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From: Stephen Boyd <swboyd@chromium.org>
To: Stephan Gerhold <stephan@gerhold.net>
Cc: Andy Gross <agross@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Elliot Berman <eberman@codeaurora.org>,
	linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org,
	Brian Masney <masneyb@onstation.org>,
	Jeffrey Hugo <jhugo@codeaurora.org>,
	Douglas Anderson <dianders@chromium.org>
Subject: Re: [PATCH v2] firmware: qcom_scm: Only compile legacy calls on ARM
Date: Thu, 08 Apr 2021 14:18:25 -0700	[thread overview]
Message-ID: <161791670545.3790633.14772376161713976241@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <YG6ukFxSMAZ7biYh@gerhold.net>

Quoting Stephan Gerhold (2021-04-08 00:19:44)
> Personally, I think it would be best to introduce a new, SMC64 only
> compatible (e.g. "qcom,scm-64" like I mentioned). Then you can skip the
> detection check for the boards that opt-in by adding the compatible.
> You can then use it on all newer boards/SoCs/firmwares where you know
> exactly that there is SMC64.
> 
> I would just like to avoid breaking any existing boards where we don't
> know exactly if they have SMC32 or SMC64.

Ok that's fair.

> > 
> > Heh, it tried to ensure we use the right calling convention but broke
> > things in the process, because the way of detecting the convention isn't
> > always there. I wouldn't be surprised if this comes up again for other
> > boards that use TF-A.
> 
> Ah okay, this sounds like a better reason than just trying to avoid the
> "overhead" of the detection step. :) I still think it should work if you
> just start marking all newer boards/SoCs/... as "qcom,scm-64" or
> something like that, right?

Sure. I can cook up a set of patches for this.

      reply	other threads:[~2021-04-08 21:18 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23 22:43 [PATCH v2] firmware: qcom_scm: Only compile legacy calls on ARM Stephen Boyd
2021-04-01  1:26 ` Stephen Boyd
2021-04-01  1:52 ` Bjorn Andersson
2021-04-02  1:12 ` Elliot Berman
2021-04-02  6:58   ` Stephen Boyd
2021-04-02 10:18     ` Stephan Gerhold
2021-04-02 17:21       ` Stephen Boyd
2021-04-05 12:50         ` Stephan Gerhold
2021-04-08  0:12           ` Stephen Boyd
2021-04-08  7:19             ` Stephan Gerhold
2021-04-08 21:18               ` Stephen Boyd [this message]

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