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_STATIC_KEY_FALSE(enable_evmcs);
14
15 #if IS_ENABLED(CONFIG_HYPERV)
16
17 #define ROL16(val, n) ((u16)(((u16)(val) << (n)) | ((u16)(val) >> (16 - (n)))))
18 #define EVMCS1_OFFSET(x) offsetof(struct hv_enlightened_vmcs, x)
19 #define EVMCS1_FIELD(number, name, clean_field)[ROL16(number, 6)] = \
20 {EVMCS1_OFFSET(name), clean_field}
21
22 const struct evmcs_field vmcs_field_to_evmcs_1[] = {
23 /* 64 bit rw */
24 EVMCS1_FIELD(GUEST_RIP, guest_rip,
25 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
26 EVMCS1_FIELD(GUEST_RSP, guest_rsp,
27 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
28 EVMCS1_FIELD(GUEST_RFLAGS, guest_rflags,
29 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
30 EVMCS1_FIELD(HOST_IA32_PAT, host_ia32_pat,
31 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
32 EVMCS1_FIELD(HOST_IA32_EFER, host_ia32_efer,
33 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
34 EVMCS1_FIELD(HOST_CR0, host_cr0,
35 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
36 EVMCS1_FIELD(HOST_CR3, host_cr3,
37 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
38 EVMCS1_FIELD(HOST_CR4, host_cr4,
39 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
40 EVMCS1_FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp,
41 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
42 EVMCS1_FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip,
43 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
44 EVMCS1_FIELD(HOST_RIP, host_rip,
45 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
46 EVMCS1_FIELD(IO_BITMAP_A, io_bitmap_a,
47 HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
48 EVMCS1_FIELD(IO_BITMAP_B, io_bitmap_b,
49 HV_VMX_ENLIGHTENED_CLEAN_FIELD_IO_BITMAP),
50 EVMCS1_FIELD(MSR_BITMAP, msr_bitmap,
51 HV_VMX_ENLIGHTENED_CLEAN_FIELD_MSR_BITMAP),
52 EVMCS1_FIELD(GUEST_ES_BASE, guest_es_base,
53 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
54 EVMCS1_FIELD(GUEST_CS_BASE, guest_cs_base,
55 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
56 EVMCS1_FIELD(GUEST_SS_BASE, guest_ss_base,
57 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
58 EVMCS1_FIELD(GUEST_DS_BASE, guest_ds_base,
59 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
60 EVMCS1_FIELD(GUEST_FS_BASE, guest_fs_base,
61 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
62 EVMCS1_FIELD(GUEST_GS_BASE, guest_gs_base,
63 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
64 EVMCS1_FIELD(GUEST_LDTR_BASE, guest_ldtr_base,
65 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
66 EVMCS1_FIELD(GUEST_TR_BASE, guest_tr_base,
67 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
68 EVMCS1_FIELD(GUEST_GDTR_BASE, guest_gdtr_base,
69 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
70 EVMCS1_FIELD(GUEST_IDTR_BASE, guest_idtr_base,
71 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
72 EVMCS1_FIELD(TSC_OFFSET, tsc_offset,
73 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
74 EVMCS1_FIELD(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr,
75 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
76 EVMCS1_FIELD(VMCS_LINK_POINTER, vmcs_link_pointer,
77 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
78 EVMCS1_FIELD(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl,
79 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
80 EVMCS1_FIELD(GUEST_IA32_PAT, guest_ia32_pat,
81 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
82 EVMCS1_FIELD(GUEST_IA32_EFER, guest_ia32_efer,
83 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
84 EVMCS1_FIELD(GUEST_PDPTR0, guest_pdptr0,
85 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
86 EVMCS1_FIELD(GUEST_PDPTR1, guest_pdptr1,
87 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
88 EVMCS1_FIELD(GUEST_PDPTR2, guest_pdptr2,
89 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
90 EVMCS1_FIELD(GUEST_PDPTR3, guest_pdptr3,
91 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
92 EVMCS1_FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions,
93 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
94 EVMCS1_FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp,
95 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
96 EVMCS1_FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip,
97 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
98 EVMCS1_FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask,
99 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
100 EVMCS1_FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask,
101 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
102 EVMCS1_FIELD(CR0_READ_SHADOW, cr0_read_shadow,
103 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
104 EVMCS1_FIELD(CR4_READ_SHADOW, cr4_read_shadow,
105 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
106 EVMCS1_FIELD(GUEST_CR0, guest_cr0,
107 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
108 EVMCS1_FIELD(GUEST_CR3, guest_cr3,
109 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
110 EVMCS1_FIELD(GUEST_CR4, guest_cr4,
111 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
112 EVMCS1_FIELD(GUEST_DR7, guest_dr7,
113 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CRDR),
114 EVMCS1_FIELD(HOST_FS_BASE, host_fs_base,
115 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
116 EVMCS1_FIELD(HOST_GS_BASE, host_gs_base,
117 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
118 EVMCS1_FIELD(HOST_TR_BASE, host_tr_base,
119 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
