Tom Stellard
e2ed9cf79a
Marking heap memory as executable using mprotect() is not allowed by SELinux. mprotect() calls that try to do this will fail on systems with SELinux enabled. This is also a security risk, so it should be fixed even on systems that allow this. Any memory we want to mark as executable must be allocated using mmap(). See https://www.akkadia.org/drepper/selinux-mem.html The two places where we try to mark heap memory as executable both use posix_memalign() to allocate the heap memory. In both cases, the alignment value passed into this function is always equal to PAGE_SIZE, which means that they are safe to replace with mmap(), which guarantees alignment to PAGE_SIZE. In this case PAGE_SIZE has been set to sysconf(_SC_PAGESIZE); v2: - Use MAP_PRIVATE instead of MAP_SHARED. This matches the behavior of memory allocated by posix_memalign() - Ignore alignment hints instead of returning error when we can't accommodate them. - Drop alignment parameter of allocate_exec_aligned_memory() since the only alignment supported is sysconf(_SC_PAGESIZE). - Remove extra parameter from fmm_release(). - Add error path to fmm_allocate_host_cpu() for when mmap fails. v3: - Avoid use after free. Change-Id: I7d51279790d9700bc3fa761c44bfde1c1936019b Signed-off-by: Felix Kuehling <Felix.Kuehling@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.
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 runtime from the the ROCT-Thunk-Interface directory, execute:
mkdir -p build
cd build
cmake -DCMAKE_MODULE_PATH=../cmake_modules ..
make
If the hsakmt-roct and hsakmt-roct-dev packages are desired:
mkdir -p build
cd build
cmake ..
make package
make package-dev
Disclaimer
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