LXR linux/arch/x86/include/uapi/asm/kvm

   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#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#define KVM_FEATURE_PV_TLB_FLUSH        9
  29#define KVM_FEATURE_ASYNC_PF_VMEXIT     10
  30
  31/* The last 8 bits are used to indicate how to interpret the flags field
  32 * in pvclock structure. If no bits are set, all flags are ignored.
  33 */
  34#define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT      24
  35
  36#define MSR_KVM_WALL_CLOCK  0x11
  37#define MSR_KVM_SYSTEM_TIME 0x12
  38
  39#define KVM_MSR_ENABLED 1
  40/* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
  41#define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
  42#define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
  43#define MSR_KVM_ASYNC_PF_EN 0x4b564d02
  44#define MSR_KVM_STEAL_TIME  0x4b564d03
  45#define MSR_KVM_PV_EOI_EN      0x4b564d04
  46
  47struct kvm_steal_time {
  48        __u64 steal;
  49        __u32 version;
  50        __u32 flags;
  51        __u8  preempted;
  52        __u8  u8_pad[3];
  53        __u32 pad[11];
  54};
  55
  56#define KVM_VCPU_PREEMPTED          (1 << 0)
  57#define KVM_VCPU_FLUSH_TLB          (1 << 1)
  58
  59#define KVM_CLOCK_PAIRING_WALLCLOCK 0
  60struct kvm_clock_pairing {
  61        __s64 sec;
  62        __s64 nsec;
  63        __u64 tsc;
  64        __u32 flags;
  65        __u32 pad[9];
  66};
  67
  68#define KVM_STEAL_ALIGNMENT_BITS 5
  69#define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
  70#define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
  71
  72#define KVM_MAX_MMU_OP_BATCH           32
  73
  74#define KVM_ASYNC_PF_ENABLED                    (1 << 0)
  75#define KVM_ASYNC_PF_SEND_ALWAYS                (1 << 1)
  76#define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT      (1 << 2)
  77
  78/* Operations for KVM_HC_MMU_OP */
  79#define KVM_MMU_OP_WRITE_PTE            1
  80#define KVM_MMU_OP_FLUSH_TLB            2
  81#define KVM_MMU_OP_RELEASE_PT           3
  82
  83/* Payload for KVM_HC_MMU_OP */
  84struct kvm_mmu_op_header {
  85        __u32 op;
  86        __u32 pad;
  87};
  88
  89struct kvm_mmu_op_write_pte {
  90        struct kvm_mmu_op_header header;
  91        __u64 pte_phys;
  92        __u64 pte_val;
  93};
  94
  95struct kvm_mmu_op_flush_tlb {
  96        struct kvm_mmu_op_header header;
  97};
  98
  99struct kvm_mmu_op_release_pt {
 100        struct kvm_mmu_op_header header;
 101        __u64 pt_phys;
 102};
 103
 104#define KVM_PV_REASON_PAGE_NOT_PRESENT 1
 105#define KVM_PV_REASON_PAGE_READY 2
 106
 107struct kvm_vcpu_pv_apf_data {
 108        __u32 reason;
 109        __u8 pad[60];
 110        __u32 enabled;
 111};
 112
 113#define KVM_PV_EOI_BIT 0
 114#define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
 115#define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
 116#define KVM_PV_EOI_DISABLED 0x0
 117
 118#endif /* _UAPI_ASM_X86_KVM_PARA_H */
 119