This driver supports Windows EAL memory management by translating current process virtual addresses to physical addresses (IOVA). Standalone virt2phys allows using DPDK without PMD and provides a reference implementation.
Suggested-by: Ranjit Menon <ranjit.me...@intel.com> Signed-off-by: Dmitry Kozlyuk <dmitry.kozl...@gmail.com> --- windows/README.rst | 103 +++++++++ windows/virt2phys/virt2phys.c | 129 +++++++++++ windows/virt2phys/virt2phys.h | 34 +++ windows/virt2phys/virt2phys.inf | 64 ++++++ windows/virt2phys/virt2phys.sln | 27 +++ windows/virt2phys/virt2phys.vcxproj | 228 ++++++++++++++++++++ windows/virt2phys/virt2phys.vcxproj.filters | 36 ++++ 7 files changed, 621 insertions(+) create mode 100644 windows/README.rst create mode 100644 windows/virt2phys/virt2phys.c create mode 100644 windows/virt2phys/virt2phys.h create mode 100644 windows/virt2phys/virt2phys.inf create mode 100644 windows/virt2phys/virt2phys.sln create mode 100644 windows/virt2phys/virt2phys.vcxproj create mode 100644 windows/virt2phys/virt2phys.vcxproj.filters diff --git a/windows/README.rst b/windows/README.rst new file mode 100644 index 0000000..45a1d80 --- /dev/null +++ b/windows/README.rst @@ -0,0 +1,103 @@ +Developing Windows Drivers +========================== + +Prerequisites +------------- + +Building Windows Drivers is only possible on Windows. + +1. Visual Studio 2019 Community or Professional Edition +2. Windows Driver Kit (WDK) for Windows 10, version 1903 + +Follow the official instructions to obtain all of the above: +https://docs.microsoft.com/en-us/windows-hardware/drivers/download-the-wdk + + +Build the Drivers +----------------- + +Build from Visual Studio +~~~~~~~~~~~~~~~~~~~~~~~~ + +Open a solution (``*.sln``) with Visual Studio and build it (Ctrl+Shift+B). + + +Build from Command-Line +~~~~~~~~~~~~~~~~~~~~~~~ + +Run *Developer Command Prompt for VS 2019* from the Start menu. + +Navigate to the solution directory (with ``*.sln``), then run: + +.. code-block:: console + + msbuild + +To build a particular combination of configuration and platform: + +.. code-block:: console + + msbuild -p:Configuration=Debug;Platform=x64 + + +Install the Drivers +------------------- + +Disable Driver Signature Enforcement +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +By default Windows prohibits installing and loading drivers without `digital +signature`_ obtained from Microsoft. For development signature enforcement may +be disabled as follows. + +In Elevated Command Prompt (from this point, sufficient privileges are +assumed): + +.. code-block:: console + + bcdedit -set loadoptions DISABLE_INTEGRITY_CHECKS + bcdedit -set TESTSIGNING ON + shutdown -r -t 0 + +Upon reboot, an overlay message should appear on the desktop informing +that Windows is in test mode, which means it allows loading unsigned drivers. + +.. _digital signature: https://docs.microsoft.com/en-us/windows-hardware/drivers/install/driver-signing + +Install, List, and Remove Drivers +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +Driver package is by default located in a subdirectory of its source tree, +e.g. ``x64\Debug\virt2phys\virt2phys`` (note two levels of ``virt2phys``). + +To install the driver and bind associated devices to it: + +.. code-block:: console + + pnputil /add-driver x64\Debug\virt2phys\virt2phys\virt2phys.inf /install + +A graphical confirmation to load an unsigned driver will still appear. + +On Windows Server additional steps are required if the driver uses a custom +setup class: + +1. From "Device Manager", "Action" menu, select "Add legacy hardware". +2. It will launch the "Add Hardware Wizard". Click "Next". +3. Select second option "Install the hardware that I manually select + from a list (Advanced)". +4. On the next screen, locate the driver device class. +5. Select