linux-kernel - Re: [PATCH] ARM: move firmware

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Date:	Mon, 18 Nov 2013 10:03:37 -0700
From:	Stephen Warren <swarren@...dotorg.org>
To:	Catalin Marinas <catalin.marinas@....com>,
	Alex Courbot <acourbot@...dia.com>
CC:	Alexandre Courbot <gnurou@...il.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Stephen Warren <swarren@...dia.com>,
	Tomasz Figa <t.figa@...sung.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	Olof Johansson <olof@...om.net>,
	Russell King <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] ARM: move firmware_ops to drivers/firmware

On 11/18/2013 04:58 AM, Catalin Marinas wrote:
...
> Of course, trusted foundations interface could be plugged into cpu_ops
> on arm64 but I will NAK it on the grounds of not using the PSCI API, nor
> the SMC calling convention (and it's easy to fix when porting to ARMv8).
> If a supported standard API is used, then there is no need for
> additional code in the kernel.

What happens when someone takes an existing working secure-mode SW stack
and simply re-uses it on some new ARMv8 SoC. Are you going to force
people working on upstream to re-write the secure mode firmware in
shipped hardware before allowing upstream kernel support?
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