include/hyperv/hvgdk_ext.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Type definitions for the Microsoft Hypervisor.
   4  */
   5 #ifndef _HV_HVGDK_EXT_H
   6 #define _HV_HVGDK_EXT_H
   7
   8 #include "hvgdk_mini.h"
   9
  10 /* Extended hypercalls */
  11 #define HV_EXT_CALL_QUERY_CAPABILITIES          0x8001
  12 #define HV_EXT_CALL_MEMORY_HEAT_HINT            0x8003
  13
  14 /* Extended hypercalls */
  15 enum {          /* HV_EXT_CALL */
  16         HV_EXTCALL_QUERY_CAPABILITIES = 0x8001,
  17         HV_EXTCALL_MEMORY_HEAT_HINT   = 0x8003,
  18 };
  19
  20 /* HV_EXT_OUTPUT_QUERY_CAPABILITIES */
  21 #define HV_EXT_CAPABILITY_MEMORY_COLD_DISCARD_HINT BIT(8)
  22
  23 enum {          /* HV_EXT_MEMORY_HEAT_HINT_TYPE */
  24         HV_EXTMEM_HEAT_HINT_COLD = 0,
  25         HV_EXTMEM_HEAT_HINT_HOT = 1,
  26         HV_EXTMEM_HEAT_HINT_COLD_DISCARD = 2,
  27         HV_EXTMEM_HEAT_HINT_MAX
  28 };
  29
  30 /*
  31  * The whole argument should fit in a page to be able to pass to the hypervisor
  32  * in one hypercall.
  33  */
  34 #define HV_MEMORY_HINT_MAX_GPA_PAGE_RANGES  \
  35         ((HV_HYP_PAGE_SIZE - sizeof(struct hv_memory_hint)) / \
  36                 sizeof(union hv_gpa_page_range))
  37
  38 /* HvExtCallMemoryHeatHint hypercall */
  39 #define HV_EXT_MEMORY_HEAT_HINT_TYPE_COLD_DISCARD       2
  40 struct hv_memory_hint {         /* HV_EXT_INPUT_MEMORY_HEAT_HINT */
  41         u64 heat_type : 2;      /* HV_EXTMEM_HEAT_HINT_* */
  42         u64 reserved : 62;
  43         union hv_gpa_page_range ranges[];
  44 } __packed;
  45
  46 #endif /* _HV_HVGDK_EXT_H */