linux-kernel - Re: [PATCH] ARM: OMAP2+: Add support for thumb mode on DT booted N900

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Message-ID: <CAHYPw2FRbcR_anv9f2igcFV6XnCfpjJMHaeZmcNs8KpXuG96cQ@mail.gmail.com>
Date:	Wed, 5 Feb 2014 21:42:30 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Sebastian Reichel <sre@...ian.org>
Cc:	Tony Lindgren <tony@...mide.com>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, freemangordon@....bg
Subject: Re: [PATCH] ARM: OMAP2+: Add support for thumb mode on DT booted N900

2014-02-05 Sebastian Reichel <sre@...ian.org>:
> Hi,
>
> On Wed, Feb 05, 2014 at 05:38:54PM +0100, Pali Rohár wrote:
>> > I assumed, that the workaround is not needed for this device type.
>>
>> That rx51 secure call must not be called on non secure devices (e.g.
>> qemu), because it cause kernel crash. So I thought that kernel should
>> write something like secure call is disabled on that device types.
>> Kernel code for errata 430973 will update ibe bit for non secure
>> devices.
>
> Do you see any advantage in having that message?
>

Consistency. Print message 1) only if secure rx51 smc instruction is
called or 2) print message always (also if smc is not called). With
that patch message is printed (enabled/disabled) only if device is
rx51 and device type is HS.

For information it is also good to know that in qemu that special
secure smc instruction was not called.

-- 
Pali Rohár
pali.rohar@...il.com
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