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From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Laszlo Ersek <lersek@redhat.com>,
	Shannon Zhao <zhaoshenglong@huawei.com>,
	qemu-arm <qemu-arm@nongnu.org>,
	QEMU Developers <qemu-devel@nongnu.org>,
	"Jason A . Donenfeld" <Jason@zx2c4.com>,
	Drew Jones <drjones@redhat.com>,
	Andrea Bolognani <abologna@redhat.com>
Subject: Re: [Qemu-devel] [PATCH 3/3] hw/arm/virt-acpi-build: Add second UART to ACPI tables
Date: Tue, 12 Dec 2017 14:12:34 +0000	[thread overview]
Message-ID: <CAKv+Gu_mzynBKSBSdtUhKRgNd3KmuJTwiNZpmvPCfkRDo_QCgA@mail.gmail.com> (raw)
In-Reply-To: <CAFEAcA9JzK8sNF5TmENfXZ-NBJwfp03b2La4YQ=N2i1ZCzrNBw@mail.gmail.com>

On 12 December 2017 at 14:10, Peter Maydell <peter.maydell@linaro.org> wrote:
> On 12 December 2017 at 13:56, Ard Biesheuvel <ard.biesheuvel@linaro.org> wrote:
>> Given that the DEBUG output is only produced on DEBUG builds, couldn't
>> we simply stipulate that DEBUG output appears on the PL011 with the
>> lowest physical address? That keeps the current status quo, and is
>> probably sufficient for 99% of the use cases of people using the DEBUG
>> builds.
>>
>> Then, we can introduce some code to decode stdout-path in FdtClientDxe
>> (a higher level DT parsing driver) so that the actual serial console
>> gets installed onto whichever UART is described as the system console.
>> Also, given that ArmVirtQemu is tightly coupled to QEMU/mach-virt, we
>> could decide to only use node names in stdout-path (as we do
>> currently) to simplify the parsing logic.
>
> That doesn't actually usefully separate debug output from the
> console, though, because stdout-path is also going to point
> to the UART with the lowest physical address...
>

By default, yes, just like is currently the case. But I would assume
this new serial port could be appointed 'console' and put into
stdout-path by QEMU, based on the command line options?

  reply	other threads:[~2017-12-12 14:12 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-08 15:02 [Qemu-devel] [PATCH 0/3] hw/arm/virt: Add another UART Peter Maydell
2017-12-08 15:02 ` [Qemu-devel] [PATCH 1/3] hw/arm/virt: Add virt-2.12 machine type Peter Maydell
2017-12-12 14:39   ` Andrew Jones
2018-01-15 12:00     ` Peter Maydell
2017-12-08 15:02 ` [Qemu-devel] [PATCH 2/3] hw/arm/virt: Add another UART to the virt board Peter Maydell
2017-12-12  5:55   ` Shannon Zhao
2017-12-12 10:45     ` Peter Maydell
2017-12-12 14:25       ` Jason A. Donenfeld
2017-12-12 14:45   ` Andrew Jones
2017-12-12 14:50     ` Peter Maydell
2017-12-12 15:16       ` Andrew Jones
2017-12-12 15:51         ` Peter Maydell
2018-05-31  2:12           ` Jason A. Donenfeld
2018-05-31  8:32             ` Peter Maydell
2018-05-31 11:48               ` Jason A. Donenfeld
2018-05-31 11:57                 ` Peter Maydell
2017-12-12 15:16   ` Andrew Jones
2017-12-08 15:02 ` [Qemu-devel] [PATCH 3/3] hw/arm/virt-acpi-build: Add second UART to ACPI tables Peter Maydell
2017-12-12  5:53   ` Shannon Zhao
2017-12-12 11:06     ` Laszlo Ersek
2017-12-12 11:11       ` Peter Maydell
2017-12-12 11:33         ` Laszlo Ersek
2017-12-12 11:44           ` Ard Biesheuvel
2017-12-12 11:59             ` Laszlo Ersek
2017-12-12 12:07               ` Peter Maydell
2017-12-12 12:41                 ` Laszlo Ersek
2017-12-12 12:47                   ` Peter Maydell
2017-12-12 13:28                     ` Laszlo Ersek
2017-12-12 13:56                       ` Ard Biesheuvel
2017-12-12 14:10                         ` Peter Maydell
2017-12-12 14:12                           ` Ard Biesheuvel [this message]
2017-12-12 14:13                             ` Peter Maydell
2017-12-12 14:16                               ` Ard Biesheuvel
2017-12-12 14:17                                 ` Peter Maydell
2017-12-12 14:31                                   ` Ard Biesheuvel
2017-12-12 14:51                                     ` Andrew Jones
2017-12-12 16:38                                       ` Laszlo Ersek
2017-12-12 14:18                         ` Andrew Jones
2017-12-12 14:10                       ` Andrew Jones
2017-12-12 15:09       ` Andrew Jones
2017-12-13 13:56       ` Peter Maydell
2017-12-13 16:01         ` Laszlo Ersek
2017-12-13 16:46           ` Ard Biesheuvel
2017-12-13 16:48             ` Peter Maydell
2017-12-08 15:10 ` [Qemu-devel] [Qemu-arm] [PATCH 0/3] hw/arm/virt: Add another UART Peter Maydell

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