f46c9ddbfb
Although the binary ROM blob and MMIO trace will be placed in gem5-resources later as 'golden' versions, the scripts are added to provide instructions for power users of Full System amdgpu that may want to recreate the files themselves or use a GPU other than the Vega10 GPU currently modeled. Change-Id: Ica7ef3b9820b30be32a148ce6cf1d2f81dc2adf9 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/46162 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com> Reviewed-by: Jason Lowe-Power <power.jg@gmail.com> Maintainer: Matt Sinclair <mattdsinclair@gmail.com>
39 lines
1.7 KiB
Markdown
39 lines
1.7 KiB
Markdown
The utility scripts provided in this directly can be used to recreate the
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files needed to run Full System amdgpu. Golden versions of these files are
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provided in the gem5-resources repository.
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These scripts are intended to be run on a Linux system with a discrete AMD
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GPU card running the same kernel version as the disk image which will be used
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for Full System simulations. To ensure the kernel versions match, it is
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recommended that the user uses the `dd` utility to make a copy of the disk
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image to a secondary physical disk and then boot from that disk image.
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# MMIO Trace collection
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The script `collect_mmio_trace.sh` collects an MMIO trace. For this to work,
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MMIO tracing must be enabled in the kernel. Using the disk image approach
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above and/or using recent kernel versions based on Ubuntu, this is enabled
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by default.
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Before collecting the trace, the amdgpu module must be blacklisted such that
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we can enable tracing before the modprobe occurs and disabled once modprobe
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is complete.
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This can be done using either:
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`echo 'blacklist amdgpu' >> /etc/modprobe.d/blacklist.conf`
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or
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add `modprobe.blacklist=amdgpu` to kernel boot command (e.g., in grub)
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And then reboot.
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The script will take care of the proper options and run the mmiotrace
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commands. The output trace will likely contain unrelated from other MMIOs
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and therefore will be around 500MB in size. You will want to reboot again
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as mmiotrace disables SMP.
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# GPU ROM Dump
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The script `dump_gpu_rom.sh` dumps the GPU ROM. The GPU ROM on x86 resides
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in the memory range 0xC0000 - 0xDFFFF. The script simply uses the `dd`
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command to copy this range from /dev/mem. The amdgpu driver must be loaded
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in order for the ROM to be written to this region, so run `modprobe` first.
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