Philip Yang
a11cb2a633
child process clone vm objects from svm->apertures if parent process doesn't free memory before fork. fmm_clear_all_mem suppose to clear the apertures in forked child process but this only works if gpu_vm is not NULL. parent process call hsaKmtCloseKFD reset gpu_vm to NULL and then fork, then child process will not clear svm->apertures. As a result, the child process will allocate vm object with same address and add to aperture, there are duplicate vm objects with same address in aperture. Then mapping to GPU will find the wrong vm object and create incorrect GPU mapping cause rocrtst IPC test VM fault. The issue happened with HSA_USERPTR_FOR_PAGED_MEM=1. The fix is to clear vm objects in all apertures in clear_after_fork. Change-Id: I92e42a967075a634a3f475b915c8242d82077ecb Signed-off-by: Philip Yang <Philip.Yang@amd.com>
ROCt Library
This repository includes the user-mode API interfaces used to interact with the ROCk driver. Currently supported agents include only the AMD/ATI Fiji family of discrete GPUs.
Starting at 1.7 release, ROCt uses drm render device. This requires the user to belong to video group. Add the user account to video group with "sudo usermod -a -G video username" command if the user if not part of video group yet.
ROCk Driver
The ROCt library is not a standalone product and requires that you have the correct ROCk driver set installed. We recommend reading the full compatibility and installation details which are available in the ROCk github:
https://github.com/RadeonOpenCompute/ROCK-Radeon-Open-Compute-Kernel-Driver
Building the Thunk
A simple cmake-based system is available for building thunk. To build the thunk from the the ROCT-Thunk-Interface directory, execute:
mkdir -p build
cd build
cmake ..
make
If the hsakmt-roct and hsakmt-roct-dev packages are desired:
mkdir -p build
cd build
cmake ..
make package
make package-dev
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