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Re: [Qemu-devel] [kvmarm] [PATCH] arm: vexpress: Clear sysctl cfgctrl st
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From: |
Alexander Graf |
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Subject: |
Re: [Qemu-devel] [kvmarm] [PATCH] arm: vexpress: Clear sysctl cfgctrl start bit |
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Date: |
Thu, 24 Jan 2013 20:01:44 +0100 |
On 24.01.2013, at 19:57, Peter Maydell wrote:
> On 24 January 2013 18:54, Alexander Graf <address@hidden> wrote:
>> On 22.12.2012, at 20:03, Christoffer Dall wrote:
>>> The start bit should only be set to indicate that a function call is
>>> underway, right now. When done with function, clear it.
>>
>> Is this the reason 3.8 doesn't run properly?
>
> It appears to be one of the reasons. The other is that
> the kernel is trashing the device tree because it
> happens to be sitting in the same page as the last
> part-page of the initrd, and free_initrd_mem() rounds
> up to a page boundary when poisoning memory after
> the initrd has been uncompressed.
>
> I think there is also some noise because we don't
> emulate the oscillator and voltage regulator control
> sysregs, but the kernel boots anyway.
Does it reboot / shut down for you with this patch?
Alex