From patchwork Tue Sep 15 15:41:10 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 7187561 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 369C4BEEC1 for ; Tue, 15 Sep 2015 15:48:56 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 128362054E for ; Tue, 15 Sep 2015 15:48:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D0472204D9 for ; Tue, 15 Sep 2015 15:48:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754567AbbIOPsY (ORCPT ); Tue, 15 Sep 2015 11:48:24 -0400 Received: from eu-smtp-delivery-143.mimecast.com ([146.101.78.143]:50895 "EHLO eu-smtp-delivery-143.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752789AbbIOPlm (ORCPT ); Tue, 15 Sep 2015 11:41:42 -0400 Received: from cam-owa2.Emea.Arm.com (fw-tnat.cambridge.arm.com [217.140.96.140]) by eu-smtp-1.mimecast.com with ESMTP id uk-mta-33-FA4bm4m_QBeSbm7D8T6QoQ-1; Tue, 15 Sep 2015 16:41:40 +0100 Received: from e106634-lin.cambridge.arm.com ([10.1.2.79]) by cam-owa2.Emea.Arm.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 15 Sep 2015 16:41:39 +0100 From: "Suzuki K. Poulose" To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Catalin.Marinas@arm.com, Will.Deacon@arm.com, Mark.Rutland@arm.com, Marc.Zyngier@arm.com, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, ard.biesheuvel@linaro.org, suzuki.poulose@arm.com, Mark Rutland , Catalin Marinas , Will Deacon Subject: [PATCH 01/15] arm64: Move swapper pagetable definitions Date: Tue, 15 Sep 2015 16:41:10 +0100 Message-Id: <1442331684-28818-2-git-send-email-suzuki.poulose@arm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1442331684-28818-1-git-send-email-suzuki.poulose@arm.com> References: <1442331684-28818-1-git-send-email-suzuki.poulose@arm.com> X-OriginalArrivalTime: 15 Sep 2015 15:41:39.0984 (UTC) FILETIME=[0380A100:01D0EFCD] X-MC-Unique: FA4bm4m_QBeSbm7D8T6QoQ-1 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: "Suzuki K. Poulose" Move the kernel pagetable (both swapper and idmap) definitions from the generic asm/page.h to a new file, asm/kernel-pgtable.h. This is mostly a cosmetic change, to clean up the asm/page.h to get rid of the arch specific details which are not needed by the generic code. Also renames the symbols to prevent conflicts. e.g, BLOCK_SHIFT => SWAPPER_BLOCK_SHIFT Cc: Ard Biesheuvel Cc: Mark Rutland Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Suzuki K. Poulose Reviewed-by: Ard Biesheuvel Tested-by: Ard Biesheuvel --- arch/arm64/include/asm/kernel-pgtable.h | 65 +++++++++++++++++++++++++++++++ arch/arm64/include/asm/page.h | 18 --------- arch/arm64/kernel/head.S | 37 ++++-------------- arch/arm64/kernel/vmlinux.lds.S | 1 + 4 files changed, 74 insertions(+), 47 deletions(-) create mode 100644 arch/arm64/include/asm/kernel-pgtable.h diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h new file mode 100644 index 0000000..622929d --- /dev/null +++ b/arch/arm64/include/asm/kernel-pgtable.h @@ -0,0 +1,65 @@ +/* + * asm/kernel-pgtable.h : Kernel page table mapping + * + * Copyright (C) 2015 ARM Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +#ifndef __ASM_KERNEL_PGTABLE_H +#define __ASM_KERNEL_PGTABLE_H + +/* + * The idmap and swapper page tables need some space reserved in the kernel + * image. Both require pgd, pud (4 levels only) and pmd tables to (section) + * map the kernel. With the 64K page configuration, swapper and idmap need to + * map to pte level. The swapper also maps the FDT (see __create_page_tables + * for more information). Note that the number of ID map translation levels + * could be increased on the fly if system RAM is out of reach for the default + * VA range, so 3 pages are reserved in all cases. + */ +#ifdef CONFIG_ARM64_64K_PAGES +#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS) +#else +#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1) +#endif + +#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) +#define IDMAP_DIR_SIZE (3 * PAGE_SIZE) + +/* Initial memory map size */ +#ifdef CONFIG_ARM64_64K_PAGES +#define SWAPPER_BLOCK_SHIFT PAGE_SHIFT +#define SWAPPER_BLOCK_SIZE PAGE_SIZE +#define SWAPPER_TABLE_SHIFT PMD_SHIFT +#else +#define SWAPPER_BLOCK_SHIFT