include/standard-headers/asm-x86/kvm_para.h

   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
  32 #define KVM_HINTS_REALTIME      0
  33
  34 /* The last 8 bits are used to indicate how to interpret the flags field
  35  * in pvclock structure. If no bits are set, all flags are ignored.
  36  */
  37 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT      24
  38
  39 #define MSR_KVM_WALL_CLOCK  0x11
  40 #define MSR_KVM_SYSTEM_TIME 0x12
  41
  42 #define KVM_MSR_ENABLED 1
  43 /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
  44 #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
  45 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
  46 #define MSR_KVM_ASYNC_PF_EN 0x4b564d02
  47 #define MSR_KVM_STEAL_TIME  0x4b564d03
  48 #define MSR_KVM_PV_EOI_EN      0x4b564d04
  49
  50 struct kvm_steal_time {
  51         uint64_t steal;
  52         uint32_t version;
  53         uint32_t flags;
  54         uint8_t  preempted;
  55         uint8_t  uint8_t_pad[3];
  56         uint32_t pad[11];
  57 };
  58
  59 #define KVM_VCPU_PREEMPTED          (1 << 0)
  60 #define KVM_VCPU_FLUSH_TLB          (1 << 1)
  61
  62 #define KVM_CLOCK_PAIRING_WALLCLOCK 0
  63 struct kvm_clock_pairing {
  64         int64_t sec;
  65         int64_t nsec;
  66         uint64_t tsc;
  67         uint32_t flags;
  68         uint32_t pad[9];
  69 };
  70
  71 #define KVM_STEAL_ALIGNMENT_BITS 5
  72 #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
  73 #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
  74
  75 #define KVM_MAX_MMU_OP_BATCH           32
  76
  77 #define KVM_ASYNC_PF_ENABLED                    (1 << 0)
  78 #define KVM_ASYNC_PF_SEND_ALWAYS                (1 << 1)
  79 #define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT      (1 << 2)
  80
  81 /* Operations for KVM_HC_MMU_OP */
  82 #define KVM_MMU_OP_WRITE_PTE            1
  83 #define KVM_MMU_OP_FLUSH_TLB            2
  84 #define KVM_MMU_OP_RELEASE_PT           3
  85
  86 /* Payload for KVM_HC_MMU_OP */
  87 struct kvm_mmu_op_header {
  88         uint32_t op;
  89         uint32_t pad;
  90 };
  91
  92 struct kvm_mmu_op_write_pte {
  93         struct kvm_mmu_op_header header;
  94         uint64_t pte_phys;
  95         uint64_t pte_val;
  96 };
  97
  98 struct kvm_mmu_op_flush_tlb {
  99         struct kvm_mmu_op_header header;
 100 };
 101
 102 struct kvm_mmu_op_release_pt {
 103         struct kvm_mmu_op_header header;
 104         uint64_t pt_phys;
 105 };
 106
 107 #define KVM_PV_REASON_PAGE_NOT_PRESENT 1
 108 #define KVM_PV_REASON_PAGE_READY 2
 109
 110 struct kvm_vcpu_pv_apf_data {
 111         uint32_t reason;
 112         uint8_t pad[60];
 113         uint32_t enabled;
 114 };
 115
 116 #define KVM_PV_EOI_BIT 0
 117 #define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
 118 #define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
 119 #define KVM_PV_EOI_DISABLED 0x0
 120
 121 #endif /* _ASM_X86_KVM_PARA_H */