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Re: [Qemu-devel] [PATCH v3] hw/arm/aspeed: Unlock SCU when running kerne

From: Cédric Le Goater
Subject: Re: [Qemu-devel] [PATCH v3] hw/arm/aspeed: Unlock SCU when running kernel
Date: Wed, 15 Nov 2017 13:13:25 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0

On 11/15/2017 11:56 AM, Peter Maydell wrote:
> On 15 November 2017 at 08:18, Cédric Le Goater <address@hidden> wrote:
>> On 11/14/2017 01:20 PM, Joel Stanley wrote:
>>> The ASPEED hardware contains a lock register for the SCU that disables
>>> any writes to the SCU when it is locked. The machine comes up with the
>>> lock enabled, but on all known hardware u-boot will unlock it and leave
>>> it unlocked when loading the kernel.
>>> This means the kernel expects the SCU to be unlocked. When booting from
>>> an emulated ROM the normal u-boot unlock path is executed. Things don't
>>> go well when booting using the -kernel command line, as u-boot does not
>>> run first.
>>> Change behaviour so that when a kernel is passed to the machine, set the
>>> reset value of the SCU to be unlocked.
>>> Signed-off-by: Joel Stanley <address@hidden>
>> Reviewed-by: Cédric Le Goater <address@hidden>
> Thanks. Should this go into 2.11 ? It sounds like the kind of
> bugfix that ought to...

Yes. Please.



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