From: Greg KH <gregkh@linuxfoundation.org>
To: Benjamin GAIGNARD <benjamin.gaignard@st.com>
Cc: Linus Walleij <linus.walleij@linaro.org>,
"robh@kernel.org" <robh@kernel.org>,
Loic PALLARDY <loic.pallardy@st.com>,
"arnd@arndb.de" <arnd@arndb.de>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"system-dt@lists.openampproject.org"
<system-dt@lists.openampproject.org>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"lkml@metux.net" <lkml@metux.net>,
"linux-imx@nxp.com" <linux-imx@nxp.com>,
"kernel@pengutronix.de" <kernel@pengutronix.de>,
"sudeep.holla@arm.com" <sudeep.holla@arm.com>,
"fabio.estevam@nxp.com" <fabio.estevam@nxp.com>,
"stefano.stabellini@xilinx.com" <stefano.stabellini@xilinx.com>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v2 2/7] bus: Introduce firewall controller framework
Date: Fri, 31 Jan 2020 10:06:50 +0100 [thread overview]
Message-ID: <20200131090650.GA2267325@kroah.com> (raw)
In-Reply-To: <0b109c05-24cf-a1c4-6072-9af8a61f45b2@st.com>
On Fri, Jan 31, 2020 at 08:37:27AM +0000, Benjamin GAIGNARD wrote:
>
> On 1/29/20 12:17 PM, Mark Brown wrote:
> > On Wed, Jan 29, 2020 at 10:52:40AM +0100, Greg KH wrote:
> >
> >> It just needs to be part of the bus logic for the specific bus that this
> >> "firewall" is on. Just like we do the same thing for USB or thunderbolt
> >> devices. Put this in the bus-specific code please.
> > I'd expect that this is going to affect at least platform and AMBA
> > buses.
>
> Correct me if I'm wrong but creating a new type of bus would mean
> that all the drivers living on this bus must be changed to register
> themselves on this bus ?
Yes.
> Or does a solution exist to let them live on the platform bus and call
> firewalled bus before been probed ?
Why do people want to abuse the platform bus so much? If a device is on
a bus that can have such a controller, then it is on a real bus, use it!
> All the impacted drivers could work on the existing bus with or without
> the firewall so I don't want to break
break what?
>
> that.
Odd line-break :)
Just register the driver on both busses, no big deal.
Stop abusing the platform bus code for things that it is not for.
thanks,
greg k-h
next prev parent reply other threads:[~2020-01-31 9:06 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-28 15:37 [PATCH v2 0/7] Introduce bus firewall controller framework Benjamin Gaignard
2020-01-28 15:38 ` [PATCH v2 1/7] dt-bindings: bus: Add firewall bindings Benjamin Gaignard
2020-01-28 15:38 ` [PATCH v2 2/7] bus: Introduce firewall controller framework Benjamin Gaignard
2020-01-28 15:52 ` Greg KH
2020-01-28 16:41 ` Benjamin GAIGNARD
2020-01-28 16:57 ` Greg KH
2020-01-28 20:29 ` Benjamin GAIGNARD
2020-01-29 5:49 ` Greg KH
2020-01-29 9:42 ` Linus Walleij
2020-01-29 9:52 ` Greg KH
2020-01-29 11:17 ` Mark Brown
2020-01-31 8:37 ` Benjamin GAIGNARD
2020-01-31 9:06 ` Greg KH [this message]
2020-02-14 16:05 ` Linus Walleij
2020-02-14 21:40 ` Greg KH
2020-02-15 12:41 ` Benjamin GAIGNARD
2020-02-16 7:21 ` Greg KH
2020-01-28 15:38 ` [PATCH v2 3/7] base: Add calls to firewall controller Benjamin Gaignard
2020-01-28 15:38 ` [PATCH v2 4/7] dt-bindings: bus: Add STM32 ETZPC " Benjamin Gaignard
2020-01-28 15:38 ` [PATCH v2 5/7] bus: firewall: Add driver for STM32 ETZPC controller Benjamin Gaignard
2020-01-28 15:38 ` [PATCH v2 6/7] ARM: dts: stm32: Add firewall node for stm32mp157 SoC Benjamin Gaignard
2020-01-28 15:38 ` [PATCH v2 7/7] ARM: dts: stm32: enable firewall controller node on stm32mp157c-ed1 Benjamin Gaignard
2020-01-28 16:36 ` [PATCH v2 0/7] Introduce bus firewall controller framework Sudeep Holla
2020-01-28 16:46 ` Benjamin GAIGNARD
2020-01-28 17:17 ` Sudeep Holla
2020-01-28 20:06 ` Benjamin GAIGNARD
2020-01-28 22:06 ` Robin Murphy
2020-01-29 13:40 ` Benjamin GAIGNARD
2020-01-31 18:25 ` Robin Murphy
2020-02-03 13:16 ` Benjamin GAIGNARD
2020-01-31 20:51 ` Florian Fainelli
2020-02-03 13:41 ` Benjamin GAIGNARD
2020-01-31 20:48 ` Florian Fainelli
2020-02-02 12:23 ` Mark Brown
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