linux-kernel - Re: [PATCH v3 9/9] misc: fastrpc: Add system unsigned PD support

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Date: Fri, 31 May 2024 02:50:29 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Ekansh Gupta <quic_ekangupt@...cinc.com>
Cc: srinivas.kandagatla@...aro.org, linux-arm-msm@...r.kernel.org, 
	gregkh@...uxfoundation.org, quic_bkumar@...cinc.com, linux-kernel@...r.kernel.org, 
	quic_chennak@...cinc.com
Subject: Re: [PATCH v3 9/9] misc: fastrpc: Add system unsigned PD support

On Thu, May 30, 2024 at 03:50:27PM +0530, Ekansh Gupta wrote:
> Trusted CPU applications currently offload to signed PDs on CDSP to
> gain some additional services provided by root PD. Unsigned PDs have
> access to limited root PD services that may not be sufficient for
> all use-cases. Signed PDs have a higher dynamic loading latency
> which impacts the performance of applications. Limited root PD
> services could be opened up for unsigned PDs but that should be
> restricted for untrusted processes. For this requirement, System
> unsigned PD is introduced which will be same as Unsigned PD for
> most part but will have access to more root PD services. Add
> changes to offload trusted applications to System unsigned PD
> when unsigned offload is requested.
> 
> Signed-off-by: Ekansh Gupta <quic_ekangupt@...cinc.com>
> ---
>  drivers/misc/fastrpc.c      | 27 +++++++++++++++++++++------
>  include/uapi/misc/fastrpc.h |  2 ++
>  2 files changed, 23 insertions(+), 6 deletions(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>


-- 
With best wishes
Dmitry