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
34#define KVM_HINTS_REALTIME 0
35
36/* The last 8 bits are used to indicate how to interpret the flags field
37 * in pvclock structure. If no bits are set, all flags are ignored.
38 */
39#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 24
40
41#define MSR_KVM_WALL_CLOCK 0x11
42#define MSR_KVM_SYSTEM_TIME 0x12
43
44#define KVM_MSR_ENABLED 1
45/* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
46#define MSR_KVM_WALL_CLOCK_NEW 0x4b564d00
47#define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
48#define MSR_KVM_ASYNC_PF_EN 0x4b564d02
49#define MSR_KVM_STEAL_TIME 0x4b564d03
50#define MSR_KVM_PV_EOI_EN 0x4b564d04
51#define MSR_KVM_POLL_CONTROL 0x4b564d05
52
53struct kvm_steal_time {
54 uint64_t steal;
55 uint32_t version;
56 uint32_t flags;
57 uint8_t preempted;
58 uint8_t uint8_t_pad[3];
59 uint32_t pad[11];
60};
61
62#define KVM_VCPU_PREEMPTED (1 << 0)
63#define KVM_VCPU_FLUSH_TLB (1 << 1)
64
65#define KVM_CLOCK_PAIRING_WALLCLOCK 0
66struct kvm_clock_pairing {
67 int64_t sec;
68 int64_t nsec;
69 uint64_t tsc;
70 uint32_t flags;
71 uint32_t pad[9];
72};
73
74#define KVM_STEAL_ALIGNMENT_BITS 5
75#define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
76#define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
77
78#define KVM_MAX_MMU_OP_BATCH 32
79
80#define KVM_ASYNC_PF_ENABLED (1 << 0)
81#define KVM_ASYNC_PF_SEND_ALWAYS (1 << 1)
82#define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT (1 << 2)
83
84/* Operations for KVM_HC_MMU_OP */
85#define KVM_MMU_OP_WRITE_PTE 1
86#define KVM_MMU_OP_FLUSH_TLB 2
87#define KVM_MMU_OP_RELEASE_PT 3
88
89/* Payload for KVM_HC_MMU_OP */
90struct kvm_mmu_op_header {
91 uint32_t op;
92 uint32_t pad;
93};
94
95struct kvm_mmu_op_write_pte {
96 struct kvm_mmu_op_header header;
97 uint64_t pte_phys;
98 uint64_t pte_val;
99};
100
101struct kvm_mmu_op_flush_tlb {
102 struct kvm_mmu_op_header header;
103};
104
105struct kvm_mmu_op_release_pt {
106 struct kvm_mmu_op_header header;
107 uint64_t pt_phys;
108};
109
110#define KVM_PV_REASON_PAGE_NOT_PRESENT 1
111#define KVM_PV_REASON_PAGE_READY 2
112
113struct kvm_vcpu_pv_apf_data {
114 uint32_t reason;
115 uint8_t pad[60];
116 uint32_t enabled;
117};
118
119#define KVM_PV_EOI_BIT 0
120#define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
121#define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
122#define KVM_PV_EOI_DISABLED 0x0
123
124#endif /* _ASM_X86_KVM_PARA_H */
125