1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef _ASM_X86_KVM_PARA_H
3 #define _ASM_X86_KVM_PARA_H
4 
5 #include "standard-headers/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 
12 /* This CPUID returns two feature bitmaps in eax, edx. Before enabling
13  * a particular paravirtualization, the appropriate feature bit should
14  * be checked in eax. The performance hint feature bit should be checked
15  * in edx.
16  */
17 #define KVM_CPUID_FEATURES	0x40000001
18 #define KVM_FEATURE_CLOCKSOURCE		0
19 #define KVM_FEATURE_NOP_IO_DELAY	1
20 #define KVM_FEATURE_MMU_OP		2
21 /* This indicates that the new set of kvmclock msrs
22  * are available. The use of 0x11 and 0x12 is deprecated
23  */
24 #define KVM_FEATURE_CLOCKSOURCE2        3
25 #define KVM_FEATURE_ASYNC_PF		4
26 #define KVM_FEATURE_STEAL_TIME		5
27 #define KVM_FEATURE_PV_EOI		6
28 #define KVM_FEATURE_PV_UNHALT		7
29 #define KVM_FEATURE_PV_TLB_FLUSH	9
30 #define KVM_FEATURE_ASYNC_PF_VMEXIT	10
31 #define KVM_FEATURE_PV_SEND_IPI	11
32 #define KVM_FEATURE_POLL_CONTROL	12
33 #define KVM_FEATURE_PV_SCHED_YIELD	13
34 
35 #define KVM_HINTS_REALTIME      0
36 
37 /* The last 8 bits are used to indicate how to interpret the flags field
38  * in pvclock structure. If no bits are set, all flags are ignored.
39  */
40 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT	24
41 
42 #define MSR_KVM_WALL_CLOCK  0x11
43 #define MSR_KVM_SYSTEM_TIME 0x12
44 
45 #define KVM_MSR_ENABLED 1
46 /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
47 #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
48 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
49 #define MSR_KVM_ASYNC_PF_EN 0x4b564d02
50 #define MSR_KVM_STEAL_TIME  0x4b564d03
51 #define MSR_KVM_PV_EOI_EN      0x4b564d04
52 #define MSR_KVM_POLL_CONTROL	0x4b564d05
53 
54 struct kvm_steal_time {
55 	uint64_t steal;
56 	uint32_t version;
57 	uint32_t flags;
58 	uint8_t  preempted;
59 	uint8_t  uint8_t_pad[3];
60 	uint32_t pad[11];
61 };
62 
63 #define KVM_VCPU_PREEMPTED          (1 << 0)
64 #define KVM_VCPU_FLUSH_TLB          (1 << 1)
65 
66 #define KVM_CLOCK_PAIRING_WALLCLOCK 0
67 struct kvm_clock_pairing {
68 	int64_t sec;
69 	int64_t nsec;
70 	uint64_t tsc;
71 	uint32_t flags;
72 	uint32_t pad[9];
73 };
74 
75 #define KVM_STEAL_ALIGNMENT_BITS 5
76 #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
77 #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
78 
79 #define KVM_MAX_MMU_OP_BATCH           32
80 
81 #define KVM_ASYNC_PF_ENABLED			(1 << 0)
82 #define KVM_ASYNC_PF_SEND_ALWAYS		(1 << 1)
83 #define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT	(1 << 2)
84 
85 /* Operations for KVM_HC_MMU_OP */
86 #define KVM_MMU_OP_WRITE_PTE            1
87 #define KVM_MMU_OP_FLUSH_TLB	        2
88 #define KVM_MMU_OP_RELEASE_PT	        3
89 
90 /* Payload for KVM_HC_MMU_OP */
91 struct kvm_mmu_op_header {
92 	uint32_t op;
93 	uint32_t pad;
94 };
95 
96 struct kvm_mmu_op_write_pte {
97 	struct kvm_mmu_op_header header;
98 	uint64_t pte_phys;
99 	uint64_t pte_val;
100 };
101 
102 struct kvm_mmu_op_flush_tlb {
103 	struct kvm_mmu_op_header header;
104 };
105 
106 struct kvm_mmu_op_release_pt {
107 	struct kvm_mmu_op_header header;
108 	uint64_t pt_phys;
109 };
110 
111 #define KVM_PV_REASON_PAGE_NOT_PRESENT 1
112 #define KVM_PV_REASON_PAGE_READY 2
113 
114 struct kvm_vcpu_pv_apf_data {
115 	uint32_t reason;
116 	uint8_t pad[60];
117 	uint32_t enabled;
118 };
119 
120 #define KVM_PV_EOI_BIT 0
121 #define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
122 #define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
123 #define KVM_PV_EOI_DISABLED 0x0
124 
125 #endif /* _ASM_X86_KVM_PARA_H */
126