linux-kernel - Re: [PATCH v4 0/3] MediaTek Security random number generator support

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Message-ID: <1564709744.8481.2.camel@mtkswgap22>
Date:   Fri, 2 Aug 2019 09:35:44 +0800
From:   Neal Liu <neal.liu@...iatek.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Mark Rutland <mark.rutland@....com>
CC:     Matt Mackall <mpm@...enic.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Sean Wang <sean.wang@...nel.org>,
        "Crystal Guo (郭晶)" 
        <Crystal.Guo@...iatek.com>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-mediatek@...ts.infradead.org" 
        <linux-mediatek@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        wsd_upstream <wsd_upstream@...iatek.com>,
        Neal Liu <neal.liu@...iatek.com>
Subject: Re: [PATCH v4 0/3] MediaTek Security random number generator support

Dear Matthias, Rob, Mark,
	Just gentle ping.
	Thanks


> On Mon, 2019-06-24 at 15:24 +0800, Neal Liu wrote:
> > These patch series introduce a generic rng driver for Trustzone
> > based kernel driver which would like to communicate with ATF
> > SIP services.
> > 
> > Patch #1 initials SMC fid table for Mediatek SIP interfaces and
> > adds HWRNG related SMC call.
> > 
> > Patch #2..3 adds mtk-sec-rng kernel driver for Trustzone based SoCs.
> > For MediaTek SoCs on ARMv8 with TrustZone enabled, peripherals like
> > entropy sources is not accessible from normal world (linux) and
> > rather accessible from secure world (ATF/TEE) only. This driver aims
> > to provide a generic interface to ATF rng service.
> > 
> > 
> > changes since v1:
> > - rename mt67xx-rng to mtk-sec-rng since all MediaTek ARMv8 SoCs
> > can reuse this driver.
> > - refine coding style and unnecessary check.
> > 
> > changes since v2:
> > - remove unused comments.
> > - remove redundant variable.
> > 
> > changes since v3:
> > - add dt-bindings for MediaTek rng with TrustZone enabled
> > - revise HWRNG SMC call fid
> > 
> > 
> > Neal Liu (3):
> >   soc: mediatek: add SMC fid table for SIP interface
> >   dt-bindings: rng: add bindings for MediaTek ARMv8 SoCs
> >   hwrng: add mtk-sec-rng driver
> > 
> >  .../devicetree/bindings/rng/mtk-sec-rng.txt   | 10 ++
> >  drivers/char/hw_random/Kconfig                | 16 +++
> >  drivers/char/hw_random/Makefile               |  1 +
> >  drivers/char/hw_random/mtk-sec-rng.c          | 97 +++++++++++++++++++
> >  include/linux/soc/mediatek/mtk_sip_svc.h      | 33 +++++++
> >  5 files changed, 157 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/rng/mtk-sec-rng.txt
> >  create mode 100644 drivers/char/hw_random/mtk-sec-rng.c
> >  create mode 100644 include/linux/soc/mediatek/mtk_sip_svc.h
> > 
>