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 EC4E81991DC for ; Thu, 25 Jul 2024 12:29:40 +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=1721910582; cv=none; b=tkyiyz3XBRfbE8m8qY5FPNXulSS9tcebQOG5GgchR+b2bWtT+1YvmIrykWDix0BLfPgwcL/pIfLilOXWXRceH76xWbZ5h1npFztrzxds34+NqxMq1kss5+tANKqjZ6TbIdcV2pnv+0j2jWtRDX5ozF0rtuSeSeyeHmkRsya5+HA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721910582; c=relaxed/simple; bh=1x+MRrK/gKvb0AP5m2fDvNNFyowu/Kb6wBFKgceGBH0=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: In-Reply-To:Content-Type:Content-Disposition; b=WRumRIHXOMNs79jJj2CT+V8vd0CQI/7mGLFdspYbVMWpBjBSRnqoaEupl7OOLsQxbc7gzHRrCPTt5C0NTThhsKy6znAtmGvCAWWjUxGVyhR0q9L9k0jj/5nqEi4TGhwYOX4R7NSI2CGyJxBGlKqTUJPZOZdm5N7tMW3793zxqtI= 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=iY2hGiJM; 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="iY2hGiJM" 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-444-upnPWG8gOPK7GEc2PKH1qw-1; Thu, 25 Jul 2024 08:29:38 -0400 X-MC-Unique: upnPWG8gOPK7GEc2PKH1qw-1 Received: by mail-ed1-f70.google.com with SMTP id 4fb4d7f45d1cf-5a8b0832defso1392042a12.1 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=krBdfADaxXmaemkfSxldW6i5Vm0TCVKmA5byLXtK5KvfxBv+Ru9Ri+neC3QUZCnGp+ 1qynf+wKbQTz+ieCLBaNmZrEEh2alyJ7rgEEJ2JuqbL8zvlkSEyimN5kCpeMXiqUlqDB /1r8mtlTzaHIJq27dmsP4pgOCBmzujfvVG/3HMU4/r/Z6X7VaM84KSR6R3R/KBoVed+X lsYGXB5pTxZ64CPkl9Vp8mgZidBXJ9p4RxlNlZI4Xr410pQAgbMZ4GCWJow6jL9dF5Gn MdWrvrGT1BPoYdJSIAe3YttgiHQgtho0gfWQI944aYXJUHN8viKOYlXJeh0MqYzO2RbW XWNA== X-Forwarded-Encrypted: i=1; AJvYcCX4nF1CWQucpAqRyNSb2XPTwMPzwXg9q4dV8UsZnmUoltaBUrG7VpfGuK7Ff1TDw1+zxr0qpkxZnQ2eYoVx511yCZkfoufxyMfBFzYsUa4= X-Gm-Message-State: AOJu0YxgE3MAKXf1St/N+EoeQBTfB54FKLW6JybnKStsDH/CrYv1g6Zv Kbxy7rkA2Lc4Dgu5XGONodtaJw4Tfk4gylNqqnkmYnW92yoRMj3hYJo74lmLk4FH14hRrlHqrmO KQ91CxH1wHWX/MsjRQURlG1/ahosf8x6KaUAS29XTqq4AERgueYjzEwc415HleesS X-Received: by 2002:a50:baa3:0:b0:58c:10fd:5082 with SMTP id 4fb4d7f45d1cf-5ab1a7af0f3mr5616850a12.10.1721910577476; 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> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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 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