Hi Salil,
On 8/7/24 11:27 PM, Salil Mehta wrote:
Let me figure out this. Have you also included the below patch along with the
architecture agnostic patch-set accepted in this Qemu cycle?
https://lore.kernel.org/all/20240801142322.3948866-3-peter.mayd...@linaro.org/
There are no vCPU fd to be parked and unparked when the core dump happenes. I
tried it, but didn't help. I added more debugging messages and the core dump is
triggered in the following path. It seems 'cpu->sve_vq.map' isn't correct since
it's populated in CPU realization path, and those non-cold-booted CPUs aren't
realized in the booting stage.
# dmesg | grep "Scalable Vector Extension"
[ 0.117121] CPU features: detected: Scalable Vector Extension
# start_vm
===> machvirt_init: create CPU object (idx=0, type=[host-arm-cpu])
cpu_common_initfn
arm_cpu_initfn
aarch64_cpu_initfn
aarch64_cpu_instance_init
aarch64_host_initfn
arm_cpu_post_init
===> machvirt_init: realize CPU object (idx=0)
virt_cpu_pre_plug
arm_cpu_realizefn
cpu_common_realizefn
virt_cpu_plug
===> machvirt_init: create CPU object (idx=1, type=[host-arm-cpu])
cpu_common_initfn
arm_cpu_initfn
aarch64_cpu_initfn
aarch64_cpu_instance_init
aarch64_host_initfn
arm_cpu_post_init
kvm_arch_init_vcpu: Error -22 from kvm_arm_sve_set_vls()
qemu-system-aarch64: Failed to initialize host vcpu 1
Aborted (core dumped)
Thanks,
Gavin
With this series and latest upstream Linux kernel (host), I ran into core
dump as below.
I'm not sure if it's a known issue or not.
# uname -r
6.11.0-rc2-gavin+
# /home/gavin/sandbox/qemu.main/build/qemu-system-aarch64 -accel
kvm \
-machine virt,gic-version=host,nvdimm=on -cpu host \
-smp maxcpus=2,cpus=1,sockets=2,clusters=1,cores=1,threads=1 \
-m 4096M,slots=16,maxmem=128G \
-object memory-backend-ram,id=mem0,size=2048M \
-object memory-backend-ram,id=mem1,size=2048M \
-numa node,nodeid=0,memdev=mem0,cpus=0-0 \
-numa node,nodeid=1,memdev=mem1,cpus=1-1 \
:
qemu-system-aarch64: Failed to initialize host vcpu 1 Aborted (core
dumped)
# gdb /var/lib/systemd/coredump/core.0
/home/gavin/sandbox/qemu.main/build/qemu-system-aarch64
(gdb) bt
#0 0x0000ffff9eec42e8 in __pthread_kill_implementation () at
/lib64/libc.so.6
#1 0x0000ffff9ee7c73c in raise () at /lib64/libc.so.6
#2 0x0000ffff9ee69034 in abort () at /lib64/libc.so.6
#3 0x0000aaaac71152c0 in kvm_arm_create_host_vcpu
(cpu=0xaaaae4c0cb80)
at ../target/arm/kvm.c:1093
#4 0x0000aaaac7057520 in machvirt_init (machine=0xaaaae48198c0) at
../hw/arm/virt.c:2534
#5 0x0000aaaac6b0d31c in machine_run_board_init
(machine=0xaaaae48198c0, mem_path=0x0, errp=0xfffff754ee38) at
../hw/core/machine.c:1576
#6 0x0000aaaac6f58d70 in qemu_init_board () at ../system/vl.c:2620
#7 0x0000aaaac6f590dc in qmp_x_exit_preconfig (errp=0xaaaac8911120
<error_fatal>)
at ../system/vl.c:2712
#8 0x0000aaaac6f5b728 in qemu_init (argc=82, argv=0xfffff754f1d8) at
../system/vl.c:3758
#9 0x0000aaaac6a5315c in main (argc=82, argv=0xfffff754f1d8) at
../system/main.c:47
Thanks,
Gavin
