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=-8.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_RED 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 7CFCEC433DB for ; Tue, 19 Jan 2021 11:16:31 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) (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 1EA182063A for ; Tue, 19 Jan 2021 11:16:30 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1EA182063A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 83CF986742; Tue, 19 Jan 2021 11:16:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id B09jrPk5PQxr; Tue, 19 Jan 2021 11:16:30 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by whitealder.osuosl.org (Postfix) with ESMTP id 2A78B866F1; Tue, 19 Jan 2021 11:16:30 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 14435C088B; Tue, 19 Jan 2021 11:16:30 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id 8F898C013A for ; Tue, 19 Jan 2021 11:16:28 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id 7D637866F1 for ; Tue, 19 Jan 2021 11:16:28 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from whitealder.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id d+drWVfwvauF for ; Tue, 19 Jan 2021 11:16:28 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by whitealder.osuosl.org (Postfix) with ESMTPS id C29B6860A3 for ; Tue, 19 Jan 2021 11:16:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1611054986; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc; bh=prchNfDbXNCFUPpFnz6BKtCHGpSZan3ogM0IdWmrA6A=; b=U465nRgB4u4OU/aHNvwOPLgZQbJyUnArxWy83Znlx49RrV2xhkqBcVAcR6WFZE1lscT4BM inSa2CbGgR9HTt0SkDQhtsHO0SqTaIhIL4Ko1MDUjspVZK1GgfYk/y+11D7KO9X/q6PaFI FD7YCE5M1PPfceUl0jVlt7H4sRfMImw= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-438-XNmkh8scP7mYNZInh_xJjA-1; Tue, 19 Jan 2021 06:16:24 -0500 X-MC-Unique: XNmkh8scP7mYNZInh_xJjA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 70610802B45; Tue, 19 Jan 2021 11:16:23 +0000 (UTC) Received: from localhost.localdomain.com (ovpn-12-117.pek2.redhat.com [10.72.12.117]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9ED0D36FA; Tue, 19 Jan 2021 11:16:19 +0000 (UTC) From: Lianbo Jiang To: linux-kernel@vger.kernel.org Subject: [PATCH 0/2 v2] iommu: fix the failure of deferred attach for iommu attach device Date: Tue, 19 Jan 2021 19:16:14 +0800 Message-Id: <20210119111616.12761-1-lijiang@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Cc: thomas.lendacky@amd.com, will@kernel.org, iommu@lists.linux-foundation.org, robin.murphy@arm.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" This patchset is to fix the failure of deferred attach for iommu attach device, it includes the following two patches: [1] [PATCH 1/2] dma-iommu: use static-key to minimize the impact in the fast-path This is a prepared patch for the second one, move out the is_kdump_kernel() check from iommu_dma_deferred_attach() to iommu_dma_init(), and use the static-key in the fast-path to minimize the impact in the normal case. [2] [PATCH 2/2] iommu: use the __iommu_attach_device() directly for deferred attach Move the handling currently in iommu_dma_deferred_attach() into the iommu core code so that it can call the __iommu_attach_device() directly instead of the iommu_attach_device(). The external interface iommu_attach_device() is not suitable for handling this situation. Changes since v1: [1] use the __iommu_attach_device() directly for deferred attach [2] use static-key to minimize the impact in the fast-path Lianbo Jiang (2): dma-iommu: use static-key to minimize the impact in the fast-path iommu: use the __iommu_attach_device() directly for deferred attach drivers/iommu/dma-iommu.c | 29 +++++++++++------------------ drivers/iommu/iommu.c | 12 ++++++++++++ include/linux/iommu.h | 2 ++ 3 files changed, 25 insertions(+), 18 deletions(-) -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu