From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792756666; b=rtF3UF9zp5olNqaFIRELMD1Qgo6fqo3rGjBr582EmSCw6HX8ok/EXOP5FzjD4jjTfi7B 7HC+wQCygzZHSLvAm0Rce21NzHqd3ZkWsNvcUYCwzrenk99/gObd0KrlSAKgR5c1wmwwH yFxMJfzuKgKPC3sB+QywqHHD2mKEkBNs5ZXDoVAQBSXiseNywaN04LOqF845ncEJNsTEY pqCAEQDbLj8TFYIjwgX8tnu2a0xXa/eDWrpEadEYsTEkAkJOZpyuS9wnEOTuLmlJtHRbs C/dY6ztg0lIbYmEVxlJ/gkIN/wO+ZkdSsjk6rhdX2gRNO+9Ca58qpkokLVWR1hQxiQw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792756666; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=G4ewQLUXqh6UoQ5uJbT6hYexcqObJQ6Phji4QpcyzL8=; b=LS8ILKjDoennb2gf+GOFEapGYCZHTy8TH8xItY4XIEocRhtImdvwQOtIA3dqK2IolbWY xt4adfjj15tSdMdPBfK10UDAnIvEFFz0h+Ig0nj+Sjgo3TA143W6Nc1Nwz6OKEtfije7/ pBVgp9035NT9EPRIa+YKqquArKfToD+rEaCBMdLRwzABMuqzjY1UnmMaNrSGQvsbnlKsh Z3gCNTPBo9KxjG7YueD2Kxrw9GZ0L7cYTRAPLjWaTqIKUkbkwry5RCS8hJtM4BxUks5Gb 7lRmrnYehw14qfh46/pXYrDcmacdR0lEtelX4etEEf3uT0oiuCoCtR/lRG0ArdvBUKg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=WaLp0bpR; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6FFB7606A31D; Fri, 23 Oct 2026 11:57:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=WaLp0bpR Received: by smtp.kernel.org (Postfix) with ESMTPSA id 914361F01825; Fri, 23 Oct 2026 11:57:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792756666; bh=G4ewQLUXqh6UoQ5uJbT6hYexcqObJQ6Phji4QpcyzL8=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=WaLp0bpRfAVN6OXKomOYDcg/G6wVG7rd3noWw8X64V8rYzUwa6hoVCzGNNB9XS85X laSZCZ8R1n/wbzm5Ltq1xVauCa1zOStiS9c72lEuJPyL1vE/e2BlDWoLYses9Qh87m 1kzJECu/VlpFsH/R2xz4BGFByrGICyvT6KqPOCrdEPRLLoK4x2+ClMH3mgBEWBIv6x TUSXYFfE/Fl0c2fDs0jY2ja7LNrrJS68QwA2GEY0ybbW6IiaG3hrt6ZO1KtFUV6V2W guIOw/oYIoWXPHPDki/kWCeGI+d8V8Xptqj9kf4tySPYSycrBbtGoM4SjGMWFGZGi+ JcnNyfgmGO6Yg== Date: Fri, 23 Oct 2026 13:57:42 +0200 From: Krzysztof Kozlowski To: Vishnu Santhosh Cc: Stephan Gerhold , Andrew Lunn , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Loic Poulain , Sergey Ryazanov , Johannes Berg , Eric Dumazet , linux-arm-msm@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Deepak Kumar Singh Subject: Re: [PATCH net-next v3 1/2] dt-bindings: net: qcom,bam-dmux: Add memory-region and qcom,vmid properties Message-ID: <20261023-rational-fuzzy-chital-7ff1c0@quoll> References: <20261021-qcom-bam-dmux-vmid-ext-v3-0-cedd1f681102@oss.qualcomm.com> <20261021-qcom-bam-dmux-vmid-ext-v3-1-cedd1f681102@oss.qualcomm.com> X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20261021-qcom-bam-dmux-vmid-ext-v3-1-cedd1f681102@oss.qualcomm.com> On Wed, Oct 21, 2026 at 12:09:43PM +0530, Vishnu Santhosh wrote: > Some Qualcomm SoCs, such as Shikra, run the modem in a separate security > domain with restricted access to system memory. BAM-DMUX DMA mappings > must therefore be constrained to a designated region that can be shared > with the modem. > > Add an optional memory-region property to reference a restricted DMA > pool used for BAM-DMUX mappings, and a qcom,vmid property to identify the > remote execution environment that is granted access to the pool through > SCM. > > Require memory-region whenever qcom,vmid is specified. > > Add the qcom,shikra-bam-dmux compatible, with qcom,bam-dmux as fallback, > and require both properties for it. > > Co-developed-by: Deepak Kumar Singh > Signed-off-by: Deepak Kumar Singh > Signed-off-by: Vishnu Santhosh > --- > .../devicetree/bindings/net/qcom,bam-dmux.yaml | 36 +++++++++++++++++++++- > 1 file changed, 35 insertions(+), 1 deletion(-) Reviewed-by: Krzysztof Kozlowski Best regards, Krzysztof