From mboxrd@z Thu Jan 1 00:00:00 1970 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=-7.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED 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 D8744C10F14 for ; Tue, 23 Apr 2019 14:25:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9BBC120674 for ; Tue, 23 Apr 2019 14:25:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="tcpRYFEM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728209AbfDWOZg (ORCPT ); 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Tue, 23 Apr 2019 14:25:26 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x3NEOOIK139745; Tue, 23 Apr 2019 14:25:25 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 2s0f0vh93p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 23 Apr 2019 14:25:25 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x3NEPNi7014382; Tue, 23 Apr 2019 14:25:24 GMT Received: from dhcp-burlington7-2nd-B-east-10-152-55-162.usdhcp.oraclecorp.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 23 Apr 2019 07:25:23 -0700 Subject: Re: [PATCH 3/3] xen/swiotlb: remember having called xen_create_contiguous_region() To: Juergen Gross , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org Cc: konrad.wilk@oracle.com, sstabellini@kernel.org References: <20190423105457.17502-1-jgross@suse.com> <20190423105457.17502-4-jgross@suse.com> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190423105457.17502-4-jgross@suse.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9236 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904230097 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9236 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904230097 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/23/19 6:54 AM, Juergen Gross wrote: > Instead of always calling xen_destroy_contiguous_region() in case the > memory is DMA-able for the used device, do so only in case it has been > made DMA-able via xen_create_contiguous_region() before. > > This will avoid a lot of xen_destroy_contiguous_region() calls for > 64-bit capable devices. > > As the memory in question is owned by swiotlb-xen the PG_owner_priv_1 > flag of the first allocated page can be used for remembering. I think a new enum in pageflags would be useful, and be consistent with other flag uses. -boris > > Signed-off-by: Juergen Gross > --- > drivers/xen/swiotlb-xen.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c > index 43b6e65ae256..a72f181d8e20 100644 > --- a/drivers/xen/swiotlb-xen.c > +++ b/drivers/xen/swiotlb-xen.c > @@ -321,6 +321,7 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, > xen_free_coherent_pages(hwdev, size, ret, (dma_addr_t)phys, attrs); > return NULL; > } > + SetPageOwnerPriv1(virt_to_page(ret)); > } > memset(ret, 0, size); > return ret; > @@ -344,9 +345,11 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, > /* Convert the size to actually allocated. */ > size = 1UL << (order + XEN_PAGE_SHIFT); > > - if ((dev_addr + size - 1 <= dma_mask) && > - !WARN_ON(range_straddles_page_boundary(phys, size))) > - xen_destroy_contiguous_region(phys, order); > + if (PageOwnerPriv1(virt_to_page(vaddr))) { > + if (!WARN_ON(range_straddles_page_boundary(phys, size))) > + xen_destroy_contiguous_region(phys, order); > + ClearPageOwnerPriv1(virt_to_page(vaddr)); > + } > > xen_free_coherent_pages(hwdev, size, vaddr, (dma_addr_t)phys, attrs); > } From mboxrd@z Thu Jan 1 00:00:00 1970 From: Boris Ostrovsky Subject: Re: [PATCH 3/3] xen/swiotlb: remember having called xen_create_contiguous_region() Date: Tue, 23 Apr 2019 10:31:49 -0400 Message-ID: References: <20190423105457.17502-1-jgross@suse.com> <20190423105457.17502-4-jgross@suse.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20190423105457.17502-4-jgross-IBi9RG/b67k@public.gmane.org> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Juergen Gross , xen-devel-GuqFBffKawtpuQazS67q72D2FQJk+8+b@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: sstabellini-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, konrad.wilk-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org List-Id: iommu@lists.linux-foundation.org On 4/23/19 6:54 AM, Juergen Gross wrote: > Instead of always calling xen_destroy_contiguous_region() in case the > memory is DMA-able for the used device, do so only in case it has been > made DMA-able via xen_create_contiguous_region() before. > > This will avoid a lot of xen_destroy_contiguous_region() calls for > 64-bit capable devices. > > As the memory in question is owned by swiotlb-xen the PG_owner_priv_1 > flag of the first allocated page can be used for remembering. I think a new enum in pageflags would be useful, and be consistent with other flag uses. -boris > > Signed-off-by: Juergen Gross > --- > drivers/xen/swiotlb-xen.