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HvExtCallQueryCapabilities

  • Article

This hypercall reports the availability of extended hypercalls.

The availability of this hypercall must be queried using the EnableExtendedHypercalls partition privilege flag.

Interface

HV_STATUS
HvExtCallQueryCapabilities(
   _Out_ UINT64 Capabilities
   );

Call Code

0x8001 (Simple)

Output Parameters

Name Offset Size Information Provided
Capabilities 0 8 Bitmask of supported extended hypercalls

The bitmask of supported extended hypercalls has the following format:

Bit Extended Hypercall
0 HvExtCallGetBootZeroedMemory
1 HvExtCallMemoryHeatHint
2 HvExtCallEpfSetup
3 HvExtCallSchedulerAssistSetup
4 HvExtCallMemoryHeatHintAsync
63-5 Reserved