From patchwork Thu Oct 29 22:18:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Gleixner X-Patchwork-Id: 11867847 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=-6.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 9D125C2D0A3 for ; Thu, 29 Oct 2020 22:53:17 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 17A6820639 for ; Thu, 29 Oct 2020 22:53:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dVpDKYmP"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="IvYjOvka"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="UmrmyK4O"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="HxpVD2rY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 17A6820639 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:Subject:To:From:Date: Message-Id:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:List-Owner; bh=HS3iyzJgSCPH7ae1mjbfWjY81ilvZ/DCCGfvZZQHO9M=; b=dVpDKYmPMqzz4tHWqO49gL09x QVTTPHgjVavSntLy+SAxsyaxoUWUwVN7tHVuSvka0u8/irF7n6coMhpeNVmxlTkar9p98CwQuriWf TOpmdQbKyzjFQvnkbd3TRr22MqFNOrdf3Dm16WofcWwGjcj1oymmr7NVPAv5g0MG9oGbRcv3ampwL pAJGPd4ymmVYphKQwav9E5XyszGJX255vC1c4SaXD4xsGC4GtKbpyRKKNvr8v2MKgG0MEYvIz6OlX iYkMC9cH5xlRcIT6wFplPens6UeHoHmV1dJWGoUqUlM1oP2ONIdN3icmJG5y/imdSP6VnJ6XjHWa/ gohCnVTGQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYGmV-0001G5-1W; Thu, 29 Oct 2020 22:52:31 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYGlo-0000zC-FX; Thu, 29 Oct 2020 22:51:48 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-transfer-encoding:Content-Type: MIME-Version:References:Subject:Cc:To:From:Date:Message-Id:Sender:Reply-To: Content-ID:Content-Description:In-Reply-To; bh=mKqToMCt4TK857L6pxHu/gEBeaTgg/I0tChqKCuxQX4=; b=IvYjOvkaYb1XIRiCN/yOwX7X4i LffOMMZgO4nTr7XIT43VNOv0iWPKajjTFhh76T3ZYHVMGaVmTPKnDJ6yZgYN446qOsWugAA3ReFil hXo8gvUHic5SGiPGzFh4mHzi4+GAiSoQAwW4CN6N8mW2GPX5ICuhq/Jp7ZH9sIdQ2uS7RrVvJUyFx ubuQSImoiXOLCL7f7/mmbZDZrVICXivt1AkRPMuJx5GGD7ESbPFIAEWmIxwlMRNCrbMedrFyIVVA0 Y3GNqXi6zU6xgT/1F0HCKyNz6iVPojF4hwzxL0wgG/tnVBPZWqXb1LLT83Dhw2PrAzM+yFYj9TzEZ JBMqGk2w==; Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by casper.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kYGT4-0003GB-4u; Thu, 29 Oct 2020 22:32:30 +0000 Message-Id: <20201029222651.695446198@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1604010742; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=mKqToMCt4TK857L6pxHu/gEBeaTgg/I0tChqKCuxQX4=; b=UmrmyK4OiYktirQTA7UPVpOuNJymPsdcFHoBTqnXV9fJJb1k9GhyerYmkkw6v1FwOK7Lkz 4x4mNiTbwKg5XZwyKoq/Fq/JZ9UZ0JmihPnq0kgM/l9myx6jlrloa9+qlrvH0E2IILOMmC azN6aJk3sfuSUjUjr2/AsPYOwAqbXnNKjPh5PdAvsV4A4C05v8RCUhZuD0Ntmlxx3ysFgQ BZrlbNRbVJFUI5O0NQLP/p+jcklvUVwb+VDp4aa3GQ3POyZoXr7nIQg1P3mWQ/HIXLu6jH COkPfToQ9Rvl0nOPi0H1A0kcb8D8omgt9o+h745K16paCYz0CD3yjsB+QlfWaQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1604010742; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=mKqToMCt4TK857L6pxHu/gEBeaTgg/I0tChqKCuxQX4=; b=HxpVD2rY7MqmhvHwPuXswIG/rzdtissHt/T3LPe1/rTXCiyfxOrWzI7fQMiVzATIzNobbU 5pcryDtXkN5Hm+Dg== Date: Thu, 29 Oct 2020 23:18:17 +0100 From: Thomas Gleixner To: LKML Subject: [patch V2 11/18] powerpc/mm/highmem: Switch to generic kmap atomic References: <20201029221806.189523375@linutronix.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201029_223226_782186_7013A8C5 X-CRM114-Status: GOOD ( 16.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Juri Lelli , linux-xtensa@linux-xtensa.org, Peter Zijlstra , Benjamin Herrenschmidt , Sebastian Andrzej Siewior , Ben Segall , linux-mm@kvack.org, Paul Mackerras , sparclinux@vger.kernel.org, Vincent Chen , Ingo Molnar , linux-arch@vger.kernel.org, Vincent Guittot , Herbert Xu , Michael Ellerman , x86@kernel.org, Russell King , linux-csky@vger.kernel.org, Christoph Hellwig , David Airlie , Mel Gorman , linux-snps-arc@lists.infradead.org, Ard Biesheuvel , Paul McKenney , Steven Rostedt , Linus Torvalds , Greentime Hu , Dietmar Eggemann , linux-arm-kernel@lists.infradead.org, Chris Zankel , Michal Simek , Thomas Bogendoerfer , Nick Hu , Max Filippov , linuxppc-dev@lists.ozlabs.org, linux-mips@vger.kernel.org, Arnd Bergmann , Daniel Vetter , Vineet Gupta , Guo Ren , Andrew Morton , Daniel Bristot de Oliveira , "David S. Miller" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org No reason having the same code in every architecture Signed-off-by: Thomas Gleixner Cc: Michael Ellerman Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/Kconfig | 1 arch/powerpc/include/asm/highmem.h | 6 ++- arch/powerpc/mm/Makefile | 1 arch/powerpc/mm/highmem.c | 67 ------------------------------------- arch/powerpc/mm/mem.c | 7 --- 5 files changed, 6 insertions(+), 76 deletions(-) --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -409,6 +409,7 @@ menu "Kernel options" config HIGHMEM bool "High memory support" depends on PPC32 + select KMAP_LOCAL source "kernel/Kconfig.hz" --- a/arch/powerpc/include/asm/highmem.h +++ b/arch/powerpc/include/asm/highmem.h @@ -29,7 +29,6 @@ #include #include -extern pte_t *kmap_pte; extern pte_t *pkmap_page_table; /* @@ -60,6 +59,11 @@ extern pte_t *pkmap_page_table; #define flush_cache_kmaps() flush_cache_all() +#define arch_kmap_local_post_map(vaddr, pteval) \ + local_flush_tlb_page(NULL, vaddr) +#define arch_kmap_local_post_unmap(vaddr) \ + local_flush_tlb_page(NULL, vaddr) + #endif /* __KERNEL__ */ #endif /* _ASM_HIGHMEM_H */ --- a/arch/powerpc/mm/Makefile +++ b/arch/powerpc/mm/Makefile @@ -16,7 +16,6 @@ obj-$(CONFIG_NEED_MULTIPLE_NODES) += num obj-$(CONFIG_PPC_MM_SLICES) += slice.o obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o -obj-$(CONFIG_HIGHMEM) += highmem.o obj-$(CONFIG_PPC_COPRO_BASE) += copro_fault.o obj-$(CONFIG_PPC_PTDUMP) += ptdump/ obj-$(CONFIG_KASAN) += kasan/ --- a/arch/powerpc/mm/highmem.c +++ /dev/null @@ -1,67 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * highmem.c: virtual kernel memory mappings for high memory - * - * PowerPC version, stolen from the i386 version. - * - * Used in CONFIG_HIGHMEM systems for memory pages which - * are not addressable by direct kernel virtual addresses. - * - * Copyright (C) 1999 Gerhard Wichert, Siemens AG - * Gerhard.Wichert@pdb.siemens.de - * - * - * Redesigned the x86 32-bit VM architecture to deal with - * up to 16 Terrabyte physical memory. With current x86 CPUs - * we now support up to 64 Gigabytes physical RAM. - * - * Copyright (C) 1999 Ingo Molnar - * - * Reworked for PowerPC by various contributors. Moved from - * highmem.h by Benjamin Herrenschmidt (c) 2009 IBM Corp. - */ - -#include -#include - -void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) -{ - unsigned long vaddr; - int idx, type; - - type = kmap_atomic_idx_push(); - idx = type + KM_TYPE_NR*smp_processor_id(); - vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); - WARN_ON(IS_ENABLED(CONFIG_DEBUG_HIGHMEM) && !pte_none(*(kmap_pte - idx))); - __set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot), 1); - local_flush_tlb_page(NULL, vaddr); - - return (void*) vaddr; -} -EXPORT_SYMBOL(kmap_atomic_high_prot); - -void kunmap_atomic_high(void *kvaddr) -{ - unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - - if (vaddr < __fix_to_virt(FIX_KMAP_END)) - return; - - if (IS_ENABLED(CONFIG_DEBUG_HIGHMEM)) { - int type = kmap_atomic_idx(); - unsigned int idx; - - idx = type + KM_TYPE_NR * smp_processor_id(); - WARN_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); - - /* - * force other mappings to Oops if they'll try to access - * this pte without first remap it - */ - pte_clear(&init_mm, vaddr, kmap_pte-idx); - local_flush_tlb_page(NULL, vaddr); - } - - kmap_atomic_idx_pop(); -} -EXPORT_SYMBOL(kunmap_atomic_high); --- a/arch/powerpc/mm/mem.c +++ b/arch/powerpc/mm/mem.c @@ -61,11 +61,6 @@ unsigned long long memory_limit; bool init_mem_is_free; -#ifdef CONFIG_HIGHMEM -pte_t *kmap_pte; -EXPORT_SYMBOL(kmap_pte); -#endif - pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, pgprot_t vma_prot) { @@ -235,8 +230,6 @@ void __init paging_init(void) map_kernel_page(PKMAP_BASE, 0, __pgprot(0)); /* XXX gross */ pkmap_page_table = virt_to_kpte(PKMAP_BASE); - - kmap_pte = virt_to_kpte(__fix_to_virt(FIX_KMAP_BEGIN)); #endif /* CONFIG_HIGHMEM */ printk(KERN_DEBUG "Top of RAM: 0x%llx, Total RAM: 0x%llx\n",