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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no 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 958EBC433DF for ; Wed, 27 May 2020 12:31:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62D292078B for ; Wed, 27 May 2020 12:31:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729807AbgE0MbQ (ORCPT ); Wed, 27 May 2020 08:31:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54210 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728859AbgE0MbQ (ORCPT ); Wed, 27 May 2020 08:31:16 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2C67BC08C5C1 for ; Wed, 27 May 2020 05:31:16 -0700 (PDT) Received: from p5de0bf0b.dip0.t-ipconnect.de ([93.224.191.11] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1jdvCA-0001lZ-I0; Wed, 27 May 2020 14:30:06 +0200 Received: by nanos.tec.linutronix.de (Postfix, from userid 1000) id A9496100D19; Wed, 27 May 2020 14:30:04 +0200 (CEST) From: Thomas Gleixner To: Wei Liu , Boqun Feng Cc: LKML , Andy Lutomirski , Andrew Cooper , X86 ML , "Paul E. McKenney" , Alexandre Chartre , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon , Tom Lendacky , Wei Liu , Michael Kelley , Jason Chen CJ , Zhao Yakui , "Peter Zijlstra \(Intel\)" Subject: Re: [patch V9 30/39] x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC In-Reply-To: <20200527083803.gpigonfy2kd2g5t4@debian> References: <20200521200513.656533920@linutronix.de> <20200521202119.647997594@linutronix.de> <20200527014616.GA123239@debian-boqun.qqnc3lrjykvubdpftowmye0fmh.lx.internal.cloudapp.net> <20200527083803.gpigonfy2kd2g5t4@debian> Date: Wed, 27 May 2020 14:30:04 +0200 Message-ID: <87mu5tpnlf.fsf@nanos.tec.linutronix.de> MIME-Version: 1.0 Content-Type: text/plain X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Wei Liu writes: > On Wed, May 27, 2020 at 09:46:16AM +0800, Boqun Feng wrote: > VMBus is being loaded. That gives me some clue. > > I notice a hunk in the patch: > > @@ -331,17 +327,19 @@ static void __init ms_hyperv_init_platfo > x86_platform.apic_post_init = hyperv_init; > hyperv_setup_mmu_ops(); > /* Setup the IDT for hypervisor callback */ > - alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector); > + alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, sysvec_hyperv_callback); > > It is not using the asm variant. > > Could this be the culprit? Thomas? Of course ... Sorry