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 1A1DCC433F5 for ; Wed, 27 Apr 2022 12:55:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234939AbiD0M6c (ORCPT ); Wed, 27 Apr 2022 08:58:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234912AbiD0M6c (ORCPT ); Wed, 27 Apr 2022 08:58:32 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0E5CEDFAD for ; Wed, 27 Apr 2022 05:55:21 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id AC4B5B8268B for ; Wed, 27 Apr 2022 12:55:19 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8B3AC385A7; Wed, 27 Apr 2022 12:55:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1651064118; bh=ik025cWnUzwdoaHADK+8h2P9IwsEUWm7IYWCYLZ3Jmg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=T+i0/1kDtoLN4lXDDBShq+2y/9AjkB2EDS2HGL59B2GVbZVSHFLMFI2iTGmhB55Pm G2qJ7eRlYss/3N16yNlEjyQHtH6m5Xn2Gg+bkgFFm130OzwdDYUgXYEN3vS111WcxV RunHMvRYgf2B+/9ehX3uFKa0N3fWlJT2Y01yHeYuZeXv87rIMA6mNC+B0r+NdXuSGa F6gJ/XrReTvS+1IYdxynJ/UwVynkvISIfRmoZDttysELDFY8p3EIdnzIjMdAh1N0wL twIYyIoL72QOiOO74U0gIxogwtz6FS/osi9ScCyYjCYuIc4gqzYYxztSpYI5tebGsm YlXq5skDtDSwg== Date: Wed, 27 Apr 2022 13:55:11 +0100 From: Mark Brown To: Marek Szyprowski Cc: Catalin Marinas , Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan , Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , Luca Salabrino , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu Subject: Re: [PATCH v14 27/39] arm64/sme: Provide Kconfig for SME Message-ID: References: <20220419112247.711548-1-broonie@kernel.org> <20220419112247.711548-28-broonie@kernel.org> <64573cca-4bd6-a65e-0ba2-867c6488e82c@samsung.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="2+6n7qNJEoo8AZc1" Content-Disposition: inline In-Reply-To: <64573cca-4bd6-a65e-0ba2-867c6488e82c@samsung.com> X-Cookie: Buckle up! Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org --2+6n7qNJEoo8AZc1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 27, 2022 at 12:14:32AM +0200, Marek Szyprowski wrote: > This patchset landed in linux next-20220426. By default SME is enabled=20 > and it breaks CPU hot-plug on all my arm64 test systems. Bisect points=20 > this patch, because it finally enables this feature. Here is a report=20 > from QEMU's arm64 virt machine: This is the cpucaps infrastructure not being able to cope with FA64 since it's in a register which is only there if the base SME feature is there. It works during boot because we have custom code for walking through the registers there, and it works for the hwcaps for both SVE and SME because at first look we don't seem to recheck them for secondaries. --2+6n7qNJEoo8AZc1 Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmJpPS4ACgkQJNaLcl1U h9Cm/gf/XectKTe1EPTDGmPeHt7Fg7pjBk2H/X3bRTO4VmKCmI1P6wPHSWH4Ptuz iSzT5q3m/XwjpS5B1z9ENjQ5NQ6zC3fMlxM1qHfP+qZsmpob4YCHQldLcz2csfSU d93ZoESxuheQ0+NGOXdhu9cl2vudTkiDeoqlJZca33anZj8+wi+eIefciDrnJ9fk /QfoA1uIBhxeqvSo2EEvi3FP1RmxioztTOFI+XH9TqRmy2jx40kfXMcb6qqUQfc0 GZkEqViat/I/x/f6yUQ6oIhR+q1t85gc+jQz9dkb8TyHI6NgTR3ySIekdezwCgSW 2G8Eee5LXK21k5wIOM0WkIeFSE/iGA== =MFEc -----END PGP SIGNATURE----- --2+6n7qNJEoo8AZc1--