */
23 EVMCS1_FIELD(GUEST_RIP, guest_rip,
24 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
25 EVMCS1_FIELD(GUEST_RSP, guest_rsp,
26 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
27 EVMCS1_FIELD(GUEST_RFLAGS, guest_rflags,
28 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
29 EVMCS1_FIELD(HOST_IA32_PAT, host_ia32_pat,
30 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
31 EVMCS1_FIELD(HOST_IA32_EFER, host_ia32_efer,
32 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
33 EVMCS1_FIELD(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl,
34 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
35 EVMCS1_FIELD(HOST_CR0, host_cr0,
36 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
37 EVMCS1_FIELD(HOST_CR3, host_cr3,
38 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
39 EVMCS1_FIELD(HOST_CR4, host_cr4,
40 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
41 EVMCS1_FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp,
42 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
43 EVMCS1_FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip,
44 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
45 EVMCS1_FIELD(HOST_RIP, host_rip,
46 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
47 EVMCS1_FIELD(IO_BITMAP_A, io_bitmap_a,
48 HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
49 EVMCS1_FIELD(IO_BITMAP_B, io_bitmap_b,
50 HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
51 EVMCS1_FIELD(MSR_BITMAP, msr_bitmap,
52 HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP),
53 EVMCS1_FIELD(GUEST_ES_BASE, guest_es_base,
54 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
55 EVMCS1_FIELD(GUEST_CS_BASE, guest_cs_base,
56 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
57 EVMCS1_FIELD(GUEST_SS_BASE, guest_ss_base,
58 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
59 EVMCS1_FIELD(GUEST_DS_BASE, guest_ds_base,
60 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
61 EVMCS1_FIELD(GUEST_FS_BASE, guest_fs_base,
62 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
63 EVMCS1_FIELD(GUEST_GS_BASE, guest_gs_base,
64 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
65 EVMCS1_FIELD(GUEST_LDTR_BASE, guest_ldtr_base,
66 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
67 EVMCS1_FIELD(GUEST_TR_BASE, guest_tr_base,
68 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
69 EVMCS1_FIELD(GUEST_GDTR_BASE, guest_gdtr_base,
70 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
71 EVMCS1_FIELD(GUEST_IDTR_BASE, guest_idtr_base,
72 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
73 EVMCS1_FIELD(TSC_OFFSET, tsc_offset,
74 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
75 EVMCS1_FIELD(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr,
76 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
77 EVMCS1_FIELD(VMCS_LINK_POINTER, vmcs_link_pointer,
78 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
79 EVMCS1_FIELD(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl,
80 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
81 EVMCS1_FIELD(GUEST_IA32_PAT, guest_ia32_pat,
82 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
83 EVMCS1_FIELD(GUEST_IA32_EFER, guest_ia32_efer,
84 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
85 EVMCS1_FIELD(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl,
86 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
87 EVMCS1_FIELD(GUEST_PDPTR0, guest_pdptr0,
88 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
89 EVMCS1_FIELD(GUEST_PDPTR1, guest_pdptr1,
90 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
91 EVMCS1_FIELD(GUEST_PDPTR2, guest_pdptr2,
92 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
93 EVMCS1_FIELD(GUEST_PDPTR3, guest_pdptr3,
94 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
95 EVMCS1_FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions,
96 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
97 EVMCS1_FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp,
98 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
