From patchwork Tue Oct 9 13:51:54 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christophe Leroy X-Patchwork-Id: 10632697 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EA1931867 for ; Tue, 9 Oct 2018 13:53:45 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EDC86289A2 for ; Tue, 9 Oct 2018 13:53:45 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id DFA69289A6; Tue, 9 Oct 2018 13:53:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 67674289A6 for ; Tue, 9 Oct 2018 13:53:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726903AbeJIVJC (ORCPT ); Tue, 9 Oct 2018 17:09:02 -0400 Received: from pegase1.c-s.fr ([93.17.236.30]:61577 "EHLO pegase1.c-s.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726568AbeJIVJC (ORCPT ); Tue, 9 Oct 2018 17:09:02 -0400 Received: from localhost (mailhub1-int [192.168.12.234]) by localhost (Postfix) with ESMTP id 42TzDH0L7vz9ttg4; Tue, 9 Oct 2018 15:51:43 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at c-s.fr Received: from pegase1.c-s.fr ([192.168.12.234]) by localhost (pegase1.c-s.fr [192.168.12.234]) (amavisd-new, port 10024) with ESMTP id 49KTcDFjvrpM; Tue, 9 Oct 2018 15:51:42 +0200 (CEST) Received: from messagerie.si.c-s.fr (messagerie.si.c-s.fr [192.168.25.192]) by pegase1.c-s.fr (Postfix) with ESMTP id 42TzDG6pD2z9ttfw; Tue, 9 Oct 2018 15:51:42 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by messagerie.si.c-s.fr (Postfix) with ESMTP id A26E48B80B; Tue, 9 Oct 2018 15:51:54 +0200 (CEST) X-Virus-Scanned: amavisd-new at c-s.fr Received: from messagerie.si.c-s.fr ([127.0.0.1]) by localhost (messagerie.si.c-s.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id JFJZwxOjHIae; Tue, 9 Oct 2018 15:51:54 +0200 (CEST) Received: from pc13168vm.idsi0.si.c-s.fr (unknown [192.168.232.3]) by messagerie.si.c-s.fr (Postfix) with ESMTP id 63D608B80A; Tue, 9 Oct 2018 15:51:54 +0200 (CEST) Received: by pc13168vm.idsi0.si.c-s.fr (Postfix, from userid 0) id 127926F444; Tue, 9 Oct 2018 13:51:54 +0000 (UTC) Message-Id: In-Reply-To: References: From: Christophe Leroy Subject: [PATCH v3 11/24] powerpc/mm: don't use _PAGE_EXEC for calling hash_preload() To: Bartlomiej Zolnierkiewicz , Benjamin Herrenschmidt , Dominik Brodowski , Geoff Levand , Jens Axboe , Kumar Gala , Li Yang , Michael Ellerman , Nicholas Piggin , Paul Mackerras , Scott Wood , aneesh.kumar@linux.vnet.ibm.com Cc: linux-arm-kernel@lists.infradead.org, linux-block@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, dri-devel@lists.freedesktop.org Date: Tue, 9 Oct 2018 13:51:54 +0000 (UTC) Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The 'access' parameter of hash_preload() is either 0 or _PAGE_EXEC. Among the two versions of hash_preload(), only the PPC64 one is doing something with this 'access' parameter. In order to remove the use of _PAGE_EXEC outside platform code, 'access' parameter is replaced by 'is_exec' which will be either true of false, and the PPC64 version of hash_preload() creates the access flag based on 'is_exec'. Signed-off-by: Christophe Leroy --- arch/powerpc/mm/hash_utils_64.c | 3 ++- arch/powerpc/mm/mem.c | 9 +++++---- arch/powerpc/mm/mmu_decl.h | 2 +- arch/powerpc/mm/pgtable_32.c | 2 +- arch/powerpc/mm/ppc_mmu_32.c | 2 +- 5 files changed, 10 insertions(+), 8 deletions(-) diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c index 8ff03c7205a0..854edc3722e0 100644 --- a/arch/powerpc/mm/hash_utils_64.c +++ b/arch/powerpc/mm/hash_utils_64.c @@ -1482,7 +1482,7 @@ static bool should_hash_preload(struct mm_struct *mm, unsigned long ea) #endif void hash_preload(struct mm_struct *mm, unsigned long ea, - unsigned long access, unsigned long trap) + bool is_exec, unsigned long trap) { int hugepage_shift; unsigned long vsid; @@ -1490,6 +1490,7 @@ void hash_preload(struct mm_struct *mm, unsigned long ea, pte_t *ptep; unsigned long flags; int rc, ssize, update_flags = 0; + unsigned long access = _PAGE_PRESENT | _PAGE_READ | (is_exec ? _PAGE_EXEC : 0); BUG_ON(REGION_ID(ea) != USER_REGION_ID); diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c index cb421aeb7674..dd949d6649a2 100644 --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -509,7 +509,8 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, * We don't need to worry about _PAGE_PRESENT here because we are * called with either mm->page_table_lock held or ptl lock held */ - unsigned long access, trap; + unsigned long trap; + bool is_exec; if (radix_enabled()) { prefetch((void *)address); @@ -531,16 +532,16 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address, trap = current->thread.regs ? TRAP(current->thread.regs) : 0UL; switch (trap) { case 0x300: - access = 0UL; + is_exec = false; break; case 0x400: - access = _PAGE_EXEC; + is_exec = true; break; default: return; } - hash_preload(vma->vm_mm, address, access, trap); + hash_preload(vma->vm_mm, address, is_exec, trap); #endif /* CONFIG_PPC_STD_MMU */ #if (defined(CONFIG_PPC_BOOK3E_64) || defined(CONFIG_PPC_FSL_BOOK3E)) \ && defined(CONFIG_HUGETLB_PAGE) diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h index e5d779eed181..dd7f9b951d25 100644 --- a/arch/powerpc/mm/mmu_decl.h +++ b/arch/powerpc/mm/mmu_decl.h @@ -82,7 +82,7 @@ static inline void _tlbivax_bcast(unsigned long address, unsigned int pid, #else /* CONFIG_PPC_MMU_NOHASH */ extern void hash_preload(struct mm_struct *mm, unsigned long ea, - unsigned long access, unsigned long trap); + bool is_exec, unsigned long trap); extern void _tlbie(unsigned long address); diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 0bbc7b7d8a05..01f348938328 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -261,7 +261,7 @@ static void __init __mapin_ram_chunk(unsigned long offset, unsigned long top) map_kernel_page(v, p, ktext ? PAGE_KERNEL_TEXT : PAGE_KERNEL); #ifdef CONFIG_PPC_STD_MMU_32 if (ktext) - hash_preload(&init_mm, v, 0, 0x300); + hash_preload(&init_mm, v, false, 0x300); #endif v += PAGE_SIZE; p += PAGE_SIZE; diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c index bea6c544e38f..38a793bfca37 100644 --- a/arch/powerpc/mm/ppc_mmu_32.c +++ b/arch/powerpc/mm/ppc_mmu_32.c @@ -163,7 +163,7 @@ void __init setbat(int index, unsigned long virt, phys_addr_t phys, * Preload a translation in the hash table */ void hash_preload(struct mm_struct *mm, unsigned long ea, - unsigned long access, unsigned long trap) + bool is_exec, unsigned long trap) { pmd_t *pmd;