From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CD15B33986 for ; Tue, 8 Oct 2024 17:43:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728409406; cv=none; b=iYbtxrQkqnkRTEkNb06qhZdWoSV8pCRLRoqxan+r+8Xic47AJxxnIou0ufGI0ZPIKj0F6KfOtOb2+uAsODN4NSaLlj1JMmMT9j2uLu3tJTuD2lF2HdR/oikjgor16lUBjagBRRXFYJnAgCqKF+/t1pdGBP4LG6LB7uM/C1MG76g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728409406; c=relaxed/simple; bh=gD4IV0WFh7+duOYa96fR9zauhsOrR4tkGS95Bis7DtQ=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=sn3TCxIpGccr4nYAS69mxwzdzNFWJP8o/KyU2DMwGuFZgEfyQQWX7ZcyARW15cWwwMrnWJCUhFCps513kNXRFgn9Jq8ASqFDygnEKYgupls/fRLrxu4+BElMAFaNhLs11t9N+oxbZGkrKGNLRIQ6Jkiq4F6TzpdU8GhbokLY8fE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=eO6+1Ugz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="eO6+1Ugz" Received: by smtp.kernel.org (Postfix) with ESMTPS id 691EBC4CED4 for ; Tue, 8 Oct 2024 17:43:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728409406; bh=gD4IV0WFh7+duOYa96fR9zauhsOrR4tkGS95Bis7DtQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=eO6+1Ugz4S35J21fUlnT27aaYxJ09oNo3fm2ksUMb//S+wi2kKGyiZTKcA6guMPSd PxBfHj6UYmSIxYU1+rhFCwUsZvpJQUQJhxIgSuUseFWJLEv3Z5zsTGxvw9xmM7wQtY gvi8G2z2kcZtF6Bj3QsSt586H9xUgnrQFM7RQjsZiVu1DniXjMwbKI0C6BeVR3BiyI V8tUdVOhBQpGypYBs4aymkpI8JQpCD8VY/HahY89sF//LwFCkeQTNoMB2zJo45YibF bCyGFhZtdrQtnEiA5FbN0wX4IysbYe+amPvRbRd3OwH4BqyRmYb+DqXUClDoIoug5k y8OmoPGmSuO9w== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 61BE9C53BCA; Tue, 8 Oct 2024 17:43:26 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 219009] Random host reboots on Ryzen 7000/8000 using nested VMs (vls suspected) Date: Tue, 08 Oct 2024 17:43:25 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Product: Virtualization X-Bugzilla-Component: kvm X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: high X-Bugzilla-Who: mlevitsk@redhat.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: virtualization_kvm@kernel-bugs.osdl.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D219009 --- Comment #26 from mlevitsk@redhat.com --- But the question is - did they use nested virtualization on Linux actively = and with vls enabled? The use case which causes the reboots as I understand is Hyperv enabled Windows, in which case pretty much the whole Windows is running as a nested= VM, nested to the Hyperv hypervisor. Once I get my hands on a client Zen4 machine (I only have Zen2 at home), I = will also try to reproduce this but not promises when this will happen.=20 Meanwhile I really hope that someone from AMD can take a look a this, and either confirm that this is or will be fixed with a microcode patch or conf= irm that we have to disable vls on the affected CPUs. Best regards, Maxim Levitsky --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=