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=-9.6 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT 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 8719BC433E2 for ; Fri, 3 Jul 2020 01:20:23 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4294920737 for ; Fri, 3 Jul 2020 01:20:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="XvguNpRZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4294920737 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id E004E8D0036; Thu, 2 Jul 2020 21:20:22 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id D89208D0021; Thu, 2 Jul 2020 21:20:22 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id C52DD8D0036; Thu, 2 Jul 2020 21:20:22 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0246.hostedemail.com [216.40.44.246]) by kanga.kvack.org (Postfix) with ESMTP id AA0A78D0021 for ; Thu, 2 Jul 2020 21:20:22 -0400 (EDT) Received: from smtpin17.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 7627E52D0 for ; Fri, 3 Jul 2020 01:20:22 +0000 (UTC) X-FDA: 76995009084.17.walk96_1d0941326e8d Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin17.hostedemail.com (Postfix) with ESMTP id 53831180D0184 for ; Fri, 3 Jul 2020 01:20:22 +0000 (UTC) X-HE-Tag: walk96_1d0941326e8d X-Filterd-Recvd-Size: 5127 Received: from mail-pj1-f65.google.com (mail-pj1-f65.google.com [209.85.216.65]) by imf29.hostedemail.com (Postfix) with ESMTP for ; Fri, 3 Jul 2020 01:20:21 +0000 (UTC) Received: by mail-pj1-f65.google.com with SMTP id c1so5995299pja.5 for ; Thu, 02 Jul 2020 18:20:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=o8LwC+qktyP8ZqLNY6wHCDbWY3Ky3sWMv7KAmaONrVU=; b=XvguNpRZTZP/h71d93R73VBOlM08LPuaeOBlneU63ne/L7GLBObyffyWirquXwzInf 59t68Sik6FbFSfnqXHjB9LmnXjakPzB8VDLhS/RbAAziGzaIv+Sncs0FV3mfuwzt7AFX gLIt/5rvF/ONaC+jkxf2MHxcxslGczknFLwtC238Vw3nzbqnGFqV8b/1ZJa8Y8QQIItG 9Q/OubfWO1HtogwuIrDelys65tKh+KSZwYhYusdsiQpYyLUqDXDGhCJ8eqvU0LILRmeB jRgxPziUKmXugrRCu8qc6vh58u4756iZfl8/VXOQRfMPFab7InZAUaLJIz7aueuRVuYF x2bg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=o8LwC+qktyP8ZqLNY6wHCDbWY3Ky3sWMv7KAmaONrVU=; b=LQU6CrN9xlGAd3AFhsT3A3VvssdE7Czo5AX0ShRvV1hbMIT/nUCKs7Of+XSr7KSYCI QC8nn7rb3TTHm6c6kbGMJ/0RxCLX/nVwcpX1GZVryF/Sysb233PysiFnyqAk17RZtxfZ UXPdSaQZiIbOa1Z6d6PynlRFSFSAW3BFiUoB6KnXUW6BeFHD/Rch2Hzdtktm4fe6MUrD YeZLRNAJIFg6HIh4OTsxoSL3TMT9VlhjhiACVzL6HSUKU4c65ZISmsoMMB4kvzPpJVT6 4vQ19UWl0Qj3792rqlIfIml36gV1Vs9jeFi5JQlPkYnkniLIj4NrR5cxuMyxtn+4Ajvr WbSA== X-Gm-Message-State: AOAM53320PJCpZO29ax0kZtWlLPmLPGK05iDpnJ5Xqpfl6qJgU9/2Gwy lrCYs9sYdIldxioc4VB2vTrDju8Z X-Google-Smtp-Source: ABdhPJzjRaAlp7XO//YM/8n2zmmXsVRaggi4uCA028UZFvDs8+H+qXrObFXTvNH00boHgly3COvZYw== X-Received: by 2002:a17:90a:e618:: with SMTP id j24mr4699964pjy.41.1593739221038; Thu, 02 Jul 2020 18:20:21 -0700 (PDT) Received: from bobo.ozlabs.ibm.com (61-68-186-125.tpgi.com.au. [61.68.186.125]) by smtp.gmail.com with ESMTPSA id v186sm10094222pfv.141.2020.07.02.18.20.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Jul 2020 18:20:20 -0700 (PDT) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Cc: Nicholas Piggin , kvm-ppc@vger.kernel.org, linux-mm@kvack.org, linux-api@vger.kernel.org Subject: [PATCH v2 3/3] powerpc/64s/hash: disable subpage_prot syscall by default Date: Fri, 3 Jul 2020 11:19:58 +1000 Message-Id: <20200703011958.1166620-4-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200703011958.1166620-1-npiggin@gmail.com> References: <20200703011958.1166620-1-npiggin@gmail.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 53831180D0184 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: The subpage_prot syscall was added for specialised system software (Lx86) that has been discontinued for about 7 years, and is not thought to be used elsewhere, so disable it by default. Signed-off-by: Nicholas Piggin --- arch/powerpc/Kconfig | 7 +++++-- arch/powerpc/configs/powernv_defconfig | 1 - arch/powerpc/configs/pseries_defconfig | 1 - 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 9fa23eb320ff..04c6ca17661a 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -833,13 +833,16 @@ config FORCE_MAX_ZONEORDER this in mind when choosing a value for this option. =20 config PPC_SUBPAGE_PROT - bool "Support setting protections for 4k subpages" + bool "Support setting protections for 4k subpages (subpage_prot syscall= )" + default n depends on PPC_BOOK3S_64 && PPC_64K_PAGES help - This option adds support for a system call to allow user programs + This option adds support for system call to allow user programs to set access permissions (read/write, readonly, or no access) on the 4k subpages of each 64k page. =20 + If unsure, say N here. + config PPC_COPRO_BASE bool =20 diff --git a/arch/powerpc/configs/powernv_defconfig b/arch/powerpc/config= s/powernv_defconfig index 2de9aadf0f50..afc0dd73a1e6 100644 --- a/arch/powerpc/configs/powernv_defconfig +++ b/arch/powerpc/configs/powernv_defconfig @@ -64,7 +64,6 @@ CONFIG_HWPOISON_INJECT=3Dm CONFIG_TRANSPARENT_HUGEPAGE=3Dy CONFIG_DEFERRED_STRUCT_PAGE_INIT=3Dy CONFIG_PPC_64K_PAGES=3Dy -CONFIG_PPC_SUBPAGE_PROT=3Dy CONFIG_SCHED_SMT=3Dy CONFIG_PM=3Dy CONFIG_HOTPLUG_PCI=3Dy diff --git a/arch/powerpc/configs/pseries_defconfig b/arch/powerpc/config= s/pseries_defconfig index dfa4a726333b..894e8d85fb48 100644 --- a/arch/powerpc/configs/pseries_defconfig +++ b/arch/powerpc/configs/pseries_defconfig @@ -57,7 +57,6 @@ CONFIG_MEMORY_HOTREMOVE=3Dy CONFIG_KSM=3Dy CONFIG_TRANSPARENT_HUGEPAGE=3Dy CONFIG_PPC_64K_PAGES=3Dy -CONFIG_PPC_SUBPAGE_PROT=3Dy CONFIG_SCHED_SMT=3Dy CONFIG_HOTPLUG_PCI=3Dy CONFIG_HOTPLUG_PCI_RPA=3Dm --=20 2.23.0