text: /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  #ifndef _ASM_X86_KVM_PARA_H
  #define _ASM_X86_KVM_PARA_H
  
  #include "standard-headers/linux/types.h"
  
  /* This CPUID returns the signature 'KVMKVMKVM' in ebx, ecx, and edx.  It
   * should be used to determine that a VM is running under KVM.
   */
  #define KVM_CPUID_SIGNATURE	0x40000000
  
  /* This CPUID returns two feature bitmaps in eax, edx. Before enabling
   * a particular paravirtualization, the appropriate feature bit should
   * be checked in eax. The performance hint feature bit should be checked
   * in edx.
   */
  #define KVM_CPUID_FEATURES	0x40000001
  #define KVM_FEATURE_CLOCKSOURCE		0
  #define KVM_FEATURE_NOP_IO_DELAY	1
  #define KVM_FEATURE_MMU_OP		2
  /* This indicates that the new set of kvmclock msrs
   * are available. The use of 0x11 and 0x12 is deprecated
   */
  #define KVM_FEATURE_CLOCKSOURCE2        3
  #define KVM_FEATURE_ASYNC_PF		4
  #define KVM_FEATURE_STEAL_TIME		5
  #define KVM_FEATURE_PV_EOI		6
  #define KVM_FEATURE_PV_UNHALT		7
  #define KVM_FEATURE_PV_TLB_FLUSH	9
  #define KVM_FEATURE_ASYNC_PF_VMEXIT	10
  #define KVM_FEATURE_PV_SEND_IPI	11
  
  #define KVM_HINTS_REALTIME      0
  
  /* The last 8 bits are used to indicate how to interpret the flags field
   * in pvclock structure. If no bits are set, all flags are ignored.
   */
  #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT	24
  
  #define MSR_KVM_WALL_CLOCK  0x11
  #define MSR_KVM_SYSTEM_TIME 0x12
  
  #define KVM_MSR_ENABLED 1
  /* Custom MSRs falls in the range 0x4b564d00-0x4b564dff */
  #define MSR_KVM_WALL_CLOCK_NEW  0x4b564d00
  #define MSR_KVM_SYSTEM_TIME_NEW 0x4b564d01
  #define MSR_KVM_ASYNC_PF_EN 0x4b564d02
  #define MSR_KVM_STEAL_TIME  0x4b564d03
  #define MSR_KVM_PV_EOI_EN      0x4b564d04
  
  struct kvm_steal_time {
  	uint64_t steal;
  	uint32_t version;
  	uint32_t flags;
  	uint8_t  preempted;
  	uint8_t  uint8_t_pad[3];
  	uint32_t pad[11];
  };
  
  #define KVM_VCPU_PREEMPTED          (1 << 0)
  #define KVM_VCPU_FLUSH_TLB          (1 << 1)
  
  #define KVM_CLOCK_PAIRING_WALLCLOCK 0
  struct kvm_clock_pairing {
  	int64_t sec;
  	int64_t nsec;
  	uint64_t tsc;
  	uint32_t flags;
  	uint32_t pad[9];
  };
  
  #define KVM_STEAL_ALIGNMENT_BITS 5
  #define KVM_STEAL_VALID_BITS ((-1ULL << (KVM_STEAL_ALIGNMENT_BITS + 1)))
  #define KVM_STEAL_RESERVED_MASK (((1 << KVM_STEAL_ALIGNMENT_BITS) - 1 ) << 1)
  
  #define KVM_MAX_MMU_OP_BATCH           32
  
  #define KVM_ASYNC_PF_ENABLED			(1 << 0)
  #define KVM_ASYNC_PF_SEND_ALWAYS		(1 << 1)
  #define KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT	(1 << 2)
  
  /* Operations for KVM_HC_MMU_OP */
  #define KVM_MMU_OP_WRITE_PTE            1
  #define KVM_MMU_OP_FLUSH_TLB	        2
  #define KVM_MMU_OP_RELEASE_PT	        3
  
  /* Payload for KVM_HC_MMU_OP */
  struct kvm_mmu_op_header {
  	uint32_t op;
  	uint32_t pad;
  };
  
  struct kvm_mmu_op_write_pte {
  	struct kvm_mmu_op_header header;
  	uint64_t pte_phys;
  	uint64_t pte_val;
  };
  
  struct kvm_mmu_op_flush_tlb {
  	struct kvm_mmu_op_header header;
  };
  
  struct kvm_mmu_op_release_pt {
  	struct kvm_mmu_op_header header;
  	uint64_t pt_phys;
  };
  
  #define KVM_PV_REASON_PAGE_NOT_PRESENT 1
  #define KVM_PV_REASON_PAGE_READY 2
  
  struct kvm_vcpu_pv_apf_data {
  	uint32_t reason;
  	uint8_t pad[60];
  	uint32_t enabled;
  };
  
  #define KVM_PV_EOI_BIT 0
  #define KVM_PV_EOI_MASK (0x1 << KVM_PV_EOI_BIT)
  #define KVM_PV_EOI_ENABLED KVM_PV_EOI_MASK
  #define KVM_PV_EOI_DISABLED 0x0
  
  #endif /* _ASM_X86_KVM_PARA_H */
  