[v4,0/3] MediaTek Security random number generator support

Message

Neal Liu June 24, 2019, 7:24 a.m. UTC

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

Comments

Neal Liu July 22, 2019, 9:50 a.m. UTC | #1

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
>

Neal Liu Aug. 2, 2019, 1:35 a.m. UTC | #2

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
> > 
>