it, and click "Next". +6. The previously installed drivers will now be installed for + the appropriate devices (software devices will be created). + +To list installed drivers: + +.. code-block:: console + + pnputil /enum-drivers + +To remove the driver package and to uninstall its devices: + +.. code-block:: console + + pnputil /delete-driver oem2.inf /uninstall diff --git a/windows/virt2phys/virt2phys.c b/windows/virt2phys/virt2phys.c new file mode 100644 index 0000000..e157e9c --- /dev/null +++ b/windows/virt2phys/virt2phys.c @@ -0,0 +1,129 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2020 Dmitry Kozlyuk + */ + +#include <ntddk.h> +#include <wdf.h> +#include <wdmsec.h> +#include <initguid.h> + +#include "virt2phys.h" + +DRIVER_INITIALIZE DriverEntry; +EVT_WDF_DRIVER_DEVICE_ADD virt2phys_driver_EvtDeviceAdd; +EVT_WDF_IO_IN_CALLER_CONTEXT virt2phys_device_EvtIoInCallerContext; + +NTSTATUS +DriverEntry( + IN PDRIVER_OBJECT driver_object, IN PUNICODE_STRING registry_path) +{ + WDF_DRIVER_CONFIG config; + WDF_OBJECT_ATTRIBUTES attributes; + NTSTATUS status; + + PAGED_CODE(); + + WDF_DRIVER_CONFIG_INIT(&config, virt2phys_driver_EvtDeviceAdd); + WDF_OBJECT_ATTRIBUTES_INIT(&attributes); + status = WdfDriverCreate( + driver_object, registry_path, + &attributes, &config, WDF_NO_HANDLE); + if (!NT_SUCCESS(status)) { + KdPrint(("WdfDriverCreate() failed, status=%08x\n", status)); + } + + return status; +} + +_Use_decl_annotations_ +NTSTATUS +virt2phys_driver_EvtDeviceAdd( + WDFDRIVER driver, PWDFDEVICE_INIT init) +{ + WDF_OBJECT_ATTRIBUTES attributes; + WDFDEVICE device; + NTSTATUS status; + + UNREFERENCED_PARAMETER(driver); + + PAGED_CODE(); + + WdfDeviceInitSetIoType( + init, WdfDeviceIoNeither); + WdfDeviceInitSetIoInCallerContextCallback( + init, virt2phys_device_EvtIoInCallerContext); + + WDF_OBJECT_ATTRIBUTES_INIT(&attributes); + + status = WdfDeviceCreate(&init, &attributes, &device); + if (!NT_SUCCESS(status)) { + KdPrint(("WdfDeviceCreate() failed, status=%08x\n", status)); + return status; + } + + status = WdfDeviceCreateDeviceInterface( + device, &GUID_DEVINTERFACE_VIRT2PHYS, NULL); + if (!NT_SUCCESS(status)) { + KdPrint(("WdfDeviceCreateDeviceInterface() failed, " + "status=%08x\n", status)); + return status; + } + + return STATUS_SUCCESS; +} + +_Use_decl_annotations_ +VOID +virt2phys_device_EvtIoInCallerContext( + IN WDFDEVICE device, IN WDFREQUEST request) +{ + WDF_REQUEST_PARAMETERS params; + ULONG code; + PVOID *virt; + PHYSICAL_ADDRESS *phys; + size_t size; + NTSTATUS status; + + UNREFERENCED_PARAMETER(device); + + PAGED_CODE(); + + WDF_REQUEST_PARAMETERS_INIT(¶ms); + WdfRequestGetParameters(request, ¶ms); + + if (params.Type != WdfRequestTypeDeviceControl) { + KdPrint(("bogus request type=%u\n", params.Type)); + WdfRequestComplete(request, STATUS_NOT_SUPPORTED); + return; + } + + code = params.Parameters.DeviceIoControl.IoControlCode; + if (code != IOCTL_VIRT2PHYS_TRANSLATE) { + KdPrint(("bogus IO control code=%lu\n", code)); + WdfRequestComplete(request, STATUS_NOT_SUPPORTED); + return; + } + + status = WdfRequestRetrieveInputBuffer( + request, sizeof(*virt), (PVOID *)&virt, &size); + if (!NT_SUCCESS(status)) { + KdPrint(("WdfRequestRetrieveInputBuffer() failed, " + "status=%08x\n", status)); + WdfRequestComplete(request, status); + return; + } + + status = WdfRequestRetrieveOutputBuffer( + request, sizeof(*phys), (PVOID *)&phys, &size); + if (!NT_SUCCESS(status)) { + KdPrint(("WdfRequestRetrieveOutputBuffer() failed, " + "status=%08x\n", status)); + WdfRequestComplete(request, status); + return; + } + + *phys = MmGetPhysicalAddress(*virt); + + WdfRequestCompleteWithInformation( + request, STATUS_SUCCESS, sizeof(*phys)); +} diff --git a/windows/virt2phys/virt2phys.h b/windows/virt2phys/virt2phys.h new file mode 100644 index 0000000..4bb2b4a --- /dev/null +++ b/windows/virt2phys/virt2phys.