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=-3.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,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 C9F6CC2D0A8 for ; Mon, 28 Sep 2020 09:37:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99EAF22204 for ; Mon, 28 Sep 2020 09:37:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726605AbgI1JhA (ORCPT ); Mon, 28 Sep 2020 05:37:00 -0400 Received: from wout4-smtp.messagingengine.com ([64.147.123.20]:39905 "EHLO wout4-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726477AbgI1JhA (ORCPT ); Mon, 28 Sep 2020 05:37:00 -0400 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.west.internal (Postfix) with ESMTP id 62578C66; Mon, 28 Sep 2020 05:36:59 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Mon, 28 Sep 2020 05:36:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm3; bh=6ctkZH bGTWXsVkzKL8+ez/1CD+AU2VN/Vmr5jwB22kc=; b=r/KCV/zr9Ti8I4OKtZhpZH /ZKKgAXXxAdzC8dVNql7QmDU4U4cVuy7hbTRewz7unu6PNXsJ5FxskFFZxl90omd WBmg2GD9ZTJA1SGR7AIl2f6gfseavYFHk8wlaMY4S4jGBs/2RwU/kQGlatwPveHY RkoDXHOELXj78soMI1S8o0oLdUr2zk3aLNGErWJ1RupPMhFjbXiSrSyGq4SIzePI I1NcWpgMHVeFvKUJTfZADEhJdL5Fi/EXx0r8U5b1fammw1AiIFMTl1nGv/g7kXzb v97bTDRlS/lm5oG/pJl46fKx27v3PJPgLGPR9msTVCFPPY/CfibLmzy/P1T7nLQg == X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrvdeigddulecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpeffhffvuffkfhggtggujgesghdtreertddtjeenucfhrhhomhepofgrrhgvkhcu ofgrrhgtiiihkhhofihskhhiqdfikphrvggtkhhiuceomhgrrhhmrghrvghksehinhhvih hsihgslhgvthhhihhnghhslhgrsgdrtghomheqnecuggftrfgrthhtvghrnhepteevffei gffhkefhgfegfeffhfegveeikeettdfhheevieehieeitddugeefteffnecukfhppeelud drieegrddujedtrdekleenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhgr ihhlfhhrohhmpehmrghrmhgrrhgvkhesihhnvhhishhisghlvghthhhinhhgshhlrggsrd gtohhm X-ME-Proxy: Received: from mail-itl (ip5b40aa59.dynamic.kabel-deutschland.de [91.64.170.89]) by mail.messagingengine.com (Postfix) with ESMTPA id 7F07F3280059; Mon, 28 Sep 2020 05:36:57 -0400 (EDT) Date: Mon, 28 Sep 2020 11:36:54 +0200 From: Marek =?utf-8?Q?Marczykowski-G=C3=B3recki?= To: =?utf-8?B?SsO8cmdlbiBHcm/Dnw==?= Cc: Denis Efremov , Jens Axboe , linux-block@vger.kernel.org, xen-devel , Roman Shaposhnik , Thomas Gleixner Subject: Re: Kernel panic on 'floppy' module load, Xen HVM, since 4.19.143 Message-ID: <20200928093654.GW1482@mail-itl> References: <20200927111405.GJ3962@mail-itl> <26fe7920-d6a8-fb8a-b97c-59565410eff4@suse.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="2+XEzv9QEhmMrrEN" Content-Disposition: inline In-Reply-To: <26fe7920-d6a8-fb8a-b97c-59565410eff4@suse.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org --2+XEzv9QEhmMrrEN Content-Type: text/plain; protected-headers=v1; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: Kernel panic on 'floppy' module load, Xen HVM, since 4.19.143 On Mon, Sep 28, 2020 at 07:02:19AM +0200, J=C3=BCrgen Gro=C3=9F wrote: > On 27.09.20 13:14, Marek Marczykowski-G=C3=B3recki wrote: > > Hi all, > >=20 > > I get kernel panic on 'floppy' module load. If I blacklist the module, > > then everything works. > > The issue happens in Xen HVM, other virtualization modes (PV, PVH) works > > fine. PV dom0 works too. I haven't tried bare metal, but I assume it > > works fine too. >=20 > Could you please try bare metal? I don't have any hw with floppy controller at hand... Booting on what I have, it works, loading floppy just says -ENODEV. > Working in PV and PVH mode, but not in HVM, is pointing towards either > an issue in IRQ handling (not Xen specific) or in qemu. >=20 > It might be that Xen is advertising a rarely used APIC mode. In case > bare metal is working it might be helpful to have APIC related boot > message differences between HVM guest and bare metal. --=20 Best Regards, Marek Marczykowski-G=C3=B3recki Invisible Things Lab A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? --2+XEzv9QEhmMrrEN Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEhrpukzGPukRmQqkK24/THMrX1ywFAl9xrrUACgkQ24/THMrX 1yxZoQf/UQsoHA6L/pBhHrpQ9iyJPYVA+o3GzS/LAhdKQWTyaot8Uksznsk6Danm Lq/CLQMNTwD7643mcoHshPrc6WhqZZvofLIsx1pDeXJArzgZQ6MObvd0sNm++X6s sGlU6nPeqWeZeRmZq1R5dsqrXjk8XlI/MfxspwNMDHNJTeFrFLbBtPPbAHDP0KuF 0pib6ULnw/g5k+WbPKhq3xBzTlH5cSxz3DgIGT76H29CrD103PL1xhAjRB/gFN0w xP+XAbjuxsn2IfjQEflLlyCARaFBS60LvCEI5YRIljXIVxUdfhEJlLR8myt0yOLg sVxSK29dsfW/aG5SKMrH5U0hX/3b3A== =ubn6 -----END PGP SIGNATURE----- --2+XEzv9QEhmMrrEN--