120 EVMCS1_FIELD(HOST_GDTR_BASE, host_gdtr_base,
121 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
122 EVMCS1_FIELD(HOST_IDTR_BASE, host_idtr_base,
123 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
124 EVMCS1_FIELD(HOST_RSP, host_rsp,
125 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_POINTER),
126 EVMCS1_FIELD(EPT_POINTER, ept_pointer,
127 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
128 EVMCS1_FIELD(GUEST_BNDCFGS, guest_bndcfgs,
129 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
130 EVMCS1_FIELD(XSS_EXIT_BITMAP, xss_exit_bitmap,
131 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP2),
132
133 /* 64 bit read only */
134 EVMCS1_FIELD(GUEST_PHYSICAL_ADDRESS, guest_physical_address,
135 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
136 EVMCS1_FIELD(EXIT_QUALIFICATION, exit_qualification,
137 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
138 /*
139 * Not defined in KVM:
140 *
141 * EVMCS1_FIELD(0x00006402, exit_io_instruction_ecx,
142 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
143 * EVMCS1_FIELD(0x00006404, exit_io_instruction_esi,
144 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
145 * EVMCS1_FIELD(0x00006406, exit_io_instruction_esi,
146 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
147 * EVMCS1_FIELD(0x00006408, exit_io_instruction_eip,
148 * HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE);
149 */
150 EVMCS1_FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address,
151 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
152
153 /*
154 * No mask defined in the spec as Hyper-V doesn't currently support
155 * these. Future proof by resetting the whole clean field mask on
156 * access.
157 */
158 EVMCS1_FIELD(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr,
159 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
160 EVMCS1_FIELD(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr,
161 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
162 EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr,
163 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
164
165 /* 32 bit rw */
166 EVMCS1_FIELD(TPR_THRESHOLD, tpr_threshold,
167 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
168 EVMCS1_FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info,
169 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_BASIC),
170 EVMCS1_FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control,
171 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_PROC),
172 EVMCS1_FIELD(EXCEPTION_BITMAP, exception_bitmap,
173 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EXCPN),
174 EVMCS1_FIELD(VM_ENTRY_CONTROLS, vm_entry_controls,
175 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_ENTRY),
176 EVMCS1_FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field,
177 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
178 EVMCS1_FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE,
179 vm_entry_exception_error_code,
180 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
181 EVMCS1_FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len,
182 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_EVENT),
183 EVMCS1_FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs,
184 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
185 EVMCS1_FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control,
186 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
187 EVMCS1_FIELD(VM_EXIT_CONTROLS, vm_exit_controls,
188 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
189 EVMCS1_FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control,
190 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_GRP1),
191 EVMCS1_FIELD(GUEST_ES_LIMIT, guest_es_limit,
192 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
193 EVMCS1_FIELD(GUEST_CS_LIMIT, guest_cs_limit,
194 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
195 EVMCS1_FIELD(GUEST_SS_LIMIT, guest_ss_limit,
196 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
197 EVMCS1_FIELD(GUEST_DS_LIMIT, guest_ds_limit,
198 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
199 EVMCS1_FIELD(GUEST_FS_LIMIT, guest_fs_limit,
200 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
201 EVMCS1_FIELD(GUEST_GS_LIMIT, guest_gs_limit,
202 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
203 EVMCS1_FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit,
204 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
205 EVMCS1_FIELD(GUEST_TR_LIMIT, guest_tr_limit,
206 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
207 EVMCS1_FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit,
208 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
209 EVMCS1_FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit,
210 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
211 EVMCS1_FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes,
212 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
213 EVMCS1_FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes,
214 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
215 EVMCS1_FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes,
216 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
217 EVMCS1_FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes,
218 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
219 EVMCS1_FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes,
220 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
221 EVMCS1_FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes,