99 EVMCS1_FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip,
100 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
101 EVMCS1_FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask,
102 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
103 EVMCS1_FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask,
104 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
105 EVMCS1_FIELD(CR0_READ_SHADOW, cr0_read_shadow,
106 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
107 EVMCS1_FIELD(CR4_READ_SHADOW, cr4_read_shadow,
108 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
109 EVMCS1_FIELD(GUEST_CR0, guest_cr0,
110 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
111 EVMCS1_FIELD(GUEST_CR3, guest_cr3,
112 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
113 EVMCS1_FIELD(GUEST_CR4, guest_cr4,
114 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
115 EVMCS1_FIELD(GUEST_DR7, guest_dr7,
116 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
117 EVMCS1_FIELD(HOST_FS_BASE, host_fs_base,
118 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
119 EVMCS1_FIELD(HOST_GS_BASE, host_gs_base,
120 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
121 EVMCS1_FIELD(HOST_TR_BASE, host_tr_base,
122 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
123 EVMCS1_FIELD(HOST_GDTR_BASE, host_gdtr_base,
124 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
125 EVMCS1_FIELD(HOST_IDTR_BASE, host_idtr_base,
126 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
127 EVMCS1_FIELD(HOST_RSP, host_rsp,
128 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
129 EVMCS1_FIELD(EPT_POINTER, ept_pointer,
130 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
131 EVMCS1_FIELD(GUEST_BNDCFGS, guest_bndcfgs,
132 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
133 EVMCS1_FIELD(XSS_EXIT_BITMAP, xss_exit_bitmap,
134 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
135 EVMCS1_FIELD(ENCLS_EXITING_BITMAP, encls_exiting_bitmap,
136 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
137 EVMCS1_FIELD(TSC_MULTIPLIER, tsc_multiplier,
138 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
139 /*
140 * Not used by KVM:
141 *
142 * EVMCS1_FIELD(0x00006828, guest_ia32_s_cet,
143 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
144 * EVMCS1_FIELD(0x0000682A, guest_ssp,
145 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
146 * EVMCS1_FIELD(0x0000682C, guest_ia32_int_ssp_table_addr,
147 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
148 * EVMCS1_FIELD(0x00002816, guest_ia32_lbr_ctl,
149 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
150 * EVMCS1_FIELD(0x00006C18, host_ia32_s_cet,
151 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
152 * EVMCS1_FIELD(0x00006C1A, host_ssp,
153 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
154 * EVMCS1_FIELD(0x00006C1C, host_ia32_int_ssp_table_addr,
155 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
156 */
157
158 /* 64 bit read only */
159 EVMCS1_FIELD(GUEST_PHYSICAL_ADDRESS, guest_physical_address,
160 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
161 EVMCS1_FIELD(EXIT_QUALIFICATION, exit_qualification,
162 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
163 /*
164 * Not defined in KVM:
165 *
166 * EVMCS1_FIELD(0x00006402, exit_io_instruction_ecx,
167 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
168 * EVMCS1_FIELD(0x00006404, exit_io_instruction_esi,
169 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
170 * EVMCS1_FIELD(0x00006406, exit_io_instruction_esi,
171 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
172 * EVMCS1_FIELD(0x00006408, exit_io_instruction_eip,
173 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
174 */
175 EVMCS1_FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address,
176 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
177
178 /*
179 * No mask defined in the spec as Hyper-V doesn't currently support
180 * these. Future proof by resetting the whole clean field mask on
181 * access.
