From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF1AE45091D; Tue, 28 Apr 2026 13:14:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=115.124.30.111 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777382070; cv=none; b=myxnp27XkuCl/4eWn5QzMB0thNw4ttzJs3EhNK60ZaGdR5/Dryt9jdtRuJArLFCEbyuaUwj6OMaAFfdYXt33ZI9nsE3WMPgf40ydLEmhxdocKoodvsbSMxe2jR+EL6meEbFYXuS6tPDkPp1VENAR4g/w7zYIDA1KmdRYecksIbA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777382070; c=relaxed/simple; bh=9l5J2IcJPjHU73EY5WFkQWCg8u7oIh9DL9z3SVjfGpg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=q2prAG/CVteXzbjg870/3fUBMB/VJC1AiFhves4jjb8BFvLbFcjjEwMrCjOhaP6ykrcWQ6msBuMFKYEWIrXoWyUIuO2BwxT42RPs5hHOUalIXCy2FD11XTHrpu6GSeLaJfxCUT8JQJavRr90gKdlrc9R0AMTJMXHdfuvCpeKbv8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b=W9s16CXP; arc=none smtp.client-ip=115.124.30.111 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.b="W9s16CXP" DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1777382059; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=MqNgI4sv+FepWpFcUsgsx+IZ0W7HlKVhYzr2f1YWc7s=; b=W9s16CXPKPac3Kt6thDkIY+bNgz66Fcn7yvM650X3ePkz421wApDXQz6xvIDPxHQkgsbtASJmqi36EpXHItT+mNL5jsNviB9j4aaevoe6uj0k1FpxpGa6Dtcu32vxtjwFDLrD3/pFmheUz6qYfXiBmglATaoB6QGCAlVRQ9Qr2Y= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R271e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045098064;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=24;SR=0;TI=SMTPD_---0X1ubIET_1777382056; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0X1ubIET_1777382056 cluster:ay36) by smtp.aliyun-inc.com; Tue, 28 Apr 2026 21:14:17 +0800 From: fangyu.yu@linux.alibaba.com To: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.fr, tjeznach@rivosinc.com, jgg@ziepe.ca, kevin.tian@intel.com, baolu.lu@linux.intel.com, vasant.hegde@amd.com, anup@brainfault.org, atish.patra@linux.dev, skhawaja@google.com, jgg@nvidia.com Cc: guoren@kernel.org, kvm@vger.kernel.org, iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Zong Li , Fangyu Yu Subject: [RFC PATCH 03/11] iommu/riscv: use data structure instead of individual values Date: Tue, 28 Apr 2026 21:13:51 +0800 Message-Id: <20260428131359.34872-4-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20260428131359.34872-1-fangyu.yu@linux.alibaba.com> References: <20260428131359.34872-1-fangyu.yu@linux.alibaba.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Zong Li The parameter will be increased when we need to set up more bit fields in the device context. Use a data structure to wrap them up. Signed-off-by: Zong Li Signed-off-by: Fangyu Yu --- drivers/iommu/riscv/iommu.c | 27 +++++++++++++++++---------- 1 file changed, 17 insertions(+), 10 deletions(-) diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c index 15e2a333f969..369c98b7e1e5 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1077,7 +1077,7 @@ static void riscv_iommu_iodir_iotinval(struct riscv_iommu_device *iommu, * interim translation faults. */ static void riscv_iommu_iodir_update(struct riscv_iommu_device *iommu, - struct device *dev, u64 fsc, u64 ta) + struct device *dev, struct riscv_iommu_dc *new_dc) { struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct riscv_iommu_dc *dc; @@ -1116,10 +1116,10 @@ static void riscv_iommu_iodir_update(struct riscv_iommu_device *iommu, for (i = 0; i < fwspec->num_ids; i++) { dc = riscv_iommu_get_dc(iommu, fwspec->ids[i]); tc = READ_ONCE(dc->tc); - tc |= ta & RISCV_IOMMU_DC_TC_V; + tc |= new_dc->ta & RISCV_IOMMU_DC_TC_V; - WRITE_ONCE(dc->fsc, fsc); - WRITE_ONCE(dc->ta, ta & RISCV_IOMMU_PC_TA_PSCID); + WRITE_ONCE(dc->fsc, new_dc->fsc); + WRITE_ONCE(dc->ta, new_dc->ta & RISCV_IOMMU_PC_TA_PSCID); /* Update device context, write TC.V as the last step. */ dma_wmb(); WRITE_ONCE(dc->tc, tc); @@ -1205,22 +1205,22 @@ static int riscv_iommu_attach_paging_domain(struct iommu_domain *iommu_domain, struct riscv_iommu_device *iommu = dev_to_iommu(dev); struct riscv_iommu_info *info = dev_iommu_priv_get(dev); struct pt_iommu_riscv_64_hw_info pt_info; - u64 fsc, ta; + struct riscv_iommu_dc dc = {0}; pt_iommu_riscv_64_hw_info(&domain->riscvpt, &pt_info); if (!riscv_iommu_pt_supported(iommu, pt_info.fsc_iosatp_mode)) return -ENODEV; - fsc = FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, pt_info.fsc_iosatp_mode) | + dc.fsc = FIELD_PREP(RISCV_IOMMU_PC_FSC_MODE, pt_info.fsc_iosatp_mode) | FIELD_PREP(RISCV_IOMMU_PC_FSC_PPN, pt_info.ppn); - ta = FIELD_PREP(RISCV_IOMMU_PC_TA_PSCID, domain->pscid) | + dc.ta = FIELD_PREP(RISCV_IOMMU_PC_TA_PSCID, domain->pscid) | RISCV_IOMMU_PC_TA_V; if (riscv_iommu_bond_link(domain, dev)) return -ENOMEM; - riscv_iommu_iodir_update(iommu, dev, fsc, ta); + riscv_iommu_iodir_update(iommu, dev, &dc); riscv_iommu_bond_unlink(info->domain, dev); info->domain = domain; @@ -1292,9 +1292,12 @@ static int riscv_iommu_attach_blocking_domain(struct iommu_domain *iommu_domain, { struct riscv_iommu_device *iommu = dev_to_iommu(dev); struct riscv_iommu_info *info = dev_iommu_priv_get(dev); + struct riscv_iommu_dc dc = {0}; + + dc.fsc = RISCV_IOMMU_FSC_BARE; /* Make device context invalid, translation requests will fault w/ #258 */ - riscv_iommu_iodir_update(iommu, dev, RISCV_IOMMU_FSC_BARE, 0); + riscv_iommu_iodir_update(iommu, dev, &dc); riscv_iommu_bond_unlink(info->domain, dev); info->domain = NULL; @@ -1314,8 +1317,12 @@ static int riscv_iommu_attach_identity_domain(struct iommu_domain *iommu_domain, { struct riscv_iommu_device *iommu = dev_to_iommu(dev); struct riscv_iommu_info *info = dev_iommu_priv_get(dev); + struct riscv_iommu_dc dc = {0}; + + dc.fsc = RISCV_IOMMU_FSC_BARE; + dc.ta = RISCV_IOMMU_PC_TA_V; - riscv_iommu_iodir_update(iommu, dev, RISCV_IOMMU_FSC_BARE, RISCV_IOMMU_PC_TA_V); + riscv_iommu_iodir_update(iommu, dev, &dc); riscv_iommu_bond_unlink(info->domain, dev); info->domain = NULL; -- 2.50.1