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
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#define KVM_FEATURE_ASYNC_PF_INT	14
35#define KVM_FEATURE_MSI_EXT_DEST_ID	15
36
37#define KVM_HINTS_REALTIME      0
38
39/* The last 8 bits are used to indicate how to interpret the flags field
40 * in pvclock structure. If no bits are set, all flags are ignored.
41 */
42#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT	24
43
44#define MSR_KVM_WALL_CLOCK  0x11
45#define MSR_KVM_SYSTEM_TIME 0x12
46
47#define KVM_MSR_ENABLED 1
48/* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
49#define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
50#define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
51#define MSR_KVM_ASYNC_PF_EN 0x4b564d02
52#define MSR_KVM_STEAL_TIME  0x4b564d03
53#define MSR_KVM_PV_EOI_EN      0x4b564d04
54#define MSR_KVM_POLL_CONTROL	0x4b564d05
55#define MSR_KVM_ASYNC_PF_INT	0x4b564d06
56#define MSR_KVM_ASYNC_PF_ACK	0x4b564d07
57
58struct kvm_steal_time {
59	__u64 steal;
60	__u32 version;
61	__u32 flags;
62	__u8  preempted;
63	__u8  u8_pad[3];
64	__u32 pad[11];
65};
66
67#define KVM_VCPU_PREEMPTED          (1 << 0)
68#define KVM_VCPU_FLUSH_TLB          (1 << 1)
69
70#define KVM_CLOCK_PAIRING_WALLCLOCK 0
71struct kvm_clock_pairing {
72	__s64 sec;
73	__s64 nsec;
74	__u64 tsc;
75	__u32 flags;
76	__u32 pad[9];
77};
78
79#define KVM_STEAL_ALIGNMENT_BITS 5
80#define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
81#define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
82
83#define KVM_MAX_MMU_OP_BATCH           32
84
85#define KVM_ASYNC_PF_ENABLED			(1 << 0)
86#define KVM_ASYNC_PF_SEND_ALWAYS		(1 << 1)
87#define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT	(1 << 2)
88#define KVM_ASYNC_PF_DELIVERY_AS_INT		(1 << 3)
89
90/* MSR_KVM_ASYNC_PF_INT */
91#define KVM_ASYNC_PF_VEC_MASK			GENMASK(7, 0)
92
93
94/* Operations for KVM_HC_MMU_OP */
95#define KVM_MMU_OP_WRITE_PTE            1
96#define KVM_MMU_OP_FLUSH_TLB	        2
97#define KVM_MMU_OP_RELEASE_PT	        3
98
99/* Payload for KVM_HC_MMU_OP */
100struct kvm_mmu_op_header {
101	__u32 op;
102	__u32 pad;
103};
104
105struct kvm_mmu_op_write_pte {
106	struct kvm_mmu_op_header header;
107	__u64 pte_phys;
108	__u64 pte_val;
109};
110
111struct kvm_mmu_op_flush_tlb {
112	struct kvm_mmu_op_header header;
113};
114
115struct kvm_mmu_op_release_pt {
116	struct kvm_mmu_op_header header;
117	__u64 pt_phys;
118};
119
120#define KVM_PV_REASON_PAGE_NOT_PRESENT 1
121#define KVM_PV_REASON_PAGE_READY 2
122
123struct kvm_vcpu_pv_apf_data {
124	/* Used for 'page not present' events delivered via #PF */
125	__u32 flags;
126
127	/* Used for 'page ready' events delivered via interrupt notification */
128	__u32 token;
129
130	__u8 pad[56];
131	__u32 enabled;
132};
133
134#define KVM_PV_EOI_BIT 0
135#define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
136#define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
137#define KVM_PV_EOI_DISABLED 0x0
138
139#endif /* _UAPI_ASM_X86_KVM_PARA_H */
140