182 */
183 EVMCS1_FIELD(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr,
184 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
185 EVMCS1_FIELD(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr,
186 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
187 EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr,
188 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
189
190 /* 32 bit rw */
191 EVMCS1_FIELD(TPR_THRESHOLD, tpr_threshold,
192 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
193 EVMCS1_FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info,
194 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
195 EVMCS1_FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control,
196 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC),
197 EVMCS1_FIELD(EXCEPTION_BITMAP, exception_bitmap,
198 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN),
199 EVMCS1_FIELD(VM_ENTRY_CONTROLS, vm_entry_controls,
200 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY),
201 EVMCS1_FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field,
202 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
203 EVMCS1_FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE,
204 vm_entry_exception_error_code,
205 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
206 EVMCS1_FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len,
207 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
208 EVMCS1_FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs,
209 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
210 EVMCS1_FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control,
211 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
212 EVMCS1_FIELD(VM_EXIT_CONTROLS, vm_exit_controls,
213 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
214 EVMCS1_FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control,
215 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
216 EVMCS1_FIELD(GUEST_ES_LIMIT, guest_es_limit,
217 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
218 EVMCS1_FIELD(GUEST_CS_LIMIT, guest_cs_limit,
219 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
220 EVMCS1_FIELD(GUEST_SS_LIMIT, guest_ss_limit,
221 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
222 EVMCS1_FIELD(GUEST_DS_LIMIT, guest_ds_limit,
223 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
224 EVMCS1_FIELD(GUEST_FS_LIMIT, guest_fs_limit,
225 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
226 EVMCS1_FIELD(GUEST_GS_LIMIT, guest_gs_limit,
227 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
228 EVMCS1_FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit,
229 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
230 EVMCS1_FIELD(GUEST_TR_LIMIT, guest_tr_limit,
231 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
232 EVMCS1_FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit,
233 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
234 EVMCS1_FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit,
235 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
236 EVMCS1_FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes,
237 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
238 EVMCS1_FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes,
239 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
240 EVMCS1_FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes,
241 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
242 EVMCS1_FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes,
243 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
244 EVMCS1_FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes,
245 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
246 EVMCS1_FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes,
247 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
248 EVMCS1_FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes,
249 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
250 EVMCS1_FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes,
251 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
252 EVMCS1_FIELD(GUEST_ACTIVITY_STATE, guest_activity_state,
253 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
254 EVMCS1_FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs,
255 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
256
257 /* 32 bit read only */
258 EVMCS1_FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error,
259 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
260 EVMCS1_FIELD(VM_EXIT_REASON, vm_exit_reason,
261 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
262 EVMCS1_FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info,
263 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
264 EVMCS1_FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code,
265 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
266 EVMCS1_FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field,
267 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
268 EVMCS1_FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code,
269 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
270 EVMCS1_FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len,
271 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
272 EVMCS1_FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info,
273 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
274
275 /* No mask defined in the spec (not used) */
276 EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask,
277 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
278 EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match,
279 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
280 EVMCS1_FIELD(CR3_TARGET_COUNT, cr3_target_count,
281 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
282 EVMCS1_FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count,
283 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
284 EVMCS1_FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count,
285 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
286 EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count,
287 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
288
289 /* 16 bit rw */
290 EVMCS1_FIELD(HOST_ES_SELECTOR, host_es_selector,
291 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
292 EVMCS1_FIELD(HOST_CS_SELECTOR, host_cs_selector,
293 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
294 EVMCS1_FIELD(HOST_SS_SELECTOR, host_ss_selector,
295 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
296 EVMCS1_FIELD(HOST_DS_SELECTOR, host_ds_selector,
297 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
298 EVMCS1_FIELD(HOST_FS_SELECTOR, host_fs_selector,
299 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
300 EVMCS1_FIELD(HOST_GS_SELECTOR, host_gs_selector,
301 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
302 EVMCS1_FIELD(HOST_TR_SELECTOR, host_tr_selector,
303 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
304 EVMCS1_FIELD(GUEST_ES_SELECTOR, guest_es_selector,
305 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
306 EVMCS1_FIELD(GUEST_CS_SELECTOR, guest_cs_selector,
307 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
308 EVMCS1_FIELD(GUEST_SS_SELECTOR, guest_ss_selector,
309 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
310 EVMCS1_FIELD(GUEST_DS_SELECTOR, guest_ds_selector,
311 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
312 EVMCS1_FIELD(GUEST_FS_SELECTOR, guest_fs_selector,
313 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
314 EVMCS1_FIELD(GUEST_GS_SELECTOR, guest_gs_selector,
315 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
316 EVMCS1_FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector,
317 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
318 EVMCS1_FIELD(GUEST_TR_SELECTOR, guest_tr_selector,
319 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
320 EVMCS1_FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id,
321 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
322 };
323 const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
324
nested_enlightened_vmentry(struct kvm_vcpu * vcpu,u64 * evmcs_gpa)325 bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa)
326 {
327 struct hv_vp_assist_page assist_page;
328
329 *evmcs_gpa = -1ull;
330
331 if (unlikely(!kvm_hv_get_assist_page(vcpu, &assist_page)))
332 return false;
333
334 if (unlikely(!assist_page.enlighten_vmentry))
335 return false;
336
337 if (unlikely(!evmptr_is_valid(assist_page.current_nested_vmcs)))
338 return false;
339
340 *evmcs_gpa = assist_page.current_nested_vmcs;
341
342 return true;
343 }
344
nested_get_evmcs_version(struct kvm_vcpu * vcpu)345 uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
346 {
347 /*
348 * vmcs_version represents the range of supported Enlightened VMCS
349 * versions: lower 8 bits is the minimal version, higher 8 bits is the
350 * maximum supported version. KVM supports versions from 1 to
351 * KVM_EVMCS_VERSION.
