CrossVmcalls.c File Reference

Routines relating to cross (standalone) VMCALLs. More...

#include "pch.h"

Functions
UINT64	CrossVmcallGetDebugctlVmcallOnTargetCore ()
	Get the guest state of IA32_DEBUGCTL on the target core from VMCS using VMCALL.
UINT64	CrossVmcallGetGuestIa32LbrCtlVmcallOnTargetCore ()
	Get the guest state of IA32_LBR_CTL on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetDebugctlVmcallOnTargetCore (UINT64 Value)
	Set the guest state of IA32_DEBUGCTL on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetGuestIa32LbrCtlVmcallOnTargetCore (UINT64 Value)
	Set the guest state of IA32_LBR_CTL on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetLbrSelectVmcallOnTargetCore (UINT64 FilterOptions)
	Set the guest state of MSR_LEGACY_LBR_SELECT on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetLoadDebugControlsVmcallOnTargetCore (BOOLEAN Set)
	Set LOAD DEBUG CONTROLS on Vm-entry controls on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetLoadGuestIa32LbrCtlVmcallOnTargetCore (BOOLEAN Set)
	Set CLEAR GUEST IA32_LBR_CTL on Vm-entry controls on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetSaveDebugControlsVmcallOnTargetCore (BOOLEAN Set)
	Set SAVE DEBUG CONTROLS on Vm-exit controls on the target core from VMCS using VMCALL.
VOID	CrossVmcallSetClearGuestIa32LbrCtlVmcallOnTargetCore (BOOLEAN Set)
	Set CLEAR GUEST IA32_LBR_CTL on Vm-exit controls on the target core from VMCS using VMCALL.

Detailed Description

Routines relating to cross (standalone) VMCALLs.

Author

Sina Karvandi (sina@.nosp@m.hype.nosp@m.rdbg..nosp@m.org)

Version

0.19

Date

2026-04-14

Copyright

This project is released under the GNU Public License v3.

Function Documentation

CrossVmcallGetDebugctlVmcallOnTargetCore()

UINT64 CrossVmcallGetDebugctlVmcallOnTargetCore

(

)

Get the guest state of IA32_DEBUGCTL on the target core from VMCS using VMCALL.

Returns

UINT64

{
    UINT64 DebugctlValue;
    AsmVmxVmcall(VMCALL_GET_VMCS_DEBUGCTL, (UINT64)&DebugctlValue, NULL64_ZERO, NULL64_ZERO);
    return DebugctlValue;
}

CrossVmcallGetGuestIa32LbrCtlVmcallOnTargetCore()

UINT64 CrossVmcallGetGuestIa32LbrCtlVmcallOnTargetCore

(

)

Get the guest state of IA32_LBR_CTL on the target core from VMCS using VMCALL.

Returns

UINT64

{
    UINT64 GuestIa32LbrCtlValue;
    AsmVmxVmcall(VMCALL_GET_GUEST_IA32_LBR_CTL, (UINT64)&GuestIa32LbrCtlValue, NULL64_ZERO, NULL64_ZERO);
    return GuestIa32LbrCtlValue;
}

CrossVmcallSetClearGuestIa32LbrCtlVmcallOnTargetCore()

VOID CrossVmcallSetClearGuestIa32LbrCtlVmcallOnTargetCore

(

BOOLEAN

Set

)

Set CLEAR GUEST IA32_LBR_CTL on Vm-exit controls on the target core from VMCS using VMCALL.

Parameters

Set	Set or unset

Returns

VOID

{
    if (Set)
    {
        AsmVmxVmcall(VMCALL_SET_CLEAR_GUEST_IA32_LBR_CTL, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
    else
    {
        AsmVmxVmcall(VMCALL_UNSET_CLEAR_GUEST_IA32_LBR_CTL, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
}

CrossVmcallSetDebugctlVmcallOnTargetCore()

VOID CrossVmcallSetDebugctlVmcallOnTargetCore

(

UINT64

Value

)

Set the guest state of IA32_DEBUGCTL on the target core from VMCS using VMCALL.

Parameters

Value

Returns

VOID

{
    AsmVmxVmcall(VMCALL_SET_VMCS_DEBUGCTL, Value, NULL64_ZERO, NULL64_ZERO);
}

CrossVmcallSetGuestIa32LbrCtlVmcallOnTargetCore()

VOID CrossVmcallSetGuestIa32LbrCtlVmcallOnTargetCore

(

UINT64

Value

)

Set the guest state of IA32_LBR_CTL on the target core from VMCS using VMCALL.

Parameters

Value

Returns

VOID

{
    AsmVmxVmcall(VMCALL_SET_GUEST_IA32_LBR_CTL, Value, NULL64_ZERO, NULL64_ZERO);
}

CrossVmcallSetLbrSelectVmcallOnTargetCore()

VOID CrossVmcallSetLbrSelectVmcallOnTargetCore

(

UINT64

FilterOptions

)

Set the guest state of MSR_LEGACY_LBR_SELECT on the target core from VMCS using VMCALL.

Parameters

FilterOptions

Returns

VOID

{
    AsmVmxVmcall(VMCALL_SET_MSR_LBR_SELECT, FilterOptions, NULL64_ZERO, NULL64_ZERO);
}

CrossVmcallSetLoadDebugControlsVmcallOnTargetCore()

VOID CrossVmcallSetLoadDebugControlsVmcallOnTargetCore

(

BOOLEAN

Set

)

Set LOAD DEBUG CONTROLS on Vm-entry controls on the target core from VMCS using VMCALL.

Parameters

Set	Set or unset

Returns

VOID

{
    if (Set)
    {
        AsmVmxVmcall(VMCALL_SET_VM_ENTRY_LOAD_DEBUG_CONTROLS, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
    else
    {
        AsmVmxVmcall(VMCALL_UNSET_VM_ENTRY_LOAD_DEBUG_CONTROLS, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
}

CrossVmcallSetLoadGuestIa32LbrCtlVmcallOnTargetCore()

VOID CrossVmcallSetLoadGuestIa32LbrCtlVmcallOnTargetCore

(

BOOLEAN

Set

)

Set CLEAR GUEST IA32_LBR_CTL on Vm-entry controls on the target core from VMCS using VMCALL.

Parameters

Set	Set or unset

Returns

VOID

{
    if (Set)
    {
        AsmVmxVmcall(VMCALL_SET_VM_ENTRY_LOAD_GUEST_IA32_LBR_CTL, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
    else
    {
        AsmVmxVmcall(VMCALL_UNSET_VM_ENTRY_LOAD_GUEST_IA32_LBR_CTL, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
}

CrossVmcallSetSaveDebugControlsVmcallOnTargetCore()

VOID CrossVmcallSetSaveDebugControlsVmcallOnTargetCore

(

BOOLEAN

Set

)

Set SAVE DEBUG CONTROLS on Vm-exit controls on the target core from VMCS using VMCALL.

Parameters

Set	Set or unset

Returns

VOID

{
    if (Set)
    {
        AsmVmxVmcall(VMCALL_SET_VM_EXIT_SAVE_DEBUG_CONTROLS, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
    else
    {
        AsmVmxVmcall(VMCALL_UNSET_VM_EXIT_SAVE_DEBUG_CONTROLS, NULL64_ZERO, NULL64_ZERO, NULL64_ZERO);
    }
}