From patchwork Wed May 31 15:48:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Catalin Marinas X-Patchwork-Id: 13262491 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 E1B25C77B7A for ; Wed, 31 May 2023 15:50:31 +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:References:In-Reply-To: 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: List-Owner; bh=FYenWDLa+VwUOEdIym5Fjya30t/Niht3vZ15Q0oLKXI=; b=KQsVrh5wi2N9Ri jW3rXYaVEVLPmG80l4aGypLnYUlxJ5rRYU3cD/iii/d8cp4q9a1nNpXKCXk+aBzgT0UX+9riEEPi5 vFDkpUCsuUtgfqRRjfCSdrZ5Svbmmb7sLJ11Q2jTD+QLPOXq3IkzCJpQsHc/339WC5+aPsC50IenL 3IynPtp3vEfmxEIt93Mr7DSApPA/W/sLN5w8+DdNERjpLIA/P8prGZEkjB34HQv6DqmgfXbGXu1Q0 ooxAG7641HCAPtHFK326neT8kNr7LI+gcl+45qT9+vjnsFvn0Q0HHcyiFUxtHH7t9M07zZBfMzJY3 2lvRvZItQqmFdDLCHz7A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1q4O5M-000MMI-22; Wed, 31 May 2023 15:50:04 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1q4O5B-000MCI-0D for linux-arm-kernel@lists.infradead.org; Wed, 31 May 2023 15:49:54 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A144F6380B; Wed, 31 May 2023 15:49:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 677E6C433A0; Wed, 31 May 2023 15:49:48 +0000 (UTC) From: Catalin Marinas To: Linus Torvalds , Christoph Hellwig , Robin Murphy Cc: Arnd Bergmann , Greg Kroah-Hartman , Will Deacon , Marc Zyngier , Andrew Morton , Herbert Xu , Ard Biesheuvel , Isaac Manjarres , Saravana Kannan , Alasdair Kergon , Daniel Vetter , Joerg Roedel , Mark Brown , Mike Snitzer , "Rafael J. Wysocki" , Jonathan Cameron , linux-mm@kvack.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org Subject: [PATCH v6 17/17] arm64: Enable ARCH_WANT_KMALLOC_DMA_BOUNCE for arm64 Date: Wed, 31 May 2023 16:48:36 +0100 Message-Id: <20230531154836.1366225-18-catalin.marinas@arm.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230531154836.1366225-1-catalin.marinas@arm.com> References: <20230531154836.1366225-1-catalin.marinas@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230531_084953_141754_FAF48557 X-CRM114-Status: GOOD ( 15.98 ) 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 With the DMA bouncing of unaligned kmalloc() buffers now in place, enable it for arm64 to allow the kmalloc-{8,16,32,48,96} caches. In addition, always create the swiotlb buffer even when the end of RAM is within the 32-bit physical address range (the swiotlb buffer can still be disabled on the kernel command line). Signed-off-by: Catalin Marinas Cc: Will Deacon --- arch/arm64/Kconfig | 1 + arch/arm64/mm/init.c | 7 ++++++- 2 files changed, 7 insertions(+), 1 deletion(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b1201d25a8a4..af42871431c0 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -120,6 +120,7 @@ config ARM64 select CRC32 select DCACHE_WORD_ACCESS select DYNAMIC_FTRACE if FUNCTION_TRACER + select DMA_BOUNCE_UNALIGNED_KMALLOC select DMA_DIRECT_REMAP select EDAC_SUPPORT select FRAME_POINTER diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c index 66e70ca47680..3ac2e9d79ce4 100644 --- a/arch/arm64/mm/init.c +++ b/arch/arm64/mm/init.c @@ -442,7 +442,12 @@ void __init bootmem_init(void) */ void __init mem_init(void) { - swiotlb_init(max_pfn > PFN_DOWN(arm64_dma_phys_limit), SWIOTLB_VERBOSE); + bool swiotlb = max_pfn > PFN_DOWN(arm64_dma_phys_limit); + + if (IS_ENABLED(CONFIG_DMA_BOUNCE_UNALIGNED_KMALLOC)) + swiotlb = true; + + swiotlb_init(swiotlb, SWIOTLB_VERBOSE); /* this will put all unused low memory onto the freelists */ memblock_free_all();