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 #define KVM_SIGNATURE "KVMKVMKVM\0\0\0"
  12
  13 /* This CPUID returns two feature bitmaps in eax, edx. Before enabling
  14  * a particular paravirtualization, the appropriate feature bit should
  15  * be checked in eax. The performance hint feature bit should be checked
  16  * in edx.
  17  */
  18 #define KVM_CPUID_FEATURES      0x40000001
  19 #define KVM_FEATURE_CLOCKSOURCE         0
  20 #define KVM_FEATURE_NOP_IO_DELAY        1
  21 #define KVM_FEATURE_MMU_OP              2
  22 /* This indicates that the new set of kvmclock msrs
  23  * are available. The use of 0x11 and 0x12 is deprecated
  24  */
  25 #define KVM_FEATURE_CLOCKSOURCE2        3
  26 #define KVM_FEATURE_ASYNC_PF            4
  27 #define KVM_FEATURE_STEAL_TIME          5
  28 #define KVM_FEATURE_PV_EOI              6
  29 #define KVM_FEATURE_PV_UNHALT           7
  30 #define KVM_FEATURE_PV_TLB_FLUSH        9
  31 #define KVM_FEATURE_ASYNC_PF_VMEXIT     10
  32 #define KVM_FEATURE_PV_SEND_IPI 11
  33 #define KVM_FEATURE_POLL_CONTROL        12
  34 #define KVM_FEATURE_PV_SCHED_YIELD      13
  35 #define KVM_FEATURE_ASYNC_PF_INT        14
  36 #define KVM_FEATURE_MSI_EXT_DEST_ID     15
  37 #define KVM_FEATURE_HC_MAP_GPA_RANGE    16
  38 #define KVM_FEATURE_MIGRATION_CONTROL   17
  39
  40 #define KVM_HINTS_REALTIME      0
  41
  42 /* The last 8 bits are used to indicate how to interpret the flags field
  43  * in pvclock structure. If no bits are set, all flags are ignored.
  44  */
  45 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT      24
  46
  47 #define MSR_KVM_WALL_CLOCK  0x11
  48 #define MSR_KVM_SYSTEM_TIME 0x12
  49
  50 #define KVM_MSR_ENABLED 1
  51 /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
  52 #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
  53 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
  54 #define MSR_KVM_ASYNC_PF_EN 0x4b564d02
  55 #define MSR_KVM_STEAL_TIME  0x4b564d03
  56 #define MSR_KVM_PV_EOI_EN      0x4b564d04
  57 #define MSR_KVM_POLL_CONTROL    0x4b564d05
  58 #define MSR_KVM_ASYNC_PF_INT    0x4b564d06
  59 #define MSR_KVM_ASYNC_PF_ACK    0x4b564d07
  60 #define MSR_KVM_MIGRATION_CONTROL       0x4b564d08
  61
  62 struct kvm_steal_time {
  63         __u64 steal;
  64         __u32 version;
  65         __u32 flags;
  66         __u8  preempted;
  67         __u8  u8_pad[3];
  68         __u32 pad[11];
  69 };
  70
  71 #define KVM_VCPU_PREEMPTED          (1 << 0)
  72 #define KVM_VCPU_FLUSH_TLB          (1 << 1)
  73
  74 #define KVM_CLOCK_PAIRING_WALLCLOCK 0
  75 struct kvm_clock_pairing {
  76         __s64 sec;
  77         __s64 nsec;
  78         __u64 tsc;
  79         __u32 flags;
  80         __u32 pad[9];
  81 };
  82
  83 #define KVM_STEAL_ALIGNMENT_BITS 5
  84 #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
  85 #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
  86
  87 #define KVM_MAX_MMU_OP_BATCH           32
  88
  89 #define KVM_ASYNC_PF_ENABLED                    (1 << 0)
  90 #define KVM_ASYNC_PF_SEND_ALWAYS                (1 << 1)
  91 #define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT      (1 << 2)
  92 #define KVM_ASYNC_PF_DELIVERY_AS_INT            (1 << 3)
  93
  94 /* MSR_KVM_ASYNC_PF_INT */
  95 #define KVM_ASYNC_PF_VEC_MASK                   __GENMASK(7, 0)
  96
  97 /* MSR_KVM_MIGRATION_CONTROL */
  98 #define KVM_MIGRATION_READY             (1 << 0)
  99
 100 /* KVM_HC_MAP_GPA_RANGE */
 101 #define KVM_MAP_GPA_RANGE_PAGE_SZ_4K    0
 102 #define KVM_MAP_GPA_RANGE_PAGE_SZ_2M    (1 << 0)
 103 #define KVM_MAP_GPA_RANGE_PAGE_SZ_1G    (1 << 1)
 104 #define KVM_MAP_GPA_RANGE_ENC_STAT(n)   (n << 4)
 105 #define KVM_MAP_GPA_RANGE_ENCRYPTED     KVM_MAP_GPA_RANGE_ENC_STAT(1)
 106 #define KVM_MAP_GPA_RANGE_DECRYPTED     KVM_MAP_GPA_RANGE_ENC_STAT(0)
 107
 108 /* Operations for KVM_HC_MMU_OP */
 109 #define KVM_MMU_OP_WRITE_PTE            1
 110 #define KVM_MMU_OP_FLUSH_TLB            2
 111 #define KVM_MMU_OP_RELEASE_PT           3
 112
 113 /* Payload for KVM_HC_MMU_OP */
 114 struct kvm_mmu_op_header {
 115         __u32 op;
 116         __u32 pad;
 117 };
 118
 119 struct kvm_mmu_op_write_pte {
 120         struct kvm_mmu_op_header header;
 121         __u64 pte_phys;
 122         __u64 pte_val;
 123 };
 124
 125 struct kvm_mmu_op_flush_tlb {
 126         struct kvm_mmu_op_header header;
 127 };
 128
 129 struct kvm_mmu_op_release_pt {
 130         struct kvm_mmu_op_header header;
 131         __u64 pt_phys;
 132 };
 133
 134 #define KVM_PV_REASON_PAGE_NOT_PRESENT 1
 135 #define KVM_PV_REASON_PAGE_READY 2
 136
 137 struct kvm_vcpu_pv_apf_data {
 138         /* Used for 'page not present' events delivered via #PF */
 139         __u32 flags;
 140
 141         /* Used for 'page ready' events delivered via interrupt notification */
 142         __u32 token;
 143
 144         __u8 pad[56];
 145 };
 146
 147 #define KVM_PV_EOI_BIT 0
 148 #define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
 149 #define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
 150 #define KVM_PV_EOI_DISABLED 0x0
 151
 152 #endif /* _UAPI_ASM_X86_KVM_PARA_H */