Hi all, I am trying to run an application compiled using gcc generated SVE code (march=armv8-a+sve) using a full system simulation. This is the command line I am using to run the simulation:
build/ARM/gem5.opt -d /path/to/output/ configs/example/arm/fs_bigLITTLE.py --cpu-type atomic --kernel /path/to/kernel/vmlinux.arm64 --disk /path/to/disk/linaro-minimal-aarch64.img --big-cpus 2 --little-cpus 0 --param 'system.sve_vl = 1' --bootscript /path/to/script/Script.rcS The simulation starts up just fine but when I try to run the application I get: [ 2355.819013] Bad mode in Synchronous Abort handler detected, code 0x66000000 -- UNRECOGNIZED EC [ 2355.819068] CPU: 0 PID: 997 Comm: atax_sve_omp Not tainted 4.4.0+ #1 [ 2355.819109] Hardware name: V2P-CA15 (DT) [ 2355.819136] task: ffffffc077d68000 ti: ffffffc0785f0000 task.ti: ffffffc0785f0000 [ 2355.819183] PC is at 0x4030f4 [ 2355.819204] LR is at 0x4030c4 [ 2355.819225] pc : [<00000000004030f4>] lr : [<00000000004030c4>] pstate: 80000000 [ 2355.819271] sp : 0000007ffffffa60 [ 2355.819294] x29: 0000007ffffffa60 x28: 0000000000000000 [ 2355.819333] x27: 00000fa000000fa0 x26: 0000007ffffffce8 [ 2355.819371] x25: 0000000000000001 x24: 0000007ffffffb30 [ 2355.819410] x23: 0000000000000002 x22: 0000007fb05ec040 [ 2355.819448] x21: 0000000000000000 x20: 0000000000000fa0 [ 2355.819486] x19: 0000000000000fa0 x18: 0000000000000000 [ 2355.819525] x17: 0000000000433c00 x16: 00000000004b4018 [ 2355.819563] x15: 00000000004bc7c8 x14: 0000000000000027 [ 2355.819601] x13: 00000000004b5b10 x12: 0000007fb05eb010 [ 2355.819640] x11: 00000000003d0f00 x10: 0000000000418490 [ 2355.819678] x9 : 0000007fb05ea910 x8 : 0000000000000062 [ 2355.819716] x7 : 00000000004bc448 x6 : 00000000004bc448 [ 2355.819755] x5 : 0000007fb05eb0e0 x4 : 0000007fb05eb710 [ 2355.819793] x3 : 00000000000007d0 x2 : 0000000000000000 [ 2355.819831] x1 : 00000000004bc700 x0 : 00000000004bdae0 [ 2355.819869] Illegal instruction Running the same application compiled without SVE code works with no problems. I believe the SVE code in the application is also working, as I was able to run it using system call emulation (although a single-threaded version) with the SVE instructions. I have compiled the kernel using the guide in this tutorial https://www.rico.cat/files/ICS18-gem5-sve-tutorial.pdf and I am using the latest gem5 revision in the master branch (4ae8d1c0ed18f351b52f421553b28fe109f87665). Has anybody gone through this problem or have any suggestions? Regards, Jeckson Dellagostin Souza PhD Candidate Instituto de Informática Universidade Federal do Rio Grande do Sul
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