From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.30.111 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792489293; b=DkHFtOdUhl1hwD43vjGGiwUcNBTuJJ+oi2jRNOOzQ4hVLnoK+vGHhUIS8NgDxbwV4FCW DM+/AXsNJWzSXuLBEVm+IkkFi5iz48mDs7uBy/ZaqxKYqgZTmkkZCkTpPEEMGKJP8YSCP OracugRdZbDnituBjA90TwDsa0U3DG73Kra6pxcQjY2uPfJwptLfGn0x+LIuwJ6mRdl5f GZUzGKPkH2dvhelBwdwud/RufcSyHnipwpsClMVSYDhAl+ySI/2qgf9HJMsd4vxvVjn/q Caq77pcl1xgk7mfMvG4jnK1n3Wby6u1XxAFhERv8TuwudrDlyfu6AMoCt/mhXdWbyyA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792489293; h=DMARC-Filter:DKIM-Signature:X-Alimail-AntiSpam:Received:From:To:Cc: Subject:Date:Message-Id:X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=MXWzJLYAP4Ij/Wl7a35fnTdKXxDkC5cxjyoc0isXiuA=; b=uzNnrj6aluhCQ8a37nP2HRBa21sh1jhcoZIee/iPsdqIChjgCewzzZi1qX7ceLaTBMGH hkKVdLi9OzGLvWjV/bQXY0OyhZpMtEx/kKY0owM9MgXB5d0vMnQhFrekZVsux86H5D6R5 viP+TtG/MvwSzcpndDAKnCxceyGvEg/M6MCj0ZxPr7nQMYIYMhZropO7+F25lrIhHwUFh ep4Agnd72G/tg2u/gAOCLfdMaOlt3viGjePGAO//Cz/pHpqpEZNcHCv9f2PxR6aSK3eNz RisKmofAZu6KU1Me6IYBBe2wD5nq8BSo3+IBVfgf3WqzYt2d2LbMPPTRyEmL1OyM+tA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=Xanv0Ej5; arc=none smtp.remote-ip=115.124.30.111 Received: from out30-111.freemail.mail.aliyun.com (out30-111.freemail.mail.aliyun.com [115.124.30.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B8AD60A3811 for ; Tue, 20 Oct 2026 09:41:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 7B8AD60A3811 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, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=Xanv0Ej5 DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1792489290; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=MXWzJLYAP4Ij/Wl7a35fnTdKXxDkC5cxjyoc0isXiuA=; b=Xanv0Ej5ecfuNbBLJj+7tcFaRKKz0rI9qYKsH2psYKHwgaXM2MAhPnpOKrHV4jez7P1VvOx+hKRvevE7nReWW4DIBzffz4/lwLaHJrPOFhj/qoFiK9kz2nEmc2rek1MKN6Eh0WOMjmfH55ZRl2ACg6BiI3SuxlsmYT82dq+TlMw= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R311e4;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=29;SR=0;TI=SMTPD_---0XDCspXL_1792489283; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0XDCspXL_1792489283 cluster:ay36) by smtp.aliyun-inc.com; Tue, 20 Oct 2026 17:41:27 +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@linux.dev, anup@brainfault.org, jgg@nvidia.com, jgg@ziepe.ca, kevin.tian@intel.com, atish.patra@linux.dev, skhawaja@google.com, vasant.hegde@amd.com, joerg.roedel@amd.com, tanchi25@mails.ucas.ac.cn, gong.shuai@sanechips.com.cn Cc: fangyu.yu@linux.alibaba.com, guoren@kernel.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, kvm-riscv@lists.infradead.org, Nutty Liu Subject: [RFC PATCH v5 04/10] iommu/riscv: use data structure instead of individual values Date: Tue, 20 Oct 2026 17:41:00 +0800 Message-Id: <20261020094106.92722-5-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261020094106.92722-1-fangyu.yu@linux.alibaba.com> References: <20261020094106.92722-1-fangyu.yu@linux.alibaba.com> X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list 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 Reviewed-by: Nutty Liu --- 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 40beccedd39f..3e1c8863ba0d 100644 --- a/drivers/iommu/riscv/iommu.c +++ b/drivers/iommu/riscv/iommu.c @@ -1187,7 +1187,7 @@ 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; @@ -1226,10 +1226,10 @@ 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); @@ -1310,22 +1310,22 @@ 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; @@ -1400,9 +1400,12 @@ 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; @@ -1422,8 +1425,12 @@ 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