From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 512AEC3DA5D for ; Thu, 25 Jul 2024 12:30:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:In-Reply-To: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=GmqP7A+JPqJziazr6AG6F2fPGPMKo7eb6D/y7TyUksU=; b=IZpjz+v70W7Omm8sYrPBp0bjFe Xoz96R33W/gSLpTM3FNJOuwf7UKZF7+xykLvEOtkQAgBXx1QjdPbk+3CzZTbnBjfxumy7HGq9ea4X nVCUGlTA8E7kZOL25bJAijMlcPRQqbnQRq0PRgS7FKjRf2yET3/ycliQQrKCgTUUq1bbth3ud4iAh 4uvd86Gp7LOdRwA3PWc/6Wl9mnisZZysfCDnM+E6XXPLIPtC67qbzs674MpPQXGe7hc0n9IxiEusi SHy30BfDjv87BTo+CxwuojsvQFpUKFWroeKpNGuOMHJISDFQG/OZCnlVoqCvXZaIhdYYXqHYCJbc1 2RAVYoTw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sWxbh-00000000vr3-3xXF; Thu, 25 Jul 2024 12:30:05 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sWxbJ-00000000vkL-1Vl2 for linux-arm-kernel@lists.infradead.org; Thu, 25 Jul 2024 12:29:43 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1721910580; 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=GmqP7A+JPqJziazr6AG6F2fPGPMKo7eb6D/y7TyUksU=; b=iY2hGiJMegGYi1tgITFilEuNCyQ9dadErA8+BSvpOJsV4n5IM/1X9ioSO1HFszmeoe+FsP +4t5sH32FNf+7H7arjaj19g8xoEX9IOC/VDOUfnUdVKggRGtKHOZ6XUJXGwpNn9aVsocRL OzI36+BnpUeWf7tq1e9oY/7SxSTguP0= Received: from mail-ed1-f70.google.com (mail-ed1-f70.google.com [209.85.208.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-363-omMT79ezPRqfezyWusGQVQ-1; Thu, 25 Jul 2024 08:29:38 -0400 X-MC-Unique: omMT79ezPRqfezyWusGQVQ-1 Received: by mail-ed1-f70.google.com with SMTP id 4fb4d7f45d1cf-5a2ceb035f9so1311248a12.0 for ; Thu, 25 Jul 2024 05:29:38 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1721910577; x=1722515377; 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=GmqP7A+JPqJziazr6AG6F2fPGPMKo7eb6D/y7TyUksU=; b=Z4QUeLCT2O7Pb3EgSWC8wfJZLx17WJHs8EmKlN6QCdhZKStu4zKWjB28ruABjTiVfY NGV8ch4HnPRvRobowYOx9PVm8qANO82zOraijfXV2eOc4vRfa2eT9Cnv23IKoaZMeCPo gmJoEgrxP8OonPz1/2kMAvRxtfMuCs/8rL3a+kIDB32Us9v9YvYeJmtpbBYfCXRgTQQ6 +Z3o55GOAy7R+JmBahzoT8xZG220YxIgN7kbWW6YJjxRAXtTJxtNwQ/gzGJsWkFMcdDx LOZTxvmtqzxtw30QJHTX+dWHduFZDrJRZ8C3kndZNteArhxmLP9LyOZYMU/+t48httQk JjDw== X-Forwarded-Encrypted: i=1; AJvYcCX4UhUP/4u7ndvq0E/XAisH5TuXfkXCXKRMTZydTtcw54fBpZ06g2TYJG6PqLKbR9Im73nY4D3KuNxcs+esgCNmXuuofbAeXsQMUUbOygfCvlw38CE= X-Gm-Message-State: AOJu0YyQlUl7LpBQKiDGakXdurbB20nbH6qkhbobgZX6lwYFmY6hjFpT nEN8aHjIJzsZ33StLQTvWeIONWQXNHoTNzURz+fT+sI6+6HL5fLo/2eiZIjeT5Dvw3PngaFtljv HlvQ6wyzepxkZamf9mRWsp7sQw7BZh3Hq0ezL12Ol35r0Q1+2xFodMK/QsiWrCPRh24jwOmat X-Received: by 2002:a50:baa3:0:b0:58c:10fd:5082 with SMTP id 4fb4d7f45d1cf-5ab1a7af0f3mr5616874a12.10.1721910577494; Thu, 25 Jul 2024 05:29:37 -0700 (PDT) X-Google-Smtp-Source: AGHT+IESzTf1Dq4jXq+lb4GZ/ln7u62lD42/qJf2maAOGtbm2TYn0twTp0kEGmFg6gBHrHiC+FsesQ== X-Received: by 2002:a50:baa3:0:b0:58c:10fd:5082 with SMTP id 4fb4d7f45d1cf-5ab1a7af0f3mr5616818a12.10.1721910576749; Thu, 25 Jul 2024 05:29:36 -0700 (PDT) Received: from redhat.com ([2a02:14f:1ec:81aa:776c:8849:e578:516a]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5ac64eb3becsm768874a12.74.2024.07.25.05.29.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 25 Jul 2024 05:29:36 -0700 (PDT) Date: Thu, 25 Jul 2024 08:29:31 -0400 From: "Michael S. Tsirkin" To: David Woodhouse Cc: Richard Cochran , Peter Hilber , linux-kernel@vger.kernel.org, virtualization@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-rtc@vger.kernel.org, "Ridoux, Julien" , virtio-dev@lists.linux.dev, "Luu, Ryan" , "Chashper, David" , "Mohamed Abuelfotoh, Hazem" , "Christopher S . Hall" , Jason Wang , John Stultz , netdev@vger.kernel.org, Stephen Boyd , Thomas Gleixner , Xuan Zhuo , Marc Zyngier , Mark Rutland , Daniel Lezcano , Alessandro Zummo , Alexandre Belloni , qemu-devel , Simon Horman Subject: Re: [PATCH] ptp: Add vDSO-style vmclock support Message-ID: <20240725082828-mutt-send-email-mst@kernel.org> References: <14d1626bc9ddae9d8ad19d3c508538d10f5a8e44.camel@infradead.org> <20240725012730-mutt-send-email-mst@kernel.org> <7de7da1122e61f8c64bbaab04a35af93fafac454.camel@infradead.org> <20240725081502-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 In-Reply-To: X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240725_052941_494126_FAAF831F X-CRM114-Status: GOOD ( 19.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jul 25, 2024 at 01:27:49PM +0100, David Woodhouse wrote: > On Thu, 2024-07-25 at 08:17 -0400, Michael S. Tsirkin wrote: > > On Thu, Jul 25, 2024 at 10:56:05AM +0100, David Woodhouse wrote: > > > > Do you want to just help complete virtio-rtc then? Would be easier than > > > > trying to keep two specs in sync. > > > > > > The ACPI version is much more lightweight and doesn't take up a > > > valuable PCI slot#. (I know, you can do virtio without PCI but that's > > > complex in other ways). > > > > > > > Hmm, should we support virtio over ACPI? Just asking. > > Given that we support virtio DT bindings, and the ACPI "PRP0001" device > exists with a DSM method which literally returns DT properties, > including such properties as "compatible=virtio,mmio" ... do we > already? > > In a sense, but you are saying that is too complex? Can you elaborate? -- MST