From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 6659D2033F for ; Mon, 26 Feb 2024 11:37:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708947429; cv=none; b=C8TOkfIDO7gBA/FHQr6T4nNyvc0ZdcjwCV+XgbiFS/6XjNx0WvVMYSoOO7J9hCao1us7Ea4YON3UDwmx99MRTHqLrI3ik2Ceh+IsICworRVBP4JjJb7GfskFnXuU52fxW7wDvzpaJpt/jONGNISu7ICx03YjwIAEy8f9chqsz1I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708947429; c=relaxed/simple; bh=cdvsXEAAdJFQk8TvtsGZXJF3H+eh0FsJmmxlLLI+i6o=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: In-Reply-To:Content-Type:Content-Disposition; b=IZzSPOW6e1RyRjMpQj8wFGYqblMPbB30xQPTAuBPl96Tch1Wes7pMinRao9yNT/2XpbStUxIfyDoTnN8uwpqsJ5H33XKu76yF9PQdRarzF0NJerKCCTeFkim4wz1TguANGEpYd0aeiP83VbEmgNeo74wBtGnwYDHNGwV1XT0CH0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=RoAx/rLR; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="RoAx/rLR" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1708947426; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=DAlQVG6KdPaJyAOPbLA/63jFXJlJW1va0BU08U9am/8=; b=RoAx/rLRCreDW27L2NDJvmMlAkcrT5eR4hZ668uFv6h5g9U87oNTL9nmgxOn8fjRbjuRT+ Z1bGiRnxlkQSLep/qiVVtgNyKvy0WUv5M9UJpi0DeqDCjLvwMrtlezN3aIpkNJUnuACGc4 07O4GAEWWE4DXrjPLEtg6sHiBcwz2Ds= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-220-D__BzV-GNHeVtBtxfJrEqg-1; Mon, 26 Feb 2024 06:37:04 -0500 X-MC-Unique: D__BzV-GNHeVtBtxfJrEqg-1 Received: by mail-wm1-f70.google.com with SMTP id 5b1f17b1804b1-4128defb707so14825945e9.0 for ; Mon, 26 Feb 2024 03:37:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708947423; x=1709552223; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=DAlQVG6KdPaJyAOPbLA/63jFXJlJW1va0BU08U9am/8=; b=U07nlDvG8kKvgZlMTksinKu6zbe82mL3cssM459JXAphrh7VbLJPGx5UB3YtQxsYwm vC3Gadrt7VhdA5fHYiAqShWZOXVSoigTBlCPQJ4JbLSey+77g3UTeUUTpzV5jroo8W0b gnVQ8sW09cbY6UwJ7RulyajHgRa6YI1//lUEgWy5WmIxanhEHJtI+qmliQQPUDDOZ1Iu cuylK7xgZ1O3uQIQHL9UU2NRFuwYKaddJyD32+/ndtavrYJFlT+ma6laB5TfU7iZLIld sCVr4D90wLtyoQv3DaLa4T8ZMcqDvSpl9BPWRJksuW2N+Js478SfFXa29t2CBz7O/Cwb HpdA== X-Gm-Message-State: AOJu0YyNIcxwOT7/BXG3KOLQ8z0RSXQWZ46cLX5ZvCwbbNN/jGUAKDiD QBNx2JknSm02k8113pI06JpBq7ulnfcAJyJICvuN/wOcG8FLzXJnWI7G01VlwXNs+IBH4m8lm4O uIHB3LOF7EabgUbjcsO6yf4kig3GQ54RBfaT65dLc53OvPRja6uk9tUWNu9Jlg/4D X-Received: by 2002:a05:600c:1d82:b0:412:a8d1:d3b6 with SMTP id p2-20020a05600c1d8200b00412a8d1d3b6mr379097wms.8.1708947423794; Mon, 26 Feb 2024 03:37:03 -0800 (PST) X-Google-Smtp-Source: AGHT+IHvXe87LdVjv57x0ixL/iOJ9+IQcZQwZBW2BhhDacRcGH/iDCk0HMP0COfYaRJOaDiHQGYMqw== X-Received: by 2002:a05:600c:1d82:b0:412:a8d1:d3b6 with SMTP id p2-20020a05600c1d8200b00412a8d1d3b6mr379072wms.8.1708947423449; Mon, 26 Feb 2024 03:37:03 -0800 (PST) Received: from redhat.com ([109.253.193.52]) by smtp.gmail.com with ESMTPSA id t20-20020adfa2d4000000b0033de1e1bddcsm1319266wra.26.2024.02.26.03.36.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Feb 2024 03:37:02 -0800 (PST) Date: Mon, 26 Feb 2024 06:36:53 -0500 From: "Michael S. Tsirkin" To: Xuan Zhuo Cc: virtualization@lists.linux.dev, Richard Weinberger , Anton Ivanov , Johannes Berg , Jason Wang , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Hans de Goede , Ilpo =?iso-8859-1?Q?J=E4rvinen?= , Vadim Pasternak , Bjorn Andersson , Mathieu Poirier , Cornelia Huck , Halil Pasic , Eric Farman , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Alexei Starovoitov , Daniel Borkmann , Jesper Dangaard Brouer , John Fastabend , linux-um@lists.infradead.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-s390@vger.kernel.org, kvm@vger.kernel.org, bpf@vger.kernel.org, Christoph Hellwig Subject: Re: [PATCH vhost v2 19/19] virtio_net: sq support premapped mode Message-ID: <20240226063532-mutt-send-email-mst@kernel.org> References: <20240223082726.52915-1-xuanzhuo@linux.alibaba.com> <20240223082726.52915-20-xuanzhuo@linux.alibaba.com> <20240225032330-mutt-send-email-mst@kernel.org> <1708946440.799724-1-xuanzhuo@linux.alibaba.com> <20240226063120-mutt-send-email-mst@kernel.org> <1708947209.1148863-1-xuanzhuo@linux.alibaba.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <1708947209.1148863-1-xuanzhuo@linux.alibaba.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Mon, Feb 26, 2024 at 07:33:29PM +0800, Xuan Zhuo wrote: > > what is dma_map_direct? can't find it in the tree. > > YES. > > > diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c > index 58db8fd70471..5a8f7a927aa1 100644 > --- a/kernel/dma/mapping.c > +++ b/kernel/dma/mapping.c > @@ -144,6 +144,18 @@ static inline bool dma_map_direct(struct device *dev, > return dma_go_direct(dev, *dev->dma_mask, ops); > } > > +bool dma_is_direct(struct device *dev) > +{ > + if (!dma_map_direct(dev, ops)) > + return false; > + > + if (is_swiotlb_force_bounce(dev)) > + return false; > + > + return true; > +} > +EXPORT_SYMBOL(dma_unmap_page_attrs); > + > > Thanks. where is it? linux-next? -- MST