linux-kernel - Re: [PATCH v4 00/17] Restructure, improve target support for qcom

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Message-ID: <20200104020849.GR3755841@builder>
Date:   Fri, 3 Jan 2020 18:08:49 -0800
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Brian Masney <masneyb@...tation.org>
Cc:     Elliot Berman <eberman@...eaurora.org>, agross@...nel.org,
        swboyd@...omium.org, saiprakash.ranjan@...eaurora.org,
        tsoni@...eaurora.org, sidgup@...eaurora.org,
        psodagud@...eaurora.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 00/17] Restructure, improve target support for
 qcom_scm driver

On Fri 03 Jan 17:56 PST 2020, Brian Masney wrote:

> On Thu, Dec 12, 2019 at 06:51:07PM +0000, Elliot Berman wrote:
> > This series improves support for 32-bit Qualcomm targets on qcom_scm driver and cleans
> > up the driver for 64-bit implementations.
> > 
> > Currently, the qcom_scm driver supports only 64-bit Qualcomm targets and very
> > old 32-bit Qualcomm targets. Newer 32-bit targets use ARM's SMC Calling
> > Convention to communicate with secure world. Older 32-bit targets use a
> > "buffer-based" legacy approach for communicating with secure world (as
> > implemented in qcom_scm-32.c). All arm64 Qualcomm targets use ARM SMCCC.
> > Currently, SMCCC-based communication is enabled only on ARM64 config and
> > buffer-based communication only on ARM config. This patch-series combines SMCCC
> > and legacy conventions and selects the correct convention by querying the secure
> > world [1].
> > 
> > We decided to take the opportunity as well to clean up the driver rather than
> > try to patch together qcom_scm-32 and qcom_scm-64.
> > 
> > Patches 1-3 and 15 improve macro names, reorder macros/functions, and prune unused
> >             macros/functions. No functional changes were introduced.
> > Patches 4-8 clears up the SCM abstraction in qcom_scm-64.
> > Patches 9-14 clears up the SCM abstraction in qcom_scm-32.
> > Patches 16-17 enable dynamically using the different calling conventions.
> 
> I tested this whole series on arm32 (msm8974) and everything looks good
> from my vantage point. Feel free to add my:
> 
> Tested-by: Brian Masney <masneyb@...tation.org> # arm32
> 

Much appreciated Brian!

Thanks,
Bjorn