352 *
353 * Note, do not check the Hyper-V is fully enabled in guest CPUID, this
354 * helper is used to _get_ the vCPU's supported CPUID.
355 */
356 if (kvm_cpu_cap_get(X86_FEATURE_VMX) &&
357 (!vcpu || to_vmx(vcpu)->nested.enlightened_vmcs_enabled))
358 return (KVM_EVMCS_VERSION << 8) | 1;
359
360 return 0;
361 }
362
363 enum evmcs_revision {
364 EVMCSv1_LEGACY,
365 NR_EVMCS_REVISIONS,
366 };
367
368 enum evmcs_ctrl_type {
369 EVMCS_EXIT_CTRLS,
370 EVMCS_ENTRY_CTRLS,
371 EVMCS_2NDEXEC,
372 EVMCS_PINCTRL,
373 EVMCS_VMFUNC,
374 NR_EVMCS_CTRLS,
375 };
376
377 static const u32 evmcs_unsupported_ctrls[NR_EVMCS_CTRLS][NR_EVMCS_REVISIONS] = {
378 [EVMCS_EXIT_CTRLS] = {
379 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_VMEXIT_CTRL,
380 },
381 [EVMCS_ENTRY_CTRLS] = {
382 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_VMENTRY_CTRL,
383 },
384 [EVMCS_2NDEXEC] = {
385 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_2NDEXEC,
386 },
387 [EVMCS_PINCTRL] = {
388 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_PINCTRL,
389 },
390 [EVMCS_VMFUNC] = {
391 [EVMCSv1_LEGACY] = EVMCS1_UNSUPPORTED_VMFUNC,
392 },
393 };
394
evmcs_get_unsupported_ctls(enum evmcs_ctrl_type ctrl_type)395 static u32 evmcs_get_unsupported_ctls(enum evmcs_ctrl_type ctrl_type)
396 {
397 enum evmcs_revision evmcs_rev = EVMCSv1_LEGACY;
398
399 return evmcs_unsupported_ctrls[ctrl_type][evmcs_rev];
400 }
401
evmcs_has_perf_global_ctrl(struct kvm_vcpu * vcpu)402 static bool evmcs_has_perf_global_ctrl(struct kvm_vcpu *vcpu)
403 {
404 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu);
405
406 /*
407 * PERF_GLOBAL_CTRL has a quirk where some Windows guests may fail to
408 * boot if a PV CPUID feature flag is not also set. Treat the fields
409 * as unsupported if the flag is not set in guest CPUID. This should
410 * be called only for guest accesses, and all guest accesses should be
411 * gated on Hyper-V being enabled and initialized.
412 */
413 if (WARN_ON_ONCE(!hv_vcpu))
414 return false;
415
416 return hv_vcpu->cpuid_cache.nested_ebx & HV_X64_NESTED_EVMCS1_PERF_GLOBAL_CTRL;
417 }
418
nested_evmcs_filter_control_msr(struct kvm_vcpu * vcpu,u32 msr_index,u64 * pdata)419 void nested_evmcs_filter_control_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
420 {
421 u32 ctl_low = (u32)*pdata;
422 u32 ctl_high = (u32)(*pdata >> 32);
423 u32 unsupported_ctrls;
424
425 /*
426 * Hyper-V 2016 and 2019 try using these features even when eVMCS
427 * is enabled but there are no corresponding fields.
