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[82.27.104.80]) by smtp.gmail.com with ESMTPSA id b4sm17758251wro.57.2020.11.03.03.23.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 03 Nov 2020 03:23:41 -0800 (PST) Date: Tue, 3 Nov 2020 11:23:39 +0000 From: Leif Lindholm To: Alex =?iso-8859-1?Q?Benn=E9e?= Subject: Re: [RFC PATCH] docs: add some notes on the sbsa-ref machine Message-ID: <20201103112339.GP1664@vanye> References: <20201103104710.27150-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20201103104710.27150-1-alex.bennee@linaro.org> User-Agent: Mutt/1.10.1 (2018-07-13) Received-SPF: pass client-ip=2a00:1450:4864:20::343; envelope-from=leif@nuviainc.com; helo=mail-wm1-x343.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, WEIRD_QUOTING=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Graeme Gregory , Hongbo Zhang , Peter Maydell , Shashi Mallela , qemu-devel@nongnu.org, "open list:ARM TCG CPUs" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Nov 03, 2020 at 10:47:10 +0000, Alex Bennée wrote: > We should at least document what this machine is about. Thanks! (comments below) > Cc: Graeme Gregory > Cc: Leif Lindholm > Cc: Hongbo Zhang > Cc: Shashi Mallela > Signed-off-by: Alex Bennée > --- > docs/system/arm/sbsa.rst | 30 ++++++++++++++++++++++++++++++ > docs/system/target-arm.rst | 1 + > 2 files changed, 31 insertions(+) > create mode 100644 docs/system/arm/sbsa.rst > > diff --git a/docs/system/arm/sbsa.rst b/docs/system/arm/sbsa.rst > new file mode 100644 > index 0000000000..a47c9360de > --- /dev/null > +++ b/docs/system/arm/sbsa.rst > @@ -0,0 +1,30 @@ > +Arm Server Base System Architecture Reference board (``sbsa-ref``) > +================================================================== > + > +While the `virt` board is a generic board platform that doesn't match > +any real hardware the `sbsa-ref` board intends to look like real > +hardware. The `Server Base System Architecture > +` defines a > +minimum base line of hardware support and importantly how the firmware > +reports that to any operating system. It is a static system that > +reports a very minimal DT to the firmware for command line input to > +the firmware. I think you mean the right thing, but ... "a very minimal DT to the firmware for non-discoverable information about components affected by the qemu command line" (i.e. cpus and memory) > As a result it must have a firmware specifically built > +to expect a certain hardware layout (as you would in a real machine). > + > +It is intended to be a machine for developing firmware and testing > +standards compliance with operating systems. > + > +Supported devices > +""""""""""""""""" > + > +The sbsa-ref board supports: > + > + - A configurable number of Cortex-A57 cpus > + - GIC version 3 The intent was always for sbsa-ref to be tracking SBSA development, so I wonder whether we should be documenting specific versions of cpu and gic (and then keep remembering to update the docs). My short-term plan was to swap the a57 for "max", but documentation-wise, could we just say "number of aarch64 cpus"? Could we refer to the gic as "latest supported emulated"? / Leif > + - System bus AHCI controller. > + - System bus EHCI controller. > + - CDROM and hard disc on AHCI bus. > + - E1000E ethernet card on PCIE bus. > + - VGA display adaptor on PCIE bus. > + - A generic SBSA watchdog device > + > diff --git a/docs/system/target-arm.rst b/docs/system/target-arm.rst > index fdcf25c237..9636f3fd00 100644 > --- a/docs/system/target-arm.rst > +++ b/docs/system/target-arm.rst > @@ -79,6 +79,7 @@ undocumented; you can get a complete list by running > arm/mps2 > arm/musca > arm/realview > + arm/sbsa-ref > arm/versatile > arm/vexpress > arm/aspeed > -- > 2.20.1 >