From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Elliot Berman <quic_eberman@quicinc.com>
Cc: Bjorn Andersson <quic_bjorande@quicinc.com>,
Jiri Slaby <jirislaby@kernel.org>,
Murali Nalajala <quic_mnalajal@quicinc.com>,
Trilok Soni <quic_tsoni@quicinc.com>,
Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
Carl van Schaik <quic_cvanscha@quicinc.com>,
Andy Gross <agross@kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Jassi Brar <jassisinghbrar@gmail.com>,
linux-arm-kernel@lists.infradead.org,
Mark Rutland <mark.rutland@arm.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Sudeep Holla <sudeep.holla@arm.com>,
Marc Zyngier <maz@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Jonathan Corbet <corbet@lwn.net>, Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
devicetree@vger.kernel.org, linux-doc@vger.kernel.org,
linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 14/14] tty: gunyah: Add tty console driver for RM Console Services
Date: Fri, 7 Oct 2022 09:40:52 +0200 [thread overview]
Message-ID: <Yz/YBDqqwBUlswgX@kroah.com> (raw)
In-Reply-To: <14d0ff9f-60f3-71cc-ea42-ceee389298ac@quicinc.com>
On Thu, Oct 06, 2022 at 10:59:51PM -0700, Elliot Berman wrote:
> > > + */
> > > +#define RSC_MGR_TTY_ADAPTERS 16
> >
> > We can have dynamic tty devices, so I don't understand this comment.
> > What really is the problem here?
> >
>
> Yes, I see the confusion. Dynamic device addition of tty devices is
> supported. As I understand, you need to know the maximum number of lines
> that could be added, and that is limitation I was referring to.
What do you mean by "lines"? That's not a tty kernel term.
> Is this comment better?
>
> The Linux TTY code requires us to know ahead of time how many lines we
> might need. Each line here corresponds to a VM. 16 seems like a
> reasonable number of lines for systems that are running Gunyah and using
> the provided console interface.
Again, line? Do you mean port?
> > > + cons_data->tty_driver->driver_name = "gh";
KBUILD_MODNAME?
> > > + cons_data->tty_driver->name = "ttyGH";
> >
> > Where did you pick this name from?
> >
> > Where is it documented?
> >
>
> "GH" is the shorthand we've been using for "Gunyah". I didn't find
> documentation for dynamically assigned char devices, but if it exists, I can
> add entry for ttyGH.
Why use a new name at all? Why not stick with the existing tty names
and device numbers?
thanks,
greg k-h
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next prev parent reply other threads:[~2022-10-07 7:41 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-28 19:56 [PATCH v4 00/14] Drivers for gunyah hypervisor Elliot Berman
2022-09-28 19:56 ` [PATCH v4 01/14] docs: gunyah: Introduce Gunyah Hypervisor Elliot Berman
2022-09-29 3:43 ` Bagas Sanjaya
2022-09-29 4:02 ` Elliot Berman
2022-09-28 19:56 ` [PATCH v4 02/14] dt-bindings: Add binding for gunyah hypervisor Elliot Berman
2022-09-28 19:56 ` [PATCH v4 03/14] gunyah: Common types and error codes for Gunyah hypercalls Elliot Berman
2022-09-28 19:56 ` [PATCH v4 04/14] arm64: smccc: Include alternative-macros.h Elliot Berman
2022-09-28 19:56 ` [PATCH v4 05/14] virt: gunyah: Add hypercalls to identify Gunyah Elliot Berman
2022-09-28 19:56 ` [PATCH v4 06/14] virt: gunyah: Add sysfs nodes Elliot Berman
2022-09-30 12:09 ` Greg Kroah-Hartman
2022-10-04 23:50 ` Elliot Berman
2022-10-05 6:23 ` Greg Kroah-Hartman
2022-09-28 19:56 ` [PATCH v4 07/14] mailbox: Allow direct registration to a channel Elliot Berman
2022-09-28 19:56 ` [PATCH v4 08/14] virt: gunyah: msgq: Add hypercalls to send and receive messages Elliot Berman
2022-09-28 19:56 ` [PATCH v4 09/14] mailbox: Add Gunyah message queue mailbox Elliot Berman
2022-09-29 16:59 ` Bjorn Andersson
2022-09-29 17:37 ` Jassi Brar
2022-09-28 19:56 ` [PATCH v4 10/14] gunyah: sysfs: Add node to describe supported features Elliot Berman
2022-09-29 7:36 ` Joe Perches
2022-09-29 20:47 ` Elliot Berman
2022-10-02 23:30 ` Jeff Johnson
2022-10-02 23:58 ` Joe Perches
2022-09-30 12:06 ` Greg Kroah-Hartman
2022-10-04 23:53 ` Elliot Berman
2022-09-28 19:56 ` [PATCH v4 11/14] gunyah: rsc_mgr: Add resource manager RPC core Elliot Berman
2022-09-28 19:56 ` [PATCH v4 12/14] gunyah: rsc_mgr: Add RPC for console services Elliot Berman
2022-09-30 12:22 ` Greg Kroah-Hartman
2022-10-03 1:46 ` new checkpatch flexible array test ? (was Re: [PATCH v4 12/14] gunyah: rsc_mgr: Add RPC for console services) Joe Perches
2022-10-03 5:29 ` Greg Kroah-Hartman
2022-10-03 5:38 ` Joe Perches
2022-10-31 18:23 ` Gustavo A. R. Silva
2022-09-28 19:56 ` [PATCH v4 13/14] gunyah: rsc_mgr: Add auxiliary devices for console Elliot Berman
2022-09-30 12:19 ` Greg Kroah-Hartman
2022-10-04 23:49 ` Elliot Berman
2022-10-05 6:21 ` Greg Kroah-Hartman
2022-10-05 21:47 ` Elliot Berman
2022-10-06 6:28 ` Greg Kroah-Hartman
2022-09-28 19:56 ` [PATCH v4 14/14] tty: gunyah: Add tty console driver for RM Console Services Elliot Berman
2022-09-30 12:17 ` Greg Kroah-Hartman
2022-10-07 5:59 ` Elliot Berman
2022-10-07 7:40 ` Greg Kroah-Hartman [this message]
2022-10-09 20:59 ` Elliot Berman
2022-10-10 20:23 ` Greg Kroah-Hartman
2022-10-10 20:58 ` Elliot Berman
2022-10-11 6:22 ` Greg Kroah-Hartman
2022-10-11 22:04 ` Elliot Berman
2022-10-12 6:53 ` Greg Kroah-Hartman
2022-10-08 7:41 ` Zhou Furong
2022-10-08 9:52 ` Greg Kroah-Hartman
2022-10-03 7:01 ` Jiri Slaby
2022-10-10 18:06 ` Elliot Berman
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