From: Michal Simek <michal.simek@xilinx.com>
To: Rob Herring <robh@kernel.org>, Michal Simek <michal.simek@xilinx.com>
Cc: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>,
Edgar Iglesias <edgari@xilinx.com>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
Soren Brinkmann <soren.brinkmann@xilinx.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
<monstr@monstr.eu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH 1/3] dt: xilinx: zynqmp: Add bindings for PM firmware
Date: Mon, 14 Aug 2017 16:35:34 +0200 [thread overview]
Message-ID: <dd6173f6-7ae2-913a-321d-ec1e492af629@xilinx.com> (raw)
In-Reply-To: <CABGGiszb1kr8ggo8Jv9jsvStK5DxpseuBy7z=_OK8pLN==h25Q@mail.gmail.com>
On 14.8.2017 16:03, Rob Herring wrote:
> On Mon, Aug 14, 2017 at 8:47 AM, Michal Simek <michal.simek@xilinx.com> wrote:
>> On 11.8.2017 15:54, Edgar E. Iglesias wrote:
>>> On Fri, Aug 11, 2017 at 02:58:03PM +0200, Michal Simek wrote:
>>>> Hi Rob, +Edgar,
>>>>
>>>> On 10.8.2017 21:10, Rob Herring wrote:
>>>>> On Fri, Aug 04, 2017 at 03:45:30PM +0200, Michal Simek wrote:
>>>>>> From: Soren Brinkmann <soren.brinkmann@xilinx.com>
>>>>>>
>>>>>> Document the DT bindings for the Zynq UltraScale+ PM Firmware.
>
> [...]
>
>>>>>> + - method: The method of calling the PM-API firmware layer.
>>>>>> + Permitted values are:
>>>>>> + - "smc" : To be used in configurations without a hypervisor
>>>>>> + - "hvc" : To be used when hypervisor is present
>>>>>
>>>>> Do you really use both?
>>>>>
>>>>
>>>> SMCs definitely yes.
>>>>
>>>> Interface was designed in that way and I don't know if people are using
>>>> it or not.
>>>>
>>>> Not sure if Xen is blocking SMCs. I know we have discussed it but not
>>>> sure if this is enabled by default or only for certain configurations.
>>>> Also not sure if xen contains handler for hvc.
>>>> Edgar: Do you know?
>>>
>>> We have patches for Xen that implement a power-management mediator.
>>> That implementation handles PM calls over both SMC and HVC insns.
>>> Patches are on the Xen mailing list.
>>>
>>> Other hypervisors may work differently.
>>>
>>> I think we should support both but I don't have a strong opinion on it.
>>
>> Rob: Are you ok with having it there?
>
> Yes.
Ok. Let me send v2 then.
Thanks,
Michal
next prev parent reply other threads:[~2017-08-14 14:35 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-04 13:45 [PATCH 0/3] arm64 xilinx zynqmp firmware interface Michal Simek
2017-08-04 13:45 ` [PATCH 1/3] dt: xilinx: zynqmp: Add bindings for PM firmware Michal Simek
2017-08-10 19:10 ` Rob Herring
2017-08-11 12:58 ` Michal Simek
2017-08-11 13:54 ` Edgar E. Iglesias
2017-08-14 13:47 ` Michal Simek
2017-08-14 14:03 ` Rob Herring
2017-08-14 14:35 ` Michal Simek [this message]
2017-08-04 13:45 ` [PATCH 2/3] arm64: zynqmp: dt: Add PM firmware node Michal Simek
2017-08-04 13:45 ` [PATCH 3/3] soc: xilinx: zynqmp: Add firmware interface Michal Simek
2017-08-14 15:06 ` Arnd Bergmann
2017-08-16 11:51 ` Michal Simek
2017-08-16 12:05 ` Michal Simek
2017-08-16 12:41 ` Arnd Bergmann
2017-08-16 14:00 ` Michal Simek
2017-08-16 14:34 ` Michal Simek
2017-08-16 15:05 ` Arnd Bergmann
2017-08-17 10:48 ` Michal Simek
2017-08-17 21:11 ` Arnd Bergmann
2017-08-18 12:14 ` Michal Simek
2017-08-05 4:23 ` [PATCH 0/3] arm64 xilinx zynqmp " Alexander Graf
2017-08-07 6:09 ` Michal Simek
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=dd6173f6-7ae2-913a-321d-ec1e492af629@xilinx.com \
--to=michal.simek@xilinx.com \
--cc=devicetree@vger.kernel.org \
--cc=edgar.iglesias@xilinx.com \
--cc=edgari@xilinx.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=monstr@monstr.eu \
--cc=robh@kernel.org \
--cc=soren.brinkmann@xilinx.com \
/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).