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Fri, 03 Apr 2026 07:13:19 -0700 (PDT) Date: Fri, 3 Apr 2026 07:13:18 -0700 In-Reply-To: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: Message-ID: Subject: Re: [Bug 221249] New: kvm_amd prints "CPU 1 isn't AMD or Hygon" on Intel Core Ultra (Arch Linux) From: Sean Christopherson To: bugzilla-daemon@kernel.org Cc: kvm@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Mon, Mar 16, 2026, bugzilla-daemon@kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=221249 > > Bug ID: 221249 > Summary: kvm_amd prints "CPU 1 isn't AMD or Hygon" on Intel > Core Ultra (Arch Linux) > Product: Virtualization > Version: unspecified > Hardware: Intel > OS: Linux > Status: NEW > Severity: normal > Priority: P3 > Component: kvm > Assignee: virtualization_kvm@kernel-bugs.osdl.org > Reporter: thisisamirv@gmail.com > Regression: No > > Created attachment 309692 > --> https://bugzilla.kernel.org/attachment.cgi?id=309692&action=edit > log > > I am observing the following kernel message on a Lenovo ThinkPad X9-14 Gen 1 > running Arch Linux on an Intel CPU: > > kvm_amd: CPU 1 isn't AMD or Hygon > > # System information > > Kernel: 6.19.6-arch1-1 > Distribution: Arch Linux ... > kvm_amd: CPU 1 isn't AMD or Hygon > > * The system does not have an AMD CPU. > * It appears the kvm_amd module may be probed or initialized briefly > even on Intel systems. This is highly unlikely to be an upstream kernel bug. The unwanted probing is most likely coming from elsewhere. Given that the out-of-tree VirtualBox driver loads shortly after the failed kvm_amd.ko load, my guess is that vboxdrv is the culprit. [ 3.087169] kvm_amd: CPU 1 isn't AMD or Hygon [ 3.118021] vboxdrv: module uses symbol (cr4_read_shadow) from namespace module:kvm,kvm-amd,kvm-intel, but does not import it. [ 3.118032] vboxdrv: module uses symbol (__flush_tlb_all) from namespace module:kvm,kvm-amd,kvm-intel, but does not import it. [ 3.118063] vboxdrv: module uses symbol (cr4_update_irqsoff) from namespace module:kvm,kvm-amd,kvm-intel, but does not import it. [ 3.124334] vboxdrv: Found 8 processor cores/threads [ 3.152502] rtR0InitNative: g_pLnxInitMm=000000000ba3e8e7 [ 3.181635] vboxdrv: Found KVM hardware-virtualization symbols [ 3.181638] vboxdrv: TSC mode is Invariant, tentative frequency 3302385743 Hz [ 3.181641] vboxdrv: Successfully loaded version 7.2.6 r172322 (interface 0x00340002) FWIW, attempting to load kvm_{amd,intel}.ko on the "wrong" CPU is benign other than the error message.