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=-3.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,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 4D3BDC433DF for ; Wed, 26 Aug 2020 12:00:20 +0000 (UTC) Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A60AA20786 for ; Wed, 26 Aug 2020 12:00:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="WD366TFs" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A60AA20786 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from bilbo.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 4Bc4Dd0SR7zDqWy for ; Wed, 26 Aug 2020 22:00:17 +1000 (AEST) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4Bc4BH6wnbzDq8v for ; Wed, 26 Aug 2020 21:58:15 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=ellerman.id.au header.i=@ellerman.id.au header.a=rsa-sha256 header.s=201909 header.b=WD366TFs; dkim-atps=neutral Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 4Bc4BH2Qjqz9sTR; Wed, 26 Aug 2020 21:58:15 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1598443095; bh=MS+f0WHAHjfA6EqlylHw2U6qlVWZcTPnytdwjdmqqxo=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=WD366TFsG57J4YACK+ntB2t5tojZxsOSqUkCyu07896wqTOVYQ547sM8UmbagPOKM XzzLh5dbTmbQ+t++gRDzZpqdwA+u4zj7ZCbbx55t4Q514kgNpKKx249AIDe7/X0Ytv M2Rh9JyTqzfL+1snjI5sTN5Zk2suha2v6Z/Bq54/6tFDxQQyU8U4mASciteDL5h6da 70/fBJoMRNzLO667ShF9IQWrDbPwe0O8XVmDwJchJKo1YNXxC/PM3XVBqjcv13sQwG WgZ8rJ6qagEOt999C8qf+2LU3CY3isJzxf6AYXI00kkxGk5IzjJ7Z6RFGp+v9k5riY 3RqrjQRfC9TaQ== From: Michael Ellerman To: Greg KH , Thadeu Lima de Souza Cascardo Subject: Re: Please apply commit 0828137e8f16 ("powerpc/64s: Don't init FSCR_DSCR in __init_FSCR()") to v4.14.y, v4.19.y, v5.4.y, v5.7.y In-Reply-To: <20200826102929.GA3356257@kroah.com> References: <20200825224408.GB6060@mussarela> <20200826102929.GA3356257@kroah.com> Date: Wed, 26 Aug 2020 21:58:11 +1000 Message-ID: <87o8mxhb58.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: sashal@kernel.org, linuxppc-dev@lists.ozlabs.org, stable@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Greg KH writes: > On Tue, Aug 25, 2020 at 07:44:08PM -0300, Thadeu Lima de Souza Cascardo wrote: >> After commit 912c0a7f2b5daa3cbb2bc10f303981e493de73bd ("powerpc/64s: Save FSCR >> to init_task.thread.fscr after feature init"), which has been applied to the >> referred branches, when userspace sets the user DSCR MSR, it won't be inherited >> or restored during context switch, because the facility unavailable interrupt >> won't trigger. >> >> Applying 0828137e8f16721842468e33df0460044a0c588b ("powerpc/64s: Don't init >> FSCR_DSCR in __init_FSCR()") will fix it. Oops, thanks for catching it. Acked-by: Michael Ellerman > Now queued up, thanks. Thanks. cheers