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CHANGELOG.md

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Level zero loader changelog

v1.8.8

  • Update Extension and Experimental Features to return ZE_RESULT_ERROR_UNSUPPORTED_FEATURE instead of ZE_RESULT_ERROR_UNINITIALIZED when not found.

v1.8.5

  • Remove RTLD_DEEPBIND from driver dlopen calls
  • Add loader code generation scripts
  • Update to spec 1.4.8 which includes fixes to zes_power_limit_ext_desc_t

v1.8.1

  • Add missing sTypes
  • Fix argument names in some exp APIs

v1.8.0

  • Add Support for L0 Spec v1.4 which includes
    • Core Fabric Topology API
    • Core Extension for memory BW
    • Core Extension for LUID query
    • Sysman ECC
    • Sysman Power Limits Extension

v1.7.15

  • Fix bug during multiple calls to zeInit with no driver present
  • Add option to support build with sccache

v1.7.9

  • Fix bug in loader handle translation API
  • Fix tracing layer functionality in newer APIs

v1.7.4

  • Addition of new Loader API to perform handle translations. See doc/loader_api.md
  • Add Ability to read optional Level Zero Registry Key Containing the Level Zero Loader libraries on windows
  • Update L0 headers to 1.3.7 Spec which includes:
    • Fix to bool type that caused compilation issues
    • Addition of new metrics enum for stall sampling
    • Changing some param names for consistency

v1.6.2

  • Removed Null Driver Tracing Support (Tracing supported using the Layer implementation)
  • Fixed ze_callbacks_t for backwards compatibility

v1.6.1

  • Updated L0 API headers to 1.3.0 which includes:
    • Get PCI Properties Extension
    • Get Image Allocation Properties Extension
    • Memory Free Extension
    • Module Linkage Inspection Extension
    • Image Copy To/From Memory Extensions
    • GDDR Memory Type support in SysMan
    • PCIe Card-level power domains in SysMan
  • Fixed Return Codes for uninitialized function pointers & tables to return ZE_RESULT_ERROR_UNINITIALIZED vs ZE_RESULT_ERROR_UNSUPPORTED_VERSION
  • Tracing Context handled during library init & destroy
  • Enable CPACK support for ARM64 Package Generation

v1.5.4

  • Fixed a bug verifying L0 Driver stability after initializing ddi tables
  • Updated Windows usage of LoadLibrary for security to only load libraries from system32
  • Fixed a bug allowing nullptr keys into handle maps

v1.5.0

  • Added Intel VPU driver to Linux known driver list
  • Fixed default symbol visibility in Linux builds
  • Added zeInit call earlier in loader init path to prevent loading drivers that don't match the ze_init_flags_t
  • Fixed build for certain SLES distros
  • Fixed bug that prevented tracers from being reenabled after being disabled.
  • Multi Driver Support: Return success if initialization of at least one driver succeeds.
  • Updated L0 API headers to 1.2.43 which includes:
    • Clarification to documentation of several APIs
    • Added missing STYPE ZE_STRUCTURE_TYPE_IMAGE_MEMORY_EXP_PROPERTIES
    • Added new experimental metrics extension to retrieve multiple metrics values

v1.4.1

  • Added support for Level Zero Specification 1.2.13
  • Fixed a bug that resulted in zeInit failing when multiple drivers are discovered and one of them fails to load.

v1.3.7

  • Fixed build warnings generated when -Wall is enabled

v1.3.6

  • New Tracing Layer APIs to support tracing Level Zero core APIs introduced after the 1.0 Specification. A change of design was needed to allow extension to new APIs without breaking backwards compatibility of original tracing APIs. The original tracing layer APIs will continue to be supported for 1.0 core APIs, but users are encouraged to switch to the new tracing layer APIs.
  • New Loader API to retrieve version information of loader and layers: zelLoaderGetVersions
  • Enabled discovery of Level Zero Compute Accelerators Drivers on windows
  • Bug Fixes:
    • Fixed loader bug that could cause corruption of handles when there are multiple drivers loaded.
    • Corrected version check in layers to future-proof compatibility checks

v1.2.3

  • Support for the new 1.1 Level Zero Specification
  • Improved library variable lifetime management by initializing variables at load time rather than as static globals.
  • Added environment variable that allows optionally specifying runtime drivers to use on Linux
  • Note: Tracing Layer support is not yet available for the APIs newly introduced in the 1.1 spec. Tracing layer support for all other APIs remains functional.

v1.1.0

Note: Level Zero Specification API did not change.

  • Update loader library to 1.1.0 to indicate addition of tracing layer implementation and associated APIs
  • Fixed bug when reading windows environment variables set by process before zeInit call. Before variables were not read correctly resulting in layers not being enabled as expected
  • Fixed bug in loader when using multiple drivers and a driver API returns an error code. Previously loader would incorrectly translate output handles from failed API calls
  • Deprecated a tracing implementation layer descriptor enum value due to incorrect name and added a replacement.