From patchwork Wed Feb 26 16:57:35 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ard Biesheuvel X-Patchwork-Id: 206518 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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 87462C4BA1E for ; Wed, 26 Feb 2020 16:57:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 560FA2467F for ; Wed, 26 Feb 2020 16:57:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582736272; bh=4sZ0PYKHHFjGjhnZonEyKKQjDJ4zZiNH+ld8nAMN3p8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Teb372ahdJjlkjtZtzF5irSiTiEARjPTIwxl5BvNSzXVfEj06Hobo2TFFxIbeQq1I m/gKYQQncIMTU++q8dFD/xFDlihYT1F90VrFNX8pJeZrjlSZhGQ46t5cmQVEO8koG4 FU4zzBx2mThMFCbqDZUTA2av3tPW06Qr6YZ2Xznk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726980AbgBZQ5v (ORCPT ); Wed, 26 Feb 2020 11:57:51 -0500 Received: from mail.kernel.org ([198.145.29.99]:36018 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727196AbgBZQ5v (ORCPT ); Wed, 26 Feb 2020 11:57:51 -0500 Received: from e123331-lin.home (amontpellier-657-1-18-247.w109-210.abo.wanadoo.fr [109.210.65.247]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9ABAC24685; Wed, 26 Feb 2020 16:57:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582736271; bh=4sZ0PYKHHFjGjhnZonEyKKQjDJ4zZiNH+ld8nAMN3p8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DphzF4w0Z/g9FSxYW5EdUOqsxTMzE2r8wM54G6dRwsw6KYWEM3IZwKHj4qzJ7b7gj Zoxsq2/R7kQmdxL2zccS5QnMx0FhVrctUJ6jOedvRzfUewBJ7vD1Jj1Smiic6GEt0X p038Izktdh2UBBQPKiZ41O/FPAfsN25Bq9YIju/Y= From: Ard Biesheuvel To: linux-arm-kernel@lists.infradead.org Cc: linux-efi@vger.kernel.org, Ard Biesheuvel , Russell King , Marc Zyngier , Nicolas Pitre , Catalin Marinas , Tony Lindgren , Linus Walleij Subject: [PATCH v4 2/5] efi/arm: Pass start and end addresses to cache_clean_flush() Date: Wed, 26 Feb 2020 17:57:35 +0100 Message-Id: <20200226165738.11201-3-ardb@kernel.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200226165738.11201-1-ardb@kernel.org> References: <20200226165738.11201-1-ardb@kernel.org> Sender: linux-efi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-efi@vger.kernel.org In preparation for turning the decompressor's cache clean/flush operations into proper by-VA maintenance for v7 cores, pass the start and end addresses of the regions that need cache maintenance into cache_clean_flush in registers r0 and r1. Currently, all implementations of cache_clean_flush ignore these values, so no functional change is expected as a result of this patch. Signed-off-by: Ard Biesheuvel --- arch/arm/boot/compressed/head.S | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 39f7071d47c7..8487221bedb0 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -1460,6 +1460,12 @@ ENTRY(efi_stub_entry) @ Preserve return value of efi_entry() in r4 mov r4, r0 + add r1, r4, #SZ_2M @ DT end + bl cache_clean_flush + + ldr r0, [sp] @ relocated zImage + ldr r1, =_edata @ size of zImage + add r1, r1, r0 @ end of zImage bl cache_clean_flush @ The PE/COFF loader might not have cleaned the code we are