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=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS autolearn=ham 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 0A5D1C28CF8 for ; Mon, 15 Oct 2018 04:08:45 +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 84D9520652 for ; Mon, 15 Oct 2018 04:08:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 84D9520652 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 42YQ0p4J9gzF31s for ; Mon, 15 Oct 2018 15:08:42 +1100 (AEDT) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=ellerman.id.au Received: from ozlabs.org (bilbo.ozlabs.org [IPv6:2401:3900:2:1::2]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 42YPqv21RdzF26K for ; Mon, 15 Oct 2018 15:00:59 +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 42YPqt6XJnz9sCw; Mon, 15 Oct 2018 15:00:58 +1100 (AEDT) X-powerpc-patch-notification: thanks X-powerpc-patch-commit: bc276ecba132caccb1fda5863a652c15def2b8c6 In-Reply-To: <20180827030302.17541-2-npiggin@gmail.com> To: Nicholas Piggin , linuxppc-dev@lists.ozlabs.org From: Michael Ellerman Subject: Re: [1/2] powerpc/64s/hash: do not use PPC_INVALIDATE_ERAT on CPUs before POWER9 Message-Id: <42YPqt6XJnz9sCw@ozlabs.org> Date: Mon, 15 Oct 2018 15:00:58 +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: , Cc: Nicholas Piggin Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Mon, 2018-08-27 at 03:03:01 UTC, Nicholas Piggin wrote: > PPC_INVALIDATE_ERAT is slbia IH=7 which is a new variant introduced > with POWER9, and the result is undefined on earlier CPUs. > > Commits 7b9f71f974 ("powerpc/64s: POWER9 machine check handler") and > d4748276ae ("powerpc/64s: Improve local TLB flush for boot and MCE on > POWER9") caused POWER7/8 code to use this instruction. Remove it. An > ERAT flush can be made by invalidatig the SLB, but before POWER9 that > requires a flush and rebolt. > > Fixes: 7b9f71f974 ("powerpc/64s: POWER9 machine check handler") > Fixes: d4748276ae ("powerpc/64s: Improve local TLB flush for boot and > MCE on POWER9") > Signed-off-by: Nicholas Piggin Series applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/bc276ecba132caccb1fda5863a652c cheers