222 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
223 EVMCS1_FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes,
224 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
225 EVMCS1_FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes,
226 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
227 EVMCS1_FIELD(GUEST_ACTIVITY_STATE, guest_activity_state,
228 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
229 EVMCS1_FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs,
230 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP1),
231
232 /* 32 bit read only */
233 EVMCS1_FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error,
234 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
235 EVMCS1_FIELD(VM_EXIT_REASON, vm_exit_reason,
236 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
237 EVMCS1_FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info,
238 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
239 EVMCS1_FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code,
240 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
241 EVMCS1_FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field,
242 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
243 EVMCS1_FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code,
244 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
245 EVMCS1_FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len,
246 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
247 EVMCS1_FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info,
248 HV_VMX_ENLIGHTENED_CLEAN_FIELD_NONE),
249
250 /* No mask defined in the spec (not used) */
251 EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask,
252 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
253 EVMCS1_FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match,
254 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
255 EVMCS1_FIELD(CR3_TARGET_COUNT, cr3_target_count,
256 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
257 EVMCS1_FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count,
258 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
259 EVMCS1_FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count,
260 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
261 EVMCS1_FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count,
262 HV_VMX_ENLIGHTENED_CLEAN_FIELD_ALL),
263
264 /* 16 bit rw */
265 EVMCS1_FIELD(HOST_ES_SELECTOR, host_es_selector,
266 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
267 EVMCS1_FIELD(HOST_CS_SELECTOR, host_cs_selector,
268 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
269 EVMCS1_FIELD(HOST_SS_SELECTOR, host_ss_selector,
270 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
271 EVMCS1_FIELD(HOST_DS_SELECTOR, host_ds_selector,
272 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
273 EVMCS1_FIELD(HOST_FS_SELECTOR, host_fs_selector,
274 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
275 EVMCS1_FIELD(HOST_GS_SELECTOR, host_gs_selector,
276 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
277 EVMCS1_FIELD(HOST_TR_SELECTOR, host_tr_selector,
278 HV_VMX_ENLIGHTENED_CLEAN_FIELD_HOST_GRP1),
279 EVMCS1_FIELD(GUEST_ES_SELECTOR, guest_es_selector,
280 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
281 EVMCS1_FIELD(GUEST_CS_SELECTOR, guest_cs_selector,
282 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
283 EVMCS1_FIELD(GUEST_SS_SELECTOR, guest_ss_selector,
284 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
285 EVMCS1_FIELD(GUEST_DS_SELECTOR, guest_ds_selector,
286 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
287 EVMCS1_FIELD(GUEST_FS_SELECTOR, guest_fs_selector,
288 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
289 EVMCS1_FIELD(GUEST_GS_SELECTOR, guest_gs_selector,
290 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
291 EVMCS1_FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector,
292 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
293 EVMCS1_FIELD(GUEST_TR_SELECTOR, guest_tr_selector,
294 HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2),
295 EVMCS1_FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id,
296 HV_VMX_ENLIGHTENED_CLEAN_FIELD_CONTROL_XLAT),
297 };
298 const unsigned int nr_evmcs_1_fields = ARRAY_SIZE(vmcs_field_to_evmcs_1);
299
evmcs_sanitize_exec_ctrls(struct vmcs_config * vmcs_conf)300 __init void evmcs_sanitize_exec_ctrls(struct vmcs_config *vmcs_conf)
301 {
302 vmcs_conf->pin_based_exec_ctrl &= ~EVMCS1_UNSUPPORTED_PINCTRL;
303 vmcs_conf->cpu_based_2nd_exec_ctrl &= ~EVMCS1_UNSUPPORTED_2NDEXEC;
304
305 vmcs_conf->vmexit_ctrl &= ~EVMCS1_UNSUPPORTED_VMEXIT_CTRL;
306 vmcs_conf->vmentry_ctrl &= ~EVMCS1_UNSUPPORTED_VMENTRY_CTRL;
307 }
308 #endif
309
nested_enlightened_vmentry(struct kvm_vcpu * vcpu,u64 * evmcs_gpa)310 bool nested_enlightened_vmentry(struct kvm_vcpu *vcpu, u64 *evmcs_gpa)
311 {
312 struct hv_vp_assist_page assist_page;
313
314 *evmcs_gpa = -1ull;
315
316 if (unlikely(!kvm_hv_get_assist_page(vcpu, &assist_page)))
317 return false;
318
319 if (unlikely(!assist_page.enlighten_vmentry))
320 return false;
321
322 *evmcs_gpa = assist_page.current_nested_vmcs;
323
324 return true;
325 }
326
nested_get_evmcs_version(struct kvm_vcpu * vcpu)327 uint16_t nested_get_evmcs_version(struct kvm_vcpu *vcpu)
328 {
329 /*
330 * vmcs_version represents the range of supported Enlightened VMCS
331 * versions: lower 8 bits is the minimal version, higher 8 bits is the
332 * maximum supported version. KVM supports versions from 1 to
333 * KVM_EVMCS_VERSION.
334 */
335 if (kvm_cpu_cap_get(X86_FEATURE_VMX) &&
336 (!vcpu || to_vmx(vcpu)->nested.enlightened_vmcs_enabled))
337 return (KVM_EVMCS_VERSION << 8) | 1;
338
339 return 0;
340 }
341
nested_evmcs_filter_control_msr(u32 msr_index,u64 * pdata)342 void nested_evmcs_filter_control_msr(u32 msr_index, u64 *pdata)
343 {
344 u32 ctl_low = (u32)*pdata;
345 u32 ctl_high = (u32)(*pdata >> 32);
346
347 /*
348 * Hyper-V 2016 and 2019 try using these features even when eVMCS
349 * is enabled but there are no corresponding fields.
350 */
351 switch (msr_index) {
352 case MSR_IA32_VMX_EXIT_CTLS:
353 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
354 ctl_high &= ~VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL;
355 break;
356 case MSR_IA32_VMX_ENTRY_CTLS:
357 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
358 ctl_high &= ~VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL;
359 break;
360 case MSR_IA32_VMX_PROCBASED_CTLS2:
361 ctl_high &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
362 break;
363 }
364
365 *pdata = ctl_low | ((u64)ctl_high << 32);
366 }
367
nested_evmcs_check_controls(struct vmcs12 * vmcs12)368 int nested_evmcs_check_controls(struct vmcs12 *vmcs12)
369 {
370 int ret = 0;
371 u32 unsupp_ctl;
372
373 unsupp_ctl = vmcs12->pin_based_vm_exec_control &
374 EVMCS1_UNSUPPORTED_PINCTRL;
375 if (unsupp_ctl) {
376 trace_kvm_nested_vmenter_failed(
377 "eVMCS: unsupported pin-based VM-execution controls",
378 unsupp_ctl);
379 ret = -EINVAL;
380 }
381
382 unsupp_ctl = vmcs12->secondary_vm_exec_control &
383 EVMCS1_UNSUPPORTED_2NDEXEC;
384 if (unsupp_ctl) {
385 trace_kvm_nested_vmenter_failed(
386 "eVMCS: unsupported secondary VM-execution controls",
387 unsupp_ctl);
388 ret = -EINVAL;
389 }
390
391 unsupp_ctl = vmcs12->vm_exit_controls &
392 EVMCS1_UNSUPPORTED_VMEXIT_CTRL;
393 if (unsupp_ctl) {
394 trace_kvm_nested_vmenter_failed(
395 "eVMCS: unsupported VM-exit controls",
396 unsupp_ctl);
397 ret = -EINVAL;
398 }
399
400 unsupp_ctl = vmcs12->vm_entry_controls &
401 EVMCS1_UNSUPPORTED_VMENTRY_CTRL;
402 if (unsupp_ctl) {
403 trace_kvm_nested_vmenter_failed(
404 "eVMCS: unsupported VM-entry controls",
405 unsupp_ctl);
406 ret = -EINVAL;
407 }
408
409 unsupp_ctl = vmcs12->vm_function_control & EVMCS1_UNSUPPORTED_VMFUNC;
410 if (unsupp_ctl) {
411 trace_kvm_nested_vmenter_failed(
412 "eVMCS: unsupported VM-function controls",
413 unsupp_ctl);
414 ret = -EINVAL;
415 }
416
417 return ret;
418 }
419
nested_enable_evmcs(struct kvm_vcpu * vcpu,uint16_t * vmcs_version)420 int nested_enable_evmcs(struct kvm_vcpu *vcpu,
421 uint16_t *vmcs_version)
422 {
423 struct vcpu_vmx *vmx = to_vmx(vcpu);
424
425 vmx->nested.enlightened_vmcs_enabled = true;
426
427 if (vmcs_version)
428 *vmcs_version = nested_get_evmcs_version(vcpu);
429
430 return 0;
431 }
432