From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752030AbdAaNFk (ORCPT ); Tue, 31 Jan 2017 08:05:40 -0500 Received: from mail-pf0-f195.google.com ([209.85.192.195]:32923 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751882AbdAaNFc (ORCPT ); Tue, 31 Jan 2017 08:05:32 -0500 From: afzal mohammed To: Russell King - ARM Linux Cc: Vladimir Murzin , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, afzal mohammed Subject: [PATCH v3 0/3] ARM: !MMU: v7-A support, dynamic vectors base handling Date: Tue, 31 Jan 2017 18:34:46 +0530 Message-Id: <20170131130446.5829-1-afzal.mohd.ma@gmail.com> X-Mailer: git-send-email 2.11.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, ARM core changes to support !MMU Kernel on v7-A MMU processors. Based on the feedback from Russell, it was decided to handle vector base dynamically in C for no-MMU & work towards the the goal of removing VECTORS_BASE from Kconfig. Exception base address is dynamically found out in C & configured. This series also does the preparation for CONFIG_VECTORS_BASE removal. Once vector region setup, used by Cortex-R, is made devoid of VECTORS_BASE, it can be removed from Kconfig. [2] already decouples it from Kconfig for MMU. Vladimir's Tested-by on v2 has been removed from [PATCH 2/3] as it has been changed. And as it doesn't affect functionality, Tested-by has been retained on the other two patches, Vladimir, let me know if not okay. This series has been verified over current mainline plus [1,2] on 1. Vybrid Cosmic+ a. Cortex-M4 - !MMU Kernel b. Cortex-A5 - MMU Kernel. This series also has been verified over Vladimir's series [3] along with [1,2] on 1. Vybrid Cosmic+ a. Cortex-M4 !MMU Kernel b. Cortex-A5 MMU Kernel c. Cortex-A5 !MMU Kernel 2. AM437x IDK a. Cortex-A9 MMU Kernel b. Cortex-A9 !MMU Kernel Regards afzal v3: => Removed [PATCH 1/4] of v2 as it is in -next => Simplify by defining VECTORS_BASE to variable holding dynamically calculated exception base address v2: => Fix bisectability issue on !MMU builds => UL suffix on VECTORS_BASE definition => Use existing helpers to detect security extensions => Rewrite a CPP step to C for readability [1] "[PATCH 1/2] ARM: nommu: allow enabling REMAP_VECTORS_TO_RAM" http://lists.infradead.org/pipermail/linux-arm-kernel/2016-December/473593.html (in -next) [2] "[PATCH v2 1/4] ARM: mmu: decouple VECTORS_BASE from Kconfig" http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/481904.html (in -next) [3] "[RFC v2 PATCH 00/23] Allow NOMMU for MULTIPLATFORM", http://lists.infradead.org/pipermail/linux-arm-kernel/2016-November/470966.html (git://linux-arm.org/linux-vm.git nommu-rfc-v2) afzal mohammed (3): ARM: nommu: dynamic exception base address setting ARM: nommu: display vectors base ARM: nommu: remove Hivecs configuration is asm arch/arm/include/asm/memory.h | 9 ++++++-- arch/arm/kernel/head-nommu.S | 5 ----- arch/arm/mm/nommu.c | 52 +++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 57 insertions(+), 9 deletions(-) -- 2.11.0