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 08BE3C433E1 for ; Fri, 21 Aug 2020 01:11:00 +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 594EE20748 for ; Fri, 21 Aug 2020 01:10:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=anastas.io header.i=@anastas.io header.b="O2Re018r" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 594EE20748 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=anastas.io 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 4BXk3h0cZvzDr41 for ; Fri, 21 Aug 2020 11:10:56 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=anastas.io (client-ip=104.248.188.109; helo=alpha.anastas.io; envelope-from=shawn@anastas.io; receiver=) Authentication-Results: lists.ozlabs.org; dmarc=pass (p=quarantine dis=none) header.from=anastas.io Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=anastas.io header.i=@anastas.io header.a=rsa-sha256 header.s=mail header.b=O2Re018r; dkim-atps=neutral Received: from alpha.anastas.io (alpha.anastas.io [104.248.188.109]) (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 4BXk1F1vpfzDqXm for ; Fri, 21 Aug 2020 11:08:49 +1000 (AEST) Received: from authenticated-user (alpha.anastas.io [104.248.188.109]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by alpha.anastas.io (Postfix) with ESMTPSA id 0EB4C7EC65; Thu, 20 Aug 2020 20:08:44 -0500 (CDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=anastas.io; s=mail; t=1597972125; bh=MbgYPiMEkuBmTEhlcG3CMB4hGpodkI3r5q5EjzwvMFw=; h=From:To:Cc:Subject:Date:From; b=O2Re018rwO/xupMIPCeSpZN9Tj/p+X9f2BZes/GfXOjGhhfgItfRFaadDTl32m1Y5 dxz9Uv4xb6BrS5eW0/qCSMbYkX8nucDRVCbX+HLVUlWLwCMEMOKYxOqmnbZdu3KD8h M6DUQdgmHvGy8v3wnpdaUnpC/kQdPA76yUmpo+dzKz7FRQ+dNvIBiSYRXpjKRQ5vrJ vbmxkgvu+w5+HeZWjjEY8X9TstyT68ukLYPUybrnLdpTHnBWe1dJWVp7C6O/ntTWQR cfiQDL7K8SoLJ5PZ2vCooYcVw1xNd4jhbDKECJBLSgDfoIjOlQ3mJfd6JpjRgkXWbt 4GjGZycM8me9Q== From: Shawn Anastasio To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH 0/2] Reintroduce PROT_SAO Date: Thu, 20 Aug 2020 20:08:35 -0500 Message-Id: <20200821010837.4079-1-shawn@anastas.io> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: npiggin@gmail.com Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This set re-introduces the PROT_SAO prot flag removed in Commit 5c9fa16e8abd ("powerpc/64s: Remove PROT_SAO support"). To address concerns regarding live migration of guests using SAO to P10 hosts without SAO support, the flag is disabled by default in LPARs. A new config option, PPC_PROT_SAO_LPAR was added to allow users to explicitly enable it if they will not be running in an environment where this is a conern. Shawn Anastasio (2): Revert "powerpc/64s: Remove PROT_SAO support" powerpc/64s: Disallow PROT_SAO in LPARs by default arch/powerpc/Kconfig | 12 ++++++ arch/powerpc/include/asm/book3s/64/pgtable.h | 8 ++-- arch/powerpc/include/asm/cputable.h | 10 ++--- arch/powerpc/include/asm/mman.h | 31 ++++++++++++-- arch/powerpc/include/asm/nohash/64/pgtable.h | 2 + arch/powerpc/include/uapi/asm/mman.h | 2 +- arch/powerpc/kernel/dt_cpu_ftrs.c | 2 +- arch/powerpc/mm/book3s64/hash_utils.c | 2 + include/linux/mm.h | 2 + include/trace/events/mmflags.h | 2 + mm/ksm.c | 4 ++ tools/testing/selftests/powerpc/mm/.gitignore | 1 + tools/testing/selftests/powerpc/mm/Makefile | 4 +- tools/testing/selftests/powerpc/mm/prot_sao.c | 42 +++++++++++++++++++ 14 files changed, 107 insertions(+), 17 deletions(-) create mode 100644 tools/testing/selftests/powerpc/mm/prot_sao.c -- 2.28.0