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Date: Mon, 02 Nov 2009 15:56:08 +0200
From: Avi Kivity <avi@redhat.com>
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Subject: Re: [Qemu-devel] PC machine types switched to SeaBIOS/gPXE
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To: Kevin O'Connor <kevin@koconnor.net>
Cc: Anthony Liguori <aliguori@us.ibm.com>, beth kon <eak@us.ibm.com>, Alexander Graf <agraf@suse.de>, Gleb Natapov <gleb@redhat.com>, "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>

On 11/02/2009 03:51 PM, Kevin O'Connor wrote:
> On Mon, Nov 02, 2009 at 03:32:54PM +0200, Avi Kivity wrote:
>    
>> On 11/02/2009 03:15 PM, Alexander Graf wrote:
>>      
>>> They are taken with -d in_asm,cpu,int after doing:
>>>
>>> $ ./x86_64-softmmu/qemu-system-x86_64 -kernel ../kvm/arch/x86/boot/bzImage
>>>
>>> with a fresh checkout from your kvm kernel tree (make defconfig) and a
>>> fresh git checkout of qemu (./configure --target-list=x86_64-softmmu)
>>>
>>>
>>> They basically mean that with SeaBIOS the Linux loading code is trying
>>> to jump off to zeros while at the same place there is useful data using
>>> pcbios.bin.
>>>
>>>        
>> Is seabios clobbering memory?  Gleb/Kevin?
>>      
> I have not tested with the -kernel option before.  I believe you may
> be running into the clearing of memory that PMM does - see
> malloc_finalize() in src/pmm.c.  The PMM spec requires that low memory
> be cleared before starting the boot process.
>
>    

Likely.  Alex, does -kernel use memory below 1MB?  Can it be moved 
elsewhere?

If not, we probably need a protocol where the option rom loads the 
kernel from qemu, rather than qemu poking the kernel into memory.

-- 
error compiling committee.c: too many arguments to function