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
33#define KVM_HINTS_REALTIME 0
34
35/* The last 8 bits are used to indicate how to interpret the flags field
36 * in pvclock structure. If no bits are set, all flags are ignored.
37 */
38#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 24
39
40#define MSR_KVM_WALL_CLOCK 0x11
41#define MSR_KVM_SYSTEM_TIME 0x12
42
43#define KVM_MSR_ENABLED 1
44/* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
45#define MSR_KVM_WALL_CLOCK_NEW 0x4b564d00
46#define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
47#define MSR_KVM_ASYNC_PF_EN 0x4b564d02
48#define MSR_KVM_STEAL_TIME 0x4b564d03
49#define MSR_KVM_PV_EOI_EN 0x4b564d04
50
51struct kvm_steal_time {
52 __u64 steal;
53 __u32 version;
54 __u32 flags;
55 __u8 preempted;
56 __u8 u8_pad[3];
57 __u32 pad[11];
58};
59
60#define KVM_VCPU_PREEMPTED (1 << 0)
61#define KVM_VCPU_FLUSH_TLB (1 << 1)
62
63#define KVM_CLOCK_PAIRING_WALLCLOCK 0
64struct kvm_clock_pairing {
65 __s64 sec;
66 __s64 nsec;
67 __u64 tsc;
68 __u32 flags;
69 __u32 pad[9];
70};
71
72#define KVM_STEAL_ALIGNMENT_BITS 5
73#define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
74#define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
75
76#define KVM_MAX_MMU_OP_BATCH 32
77
78#define KVM_ASYNC_PF_ENABLED (1 << 0)
79#define KVM_ASYNC_PF_SEND_ALWAYS (1 << 1)
80#define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT (1 << 2)
81
82/* Operations for KVM_HC_MMU_OP */
83#define KVM_MMU_OP_WRITE_PTE 1
84#define KVM_MMU_OP_FLUSH_TLB 2
85#define KVM_MMU_OP_RELEASE_PT 3
86
87/* Payload for KVM_HC_MMU_OP */
88struct kvm_mmu_op_header {
89 __u32 op;
90 __u32 pad;
91};
92
93struct kvm_mmu_op_write_pte {
94 struct kvm_mmu_op_header header;
95 __u64 pte_phys;
96 __u64 pte_val;
97};
98
99struct kvm_mmu_op_flush_tlb {
100 struct kvm_mmu_op_header header;
101};
102
103struct kvm_mmu_op_release_pt {
104 struct kvm_mmu_op_header header;
105 __u64 pt_phys;
106};
107
108#define KVM_PV_REASON_PAGE_NOT_PRESENT 1
109#define KVM_PV_REASON_PAGE_READY 2
110
111struct kvm_vcpu_pv_apf_data {
112 __u32 reason;
113 __u8 pad[60];
114 __u32 enabled;
115};
116
117#define KVM_PV_EOI_BIT 0
118#define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
119#define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
120#define KVM_PV_EOI_DISABLED 0x0
121
122#endif /* _UAPI_ASM_X86_KVM_PARA_H */
123