Hi,
We try to run a full-system simulation using ARMV8KvmCPU. The simulation cannot
get started due to the below failure of setting register PSTATE.
-----------------------------------------------------------------------------------------------------------------------------
… …
0: system.kvm_vm: Mapping 8 memory region(s)
0: system.kvm_vm: Mapping region: 0x0xffffaebcb000 -> 0x0 [size:
0x4000000]
0: system.kvm_vm: Mapping region: 0x0xffffbb027000 -> 0x4000000 [size:
0x40000]
0: system.kvm_vm: Mapping region: 0x0xffffacbcb000 -> 0x6000000 [size:
0x2000000]
0: system.kvm_vm: Mapping region: 0x0xffffa8bcb000 -> 0x8000000 [size:
0x4000000]
0: system.kvm_vm: Mapping region: 0x0xffffa4bcb000 -> 0xc000000 [size:
0x4000000]
0: system.kvm_vm: Mapping region: 0x0xffffa2bcb000 -> 0x18000000 [size:
0x2000000]
0: system.kvm_vm: Mapping region: 0x0xffffbc1b4000 -> 0x2e000000 [size:
0x8000]
0: system.kvm_vm: Mapping region: 0x0xffff22bcb000 -> 0x80000000 [size:
0x80000000]
build/ARM/cpu/kvm/base.cc:150: info: KVM: Coalesced MMIO disabled by config.
0: system.littleCluster.cpus: MPIDR(EL1) := 0x80000000
build/ARM/dev/arm/energy_ctrl.cc:252: warn: Existing EnergyCtrl, but no enabled
DVFSHandler found.
build/ARM/sim/simulate.cc:194: info: Entering event queue @ 0. Starting
simulation...
0: system.littleCluster.cpus: Attaching cycle counter...
0: system.littleCluster.cpus: In updateKvmState():
0: system.littleCluster.cpus: PSTATE := 0x3cd
build/ARM/cpu/kvm/base.cc:863: panic: KVM: Failed to set register
(0x6030000000100042) value (errno: 22)
Memory Usage: 2693544 KBytes
Program aborted at tick 0
… …
-------------------------------------------------------------------------------------------------------------------------------
This register 0x6030000000100042 is legal and 64-bit based on the document at
the link: https://www.kernel.org/doc/Documentation/virtual/kvm/api.txt
What could be the reason for this? ARM CPU or software or anything else?
Any tips/suggestions are appreciated.
Thanks in advance.
All the best,
Xiongfei Liao
===================================================
The environment settings are as below.
Host:
ARM server: Ampere eMag 2019
OS & Kernel: Ubuntu 20.04.5 LTS (GNU/Linux 5.4.0-131-generic aarch64)
Simulator:
gem5: cloned on Oct 27, 2022
bootloader: gem5 binaries 20220707/binaries/boot.arm64
kernel: gem5 binaries 20220707/binaries/vmlinux.arm64
disk: gem5 binaries ubuntu-18.04-arm64-docker.img
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