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Re: [Qemu-devel] [PATCH 1/2] Allow QEMUMachine to override reset sequenc


From: Anthony Liguori
Subject: Re: [Qemu-devel] [PATCH 1/2] Allow QEMUMachine to override reset sequencing
Date: Thu, 02 Aug 2012 15:58:28 -0500
User-agent: Notmuch/0.13.2+93~ged93d79 (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu)

Benjamin Herrenschmidt <address@hidden> writes:

> On Thu, 2012-08-02 at 17:17 +0200, Paolo Bonzini wrote:
>> 
>> On x86 we do not pre-load the kernel.  Neither the kernel/initramfs
>> and
>> the option ROM that loads the kernel are written in memory, they are
>> passed to the guest via fw_cfg.  Then the option ROM is loaded by the
>> BIOS, and loads the kernel/initramfs.
>
> How does it do ? IE. how does it access a random pair of files on the
> host side ? Via some magic ports ?

Yes, see hw/fw_cfg.c

Regards,

Anthony Liguori

>
> Cheers,
> Ben.



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