Hi all, First of all, thank you Giacomo for the support, I finally got KVM + arm + multiple cores working! Kernel 4.14 worked, btw.
Just a list of things I had to do, in case someone else ends up in the same situation I did. For the MSR (immediate) undefined instruction, the solution goes as Giacomo pointed out: re-build the arm kernel and unselect the UAO from it. After cloning the gem5 arm kernel repo and `make gem5_defconfig` one can make menuconfig -> kernel features -> ARM v8.2 architectural features -> unselect the UAO option. build the kernel and use it. After I still got the following problem when restoring from a kvm taken checkpoint: [ 5.681321] INFO: rcu_preempt self-detected stall on CPU [ 5.681326] 0-...: (1 ticks this GP) idle=646/140000000000001/0 softirq=330/330 fqs=0 [ 5.681330] (t=549009 jiffies g=-144 c=-145 q=14) [ 5.681336] rcu_preempt kthread starved for 549009 jiffies! g18446744073709551472 c18446744073709551471 f0x0 RCU_GP_WAIT_FQS(3) ->state=0x402 ->cpu=0 [ 5.681342] rcu_preempt I 0 8 2 0x00000020 ... But this problem vanished when I used the simulated gic (my host cpu is ARMv8, and does not have gic2 supported by gem5). For that, one can combine the `--cpu-type kvm` flag with the `--kvm-userspace-gic` (fs_bigLITTLE.py, gem5 version 21.1.0.0) when creating checkpoints. Regards, Pedro. _______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s
