From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.30.113 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793328592; b=fTU173Yd1cq7iC+ncnJikF5hA8V1qtKixlBa0Ci05d+4PUlER8dFWiZX5/iNeFqkmN2F +CkLxC4XFvAs0Pc7oT7GawuaNPTTzCZDWgXjRL+VTeZpelu/DNbDIrWGJyA7r19UBXd0P GCTuxvqE/mYlzIyz+nzLyRV13uUhXmDOgBgZxFyByDevvi06bM39Rnuuj5SAYHMigcnng HJzjLakTkphR/CGMCoZMnDHD2yoEEgeJ4AxGeDvNWoRtGl/MlUAB6v/GrYcAgJdUGY+et x7pNY1HuBS8seJXSNeH7UIOb7ZRlOcsVwXw39QvCkQfEplkK12p0Ba/3geTnDfSZJjQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793328592; 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=CfEmxolAK8lSlcJ/IDJ4OjlHBkMazQyT8J7ibClDgoI=; b=O2OJIELYxA9YonU8joqhtWSZxEXEYO4KvNeaxnbBJCom7FI35unogT6wsiWzX4spOeAK MIYSaMIYlxuXPiBJz6N5MzFFCqEXJ74pU/aRhxPKohJoeZkc13uRJLJw3QEpOmpDFwhYn RFP6uEPtImJXTsXam6Nxx3yut+K54c9kgWSjkoIZUz95czjSbmhX0VbRlKXaGqlneRV+B 4PeCCRbDn7zbqnGrc3+028bd0u66xCp92RzhnHsLs2WvtPk2trEGFESxrsCTJKJjcwM04 wkFp6b80RKn4Yz19FEudM461opLQPFW2et+8riUrS7mQL42qDnxjdQghWZuYeKKzl4Q== 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="Na6KxF/1"; arc=none smtp.remote-ip=115.124.30.113 Received: from out30-113.freemail.mail.aliyun.com (out30-113.freemail.mail.aliyun.com [115.124.30.113]) (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 891F7606A31A for ; Fri, 30 Oct 2026 02:49:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 891F7606A31A 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=Na6KxF/1 DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1793328589; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=CfEmxolAK8lSlcJ/IDJ4OjlHBkMazQyT8J7ibClDgoI=; b=Na6KxF/102AdTUz136z8HdPBWN7K2OpcY6fLCIFV7ntQeUOYXMA0TxGnMETPUWWZ1x3iAbOi/k4GGPTO//4ABi1riQfMO3RwZqDZIhFtmdX4VP38tQOKcj+Lvr50235AwYqeFDd+8sCmn26NoFN/IPOcs0xSV3dIanAYu9i6rHI= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R191e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033032089153;MF=fangyu.yu@linux.alibaba.com;NM=1;PH=DS;RN=6;SR=0;TI=SMTPD_---0XDkuzbU_1793328587; Received: from localhost.localdomain(mailfrom:fangyu.yu@linux.alibaba.com fp:SMTPD_---0XDkuzbU_1793328587 cluster:ay36) by smtp.aliyun-inc.com; Fri, 30 Oct 2026 10:49:48 +0800 From: fangyu.yu@linux.alibaba.com To: gong.shuai@sanechips.com.cn Cc: fangyu.yu@linux.alibaba.com, iommu@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [RFC PATCH v5 03/10] iommu/riscv: report iommu capabilities Date: Fri, 30 Oct 2026 10:49:46 +0800 Message-Id: <20261030024946.93889-1-fangyu.yu@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 (Apple Git-146) In-Reply-To: <20261030023104.51259-1-gong.shuai@sanechips.com.cn> References: <20261030023104.51259-1-gong.shuai@sanechips.com.cn> 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 >Hi Fangyu, > >> From: Tomasz Jeznach >> >> Report RISC-V IOMMU capabilities required by VFIO subsystem >> to enable PCIe device assignment. >> >> Signed-off-by: Tomasz Jeznach >> Signed-off-by: Fangyu Yu >> Reviewed-by: Nutty Liu > >This patch has already been merged >https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3069e8f3e1e9bdf007316eadae4d1777065e7b78 > Thanks for pointing that out. I'll drop this patch in the next version. Thanks, Fangyu >Thanks, >Shuai > >> --- >> drivers/iommu/riscv/iommu.c | 11 +++++++++++ >> 1 file changed, 11 insertions(+) >> >> diff --git a/drivers/iommu/riscv/iommu.c b/drivers/iommu/riscv/iommu.c >> index fe8e6d0f8a23..40beccedd39f 100644 >> --- a/drivers/iommu/riscv/iommu.c >> +++ b/drivers/iommu/riscv/iommu.c >> @@ -1444,6 +1444,16 @@ static struct iommu_group *riscv_iommu_device_group(struct device *dev) >> return generic_device_group(dev); >> } >> >> +static bool riscv_iommu_capable(struct device *dev, enum iommu_cap cap) >> +{ >> + switch (cap) { >> + case IOMMU_CAP_CACHE_COHERENCY: >> + return true; >> + default: >> + return false; >> + } >> +} >> + >> static int riscv_iommu_of_xlate(struct device *dev, const struct of_phandle_args *args) >> { >> return iommu_fwspec_add_ids(dev, args->args, 1); >> @@ -1505,6 +1515,7 @@ static void riscv_iommu_release_device(struct device *dev) >> >> static const struct iommu_ops riscv_iommu_ops = { >> .of_xlate = riscv_iommu_of_xlate, >> + .capable = riscv_iommu_capable, >> .identity_domain = &riscv_iommu_identity_domain, >> .blocked_domain = &riscv_iommu_blocking_domain, >> .release_domain = &riscv_iommu_blocking_domain, >> -- >> 2.50.1