SECTION_SHIFT +#define SWAPPER_BLOCK_SIZE SECTION_SIZE +#define SWAPPER_TABLE_SHIFT PUD_SHIFT +#endif + + +/* + * Initial memory map attributes. + */ +#define SWAPPER_PTE_FLAGS PTE_TYPE_PAGE | PTE_AF | PTE_SHARED +#define SWAPPER_PMD_FLAGS PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S + +#ifdef CONFIG_ARM64_64K_PAGES +#define SWAPPER_MM_MMUFLAGS PTE_ATTRINDX(MT_NORMAL) | SWAPPER_PTE_FLAGS +#else +#define SWAPPER_MM_MMUFLAGS PMD_ATTRINDX(MT_NORMAL) | SWAPPER_PMD_FLAGS +#endif + + +#endif diff --git a/arch/arm64/include/asm/page.h b/arch/arm64/include/asm/page.h index 7d9c7e4..3c9ce8c 100644 --- a/arch/arm64/include/asm/page.h +++ b/arch/arm64/include/asm/page.h @@ -28,24 +28,6 @@ #define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT) #define PAGE_MASK (~(PAGE_SIZE-1)) -/* - * The idmap and swapper page tables need some space reserved in the kernel - * image. Both require pgd, pud (4 levels only) and pmd tables to (section) - * map the kernel. With the 64K page configuration, swapper and idmap need to - * map to pte level. The swapper also maps the FDT (see __create_page_tables - * for more information). Note that the number of ID map translation levels - * could be increased on the fly if system RAM is out of reach for the default - * VA range, so 3 pages are reserved in all cases. - */ -#ifdef CONFIG_ARM64_64K_PAGES -#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS) -#else -#define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1) -#endif - -#define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) -#define IDMAP_DIR_SIZE (3 * PAGE_SIZE) - #ifndef __ASSEMBLY__ #include diff --git a/arch/arm64/kernel/head.S b/arch/arm64/kernel/head.S index a055be6..46670bf 100644 --- a/arch/arm64/kernel/head.S +++ b/arch/arm64/kernel/head.S @@ -29,6 +29,7 @@ #include #include #include +#include #include #include #include @@ -46,32 +47,10 @@ #error TEXT_OFFSET must be less than 2MB #endif -#ifdef CONFIG_ARM64_64K_PAGES -#define BLOCK_SHIFT PAGE_SHIFT -#define BLOCK_SIZE PAGE_SIZE -#define TABLE_SHIFT PMD_SHIFT -#else -#define BLOCK_SHIFT SECTION_SHIFT -#define BLOCK_SIZE SECTION_SIZE -#define TABLE_SHIFT PUD_SHIFT -#endif - #define KERNEL_START _text #define KERNEL_END _end /* - * Initial memory map attributes. - */ -#define PTE_FLAGS PTE_TYPE_PAGE | PTE_AF | PTE_SHARED -#define PMD_FLAGS PMD_TYPE_SECT | PMD_SECT_AF | PMD_SECT_S - -#ifdef CONFIG_ARM64_64K_PAGES -#define MM_MMUFLAGS PTE_ATTRINDX(MT_NORMAL) | PTE_FLAGS -#else -#define MM_MMUFLAGS PMD_ATTRINDX(MT_NORMAL) | PMD_FLAGS -#endif - -/* * Kernel startup entry point. * --------------------------- * @@ -293,7 +272,7 @@ ENDPROC(preserve_boot_args) .macro create_pgd_entry, tbl, virt, tmp1, tmp2 create_table_entry \tbl, \virt, PGDIR_SHIFT, PTRS_PER_PGD, \tmp1, \tmp2 #if SWAPPER_PGTABLE_LEVELS == 3 - create_table_entry \tbl, \virt, TABLE_SHIFT, PTRS_PER_PTE, \tmp1, \tmp2 + create_table_entry \tbl, \virt, SWAPPER_TABLE_SHIFT, PTRS_PER_PTE, \tmp1, \tmp2 #endif .endm @@ -305,15 +284,15 @@ ENDPROC(preserve_boot_args) * Corrupts: phys, start, end, pstate */ .macro create_block_map, tbl, flags, phys, start, end - lsr \phys, \phys, #BLOCK_SHIFT - lsr \start, \start, #BLOCK_SHIFT + lsr \phys, \phys, #SWAPPER_BLOCK_SHIFT + lsr \start, \start, #SWAPPER_BLOCK_SHIFT and \start, \start, #PTRS_PER_PTE - 1 // table index - orr \phys, \flags, \phys, lsl #BLOCK_SHIFT // table entry - lsr \end, \end, #BLOCK_SHIFT + orr \phys, \flags, \phys, lsl #SWAPPER_BLOCK_SHIFT // table entry + lsr \end, \end, #SWAPPER_BLOCK_SHIFT and \end, \end, #PTRS_PER_PTE - 1 // table end index 9999: str \phys, [\tbl, \start, lsl #3] // store the entry add \start, \start, #1 // next entry - add \phys, \phys, #BLOCK_SIZE // next block + add \phys, \phys, #SWAPPER_BLOCK_SIZE // next block cmp \start, \end b.ls 9999b .endm @@ -350,7 +329,7 @@ __create_page_tables: cmp x0, x6 b.lo 1b - ldr x7, =MM_MMUFLAGS + ldr x7, =SWAPPER_MM_MMUFLAGS /* * Create the identity mapping. diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 9807333..8a5d97b 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -5,6 +5,7 @@ */ #include +#include #include #include #include