On 10/01/22 10:02, Richard W.M. Jones wrote:
On Sat, Oct 01, 2022 at 02:07:30AM +0000, Bryce Zimmer wrote:
See the attached output of libguestfs-test-tool.
I’m trying to mount an image to eve-ng VM using their instructions and ran into an error.
These are the instructions I was following.
https://www.eve-ng.net/index.php/documentation/howtos/2822-2/
Please let me know if you have any questions or if I can help in any way.
qemu-system-x86_64: error: failed to set MSR 0x48f to 0x7fffff00036dfb qemu-system-x86_64: /build/qemu-aXkhnW/qemu-4.2/target/i386/kvm.c:2691: kvm_buf_set_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
It's a bug in qemu. I'm not sure exactly which qemu bug but if you search for "error: failed to set MSR 0x48f" you'll find a few references which seem to be related to nested virt:
https://bugs.launchpad.net/qemu/+bug/1879646
https://communities.vmware.com/t5/ESXi-Discussions/ESXI-QEMU-Nested-Virtuali...
You can work around it (although it'll be slow) using:
Alternatively, I think it might help if Bryce passed the "ignore_msrs=Y" parameter to the "kvm" kernel module. (If it's indeed nested virt, then I think passing this param to the L0 kernel module would be more important than passing it to the L1 one.) Laszlo