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c > index 43b6e65ae256..a72f181d8e20 100644 > --- a/drivers/xen/swiotlb-xen.c > +++ b/drivers/xen/swiotlb-xen.c > @@ -321,6 +321,7 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, > xen_free_coherent_pages(hwdev, size, ret, (dma_addr_t)phys, attrs); > return NULL; > } > + SetPageOwnerPriv1(virt_to_page(ret)); > } > memset(ret, 0, size); > return ret; > @@ -344,9 +345,11 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, > /* Convert the size to actually allocated. */ > size = 1UL << (order + XEN_PAGE_SHIFT); > > - if ((dev_addr + size - 1 <= dma_mask) && > - !WARN_ON(range_straddles_page_boundary(phys, size))) > - xen_destroy_contiguous_region(phys, order); > + if (PageOwnerPriv1(virt_to_page(vaddr))) { > + if (!WARN_ON(range_straddles_page_boundary(phys, size))) > + xen_destroy_contiguous_region(phys, order); > + ClearPageOwnerPriv1(virt_to_page(vaddr)); > + } > > xen_free_coherent_pages(hwdev, size, vaddr, (dma_addr_t)phys, attrs); > } From mboxrd@z Thu Jan 1 00:00:00 1970 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=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED 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 976FCC10F14 for ; Tue, 23 Apr 2019 14:25:30 +0000 (UTC) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org [140.211.169.12]) (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 686B920674 for ; 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Tue, 23 Apr 2019 14:25:26 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x3NEOOIK139745; Tue, 23 Apr 2019 14:25:25 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 2s0f0vh93p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 23 Apr 2019 14:25:25 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x3NEPNi7014382; Tue, 23 Apr 2019 14:25:24 GMT Received: from dhcp-burlington7-2nd-B-east-10-152-55-162.usdhcp.oraclecorp.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 23 Apr 2019 07:25:23 -0700 Subject: Re: [PATCH 3/3] xen/swiotlb: remember having called xen_create_contiguous_region() To: Juergen Gross , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org References: <20190423105457.17502-1-jgross@suse.com> <20190423105457.17502-4-jgross@suse.com> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190423105457.17502-4-jgross@suse.com> Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9236 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904230097 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9236 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904230097 Cc: sstabellini@kernel.org, konrad.wilk@oracle.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Message-ID: <20190423143149.OSj4NOxHlTCmgDgBoVYjnCChbIaqDRQjBolsO5wkdVs@z> On 4/23/19 6:54 AM, Juergen Gross wrote: > Instead of always calling xen_destroy_contiguous_region() in case the > memory is DMA-able for the used device, do so only in case it has been > made DMA-able via xen_create_contiguous_region() before. > > This will avoid a lot of xen_destroy_contiguous_region() calls for > 64-bit capable devices. > > As the memory in question is owned by swiotlb-xen the PG_owner_priv_1 > flag of the first allocated page can be used for remembering. I think a new enum in pageflags would be useful, and be consistent with other flag uses. -boris > > Signed-off-by: Juergen Gross > --- > drivers/xen/swiotlb-xen.c | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c > index 43b6e65ae256..a72f181d8e20 100644 > --- a/drivers/xen/swiotlb-xen.c > +++ b/drivers/xen/swiotlb-xen.c > @@ -321,6 +321,7 @@ xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, > xen_free_coherent_pages(hwdev, size, ret, (dma_addr_t)phys, attrs); > return NULL; > } > + SetPageOwnerPriv1(virt_to_page(ret)); > } > memset(ret, 0, size); > return ret; > @@ -344,9 +345,11 @@ xen_swiotlb_free_coherent(struct device *hwdev, size_t size, void *vaddr, > /* Convert the size to actually allocated. */ > size = 1UL << (order + XEN_PAGE_SHIFT); > > - if ((dev_addr + size - 1 <= dma_mask) && > - !WARN_ON(range_straddles_page_boundary(phys, size))) > - xen_destroy_contiguous_region(phys, order); > + if (PageOwnerPriv1(virt_to_page(vaddr))) { > + if (!WARN_ON(range_straddles_page_boundary(phys, size))) > + xen_destroy_contiguous_region(phys, order); > + ClearPageOwnerPriv1(virt_to_page(vaddr)); > + } > > xen_free_coherent_pages(hwdev, size, vaddr, (dma_addr_t)phys, attrs); > } _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu From mboxrd@z Thu Jan 1 00:00:00 1970 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=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY 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 ACEB9C10F14 for ; Tue, 23 Apr 2019 14:25:51 +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 78CEC20674 for ; 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Tue, 23 Apr 2019 14:25:26 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.27/8.16.0.27) with SMTP id x3NEOOIK139745; Tue, 23 Apr 2019 14:25:25 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 2s0f0vh93p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 23 Apr 2019 14:25:25 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id x3NEPNi7014382; Tue, 23 Apr 2019 14:25:24 GMT Received: from dhcp-burlington7-2nd-B-east-10-152-55-162.usdhcp.oraclecorp.com (/10.152.32.65) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 23 Apr 2019 07:25:23 -0700 To: Juergen Gross , xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org References: <20190423105457.17502-1-jgross@suse.com> <20190423105457.17502-4-jgross@suse.com> From: Boris Ostrovsky Openpgp: preference=signencrypt Autocrypt: addr=boris.ostrovsky@oracle.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190423105457.17502-4-jgross@suse.com> Content-Language: en-US X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9236 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904230097 X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=9236 signatures=668685 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 priorityscore=1501 malwarescore=0 suspectscore=2 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1904230097 Subject: Re: [Xen-devel] [PATCH 3/3] xen/swiotlb: remember having called xen_create_contiguous_region() 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: sstabellini@kernel.org, konrad.wilk@oracle.com Content-Type: text/plain; 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