xref: /openbmc/linux/arch/x86/include/uapi/asm/kvm_para.h (revision 760849b1)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _UAPI_ASM_X86_KVM_PARA_H
3 #define _UAPI_ASM_X86_KVM_PARA_H
4 
5 #include <linux/types.h>
6 
7 /* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx.  It
8  * should be used to determine that a VM is running under KVM.
9  */
10 #define KVM_CPUID_SIGNATURE	0x40000000
11 #define KVM_SIGNATURE "KVMKVMKVM\0\0\0"
12 
13 /* This CPUID returns two feature bitmaps in eax, edx. Before enabling
14  * a particular paravirtualization, the appropriate feature bit should
15  * be checked in eax. The performance hint feature bit should be checked
16  * in edx.
17  */
18 #define KVM_CPUID_FEATURES	0x40000001
19 #define KVM_FEATURE_CLOCKSOURCE		0
20 #define KVM_FEATURE_NOP_IO_DELAY	1
21 #define KVM_FEATURE_MMU_OP		2
22 /* This indicates that the new set of kvmclock msrs
23  * are available. The use of 0x11 and 0x12 is deprecated
24  */
25 #define KVM_FEATURE_CLOCKSOURCE2        3
26 #define KVM_FEATURE_ASYNC_PF		4
27 #define KVM_FEATURE_STEAL_TIME		5
28 #define KVM_FEATURE_PV_EOI		6
29 #define KVM_FEATURE_PV_UNHALT		7
30 #define KVM_FEATURE_PV_TLB_FLUSH	9
31 #define KVM_FEATURE_ASYNC_PF_VMEXIT	10
32 #define KVM_FEATURE_PV_SEND_IPI	11
33 #define KVM_FEATURE_POLL_CONTROL	12
34 #define KVM_FEATURE_PV_SCHED_YIELD	13
35 #define KVM_FEATURE_ASYNC_PF_INT	14
36 #define KVM_FEATURE_MSI_EXT_DEST_ID	15
37 #define KVM_FEATURE_HC_MAP_GPA_RANGE	16
38 #define KVM_FEATURE_MIGRATION_CONTROL	17
39 
40 #define KVM_HINTS_REALTIME      0
41 
42 /* The last 8 bits are used to indicate how to interpret the flags field
43  * in pvclock structure. If no bits are set, all flags are ignored.
44  */
45 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT	24
46 
47 #define MSR_KVM_WALL_CLOCK  0x11
48 #define MSR_KVM_SYSTEM_TIME 0x12
49 
50 #define KVM_MSR_ENABLED 1
51 /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
52 #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
53 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
54 #define MSR_KVM_ASYNC_PF_EN 0x4b564d02
55 #define MSR_KVM_STEAL_TIME  0x4b564d03
56 #define MSR_KVM_PV_EOI_EN      0x4b564d04
57 #define MSR_KVM_POLL_CONTROL	0x4b564d05
58 #define MSR_KVM_ASYNC_PF_INT	0x4b564d06
59 #define MSR_KVM_ASYNC_PF_ACK	0x4b564d07
60 #define MSR_KVM_MIGRATION_CONTROL	0x4b564d08
61 
62 struct kvm_steal_time {
63 	__u64 steal;
64 	__u32 version;
65 	__u32 flags;
66 	__u8  preempted;
67 	__u8  u8_pad[3];
68 	__u32 pad[11];
69 };
70 
71 #define KVM_VCPU_PREEMPTED          (1 << 0)
72 #define KVM_VCPU_FLUSH_TLB          (1 << 1)
73 
74 #define KVM_CLOCK_PAIRING_WALLCLOCK 0
75 struct kvm_clock_pairing {
76 	__s64 sec;
77 	__s64 nsec;
78 	__u64 tsc;
79 	__u32 flags;
80 	__u32 pad[9];
81 };
82 
83 #define KVM_STEAL_ALIGNMENT_BITS 5
84 #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
85 #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
86 
87 #define KVM_MAX_MMU_OP_BATCH           32
88 
89 #define KVM_ASYNC_PF_ENABLED			(1 << 0)
90 #define KVM_ASYNC_PF_SEND_ALWAYS		(1 << 1)
91 #define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT	(1 << 2)
92 #define KVM_ASYNC_PF_DELIVERY_AS_INT		(1 << 3)
93 
94 /* MSR_KVM_ASYNC_PF_INT */
95 #define KVM_ASYNC_PF_VEC_MASK			GENMASK(7, 0)
96 
97 /* MSR_KVM_MIGRATION_CONTROL */
98 #define KVM_MIGRATION_READY		(1 << 0)
99 
100 /* KVM_HC_MAP_GPA_RANGE */
101 #define KVM_MAP_GPA_RANGE_PAGE_SZ_4K	0
102 #define KVM_MAP_GPA_RANGE_PAGE_SZ_2M	(1 << 0)
103 #define KVM_MAP_GPA_RANGE_PAGE_SZ_1G	(1 << 1)
104 #define KVM_MAP_GPA_RANGE_ENC_STAT(n)	(n << 4)
105 #define KVM_MAP_GPA_RANGE_ENCRYPTED	KVM_MAP_GPA_RANGE_ENC_STAT(1)
106 #define KVM_MAP_GPA_RANGE_DECRYPTED	KVM_MAP_GPA_RANGE_ENC_STAT(0)
107 
108 /* Operations for KVM_HC_MMU_OP */
109 #define KVM_MMU_OP_WRITE_PTE            1
110 #define KVM_MMU_OP_FLUSH_TLB	        2
111 #define KVM_MMU_OP_RELEASE_PT	        3
112 
113 /* Payload for KVM_HC_MMU_OP */
114 struct kvm_mmu_op_header {
115 	__u32 op;
116 	__u32 pad;
117 };
118 
119 struct kvm_mmu_op_write_pte {
120 	struct kvm_mmu_op_header header;
121 	__u64 pte_phys;
122 	__u64 pte_val;
123 };
124 
125 struct kvm_mmu_op_flush_tlb {
126 	struct kvm_mmu_op_header header;
127 };
128 
129 struct kvm_mmu_op_release_pt {
130 	struct kvm_mmu_op_header header;
131 	__u64 pt_phys;
132 };
133 
134 #define KVM_PV_REASON_PAGE_NOT_PRESENT 1
135 #define KVM_PV_REASON_PAGE_READY 2
136 
137 struct kvm_vcpu_pv_apf_data {
138 	/* Used for 'page not present' events delivered via #PF */
139 	__u32 flags;
140 
141 	/* Used for 'page ready' events delivered via interrupt notification */
142 	__u32 token;
143 
144 	__u8 pad[56];
145 	__u32 enabled;
146 };
147 
148 #define KVM_PV_EOI_BIT 0
149 #define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
150 #define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
151 #define KVM_PV_EOI_DISABLED 0x0
152 
153 #endif /* _UAPI_ASM_X86_KVM_PARA_H */
154