linux-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 <linux/types.h>
   6 #include <asm/hyperv.h>
   7
   8 /* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx.  It
   9  * should be used to determine that a VM is running under KVM.
  10  */
  11 #define KVM_CPUID_SIGNATURE     0x40000000
  12
  13 /* This CPUID returns a feature bitmap in eax.  Before enabling a particular
  14  * paravirtualization, the appropriate feature bit should be checked.
  15  */
  16 #define KVM_CPUID_FEATURES      0x40000001
  17 #define KVM_FEATURE_CLOCKSOURCE         0
  18 #define KVM_FEATURE_NOP_IO_DELAY        1
  19 #define KVM_FEATURE_MMU_OP              2
  20 /* This indicates that the new set of kvmclock msrs
  21  * are available. The use of 0x11 and 0x12 is deprecated
  22  */
  23 #define KVM_FEATURE_CLOCKSOURCE2        3
  24 #define KVM_FEATURE_ASYNC_PF            4
  25 #define KVM_FEATURE_STEAL_TIME          5
  26 #define KVM_FEATURE_PV_EOI              6
  27 #define KVM_FEATURE_PV_UNHALT           7
  28
  29 /* The last 8 bits are used to indicate how to interpret the flags field
  30  * in pvclock structure. If no bits are set, all flags are ignored.
  31  */
  32 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT      24
  33
  34 #define MSR_KVM_WALL_CLOCK  0x11
  35 #define MSR_KVM_SYSTEM_TIME 0x12
  36
  37 #define KVM_MSR_ENABLED 1
  38 /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
  39 #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
  40 #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
  41 #define MSR_KVM_ASYNC_PF_EN 0x4b564d02
  42 #define MSR_KVM_STEAL_TIME  0x4b564d03
  43 #define MSR_KVM_PV_EOI_EN      0x4b564d04
  44
  45 struct kvm_steal_time {
  46         __u64 steal;
  47         __u32 version;
  48         __u32 flags;
  49         __u8  preempted;
  50         __u8  u8_pad[3];
  51         __u32 pad[11];
  52 };
  53
  54 #define KVM_CLOCK_PAIRING_WALLCLOCK 0
  55 struct kvm_clock_pairing {
  56         __s64 sec;
  57         __s64 nsec;
  58         __u64 tsc;
  59         __u32 flags;
  60         __u32 pad[9];
  61 };
  62
  63 #define KVM_STEAL_ALIGNMENT_BITS 5
  64 #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
  65 #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
  66
  67 #define KVM_MAX_MMU_OP_BATCH           32
  68
  69 #define KVM_ASYNC_PF_ENABLED                    (1 << 0)
  70 #define KVM_ASYNC_PF_SEND_ALWAYS                (1 << 1)
  71 #define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT      (1 << 2)
  72
  73 /* Operations for KVM_HC_MMU_OP */
  74 #define KVM_MMU_OP_WRITE_PTE            1
  75 #define KVM_MMU_OP_FLUSH_TLB            2
  76 #define KVM_MMU_OP_RELEASE_PT           3
  77
  78 /* Payload for KVM_HC_MMU_OP */
  79 struct kvm_mmu_op_header {
  80         __u32 op;
  81         __u32 pad;
  82 };
  83
  84 struct kvm_mmu_op_write_pte {
  85         struct kvm_mmu_op_header header;
  86         __u64 pte_phys;
  87         __u64 pte_val;
  88 };
  89
  90 struct kvm_mmu_op_flush_tlb {
  91         struct kvm_mmu_op_header header;
  92 };
  93
  94 struct kvm_mmu_op_release_pt {
  95         struct kvm_mmu_op_header header;
  96         __u64 pt_phys;
  97 };
  98
  99 #define KVM_PV_REASON_PAGE_NOT_PRESENT 1
 100 #define KVM_PV_REASON_PAGE_READY 2
 101
 102 struct kvm_vcpu_pv_apf_data {
 103         __u32 reason;
 104         __u8 pad[60];
 105         __u32 enabled;
 106 };
 107
 108 #define KVM_PV_EOI_BIT 0
 109 #define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
 110 #define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
 111 #define KVM_PV_EOI_DISABLED 0x0
 112
 113 #endif /* _ASM_X86_KVM_PARA_H */