[Bug 216017] KVM: problem virtualization from kernel 5.17.9

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=216017

--- Comment #2 from mlevitsk@redhat.com ---
On Mon, 2022-05-23 at 08:48 +0000, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=216017
> 
>             Bug ID: 216017
>            Summary: KVM: problem virtualization from kernel 5.17.9
>            Product: Virtualization
>            Version: unspecified
>     Kernel Version: 5.17.9-arch1-1
>           Hardware: AMD
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Keywords: opw
>           Severity: high
>           Priority: P1
>          Component: kvm
>           Assignee: virtualization_kvm@kernel-bugs.osdl.org
>           Reporter: ne-vlezay80@yandex.ru
>         Regression: No
> 
> Qemu periodically chaches width:
> 
> [root@router ne-vlezay80]# qemu-system-x86_64 -enable-kvm
> qemu-system-x86_64: error: failed to set MSR 0xc0000104 to 0x100000000
> qemu-system-x86_64: ../qemu-7.0.0/target/i386/kvm/kvm.c:2996:
> kvm_buf_set_msrs:
> Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
> Aborted (core dumped)

This is my fault. You can either revert the commit you found in qemu,
or update the kernel to 5.18.

> 
> Also if running virtual pachine width type -cpu host, system is freezez from
> kernel panic. 

Can you check if this happens with 5.18 as well? If so, try to capture the
panic message.


Best regards,
        Maxim Levitsky

> 
> Kernel version: 5.17.9
> Distribution: Arch Linux
> QEMU: 7.0
> CPU: AMD Phenom X4
> Arch: x86_64
>

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