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=-10.0 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 1D3F8C433E1 for ; Thu, 25 Jun 2020 14:52:36 +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 EFAA120775 for ; Thu, 25 Jun 2020 14:52:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org EFAA120775 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 BA82823119; Thu, 25 Jun 2020 14:52:35 +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 AzZqA+RRnx2I; Thu, 25 Jun 2020 14:52:34 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id EE8A9203B2; Thu, 25 Jun 2020 14:52:33 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D8ECDC088E; Thu, 25 Jun 2020 14:52:33 +0000 (UTC) Received: from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138]) by lists.linuxfoundation.org (Postfix) with ESMTP id DEBCFC016F for ; Thu, 25 Jun 2020 14:52:31 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by whitealder.osuosl.org (Postfix) with ESMTP id CEB9087D42 for ; Thu, 25 Jun 2020 14:52:31 +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 HZahk3hSkMbo for ; Thu, 25 Jun 2020 14:52:31 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from theia.8bytes.org (8bytes.org [81.169.241.247]) by whitealder.osuosl.org (Postfix) with ESMTPS id 21042875CD for ; Thu, 25 Jun 2020 14:52:31 +0000 (UTC) Received: by theia.8bytes.org (Postfix, from userid 1000) id 68DE8366; Thu, 25 Jun 2020 16:52:28 +0200 (CEST) From: Joerg Roedel To: Joerg Roedel Subject: [PATCH 1/2] iommu/amd: Add helper functions to update domain->pt_root Date: Thu, 25 Jun 2020 16:52:26 +0200 Message-Id: <20200625145227.4159-2-joro@8bytes.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200625145227.4159-1-joro@8bytes.org> References: <20200625145227.4159-1-joro@8bytes.org> Cc: iommu@lists.linux-foundation.org, Joerg Roedel , 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 Do not call atomic64_set() directly to update the domain page-table root and use two new helper functions. This makes it easier to implement additional work necessary when the page-table is updated. Signed-off-by: Joerg Roedel --- drivers/iommu/amd/iommu.c | 31 ++++++++++++++++++++----------- 1 file changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 74cca1757172..5286ddcfc2f9 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -162,7 +162,18 @@ static void amd_iommu_domain_get_pgtable(struct protection_domain *domain, pgtable->mode = pt_root & 7; /* lowest 3 bits encode pgtable mode */ } -static u64 amd_iommu_domain_encode_pgtable(u64 *root, int mode) +static void amd_iommu_domain_set_pt_root(struct protection_domain *domain, u64 root) +{ + atomic64_set(&domain->pt_root, root); +} + +static void amd_iommu_domain_clr_pt_root(struct protection_domain *domain) +{ + amd_iommu_domain_set_pt_root(domain, 0); +} + +static void amd_iommu_domain_set_pgtable(struct protection_domain *domain, + u64 *root, int mode) { u64 pt_root; @@ -170,7 +181,7 @@ static u64 amd_iommu_domain_encode_pgtable(u64 *root, int mode) pt_root = mode & 7; pt_root |= (u64)root; - return pt_root; + amd_iommu_domain_set_pt_root(domain, pt_root); } static struct iommu_dev_data *alloc_dev_data(u16 devid) @@ -1410,7 +1421,7 @@ static bool increase_address_space(struct protection_domain *domain, struct domain_pgtable pgtable; unsigned long flags; bool ret = true; - u64 *pte, root; + u64 *pte; spin_lock_irqsave(&domain->lock, flags); @@ -1438,8 +1449,7 @@ static bool increase_address_space(struct protection_domain *domain, * Device Table needs to be updated and flushed before the new root can * be published. */ - root = amd_iommu_domain_encode_pgtable(pte, pgtable.mode); - atomic64_set(&domain->pt_root, root); + amd_iommu_domain_set_pgtable(domain, pte, pgtable.mode); ret = true; @@ -2319,7 +2329,7 @@ static void protection_domain_free(struct protection_domain *domain) domain_id_free(domain->id); amd_iommu_domain_get_pgtable(domain, &pgtable); - atomic64_set(&domain->pt_root, 0); + amd_iommu_domain_clr_pt_root(domain); free_pagetable(&pgtable); kfree(domain); @@ -2327,7 +2337,7 @@ static void protection_domain_free(struct protection_domain *domain) static int protection_domain_init(struct protection_domain *domain, int mode) { - u64 *pt_root = NULL, root; + u64 *pt_root = NULL; BUG_ON(mode < PAGE_MODE_NONE || mode > PAGE_MODE_6_LEVEL); @@ -2343,8 +2353,7 @@ static int protection_domain_init(struct protection_domain *domain, int mode) return -ENOMEM; } - root = amd_iommu_domain_encode_pgtable(pt_root, mode); - atomic64_set(&domain->pt_root, root); + amd_iommu_domain_set_pgtable(domain, pt_root, mode); return 0; } @@ -2713,8 +2722,8 @@ void amd_iommu_domain_direct_map(struct iommu_domain *dom) /* First save pgtable configuration*/ amd_iommu_domain_get_pgtable(domain, &pgtable); - /* Update data structure */ - atomic64_set(&domain->pt_root, 0); + /* Remove page-table from domain */ + amd_iommu_domain_clr_pt_root(domain); /* Make changes visible to IOMMUs */ update_domain(domain); -- 2.27.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu