arch/x86/include/uapi/asm/kvm_para.h

   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
  58 struct 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
  71 struct 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 */
 100 struct kvm_mmu_op_header {
 101         __u32 op;
 102         __u32 pad;
 103 };
 104
 105 struct kvm_mmu_op_write_pte {
 106         struct kvm_mmu_op_header header;
 107         __u64 pte_phys;
 108         __u64 pte_val;
 109 };
 110
 111 struct kvm_mmu_op_flush_tlb {
 112         struct kvm_mmu_op_header header;
 113 };
 114
 115 struct 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
 123 struct 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 */