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=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, 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 04D6CC433DF for ; Wed, 27 May 2020 11:53:32 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 AD789207CB for ; Wed, 27 May 2020 11:53:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org AD789207CB Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=8bytes.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 6E06D2322B; Wed, 27 May 2020 11:53:31 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id qxdKlgrO-kVs; Wed, 27 May 2020 11:53:30 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 9FDF42045E; Wed, 27 May 2020 11:53:30 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 6C175C016F; Wed, 27 May 2020 11:53:30 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id 42E5BC016F for ; Wed, 27 May 2020 11:53:29 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 2BF4286D15 for ; Wed, 27 May 2020 11:53:29 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 5ssopwNGQDcy for ; Wed, 27 May 2020 11:53:27 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 964EB86D04 for ; Wed, 27 May 2020 11:53:27 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id A2F9E3D0; Wed, 27 May 2020 13:53:23 +0200 (CEST) From: Joerg Roedel To: Joerg Roedel Subject: [PATCH 03/10] iommu/amd: Let free_pagetable() not rely on domain->pt_root Date: Wed, 27 May 2020 13:53:06 +0200 Message-Id: <20200527115313.7426-4-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200527115313.7426-1-joro@8bytes.org> References: <20200527115313.7426-1-joro@8bytes.org> Cc: iommu@lists.linux-foundation.org, jroedel@suse.de, linux-kernel@vger.kernel.org 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" From: Joerg Roedel Use 'struct domain_pgtable' instead to free_pagetable(). This solves the problem that amd_iommu_domain_direct_map() needs to restore domain->pt_root after the device table has been updated just to make free_pagetable release the domain page-table. Signed-off-by: Joerg Roedel --- drivers/iommu/amd/iommu.c | 36 ++++++++++++++++-------------------- 1 file changed, 16 insertions(+), 20 deletions(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 8368f6b9c17f..c7e47a7f0d45 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1391,20 +1391,19 @@ static struct page *free_sub_pt(unsigned long root, int mode, return freelist; } -static void free_pagetable(struct protection_domain *domain) +static void free_pagetable(struct domain_pgtable *pgtable) { - struct domain_pgtable pgtable; struct page *freelist = NULL; unsigned long root; - amd_iommu_domain_get_pgtable(domain, &pgtable); - atomic64_set(&domain->pt_root, 0); + if (pgtable->mode == PAGE_MODE_NONE) + return; - BUG_ON(pgtable.mode < PAGE_MODE_NONE || - pgtable.mode > PAGE_MODE_6_LEVEL); + BUG_ON(pgtable->mode < PAGE_MODE_NONE || + pgtable->mode > PAGE_MODE_6_LEVEL); - root = (unsigned long)pgtable.root; - freelist = free_sub_pt(root, pgtable.mode, freelist); + root = (unsigned long)pgtable->root; + freelist = free_sub_pt(root, pgtable->mode, freelist); free_page_list(freelist); } @@ -1823,12 +1822,16 @@ static void free_gcr3_table(struct protection_domain *domain) */ static void dma_ops_domain_free(struct protection_domain *domain) { + struct domain_pgtable pgtable; + if (!domain) return; iommu_put_dma_cookie(&domain->domain); - free_pagetable(domain); + amd_iommu_domain_get_pgtable(domain, &pgtable); + atomic64_set(&domain->pt_root, 0); + free_pagetable(&pgtable); if (domain->id) domain_id_free(domain->id); @@ -2496,9 +2499,8 @@ static void amd_iommu_domain_free(struct iommu_domain *dom) break; default: amd_iommu_domain_get_pgtable(domain, &pgtable); - - if (pgtable.mode != PAGE_MODE_NONE) - free_pagetable(domain); + atomic64_set(&domain->pt_root, 0); + free_pagetable(&pgtable); if (domain->flags & PD_IOMMUV2_MASK) free_gcr3_table(domain); @@ -2796,7 +2798,6 @@ void amd_iommu_domain_direct_map(struct iommu_domain *dom) struct protection_domain *domain = to_pdomain(dom); struct domain_pgtable pgtable; unsigned long flags; - u64 pt_root; spin_lock_irqsave(&domain->lock, flags); @@ -2804,18 +2805,13 @@ void amd_iommu_domain_direct_map(struct iommu_domain *dom) amd_iommu_domain_get_pgtable(domain, &pgtable); /* Update data structure */ - pt_root = amd_iommu_domain_encode_pgtable(NULL, PAGE_MODE_NONE); - atomic64_set(&domain->pt_root, pt_root); + atomic64_set(&domain->pt_root, 0); /* Make changes visible to IOMMUs */ update_domain(domain); - /* Restore old pgtable in domain->ptroot to free page-table */ - pt_root = amd_iommu_domain_encode_pgtable(pgtable.root, pgtable.mode); - atomic64_set(&domain->pt_root, pt_root); - /* Page-table is not visible to IOMMU anymore, so free it */ - free_pagetable(domain); + free_pagetable(&pgtable); spin_unlock_irqrestore(&domain->lock, flags); } -- 2.17.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu