The "Kernel-Bridge" project is a Windows kernel driver template, development framework and kernel-mode API and wrappers written on C++17.

• IO-ports (+ 'in/out/cli/sti' usermode forwarding by IOPL)
• System beeper
• MSRs, CPUID, TSC and performance counters (RDPMC)
• DMI/SMBIOS memory reading
• Physical memory (RW, mappings)
• Kernel memory management (allocations, mappings, transitions)
• Usermode memory management (allocations in processes etc.)
• Direct UM->KM and KM->UM memory transitions
• Obtaining processes/threads handles from kernel
• Reading and writing memory of another processes
• Suspending/resuming/termination processes
• Creating kernel and usermode threads
• Memory mappings between usermode and kernel
• Remote code execution (APCs delivery)
• Execution of custom usermode shellcodes
• Unsigned drivers mapping

• PCI configuration
• Processes protection using ObRegisterCallbacks
• Minifilter with usermode callbacks
• Processes and modules usermode callbacks

Driver template has full support of C++ static and global initializers and all of C++17 features (without C++ exceptions). All of API modules are easy-to-use and have no external dependiencies, so you can include them to your own C++ drivers. All of API functions are grouped into a logical categories into namespaces, so you can quickly find all functions you want.

• Support of METHOD_BUFFERED, METHOD_IN/OUT_DIRECT and METHOD_NEITHER
• Minifilter loading and filtering routines templates
• SAL-annotations and well-documented API
• Ready-to-use IOCTLs handling routine
• HLK tests passing

Download Microsoft Visual Studio Community and Windows Driver Kit.
For driver testing use VMware Player.
For load an unsigned drivers you should to enable Test-mode of Windows and disable signs checkings:

- Disable signatures checkings (allow to install unsigned drivers):
bcdedit.exe /set loadoptions DISABLE_INTEGRITY_CHECKS
bcdedit.exe /set TESTSIGNING ON

- Enable signatures checkings (deny to install unsigned drivers):
bcdedit.exe /set loadoptions ENABLE_INTEGRITY_CHECKS
bcdedit.exe /set TESTSIGNING OFF

- Enable support of kernel debugger (WinDbg and Kernel Debugger from WDK):
bcdedit.exe /debug on   -  enable support of kernel debugging
bcdedit.exe /debug off  -  disable it

For communication with usermode you should use "User-Bridge" wrappers as standalone *.cpp/*.h modules or as *.dll.
All required headers are CtlTypes.h and User-Bridge.h:

#include <Windows.h>
 
#include "CtlTypes.h"
#include "User-Bridge.h"

KbLoader::KbLoad(L"N:\\Folder\\Kernel-Bridge.sys");

// ... Do what you want ...

KbLoader::KbUnload();

/User-Bridge/API - usermode API and wrappers for all functions of KB
/Kernel-Bridge/API - standalone kernel API for using in C++ drivers
/Kernel-Bridge/Kernel-Bridge - driver template files
/SharedTypes/CtlTypes - shared types header required for UM and KM modules
/Kernel-Tests - unit-tests for UM and KM modules and common functions

#include <Windows.h>
 
#include "CtlTypes.h"
#include "User-Bridge.h"

using namespace Processes::MemoryManagement;

...

constexpr int Size = 64;
UCHAR Buffer[Size] = {};
 
BOOL Status = KbReadProcessMemory(
    ProcessId,
    0x7FFF0000, // Desired address in context of ProcessId
    &Buffer,
    Size
);