configs: Always use busy wait for GPUFS

The environment variable HSA_ENABLE_INTERRUPT controls if Interrupt or
busy wait signals are used in the ROCm runtime. Interrupts are not being
sent in gem5 causing simulations to hang indefinitely in certain
situations. To fix this, always disable interrupts to fall back to busy
wait signals. Using interrupts is an old and simple optimization to not
waste CPU cycles, but from the perspective of simulation this is not
important. Disabling interrupt-based HSA signals therefore increases the
number of applications working within gem5.

Change-Id: I1ae21d7ee01548a4d00a8972642079b90278f9a2
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/61652
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Matt Sinclair <mattdsinclair@gmail.com>

configs/example/gpufs/hip_samples.py

@@ -42,6 +42,7 @@ from ruby import Ruby
 samples_runscript = '''\
 export LD_LIBRARY_PATH=/opt/rocm/lib:$LD_LIBRARY_PATH
 export HSA_ENABLE_SDMA=0
+export HSA_ENABLE_INTERRUPT=0
 dmesg -n3
 dd if=/root/roms/vega10.rom of=/dev/mem bs=1k seek=768 count=128
 if [ ! -f /lib/modules/`uname -r`/updates/dkms/amdgpu.ko ]; then