From patchwork Thu Sep 5 11:34:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11132845 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7343116B1 for ; Thu, 5 Sep 2019 11:42:58 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 4F2CA20825 for ; Thu, 5 Sep 2019 11:42:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="ad7SlQ2t" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4F2CA20825 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1i5q8g-0002Ev-LJ; Thu, 05 Sep 2019 11:41:22 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1i5q8e-0002Dz-Um for xen-devel@lists.xenproject.org; Thu, 05 Sep 2019 11:41:20 +0000 X-Inumbo-ID: 0d7a546e-cfd2-11e9-b299-bc764e2007e4 Received: from bombadil.infradead.org (unknown [2607:7c80:54:e::133]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 0d7a546e-cfd2-11e9-b299-bc764e2007e4; Thu, 05 Sep 2019 11:41:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=yblpSkBc51Fw0zd+3yeEyEvbp0oik6LLS+KZTp2OIZk=; b=ad7SlQ2tSsNYLM9s8LE2/Foz0u v/LFGD+KRjalx7Y10MuiNQ988TzQOl3hIx4XozEBrzxjYmvn/F2VbzhM3pMDVWI6TbTLxBo36xgT7 QEHzW60Hk0eK7KYKG1zhYsIhaCex0AlwVHL7NDSYaA2BRUkowHDht8uHFUPfrLjuAxu1cplNoPY38 2M9mFCfZeyMPZk6VCcFc5ICowlHls+EzxWBEBikvr3iAhl68RDZcdCoIdCatcmLB7H6znzhB/p5Qh a4iTYH298CEir9Fr+77qzrLexGmqWIe7WZwHL85VCrcxg6y3jAzLzuTeEWPnlPDgEpcuIfUf55H+a 4Nf9b9Kg==; Received: from [2001:4bb8:18c:1755:a4b2:9562:6bf1:4bb9] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1i5q8P-00054e-6G; Thu, 05 Sep 2019 11:41:05 +0000 From: Christoph Hellwig To: Stefano Stabellini , Konrad Rzeszutek Wilk , gross@suse.com, boris.ostrovsky@oracle.com Date: Thu, 5 Sep 2019 13:34:05 +0200 Message-Id: <20190905113408.3104-9-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190905113408.3104-1-hch@lst.de> References: <20190905113408.3104-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Subject: [Xen-devel] [PATCH 08/11] swiotlb-xen: use the same foreign page check everywhere X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-devel@lists.xenproject.org, iommu@lists.linux-foundation.org, x86@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" xen_dma_map_page uses a different and more complicated check for foreign pages than the other three cache maintainance helpers. Switch it to the simpler pfn_valid method a well, and document the scheme with a single improved comment in xen_dma_map_page. Signed-off-by: Christoph Hellwig Reviewed-by: Stefano Stabellini --- include/xen/arm/page-coherent.h | 31 +++++++++---------------------- 1 file changed, 9 insertions(+), 22 deletions(-) diff --git a/include/xen/arm/page-coherent.h b/include/xen/arm/page-coherent.h index a840d6949a87..a8d9c0678c27 100644 --- a/include/xen/arm/page-coherent.h +++ b/include/xen/arm/page-coherent.h @@ -53,23 +53,17 @@ static inline void xen_dma_map_page(struct device *hwdev, struct page *page, dma_addr_t dev_addr, unsigned long offset, size_t size, enum dma_data_direction dir, unsigned long attrs) { - unsigned long page_pfn = page_to_xen_pfn(page); - unsigned long dev_pfn = XEN_PFN_DOWN(dev_addr); - unsigned long compound_pages = - (1<