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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 72062C5DF8E for ; Fri, 21 Aug 2026 13:28:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=0NWPwCMX3FFAOeoAbfJYVQcERIZ4xx/Yzs3B9WadbE0=; b=z38oynrihVIzsL Ydn6utWEzQDDCuEdPtzYoP4Buu8b5I424QXRR3FFoesRV7oLvDEQBkgMcLwxgFk1sQ//qj9C7eKiF RPCA8LPxJi48k0w9iS75acAum+MjJvnxi0OXnm7cxc2wQrC8sLOplCFSMFbPKR8936v6uq0IbXXxQ 9rJVMqM1D0feCRb3WY1MKaU0tXb1yqhYju75zJ7Ly/HVug6enULMXnRzT5XP9f/5gzE8y5V5iNMFn m1SZ2gAco7dIjUHlJ5OxmZJMgCmSKS6u0JSqkVNuq5AUmOqRpXHVLb75MhlptlfvKldnskVq0dzrp w4iaMHWsliqDynDxqTyg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wxPIA-0000000DPJb-2eVP; Fri, 21 Aug 2026 13:28:18 +0000 Received: from out30-111.freemail.mail.aliyun.com ([115.124.30.111]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wxPI6-0000000DPBf-20ew for linux-riscv@lists.infradead.org; Fri, 21 Aug 2026 13:28:17 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1787318892; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=fN2a+F9K2N+9UIHzo/fPW1ZnfAPXmKisjaWnaBsgmck=; b=pgNzNmrZmEJUStuohurEV6s6AKlvX/zElH8mxtgfTpDpyXZ7uNiY7hgd0NP6R1lTcGDHcv/Xomz2TZsMWNifJ/4PK5rvhlDq8rxKvF3vOQpaF4FSp+9QfKk+GrYSdolkOF7XHzQHg0BnCocI/j5kb/vhBnbk+35U00GkQOhx93s= X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R141e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033037026112;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=24;SR=0;TI=SMTPD_---0X9MSFIP_1787318888; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0X9MSFIP_1787318888 cluster:ay36) by smtp.aliyun-inc.com; Fri, 21 Aug 2026 21:28:10 +0800 From: fangyu.yu@linux.alibaba.com To: tomasz.jeznach@linux.dev, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, baolu.lu@linux.intel.com, jroedel@suse.de, zong.li@sifive.com, andrew.jones@oss.qualcomm.com, anup@brainfault.org, jgg@nvidia.com, jgg@ziepe.ca, kevin.tian@intel.com, atish.patra@linux.dev, skhawaja@google.com, vasant.hegde@amd.com Cc: fangyu.yu@linux.alibaba.com, guoren@kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [RFC PATCH v3 08/10] iommu/riscv: Pre-enable GADE for second-stage domains Date: Fri, 21 Aug 2026 21:27:48 +0800 Message-Id: <20260821132749.82070-9-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260821132749.82070-1-fangyu.yu@linux.alibaba.com> References: <20260821132749.82070-1-fangyu.yu@linux.alibaba.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260821_062816_200885_1F4C2138 X-CRM114-Status: UNSURE ( 7.42 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org From: Fangyu Yu Pre-enable RISCV_IOMMU_DC_TC_GADE in the device context when attaching a second-stage domain, if the IOMMU supports AMO_HWAD. Software pre-populates second-stage page tables with D set, so enabling GADE by default does not change normal behavior. When dirty tracking is enabled, iommufd clears the pre-set D bits and GADE becomes necessary for hardware to update the dirty bit on write access. This avoids toggling GADE dynamically and keeps device context setup consistent with second-stage domain attachment. Signed-off-by: Fangyu Yu --- drivers/iommu/riscv/iommu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index 16779877351b..f01fd4e2f840 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1330,6 +1330,8 @@ static int riscv_iommu_attach_paging_domain(struct iommu_domain *iommu_domain, FIELD_PREP(RISCV_IOMMU_DC_IOHGATP_MODE, pt_info.iohgatp_mode) | FIELD_PREP(RISCV_IOMMU_DC_IOHGATP_GSCID, domain->gscid) | FIELD_PREP(RISCV_IOMMU_DC_IOHGATP_PPN, pt_info.ppn); + if (iommu->caps & RISCV_IOMMU_CAPABILITIES_AMO_HWAD) + dc.tc |= RISCV_IOMMU_DC_TC_GADE; } else { if (!riscv_iommu_fsc_supported(iommu, pt_info.fsc_iosatp_mode)) return -ENODEV; -- 2.50.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv