From patchwork Fri Apr 29 10:32:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kefeng Wang X-Patchwork-Id: 12831773 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 492D5C433EF for ; Fri, 29 Apr 2022 10:29:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=+yKENhhuB+IGr/AqS763i3gqk0cQDBt61tEJS7TwZgg=; b=DcT5vNv2oyTmt6 JUISLCm+TqDEkZ3xMqZ/YQqqd0PNOEiW9UuU/UbEVC5ltx3Mg0BVVucZ5BJO+MkwfkMxop1Lt7Wrn dlWbEqvBO4bHYT23iNf/RlkRnp/lgypyWvFkOD8b+rnuUeICJA5R5mqxpMeMdeBR4qwAPppY5hp3j RPypPcSKUSOkqyl4EMjhmZtDlFWEY1MEH4MpzJyLTDWLO/ezv8qdPFUhNpi/yMJKH2KhdlLPcZ6fB oJt6imeKlsmerOM/ATh11mynkUvxAN3rKH5CEbJl034KtEf+DYMuroQxDa85aDlQXSxwUp0hFBhFm 79EgSIfYsX2hlBR160Mg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nkNre-00AnXE-0o; Fri, 29 Apr 2022 10:28:42 +0000 Received: from szxga01-in.huawei.com ([45.249.212.187]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nkNko-00AkAD-Tw for linux-arm-kernel@lists.infradead.org; Fri, 29 Apr 2022 10:21:42 +0000 Received: from dggpemm500020.china.huawei.com (unknown [172.30.72.56]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KqT6M1sDszhYp8; Fri, 29 Apr 2022 18:21:15 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggpemm500020.china.huawei.com (7.185.36.49) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 29 Apr 2022 18:21:30 +0800 Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500001.china.huawei.com (7.185.36.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Fri, 29 Apr 2022 18:21:30 +0800 From: Kefeng Wang To: , , , , CC: , , , Kefeng Wang Subject: [PATCH v2 0/5] arm64: Cleanup ioremap() and support ioremap_prot() Date: Fri, 29 Apr 2022 18:32:20 +0800 Message-ID: <20220429103225.75121-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220429_032139_188652_5C7BBAEE X-CRM114-Status: UNSURE ( 8.16 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 1. Enhance generic ioremap to make it more useful. 2. Let's arm64 use GENERIC_IOREMAP to cleanup code. 3. Support HAVE_IOREMAP_PROT on arm64, which enable generic_access_phys(), it is useful when debug(eg, gdb) via access_process_vm device memory infrastructure. v2: - s/addr/phys_addr in ioremap_prot, suggested by Andrew Morton - rename arch_ioremap/iounmap_check to arch_ioremap/iounmad and change return value, per Christoph Hellwig and Andrew Morton - and use 'ifndef arch_ioremap' instead of weak function, per Arnd Bergmann - collect ack/review Kefeng Wang (5): mm: ioremap: Use more sensibly name in ioremap_prot() mm: ioremap: Setup phys_addr of struct vm_struct mm: ioremap: Add arch_ioremap/iounmap() arm64: mm: Convert to GENERIC_IOREMAP arm64: Add HAVE_IOREMAP_PROT support .../features/vm/ioremap_prot/arch-support.txt | 2 +- arch/arm64/Kconfig | 2 + arch/arm64/include/asm/io.h | 20 +++-- arch/arm64/include/asm/pgtable.h | 10 +++ arch/arm64/kernel/acpi.c | 2 +- arch/arm64/mm/hugetlbpage.c | 10 --- arch/arm64/mm/ioremap.c | 85 +++---------------- include/asm-generic/io.h | 16 +++- mm/ioremap.c | 27 ++++-- 9 files changed, 74 insertions(+), 100 deletions(-)