From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:38895) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZmqT-0002aq-MB for qemu-devel@nongnu.org; Wed, 09 Sep 2015 17:23:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZZmqO-0004sZ-Lm for qemu-devel@nongnu.org; Wed, 09 Sep 2015 17:23:57 -0400 Received: from mail-ig0-f175.google.com ([209.85.213.175]:36857) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZZmqO-0004sL-Ht for qemu-devel@nongnu.org; Wed, 09 Sep 2015 17:23:52 -0400 Received: by igcrk20 with SMTP id rk20so1141234igc.1 for ; Wed, 09 Sep 2015 14:23:51 -0700 (PDT) References: <1441635826-4866-1-git-send-email-leif.lindholm@linaro.org> <55EE5383.40008@huawei.com> <20150908130438.GL10728@bivouac.eciton.net> <55EFB4C9.7080300@huawei.com> <20150909055213.GA3037@hawk.localdomain> From: Al Stone Message-ID: <55F0A364.1050809@linaro.org> Date: Wed, 9 Sep 2015 15:23:48 -0600 MIME-Version: 1.0 In-Reply-To: <20150909055213.GA3037@hawk.localdomain> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/2] ACPI/arm-virt: add DBG2 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Andrew Jones , Shannon Zhao Cc: peter.maydell@linaro.org, qemu-devel@nongnu.org, Leif Lindholm , shannon.zhao@linaro.org On 09/08/2015 11:52 PM, Andrew Jones wrote: > On Wed, Sep 09, 2015 at 12:25:45PM +0800, Shannon Zhao wrote: >> >> >> On 2015/9/8 21:04, Leif Lindholm wrote: >>> On Tue, Sep 08, 2015 at 11:18:27AM +0800, Shannon Zhao wrote: >>>> On 2015/9/7 22:23, Leif Lindholm wrote: >>>>> The Debug Port Table 2 (DBG2) is mandated by the ARM Server Base Boot >>>>> Requirements specification. Add the DBG2 table definitions, and set up >>>>> an entry in the ARM virt machine for the pl011 UART. >>>> >>>> Looking at Documentation/arm64/acpi_object_usage.txt in Linux kernel, it >>>> says >>>> " >>>> DBG2 Signature Reserved (signature == "DBG2") >>>> == DeBuG port table 2 == >>>> Microsoft only table, will not be supported. >>>> " >>>> It seems that Linux kernel doesn't support or need it, but Windows >>>> requires it. So does it need to test this on Windows? >>> >>> No, it can be tested under Linux with the set I just sent out: >>> http://lists.infradead.org/pipermail/linux-arm-kernel/2015-September/368614.html >> >> So you need to change Documentation/arm64/acpi_object_usage.txt as well. >> But that is kernel side. > > I also wonder if Documentation/arm64/arm-acpi.txt should have its > "Booting using ACPI tables" section updated to reference (describe even?) > the use of SPCR. Maybe Leif's already doing that with the > this-time-really-for-upstream kernel spcr patches. > > drew > It's on my TODO list to update this documentation properly, to include updates on DBG2 and SPCR along with a bunch of other ACPI 6.0 changes. My bad for the delays on this... -- ciao, al ----------------------------------- Al Stone Software Engineer Linaro Enterprise Group al.stone@linaro.org -----------------------------------