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright (c) 2020 Dmitry Kozlyuk + */ + +/** + * @file virt2phys driver interface + */ + +/** + * Driver device interface GUID {539c2135-793a-4926-afec-d3a1b61bbc8a}. + */ +DEFINE_GUID(GUID_DEVINTERFACE_VIRT2PHYS, + 0x539c2135, 0x793a, 0x4926, + 0xaf, 0xec, 0xd3, 0xa1, 0xb6, 0x1b, 0xbc, 0x8a); + +/** + * Driver device type for IO control codes. + */ +#define VIRT2PHYS_DEVTYPE 0x8000 + +/** + * Translate a valid non-paged virtual address to a physical address. + * + * Note: A physical address zero (0) is reported if input address + * is paged out or not mapped. However, if input is a valid mapping + * of I/O port 0x0000, output is also zero. There is no way + * to distinguish between these cases by return value only. + * + * Input: a non-paged virtual address (PVOID). + * + * Output: the corresponding physical address (LARGE_INTEGER). + */ +#define IOCTL_VIRT2PHYS_TRANSLATE CTL_CODE( \ + VIRT2PHYS_DEVTYPE, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS) diff --git a/windows/virt2phys/virt2phys.inf b/windows/virt2phys/virt2phys.inf new file mode 100644 index 0000000..e35765e --- /dev/null +++ b/windows/virt2phys/virt2phys.inf @@ -0,0 +1,64 @@ +; SPDX-License-Identifier: BSD-3-Clause +; Copyright (c) 2020 Dmitry Kozlyuk + +[Version] +Signature = "$WINDOWS NT$" +Class = %ClassName% +ClassGuid = {78A1C341-4539-11d3-B88D-00C04FAD5171} +Provider = %ManufacturerName% +CatalogFile = virt2phys.cat +DriverVer = + +[DestinationDirs] +DefaultDestDir = 12 + +; ================= Class section ===================== + +[ClassInstall32] +Addreg = virt2phys_ClassReg + +[virt2phys_ClassReg] +HKR,,,0,%ClassName% +HKR,,Icon,,-5 + +[SourceDisksNames] +1 = %DiskName%,,,"" + +[SourceDisksFiles] +virt2phys.sys = 1,, + +;***************************************** +; Install Section +;***************************************** + +[Manufacturer] +%ManufacturerName%=Standard,NT$ARCH$ + +[Standard.NT$ARCH$] +%virt2phys.DeviceDesc%=virt2phys_Device, Root\virt2phys + +[virt2phys_Device.NT] +CopyFiles = Drivers_Dir + +[Drivers_Dir] +virt2phys.sys + +;-------------- Service installation +[virt2phys_Device.NT.Services] +AddService = virt2phys,%SPSVCINST_ASSOCSERVICE%, virt2phys_Service_Inst + +; -------------- virt2phys driver install sections +[virt2phys_Service_Inst] +DisplayName = %virt2phys.SVCDESC% +ServiceType = 1 ; SERVICE_KERNEL_DRIVER +StartType = 3 ; SERVICE_DEMAND_START +ErrorControl = 1 ; SERVICE_ERROR_NORMAL +ServiceBinary = %12%\virt2phys.sys + +[Strings] +SPSVCINST_ASSOCSERVICE = 0x00000002 +ManufacturerName = "Dmitry Kozlyuk" +ClassName = "Kernel bypass" +DiskName = "virt2phys Installation Disk" +virt2phys.DeviceDesc = "Virtual to physical address translator" +virt2phys.SVCDESC = "virt2phys Service" diff --git a/windows/virt2phys/virt2phys.sln b/windows/virt2phys/virt2phys.sln new file mode 100644 index 0000000..0f5ecdc --- /dev/null +++ b/windows/virt2phys/virt2phys.sln @@ -0,0 +1,27 @@ + +Microsoft Visual Studio Solution File, Format Version 12.00 +# Visual Studio Version 16 +VisualStudioVersion = 16.0.29613.14 +MinimumVisualStudioVersion = 10.0.40219.1 +Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "virt2phys", "virt2phys.vcxproj", "{0EEF826B-9391-43A8-A722-BDD6F6115137}" +EndProject +Global + GlobalSection(SolutionConfigurationPlatforms) = preSolution + Debug|x64 = Debug|x64 + Release|x64 = Release|x64 + EndGlobalSection + GlobalSection(ProjectConfigurationPlatforms) = postSolution + {0EEF826B-9391-43A8-A722-BDD6F6115137}.Debug|x64.ActiveCfg = Debug|x64 + {0EEF826B-9391-43A8-A722-BDD6F6115137}.Debug|x64.Build.0 = Debug|x64 + {0EEF826B-9391-43A8-A722-BDD6F6115137}.Debug|x64.Deploy.0 = Debug|x64 + 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