428 */
429 switch (msr_index) {
430 case MSR_IA32_VMX_EXIT_CTLS:
431 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
432 unsupported_ctrls = evmcs_get_unsupported_ctls(EVMCS_EXIT_CTRLS);
433 if (!evmcs_has_perf_global_ctrl(vcpu))
434 unsupported_ctrls |= VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
435 ctl_high &= ~unsupported_ctrls;
436 break;
437 case MSR_IA32_VMX_ENTRY_CTLS:
438 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
439 unsupported_ctrls = evmcs_get_unsupported_ctls(EVMCS_ENTRY_CTRLS);
440 if (!evmcs_has_perf_global_ctrl(vcpu))
441 unsupported_ctrls |= VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
442 ctl_high &= ~unsupported_ctrls;
443 break;
444 case MSR_IA32_VMX_PROCBASED_CTLS2:
445 ctl_high &= ~evmcs_get_unsupported_ctls(EVMCS_2NDEXEC);
446 break;
447 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
448 case MSR_IA32_VMX_PINBASED_CTLS:
449 ctl_high &= ~evmcs_get_unsupported_ctls(EVMCS_PINCTRL);
450 break;
451 case MSR_IA32_VMX_VMFUNC:
452 ctl_low &= ~evmcs_get_unsupported_ctls(EVMCS_VMFUNC);
453 break;
454 }
455
456 *pdata = ctl_low | ((u64)ctl_high << 32);
457 }
458
nested_evmcs_is_valid_controls(enum evmcs_ctrl_type ctrl_type,u32 val)459 static bool nested_evmcs_is_valid_controls(enum evmcs_ctrl_type ctrl_type,
460 u32 val)
461 {
462 return !(val & evmcs_get_unsupported_ctls(ctrl_type));
463 }
464
nested_evmcs_check_controls(struct vmcs12 * vmcs12)465 int nested_evmcs_check_controls(struct vmcs12 *vmcs12)
466 {
467 if (CC(!nested_evmcs_is_valid_controls(EVMCS_PINCTRL,
468 vmcs12->pin_based_vm_exec_control)))
469 return -EINVAL;
470
471 if (CC(!nested_evmcs_is_valid_controls(EVMCS_2NDEXEC,
472 vmcs12->secondary_vm_exec_control)))
473 return -EINVAL;
474
475 if (CC(!nested_evmcs_is_valid_controls(EVMCS_EXIT_CTRLS,
476 vmcs12->vm_exit_controls)))
477 return -EINVAL;
478
479 if (CC(!nested_evmcs_is_valid_controls(EVMCS_ENTRY_CTRLS,
480 vmcs12->vm_entry_controls)))
481 return -EINVAL;
482
483 /*
484 * VM-Func controls are 64-bit, but KVM currently doesn't support any
485 * controls in bits 63:32, i.e. dropping those bits on the consistency
486 * check is intentional.
487 */
488 if (WARN_ON_ONCE(vmcs12->vm_function_control >> 32))
489 return -EINVAL;
490
491 if (CC(!nested_evmcs_is_valid_controls(EVMCS_VMFUNC,
492 vmcs12->vm_function_control)))
493 return -EINVAL;
494
495 return 0;
496 }
497
nested_enable_evmcs(struct kvm_vcpu * vcpu,uint16_t * vmcs_version)498 int nested_enable_evmcs(struct kvm_vcpu *vcpu,
499 uint16_t *vmcs_version)
500 {
501 struct vcpu_vmx *vmx = to_vmx(vcpu);
502
503 vmx->nested.enlightened_vmcs_enabled = true;
504
505 if (vmcs_version)
506 *vmcs_version = nested_get_evmcs_version(vcpu);
507
508 return 0;
509 }
510
