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Re: [Qemu-devel] [RFC PATCH] PIIX: reset the VM when the Reset Control R
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From: |
Laszlo Ersek |
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Subject: |
Re: [Qemu-devel] [RFC PATCH] PIIX: reset the VM when the Reset Control Register's RCPU bit gets set |
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Date: |
Mon, 14 Jan 2013 18:54:40 +0100 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.11) Gecko/20121116 Thunderbird/10.0.11 |
On 01/14/13 18:05, Laszlo Ersek wrote:
> I guess I could try to implement the subregion by open-coding the
> memory_region_init_io() and sysbus_add_io() functions and overriding as
> needed, but it seems like a mess. (Which is of course caused by this
> impossible hack of PIIX4 that places the reset control register inside
> the PCI config index register! The IO port 0xcf9 actually has double
> purpose, and it doesn't depend on any kind of "mapping".)
After looking again at the docs, I'm now trying to add a generic region
first (a container), and then, as its children, pci-conf-idx and rcr as
two sibling regions. The docs suggest siblings can overlap.
Thanks
Laszlo