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=-14.2 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 56674C48BE5 for ; Wed, 16 Jun 2021 17:34:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 379B861356 for ; Wed, 16 Jun 2021 17:34:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231405AbhFPRge (ORCPT ); Wed, 16 Jun 2021 13:36:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38734 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231352AbhFPRgb (ORCPT ); Wed, 16 Jun 2021 13:36:31 -0400 Received: from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com [IPv6:2607:f8b0:4864:20::42d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82A67C061574 for ; Wed, 16 Jun 2021 10:34:25 -0700 (PDT) Received: by mail-pf1-x42d.google.com with SMTP id k6so2742037pfk.12 for ; Wed, 16 Jun 2021 10:34:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jWMknRbD8X1K6AG9lburjdKW9p491bZf6T9lQOWSxxM=; b=WYmmuQrhubPiSJDW9wGOaMi600sb+jgw6jlrzgd9MuDRuGCR80bvURFllIw8BfQXVd 4TFjA0fLpdScaKVxoEDyng4DGCWQbHnszW/V0kBgfohgSjKJm3f1tT0vIceGETESOO10 /JipqRvLbzUuJytPGb+aKPld2kHiZV5mAV1gx96jX+eW/PNQCcTjV5sXlX2uLBdz3I9O nPlleW5R4avJw5GfeuF2ZgN8grnuRua/eWnJwAZehamQ/XJR2kDzuCvJ2MphojHlFZqJ QUThUTYiB6Z46cVzcvpsYirJLprl+ERslbjm5wGrYVjimjcTTB7NIKBBwKjbT1O/qHOG RFVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jWMknRbD8X1K6AG9lburjdKW9p491bZf6T9lQOWSxxM=; b=MsP8AN1e6OG4Ycc+Tf2djHW6yIFFTAnaEjgkkREDQX8uBpLYcLnSrF/2+7/oa46fVe 6C7XKn5kOdFXVEEYuhn5Ujt/nCAKdl4rwuI9ARYxbNduTnqOjVfuHar2F0OLhc5fWfhK OMGGHVRCqaF+eaLEUYT8twe43Xkr/sLwkbLmbeAgLWhEn6YhfJaH0apzSGQH0NUcKb1D 1i/d8+cwe7JsuOtx9r8vF0r2yAdsY1HCjuBc0C+vZ28PESY8OOvl1CjgZfH2/ri/NIu1 DFmziHnigDA5ySWEOcg7sjOauzzXx6BKGdEDzeMBOPnwoVNn02EAA0cUi/r9ZsoID35g Ed3g== X-Gm-Message-State: AOAM530QNTy5TubatOiKPbJEDYa50k9GJrmQTmeRRlzpPd5kOYt4peAD Eu2RI5MbJTfACqjUfMmiILE= X-Google-Smtp-Source: ABdhPJz436Zw3YWQKZ/hPtmHRb319Ej3srR8Gc/K3d86FxQPw/wKMhw2zFKWx/8HRIJNrwlO9X6YPw== X-Received: by 2002:aa7:9983:0:b029:2e9:e086:7917 with SMTP id k3-20020aa799830000b02902e9e0867917mr943222pfh.57.1623864864946; Wed, 16 Jun 2021 10:34:24 -0700 (PDT) Received: from sc2-haas01-esx0118.eng.vmware.com ([66.170.99.1]) by smtp.gmail.com with ESMTPSA id m3sm2933901pfh.174.2021.06.16.10.34.23 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Jun 2021 10:34:24 -0700 (PDT) From: Nadav Amit X-Google-Original-From: Nadav Amit To: Joerg Roedel Cc: Nadav Amit , Will Deacon , Jiajun Cao , Robin Murphy , Lu Baolu , iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 1/7] iommu/amd: Selective flush on unmap Date: Wed, 16 Jun 2021 03:04:54 -0700 Message-Id: <20210616100500.174507-2-namit@vmware.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210616100500.174507-1-namit@vmware.com> References: <20210616100500.174507-1-namit@vmware.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Nadav Amit Recent patch attempted to enable selective page flushes on AMD IOMMU but neglected to adapt amd_iommu_iotlb_sync() to use the selective flushes. Adapt amd_iommu_iotlb_sync() to use selective flushes and change amd_iommu_unmap() to collect the flushes. As a defensive measure, to avoid potential issues as those that the Intel IOMMU driver encountered recently, flush the page-walk caches by always setting the "pde" parameter. This can be removed later. Cc: Joerg Roedel Cc: Will Deacon Cc: Jiajun Cao Cc: Robin Murphy Cc: Lu Baolu Cc: iommu@lists.linux-foundation.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Nadav Amit --- drivers/iommu/amd/iommu.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 3ac42bbdefc6..3e40f6610b6a 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2059,12 +2059,17 @@ static size_t amd_iommu_unmap(struct iommu_domain *dom, unsigned long iova, { struct protection_domain *domain = to_pdomain(dom); struct io_pgtable_ops *ops = &domain->iop.iop.ops; + size_t r; if ((amd_iommu_pgtable == AMD_IOMMU_V1) && (domain->iop.mode == PAGE_MODE_NONE)) return 0; - return (ops->unmap) ? ops->unmap(ops, iova, page_size, gather) : 0; + r = (ops->unmap) ? ops->unmap(ops, iova, page_size, gather) : 0; + + iommu_iotlb_gather_add_page(dom, gather, iova, page_size); + + return r; } static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom, @@ -2167,7 +2172,13 @@ static void amd_iommu_flush_iotlb_all(struct iommu_domain *domain) static void amd_iommu_iotlb_sync(struct iommu_domain *domain, struct iommu_iotlb_gather *gather) { - amd_iommu_flush_iotlb_all(domain); + struct protection_domain *dom = to_pdomain(domain); + unsigned long flags; + + spin_lock_irqsave(&dom->lock, flags); + __domain_flush_pages(dom, gather->start, gather->end - gather->start, 1); + amd_iommu_domain_flush_complete(dom); + spin_unlock_irqrestore(&dom->lock, flags); } static int amd_iommu_def_domain_type(struct device *dev) -- 2.25.1