xref: /linux/arch/x86/kvm/vmx/hyperv_evmcs.h (revision be239684b18e1cdcafcf8c7face4a2f562c745ad) 
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * This file contains common definitions for working with Enlightened VMCS which
4  * are used both by Hyper-V on KVM and KVM on Hyper-V.
5  */
6 #ifndef __KVM_X86_VMX_HYPERV_EVMCS_H
7 #define __KVM_X86_VMX_HYPERV_EVMCS_H
8 
9 #include <asm/hyperv-tlfs.h>
10 
11 #include "capabilities.h"
12 #include "vmcs12.h"
13 
14 #define KVM_EVMCS_VERSION 1
15 
16 /*
17  * Enlightened VMCSv1 doesn't support these:
18  *
19  *	POSTED_INTR_NV                  = 0x00000002,
20  *	GUEST_INTR_STATUS               = 0x00000810,
21  *	APIC_ACCESS_ADDR		= 0x00002014,
22  *	POSTED_INTR_DESC_ADDR           = 0x00002016,
23  *	EOI_EXIT_BITMAP0                = 0x0000201c,
24  *	EOI_EXIT_BITMAP1                = 0x0000201e,
25  *	EOI_EXIT_BITMAP2                = 0x00002020,
26  *	EOI_EXIT_BITMAP3                = 0x00002022,
27  *	GUEST_PML_INDEX			= 0x00000812,
28  *	PML_ADDRESS			= 0x0000200e,
29  *	VM_FUNCTION_CONTROL             = 0x00002018,
30  *	EPTP_LIST_ADDRESS               = 0x00002024,
31  *	VMREAD_BITMAP                   = 0x00002026,
32  *	VMWRITE_BITMAP                  = 0x00002028,
33  *
34  *	TSC_MULTIPLIER                  = 0x00002032,
35  *	PLE_GAP                         = 0x00004020,
36  *	PLE_WINDOW                      = 0x00004022,
37  *	VMX_PREEMPTION_TIMER_VALUE      = 0x0000482E,
38  *
39  * Currently unsupported in KVM:
40  *	GUEST_IA32_RTIT_CTL		= 0x00002814,
41  */
42 #define EVMCS1_SUPPORTED_PINCTRL					\
43 	(PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR |				\
44 	 PIN_BASED_EXT_INTR_MASK |					\
45 	 PIN_BASED_NMI_EXITING |					\
46 	 PIN_BASED_VIRTUAL_NMIS)
47 
48 #define EVMCS1_SUPPORTED_EXEC_CTRL					\
49 	(CPU_BASED_ALWAYSON_WITHOUT_TRUE_MSR |				\
50 	 CPU_BASED_HLT_EXITING |					\
51 	 CPU_BASED_CR3_LOAD_EXITING |					\
52 	 CPU_BASED_CR3_STORE_EXITING |					\
53 	 CPU_BASED_UNCOND_IO_EXITING |					\
54 	 CPU_BASED_MOV_DR_EXITING |					\
55 	 CPU_BASED_USE_TSC_OFFSETTING |					\
56 	 CPU_BASED_MWAIT_EXITING |					\
57 	 CPU_BASED_MONITOR_EXITING |					\
58 	 CPU_BASED_INVLPG_EXITING |					\
59 	 CPU_BASED_RDPMC_EXITING |					\
60 	 CPU_BASED_INTR_WINDOW_EXITING |				\
61 	 CPU_BASED_CR8_LOAD_EXITING |					\
62 	 CPU_BASED_CR8_STORE_EXITING |					\
63 	 CPU_BASED_RDTSC_EXITING |					\
64 	 CPU_BASED_TPR_SHADOW |						\
65 	 CPU_BASED_USE_IO_BITMAPS |					\
66 	 CPU_BASED_MONITOR_TRAP_FLAG |					\
67 	 CPU_BASED_USE_MSR_BITMAPS |					\
68 	 CPU_BASED_NMI_WINDOW_EXITING |					\
69 	 CPU_BASED_PAUSE_EXITING |					\
70 	 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS)
71 
72 #define EVMCS1_SUPPORTED_2NDEXEC					\
73 	(SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |			\
74 	 SECONDARY_EXEC_WBINVD_EXITING |				\
75 	 SECONDARY_EXEC_ENABLE_VPID |					\
76 	 SECONDARY_EXEC_ENABLE_EPT |					\
77 	 SECONDARY_EXEC_UNRESTRICTED_GUEST |				\
78 	 SECONDARY_EXEC_DESC |						\
79 	 SECONDARY_EXEC_ENABLE_RDTSCP |					\
80 	 SECONDARY_EXEC_ENABLE_INVPCID |				\
81 	 SECONDARY_EXEC_ENABLE_XSAVES |					\
82 	 SECONDARY_EXEC_RDSEED_EXITING |				\
83 	 SECONDARY_EXEC_RDRAND_EXITING |				\
84 	 SECONDARY_EXEC_TSC_SCALING |					\
85 	 SECONDARY_EXEC_ENABLE_USR_WAIT_PAUSE |				\
86 	 SECONDARY_EXEC_PT_USE_GPA |					\
87 	 SECONDARY_EXEC_PT_CONCEAL_VMX |				\
88 	 SECONDARY_EXEC_BUS_LOCK_DETECTION |				\
89 	 SECONDARY_EXEC_NOTIFY_VM_EXITING |				\
90 	 SECONDARY_EXEC_ENCLS_EXITING)
91 
92 #define EVMCS1_SUPPORTED_3RDEXEC (0ULL)
93 
94 #define EVMCS1_SUPPORTED_VMEXIT_CTRL					\
95 	(VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR |				\
96 	 VM_EXIT_SAVE_DEBUG_CONTROLS |					\
97 	 VM_EXIT_ACK_INTR_ON_EXIT |					\
98 	 VM_EXIT_HOST_ADDR_SPACE_SIZE |					\
99 	 VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL |				\
100 	 VM_EXIT_SAVE_IA32_PAT |					\
101 	 VM_EXIT_LOAD_IA32_PAT |					\
102 	 VM_EXIT_SAVE_IA32_EFER |					\
103 	 VM_EXIT_LOAD_IA32_EFER |					\
104 	 VM_EXIT_CLEAR_BNDCFGS |					\
105 	 VM_EXIT_PT_CONCEAL_PIP |					\
106 	 VM_EXIT_CLEAR_IA32_RTIT_CTL)
107 
108 #define EVMCS1_SUPPORTED_VMENTRY_CTRL					\
109 	(VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR |				\
110 	 VM_ENTRY_LOAD_DEBUG_CONTROLS |					\
111 	 VM_ENTRY_IA32E_MODE |						\
112 	 VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL |				\
113 	 VM_ENTRY_LOAD_IA32_PAT |					\
114 	 VM_ENTRY_LOAD_IA32_EFER |					\
115 	 VM_ENTRY_LOAD_BNDCFGS |					\
116 	 VM_ENTRY_PT_CONCEAL_PIP |					\
117 	 VM_ENTRY_LOAD_IA32_RTIT_CTL)
118 
119 #define EVMCS1_SUPPORTED_VMFUNC (0)
120 
121 struct evmcs_field {
122 	u16 offset;
123 	u16 clean_field;
124 };
125 
126 extern const struct evmcs_field vmcs_field_to_evmcs_1[];
127 extern const unsigned int nr_evmcs_1_fields;
128 
129 static __always_inline int evmcs_field_offset(unsigned long field,
130 					      u16 *clean_field)
131 {
132 	const struct evmcs_field *evmcs_field;
133 	unsigned int index = ROL16(field, 6);
134 
135 	if (unlikely(index >= nr_evmcs_1_fields))
136 		return -ENOENT;
137 
138 	evmcs_field = &vmcs_field_to_evmcs_1[index];
139 
140 	/*
141 	 * Use offset=0 to detect holes in eVMCS. This offset belongs to
142 	 * 'revision_id' but this field has no encoding and is supposed to
143 	 * be accessed directly.
144 	 */
145 	if (unlikely(!evmcs_field->offset))
146 		return -ENOENT;
147 
148 	if (clean_field)
149 		*clean_field = evmcs_field->clean_field;
150 
151 	return evmcs_field->offset;
152 }
153 
154 static inline u64 evmcs_read_any(struct hv_enlightened_vmcs *evmcs,
155 				 unsigned long field, u16 offset)
156 {
157 	/*
158 	 * vmcs12_read_any() doesn't care whether the supplied structure
159 	 * is 'struct vmcs12' or 'struct hv_enlightened_vmcs' as it takes
160 	 * the exact offset of the required field, use it for convenience
161 	 * here.
162 	 */
163 	return vmcs12_read_any((void *)evmcs, field, offset);
164 }
165 
166 #endif /* __KVM_X86_VMX_HYPERV_H */
167