Merge pull request #30 from kepatil/add-new-reg-keys
Add new registry keys to cl_khr_icd extension.
diff --git a/extensions/khr/cl_khr_icd.txt b/extensions/khr/cl_khr_icd.txt
index a9a428c..5ee8cc8 100644
--- a/extensions/khr/cl_khr_icd.txt
+++ b/extensions/khr/cl_khr_icd.txt
@@ -4,6 +4,7 @@
Contributors
+ Ben Ashbaugh
Christopher Cameron
Benedict Gaster
Michael Houston
@@ -19,7 +20,7 @@
Version
- Version 7, March 2, 2010
+ Version 8, August 8, 2017
Number
@@ -92,18 +93,56 @@
ICD Loader Vendor Enumeration on Windows
- To enumerate Vendor ICDs on Windows, the ICD Loader scans
- the values in the registry key
- HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenCL\Vendors
- For each value in this key which has DWORD data set to 0, the ICD
- Loader opens the dynamic link library specified by the name of
- the value using LoadLibraryA.
-
- For example, if the registry contains the following value
- [HKEY_LOCAL_MACHINE\SOFTWARE\Khronos\OpenCL\Vendors]
+ To enumerate Vendor ICDs on Windows, the ICD Loader will first
+ scan for REG_SZ string values in the "Display Adapter" and
+ "Software Components" HKR registry keys. The exact registry
+ keys to scan should be obtained via PnP Configuration Manager
+ APIs, but will look like:
+
+ For 64-bit ICDs:
+
+ HKLM\SYSTEM\CurrentControlSet\Control\Class\
+ {Display Adapter GUID}\{Instance ID}\OpenCLDriverName, or
+
+ HKLM\SYSTEM\CurrentControlSet\Control\Class\
+ {Software Component GUID}\{Instance ID}\OpenCLDriverName
+
+ For 32-bit ICDs:
+
+ HKLM\SYSTEM\CurrentControlSet\Control\Class\
+ {Display Adapter GUID}\{Instance ID}\OpenCLDriverNameWoW, or
+
+ HKLM\SYSTEM\CurrentControlSet\Control\Class\
+ {Software Component GUID}\{Instance ID}\OpenCLDriverNameWoW
+
+ These registry values contain the path to the Vendor ICD library.
+ For example, if the registry contains the value:
+
+ [HKLM\SYSTEM\CurrentControlSet\Control\Class\{GUID}\{Instance}]
+ "OpenCLDriverName"="c:\\vendor a\\vndra_ocl.dll"
+
+ Then the ICD loader will open the Vendor ICD library:
+
+ "c:\vendor a\vndra_ocl.dll"
+
+ The ICD Loader will also scan for REG_DWORD values in the registry
+ key:
+
+ HKLM\SOFTWARE\Khronos\OpenCL\Vendors
+
+ For each registry value in this key which has data set to 0, the
+ ICD Loader will open the Vendor ICD library specified by the name
+ of the registry value.
+
+ For example, if the registry contains the value:
+
+ [HKLM\SOFTWARE\Khronos\OpenCL\Vendors]
"c:\\vendor a\\vndra_ocl.dll"=dword:00000000
- then the ICD will open the library "c:\vendor a\vndra_ocl.dll"
-
+
+ Then the ICD will open the Vendor ICD library:
+
+ "c:\vendor a\vndra_ocl.dll"
+
ICD Loader Vendor Enumeration on Linux
To enumerate vendor ICDs on Linux, the ICD Loader scans
@@ -263,9 +302,8 @@
Sample Code
- The official source for the ICD. This is currently available
- only to Khronos members from our internal Subversion
- repository under /repos/OpenCL/trunk/icd/
+ The official source for the ICD loader is available on github, here:
+ https://github.com/KhronosGroup/OpenCL-ICD-Loader
An abbreviated version of the _cl_icd_dispatch structure is
as follows.
@@ -311,6 +349,10 @@
Revision History
+ Version 8, 2017/08/08 (Ben Ashbaugh) - updated to include HKR
+ as a scanned registry key for Windows, added github link for ICD
+ loader source code.
+
Version 7, 2010/03/02 (Jon Leech) - fix typos for
clGetExtensionFunctionAddress (public bug 258), reflow a paragraph
with very long lines.
