From: Sudeep Holla <sudeep.holla@arm.com>
To: Jolly Shah <JOLLYS@xilinx.com>
Cc: Sudeep Holla <sudeep.holla@arm.com>,
"gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"matt@codeblueprint.co.uk" <matt@codeblueprint.co.uk>,
"hkallweit1@gmail.com" <hkallweit1@gmail.com>,
"michal.simek@xilinx.com" <michal.simek@xilinx.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"ard.biesheuvel@linaro.org" <ard.biesheuvel@linaro.org>,
"mingo@kernel.org" <mingo@kernel.org>,
"keescook@chromium.org" <keescook@chromium.org>,
"dmitry.torokhov@gmail.com" <dmitry.torokhov@gmail.com>,
Rajan Vaja <RAJANV@xilinx.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Subject: Re: [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP firmware
Date: Tue, 13 Mar 2018 10:16:03 +0000 [thread overview]
Message-ID: <755770ba-d110-8b2e-3c1f-9b65686dc51f@arm.com> (raw)
In-Reply-To: <DM2PR0201MB07678A47B5380DC14E6F6126B8D30@DM2PR0201MB0767.namprd02.prod.outlook.com>
On 12/03/18 23:07, Jolly Shah wrote:
> Hi Sudeep,
>>>> Do you foresee using SMC/HVC for this firmware even on future platforms?
>>>> If not, I suggest to keep the protocol part separate from the transport i.e.
>>>> smc/hvc via ATF. It could be replaced with mailbox or some h/w
>>>> mechanism in future ?
>>>>
>>>
>>> We have PSCI and EEMI interfaces exposed to linux from ATF. PSCI is an
>>> EEMI client. We do not have current plans to switch to mailbox as it
>>> will require 2 communication channels to PMU as PSCI is through ATF.
>>>
>>
>> OK, but I just saw some bindings that has mailbox interface, honestly it's getting
>> too confusing with multiple series on the same thing floating and hence I
>> requested to put it together as one series.
>
> Mailbox binding is used for power management driver. Mailbox is only
> used for PMU->APU communication. APU->PMU communication is always
> through EEMI firmware interface which is using SMC/HVC.
>
Ah OK, is it because there's no non-secure mailbox or to avoid races,
all non-secure EEMI is channeled through SMC ?
--
Regards,
Sudeep
next prev parent reply other threads:[~2018-03-13 10:16 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-20 19:21 [PATCH v5 0/4] drivers: firmware: xilinx: Add firmware driver support Jolly Shah
2018-02-20 19:21 ` [PATCH v5 1/4] dt-bindings: firmware: Add bindings for ZynqMP firmware Jolly Shah
2018-03-01 14:15 ` Sudeep Holla
2018-03-07 22:25 ` Jolly Shah
2018-03-08 11:48 ` Sudeep Holla
2018-03-12 23:07 ` Jolly Shah
2018-03-13 10:16 ` Sudeep Holla [this message]
2018-03-13 18:56 ` Jolly Shah
2018-03-01 21:18 ` Rob Herring
2018-02-20 19:21 ` [PATCH v5 2/4] drivers: firmware: xilinx: Add ZynqMP firmware driver Jolly Shah
2018-03-01 14:27 ` Sudeep Holla
2018-03-07 0:44 ` Jolly Shah
2018-03-08 12:18 ` Sudeep Holla
2018-03-12 23:05 ` Jolly Shah
2018-03-13 10:24 ` Sudeep Holla
2018-03-15 17:53 ` Jolly Shah
2018-03-15 17:57 ` Sudeep Holla
2018-03-14 13:22 ` Greg KH
2018-02-20 19:21 ` [PATCH v5 3/4] drivers: firmware: xilinx: Add sysfs interface Jolly Shah
2018-03-01 13:32 ` Michal Simek
2018-03-01 14:09 ` Andy Shevchenko
2018-03-01 14:44 ` Sudeep Holla
2018-03-07 22:03 ` Jolly Shah
2018-02-20 19:21 ` [PATCH v5 4/4] drivers: firmware: xilinx: Add debugfs interface Jolly Shah
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=755770ba-d110-8b2e-3c1f-9b65686dc51f@arm.com \
--to=sudeep.holla@arm.com \
--cc=JOLLYS@xilinx.com \
--cc=RAJANV@xilinx.com \
--cc=ard.biesheuvel@linaro.org \
--cc=devicetree@vger.kernel.org \
--cc=dmitry.torokhov@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=hkallweit1@gmail.com \
--cc=keescook@chromium.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=matt@codeblueprint.co.uk \
--cc=michal.simek@xilinx.com \
--cc=mingo@kernel.org \
--cc=robh+dt@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).