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In FS mode offsets for HSA queues are determined by the driver and cannot be linearly assigned as they are in SE mode. Add plumbing to pass the offset of a queue to the HSA packet processor and then to HW scheduler. A mapping to/from queue ID <-> doorbell offset are also needed to be able to unmap queues. ROCm 4.2 is fairly aggressive about context switching queues, which results in queues being constantly mapped and unmapped. Another result of remapping queues is the read index is not preserved in gem5. The PM4 packet processor will write the currenty read index value to the MQD before the queue is unmapped. The MQD is written back to memory on unmap and re-read on mapping to obtain the previous value. Some helper functions are added to be able to restore the read index from a non-zero value. Change-Id: I0153ff53765daccc1de23ea3f4b69fd2fa5a275f Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/53076 Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
This is the gem5 simulator. The main website can be found at http://www.gem5.org A good starting point is http://www.gem5.org/about, and for more information about building the simulator and getting started please see http://www.gem5.org/documentation and http://www.gem5.org/documentation/learning_gem5/introduction. To build gem5, you will need the following software: g++ or clang, Python (gem5 links in the Python interpreter), SCons, zlib, m4, and lastly protobuf if you want trace capture and playback support. Please see http://www.gem5.org/documentation/general_docs/building for more details concerning the minimum versions of these tools. Once you have all dependencies resolved, type 'scons build/<CONFIG>/gem5.opt' where CONFIG is one of the options in build_opts like ARM, NULL, MIPS, POWER, SPARC, X86, Garnet_standalone, etc. This will build an optimized version of the gem5 binary (gem5.opt) with the the specified configuration. See http://www.gem5.org/documentation/general_docs/building for more details and options. The main source tree includes these subdirectories: - build_opts: pre-made default configurations for gem5 - build_tools: tools used internally by gem5's build process. - configs: example simulation configuration scripts - ext: less-common external packages needed to build gem5 - include: include files for use in other programs - site_scons: modular components of the build system - src: source code of the gem5 simulator - system: source for some optional system software for simulated systems - tests: regression tests - util: useful utility programs and files To run full-system simulations, you may need compiled system firmware, kernel binaries and one or more disk images, depending on gem5's configuration and what type of workload you're trying to run. Many of those resources can be downloaded from http://resources.gem5.org, and/or from the git repository here: https://gem5.googlesource.com/public/gem5-resources/ If you have questions, please send mail to gem5-users@gem5.org Enjoy using gem5 and please share your modifications and extensions.