From patchwork Wed May 12 14:49:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 436322 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=-16.6 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, UNWANTED_LANGUAGE_BODY, 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 CD31DC4361B for ; Wed, 12 May 2021 16:57:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ADE42611AE for ; Wed, 12 May 2021 16:57:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236845AbhELQ5r (ORCPT ); Wed, 12 May 2021 12:57:47 -0400 Received: from mail.kernel.org ([198.145.29.99]:35790 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244108AbhELQmf (ORCPT ); Wed, 12 May 2021 12:42:35 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id A7B9E61D1F; Wed, 12 May 2021 16:10:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1620835847; bh=mZqMfqIyQnFIX1dFL66/P3v+WkMGX+WqxDWMNiC+Lg0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BmTpoIcQDccY+xZHuq8qPz7b13DiKQQ7WL/74xbf/rcoC0XE1c78LEhHeeUhvN9Ci wKtzwJhOLrThyHa0sadFEiOAMrY+M3rbZvZ/XODOy/Vhi+THouroM77rfjkLZeKus8 0zD8BJzSBvH6u7yABSXX3rqXrFm65T0wsNrQAEMs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Michael Ellerman , Daniel Axtens , Sasha Levin Subject: [PATCH 5.12 508/677] powerpc/64s: Use htab_convert_pte_flags() in hash__mark_rodata_ro() Date: Wed, 12 May 2021 16:49:14 +0200 Message-Id: <20210512144854.257818887@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210512144837.204217980@linuxfoundation.org> References: <20210512144837.204217980@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Michael Ellerman [ Upstream commit 2c02e656a29d5f64193eb93da92781bcf0517146 ] In hash__mark_rodata_ro() we pass the raw PP_RXXX value to hash__change_memory_range(). That has the effect of setting the key to zero, because PP_RXXX contains no key value. Fix it by using htab_convert_pte_flags(), which knows how to convert a pgprot into a pp value, including the key. Fixes: d94b827e89dc ("powerpc/book3s64/kuap: Use Key 3 for kernel mapping with hash translation") Signed-off-by: Michael Ellerman Reviewed-by: Daniel Axtens Link: https://lore.kernel.org/r/20210331003845.216246-3-mpe@ellerman.id.au Signed-off-by: Sasha Levin --- arch/powerpc/mm/book3s64/hash_pgtable.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/mm/book3s64/hash_pgtable.c b/arch/powerpc/mm/book3s64/hash_pgtable.c index 567e0c6b3978..03819c259f0a 100644 --- a/arch/powerpc/mm/book3s64/hash_pgtable.c +++ b/arch/powerpc/mm/book3s64/hash_pgtable.c @@ -428,12 +428,14 @@ static bool hash__change_memory_range(unsigned long start, unsigned long end, void hash__mark_rodata_ro(void) { - unsigned long start, end; + unsigned long start, end, pp; start = (unsigned long)_stext; end = (unsigned long)__init_begin; - WARN_ON(!hash__change_memory_range(start, end, PP_RXXX)); + pp = htab_convert_pte_flags(pgprot_val(PAGE_KERNEL_ROX), HPTE_USE_KERNEL_KEY); + + WARN_ON(!hash__change_memory_range(start, end, pp)); } void hash__mark_initmem_nx(void)