Hi x86 folks, While trying to reproduce on x86 an issue we're currently hitting on ppc, I got this:
$ ./x86_64-softmmu/qemu-system-x86_64 -snapshot -no-shutdown -nographic -machine q35,accel=kvm -smp 1,maxcpus=2 -serial mon:stdio -drive file=$HOME/images/fedora26-x86_64.qcow2,if=virtio QEMU 2.10.50 monitor - type 'help' for more information (qemu) device_add host-x86_64-cpu,socket-id=1,core-id=0,thread-id=0,id=foo (qemu) info cpus error: failed to get MSR 0x38d qemu-system-x86_64: /home/greg/Work/qemu/qemu-devel/target/i386/kvm.c:2121: kvm_get_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed. Aborted (core dumped) Same happens with a pc machine. But it doesn't happen if I use cpu-add instead of device_add: (qemu) cpu-add 1 (qemu) [ 8.335221] CPU1 has been hot-added (qemu) info cpus * CPU #0: pc=0xffffffffb08986e6 (halted) thread_id=23964 CPU #1: pc=0x00000000fffffff0 thread_id=24001 This is with the QEMU master branch SHA1 530049bc1dcc24c. Cheers, -- Greg
