From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7CC86EB64DA for ; Mon, 10 Jul 2023 19:47:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230245AbjGJTrI (ORCPT ); Mon, 10 Jul 2023 15:47:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50434 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229921AbjGJTrH (ORCPT ); Mon, 10 Jul 2023 15:47:07 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4241C13E for ; Mon, 10 Jul 2023 12:47:06 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D4E79611C3 for ; Mon, 10 Jul 2023 19:47:05 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id 3E035C433D9 for ; Mon, 10 Jul 2023 19:47:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1689018425; bh=g6Z4oY/wf5I24Nstd+O4lQ0Eag6tsTUNNPnyMZam5gw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=FJ2Wpjx0i0wGfWgIblJQ/bynfGi6Zm56XHZDBq88+QXVFc9mMnURqU8stoeitgMK5 F7yXdgJEs8BBMxyTsVtTqPiywgPIM3t3ZnMhRsNQD8UN6BzDbE2iDUyAcYBMdMchSn Qyb2ozz3tSIRYp9OI/Ih7jp71qkgPKFMM9F3/e6UdHWtBbZvoXHpWANz5Qd0/pwiAA o/Cz+8dUTtdFnWTjBHZiYCsMyizgWItYnJ3JFmy3uJx7ZHW09s2v8O0wcqPg4vNhGb 4Eo01aoeJct6xnoRKhfFqfGm7TGPZNSnkA1Pm+2KFU8+wSIvm9jqPYVbXICoqkyc2K jF5t1nNzNo+Zg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 2ED07C4332E; Mon, 10 Jul 2023 19:47:05 +0000 (UTC) From: bugzilla-daemon@kernel.org To: kvm@vger.kernel.org Subject: [Bug 217307] windows guest entering boot loop when nested virtualization enabled and hyperv installed Date: Mon, 10 Jul 2023 19:47:04 +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: seanjc@google.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 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 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=3D217307 --- Comment #18 from Sean Christopherson (seanjc@google.com) --- > it seems that my problem is something that exclusively affects 12th gen a= nd > above Can you try running a single vCPU VM, and pin that vCPU to a pCPU on a P-Co= re?=20 If this is indeed specific to 12th gen CPUs, then my guess is that hybrid C= PUs are to blame. E.g. KVM already disables vPMU (commit 4d7404e5ee00 "KVM: x86/pmu: Disable vPMU support on hybrid CPUs (host PMUs)"), I wouldn't be at all surprised if there are more problems lurking. --=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.=