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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 629D6C71142 for ; Thu, 11 Jul 2019 17:29:28 +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 3946720863 for ; Thu, 11 Jul 2019 17:29:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="xqr9OR8K" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3946720863 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from mail.linux-foundation.org (localhost [127.0.0.1]) by mail.linuxfoundation.org (Postfix) with ESMTP id 3D6BB54B4; Thu, 11 Jul 2019 17:28:55 +0000 (UTC) Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 1C386530E for ; Thu, 11 Jul 2019 17:19:54 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id C321F89B for ; Thu, 11 Jul 2019 17:19:53 +0000 (UTC) Received: from localhost.localdomain (236.31.169.217.in-addr.arpa [217.169.31.236]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4DBF2216C4; Thu, 11 Jul 2019 17:19:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1562865593; bh=nz8DadbCUrw7HNGlYVbl8QppcMT0N61PTvDR4LgO4ZA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=xqr9OR8KMIdQMDx+dnts/5dG+cZfaW2rRRkbHJGAkYpiE6OmrT/KUvh+MeI/WLt+x 2rZmKpEMt2oQPUJ50expNAXcfclY2RxthgK3VKcU7trVZRYWMBHuj7G5ncC8rl4JPr y24fw7PcKtbWb5ebCVFN18yQLmnIZOEZYBPF92U8= From: Will Deacon To: iommu@lists.linux-foundation.org Subject: [RFC PATCH v2 07/19] iommu/io-pgtable: Introduce tlb_flush_walk() and tlb_flush_leaf() Date: Thu, 11 Jul 2019 18:19:15 +0100 Message-Id: <20190711171927.28803-8-will@kernel.org> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20190711171927.28803-1-will@kernel.org> References: <20190711171927.28803-1-will@kernel.org> Cc: Vijay Kilary , Jean-Philippe Brucker , Will Deacon , Jan Glauber , Alex Williamson , Jayachandran Chandrasekharan Nair , Jon Masters , Robin Murphy 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: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org In preparation for deferring TLB flushes to iommu_tlb_sync(), introduce two new synchronous invalidation helpers to the io-pgtable API, which allow the unmap() code to force invalidation in cases where it cannot be deferred (e.g. when replacing a table with a block or when TLBI_ON_MAP is set). Signed-off-by: Will Deacon --- include/linux/io-pgtable.h | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/include/linux/io-pgtable.h b/include/linux/io-pgtable.h index 6292ea15d674..27275575b305 100644 --- a/include/linux/io-pgtable.h +++ b/include/linux/io-pgtable.h @@ -19,17 +19,31 @@ enum io_pgtable_fmt { /** * struct iommu_flush_ops - IOMMU callbacks for TLB and page table management. * - * @tlb_flush_all: Synchronously invalidate the entire TLB context. - * @tlb_add_flush: Queue up a TLB invalidation for a virtual address range. - * @tlb_sync: Ensure any queued TLB invalidation has taken effect, and - * any corresponding page table updates are visible to the - * IOMMU. + * @tlb_flush_all: Synchronously invalidate the entire TLB context. + * @tlb_flush_walk: Synchronously invalidate all intermediate TLB state + * (sometimes referred to as the "walk cache") for a virtual + * address range. + * @tlb_flush_leaf: Synchronously invalidate all leaf TLB state for a virtual + * address range. + * @tlb_add_flush: Optional callback to queue up leaf TLB invalidation for a + * virtual address range. This function exists purely as an + * optimisation for IOMMUs that cannot batch TLB invalidation + * operations efficiently and are therefore better suited to + * issuing them early rather than deferring them until + * iommu_tlb_sync(). + * @tlb_sync: Ensure any queued TLB invalidation has taken effect, and + * any corresponding page table updates are visible to the + * IOMMU. * * Note that these can all be called in atomic context and must therefore * not block. */ struct iommu_flush_ops { void (*tlb_flush_all)(void *cookie); + void (*tlb_flush_walk)(unsigned long iova, size_t size, size_t granule, + void *cookie); + void (*tlb_flush_leaf)(unsigned long iova, size_t size, size_t granule, + void *cookie); void (*tlb_add_flush)(unsigned long iova, size_t size, size_t granule, bool leaf, void *cookie); void (*tlb_sync)(void *cookie); -- 2.11.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu