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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SIGNED_OFF_BY,SPF_PASS autolearn=unavailable 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 3EB60C43381 for ; Fri, 22 Feb 2019 10:18:09 +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 95D0420823 for ; Fri, 22 Feb 2019 10:18:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 95D0420823 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 lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 445S321VgZzDqQm for ; Fri, 22 Feb 2019 21:18:06 +1100 (AEDT) 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)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 445RN62zgQzDqLM for ; Fri, 22 Feb 2019 20:47:50 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: by ozlabs.org (Postfix, from userid 1034) id 445RN572ccz9sB8; Fri, 22 Feb 2019 20:47:49 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: fe1ef6bcdb4fca33434256a802a3ed6aacf0bd2f X-Patchwork-Hint: ignore In-Reply-To: <20190208143319.11980-1-mark.cave-ayland@ilande.co.uk> To: Mark Cave-Ayland , benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com, christophe.leroy@c-s.fr, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org From: Michael Ellerman Subject: Re: powerpc: fix 32-bit KVM-PR lockup and panic with MacOS guest Message-Id: <445RN572ccz9sB8@ozlabs.org> Date: Fri, 22 Feb 2019 20:47:49 +1100 (AEDT) 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: , Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, 2019-02-08 at 14:33:19 UTC, Mark Cave-Ayland wrote: > Commit 8792468da5e1 "powerpc: Add the ability to save FPU without giving it up" > unexpectedly removed the MSR_FE0 and MSR_FE1 bits from the bitmask used to > update the MSR of the previous thread in __giveup_fpu() causing a KVM-PR MacOS > guest to lockup and panic the kernel. > > Reinstate these bits to the MSR bitmask to enable MacOS guests to run under > 32-bit KVM-PR once again without issue. > > Signed-off-by: Mark Cave-Ayland Applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/fe1ef6bcdb4fca33434256a802a3ed6a cheers