From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754461AbbIOPq7 (ORCPT ); Tue, 15 Sep 2015 11:46:59 -0400 Received: from eu-smtp-delivery-143.mimecast.com ([146.101.78.143]:8897 "EHLO eu-smtp-delivery-143.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753372AbbIOPlo (ORCPT ); Tue, 15 Sep 2015 11:41:44 -0400 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 04/15] arm64: Calculate size for idmap_pg_dir at compile time Date: Tue, 15 Sep 2015 16:41:13 +0100 Message-Id: <1442331684-28818-5-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 15:41:40.0437 (UTC) FILETIME=[03C5C050:01D0EFCD] X-MC-Unique: pzn2_okCTEuEiTHp6lvBdw-3 Content-Type: text/plain; charset=WINDOWS-1252 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by mail.home.local id t8FFl42j028008 From: "Suzuki K. Poulose" Now that we can calculate the number of levels required for mapping a va width, reserve exact number of pages that would be required to cover the idmap. The idmap should be able to handle the maximum physical address size supported. 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/boot.h | 1 + arch/arm64/include/asm/kernel-pgtable.h | 7 +++++-- 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/boot.h b/arch/arm64/include/asm/boot.h index 81151b6..678b63e 100644 --- a/arch/arm64/include/asm/boot.h +++ b/arch/arm64/include/asm/boot.h @@ -2,6 +2,7 @@ #ifndef __ASM_BOOT_H #define __ASM_BOOT_H +#include #include /* diff --git a/arch/arm64/include/asm/kernel-pgtable.h b/arch/arm64/include/asm/kernel-pgtable.h index 5876a36..def7168 100644 --- a/arch/arm64/include/asm/kernel-pgtable.h +++ b/arch/arm64/include/asm/kernel-pgtable.h @@ -33,16 +33,19 @@ * 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. + * VA range, so pages required to map highest possible PA are reserved in all + * cases. */ #if ARM64_SWAPPER_USES_SECTION_MAPS #define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS - 1) +#define IDMAP_PGTABLE_LEVELS (ARM64_HW_PGTABLE_LEVELS(PHYS_MASK_SHIFT) - 1) #else #define SWAPPER_PGTABLE_LEVELS (CONFIG_PGTABLE_LEVELS) +#define IDMAP_PGTABLE_LEVELS (ARM64_HW_PGTABLE_LEVELS(PHYS_MASK_SHIFT)) #endif #define SWAPPER_DIR_SIZE (SWAPPER_PGTABLE_LEVELS * PAGE_SIZE) -#define IDMAP_DIR_SIZE (3 * PAGE_SIZE) +#define IDMAP_DIR_SIZE (IDMAP_PGTABLE_LEVELS * PAGE_SIZE) /* Initial memory map size */ #if ARM64_SWAPPER_USES_SECTION_MAPS -- 1.7.9.5