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 X-Spam-Level: X-Spam-Status: No, score=-1.0 required=3.0 tests=MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69520C04AAF for ; Tue, 21 May 2019 14:17:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FBBB21773 for ; Tue, 21 May 2019 14:17:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728306AbfEUORg convert rfc822-to-8bit (ORCPT ); Tue, 21 May 2019 10:17:36 -0400 Received: from mail.wl.linuxfoundation.org ([198.145.29.98]:53132 "EHLO mail.wl.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726750AbfEUORg (ORCPT ); Tue, 21 May 2019 10:17:36 -0400 Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9CC1F28B93 for ; Tue, 21 May 2019 14:17:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9B25628BA3; Tue, 21 May 2019 14:17:35 +0000 (UTC) From: bugzilla-daemon@bugzilla.kernel.org To: kvm@vger.kernel.org Subject: [Bug 203543] Starting with kernel 5.1.0-rc6, kvm_intel can no longer be loaded in nested kvm/guests Date: Tue, 21 May 2019 14:17:33 +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: blocking X-Bugzilla-Who: sean.j.christopherson@intel.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: 8BIT X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-Virus-Scanned: ClamAV using ClamSMTP Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org https://bugzilla.kernel.org/show_bug.cgi?id=203543 --- Comment #11 from Sean Christopherson (sean.j.christopherson@intel.com) --- On Tue, May 21, 2019 at 07:11:01AM -0700, Sean Christopherson wrote: > On Tue, May 21, 2019 at 01:37:42PM +0000, bugzilla-daemon@bugzilla.kernel.org > wrote: > > https://bugzilla.kernel.org/show_bug.cgi?id=203543 > > > > --- Comment #10 from moi@davidchill.ca --- > > Reverting both commits solves this problem: > > > > f93f7ede087f2edcc18e4b02310df5749a6b5a61 > > e51bfdb68725dc052d16241ace40ea3140f938aa > > Hmm, that makes no sense, f93f7ede087f is a straight revert of > e51bfdb68725. I do see the same behavior on v5.2-rc1 where hiding the > pmu from L1 breaks nested virtualization, but manually reverting both > commits doesn't change that for me, i.e. there's another bug lurking, > which I'll start hunting. Scratch that, had a brain fart and tested the wrong kernel. I do *NOT* see breakage on v5.2-rc1, at least when running v5.2-rc1 as L1 and probing KVM in L2. When running v5.2-rc1 as L0, what are the values of MSRs 0x482 and 0x48e in L1? > > Any chance the successful test used a different command line or something? -- You are receiving this mail because: You are watching the assignee of the bug.