| ## Overview |
|
|
| The document covers procedures for installing the latest GPU and NPU drivers, and OpenCL and Hexagon SDKs. |
|
|
|
|
| In order to use Hexagon NPU on Snapdragon Windows devices the underlying HTP Ops libraries (e.g libggml-htp-v73.so) |
| must be included in the .cat file digitally signed with a trusted certificate. |
|
|
| This document covers details on how to generate personal certificate files (.pfx) and how to configure the system |
| to allow for test signatures (aka test-signing). |
|
|
| ## Install the latest Adreno OpenCL SDK |
|
|
| Either use the trimmed down version (optimized for CI) from |
|
|
| https://github.com/snapdragon-toolchain/opencl-sdk/releases/download/v2.3.2/adreno-opencl-sdk-v2.3.2-arm64-wos.tar.xz |
| |
| Or download the complete official version from |
|
|
| https://softwarecenter.qualcomm.com/catalog/item/Adreno_OpenCL_SDK?version=2.3.2 |
| |
| Unzip/untar the archive into |
| ``` |
| c:\Qualcomm\OpenCL_SDK\2.3.2 |
| ``` |
|
|
| ## Install the latest Hexagon SDK Community Edition |
|
|
| Either use the trimmed down version (optimized for CI) from |
|
|
| https://github.com/snapdragon-toolchain/hexagon-sdk/releases/download/v6.4.0.2/hexagon-sdk-v6.4.0.2-arm64-wos.tar.xz |
| |
| Or download the complete official version from |
|
|
| https://softwarecenter.qualcomm.com/catalog/item/Hexagon_SDK?version=6.4.0.2 |
| |
| Unzip/untar the archive into |
| ``` |
| c:\Qualcomm\Hexagon_SDK\6.4.0.2 |
| ``` |
|
|
| ## Install the latest Adreno GPU driver |
|
|
| Download the driver from |
|
|
| https://softwarecenter.qualcomm.com/catalog/item/Windows_Graphics_Driver |
| |
| After the automated installation and reboot please make sure that the GPU device shows up in the `Device Manager` (under 'Display Adapters`) |
|
|
| ## Install the latest Qualcomm NPU driver |
|
|
| Download the driver from |
|
|
| https://softwarecenter.qualcomm.com/catalog/item/Qualcomm_HND |
| |
| After the automated installation and reboot please make sure that the Hexagon NPU device shows up in the `Device Manager` (under `Neural Processors`). |
|
|
| If the device is not available you can try installing all components (`qcnspmcdm8380`, `qcnspmcdm8380_ext`) manually. |
| The components are extracted into |
| ``` |
| c:\QCDrivers\qcnspmcdm... |
| ``` |
|
|
| ## Enable NPU driver test signatures |
|
|
| Please note that the following steps are required only for the Hexagon NPU. |
| Adreno GPU backend does not require test signatures. |
|
|
| ### Enable testsigning |
|
|
| Use `bcdedit` to enable test-signing |
| ``` |
| > bcdedit /set TESTSIGNING ON |
| ``` |
| (Secure Boot may need to be disabled for this to work) |
|
|
| Make sure test-signing is enabled after reboot |
| ``` |
| > bcdedit /enum |
| ... |
| testsigning Yes |
| ... |
| ``` |
| For additional details see Microsoft guide at |
|
|
| https://learn.microsoft.com/en-us/windows-hardware/drivers/install/the-testsigning-boot-configuration-option |
|
|
| ### Create personal certificate |
|
|
| The tools required for this procedure are available as part of Windows SDK and Windows Driver Kit which should be |
| installed as part of the MS Visual Studio. |
| They are typically located at |
| ``` |
| c:\Program Files (x86)\Windows Kits\10\bin\10.0.26100.0 |
| ``` |
| (replace 10.0.26100.0 with correct version). |
|
|
| To create personal self-signed certificate run the following commands (either from cmd or power-shell): |
| ``` |
| > cd c:\Users\MyUser |
| > mkdir Certs |
| > cd Certs |
| > makecert -r -pe -ss PrivateCertStore -n CN=GGML.HTP.v1 -eku 1.3.6.1.5.5.7.3.3 -sv ggml-htp-v1.pvk ggml-htp-v1.cer |
| > pvk2pfx.exe -pvk ggml-htp-v1.pvk -spc ggml-htp-v1.cer -pfx ggml-htp-v1.pfx |
| ``` |
| (replace `MyUser` with your username). |
|
|
| Add this certificate to `Trusted Root Certification Authorities` and `Trusted Publishers` stores. |
| This can be done using `certlm` Certificate Manager tool. |
| Right click on the certificate store, select `All Tasks -> Import` and follow the prompts to import the certificate from the |
| PFX file you created above. |
|
|
| For additional details see Microsoft guide at |
|
|
| https://learn.microsoft.com/en-us/windows-hardware/drivers/install/introduction-to-test-signing |
| |
| Make sure to save the PFX file, you will need it for the build procedures. |
| Please note that the same certificate can be used for signing any number of builds. |
|
|
| ## Build Hexagon backend with signed HTP ops libraries |
|
|
| The overall Hexagon backend build procedure for Windows on Snapdragon is the same as for other platforms. |
| However, additional settings are required for generating and signing HTP Ops libraries. |
| ``` |
| > $env:OPENCL_SDK_ROOT="C:\Qualcomm\OpenCL_SDK\2.3.2" |
| > $env:HEXAGON_SDK_ROOT="C:\Qualcomm\Hexagon_SDK\6.4.0.2" |
| > $env:HEXAGON_TOOLS_ROOT="C:\Qualcomm\Hexagon_SDK\6.4.0.2\tools\HEXAGON_Tools\19.0.04" |
| > $env:HEXAGON_HTP_CERT="c:\Users\MyUsers\Certs\ggml-htp-v1.pfx" |
| > $env:WINDOWS_SDK_BIN="C:\Program Files (x86)\Windows Kits\10\bin\10.0.26100.0\arm64" |
| |
| > cmake --preset arm64-windows-snapdragon-release -B build-wos |
| ... |
| > cmake --install build-wos --prefix pkg-snapdragon |
| ``` |
|
|
| Once the build is complete HTP ops libraries will be installed like this |
| ``` |
| > dir pkg-snapdragon/lib |
| ... |
| -a---- 1/22/2026 6:01 PM 187656 libggml-htp-v73.so |
| -a---- 1/22/2026 6:01 PM 191752 libggml-htp-v75.so |
| -a---- 1/22/2026 6:01 PM 187656 libggml-htp-v79.so |
| -a---- 1/22/2026 6:01 PM 187656 libggml-htp-v81.so |
| -a---- 1/22/2026 6:01 PM 4139 libggml-htp.cat |
| ``` |
|
|
| The .cat file, the signature and proper certificate installation can be verified with |
|
|
| ``` |
| > signtool.exe verify /v /pa .\pkg-snapdragon\lib\libggml-htp.cat |
| Verifying: .\pkg-snapdragon\lib\libggml-htp.cat |
| |
| Signature Index: 0 (Primary Signature) |
| Hash of file (sha256): 9820C664DA59D5EAE31DBB664127FCDAEF59CDC31502496BC567544EC2F401CF |
| |
| Signing Certificate Chain: |
| Issued to: GGML.HTP.v1 |
| ... |
| Successfully verified: .\pkg-snapdragon\lib\libggml-htp.cat |
| ... |
| ``` |
|
|
