[vbox-dev] KVM & VirtualBox

[Michael van der Kolff]

That's sort of what I thought of it as. I was sort of wondering though why
it seemed that IOMMMIORead wasn't called anywhere
On 23/12/2010 3:41 AM, "Huihong Luo" <huisinro at yahoo.com> wrote:
> Another way to look at this is to use VBox's device emulation code for
KVM, replacing current QEMU emulation. Either way, lots of work.
>
> --- On Wed, 12/22/10, Sander van Leeuwen <sander.x.van.leeuwen at oracle.com>
wrote:
>
>
> From: Sander van Leeuwen <sander.x.van.leeuwen at oracle.com>
> Subject: Re: [vbox-dev] KVM & VirtualBox
> To: vbox-dev at virtualbox.org
> Date: Wednesday, December 22, 2010, 5:33 AM
>
>
> Michael,
>
> That sounds like a pointless exercise to me. First of all VirtualBox isn't
some QEmu extension like KVM
> and the entire code is very tightly integrated.  It's not possible without
rewriting 75% of the hypervisor.
> Be my guest, but I don't know how many man years you've allocated for this
task. :-)
> I also fail to see what you want to accomplish with that.
>
> (MM)IO is handled in the instruction emulator, which calls the IOM*
functions, which end up calling
> the registered device handlers. (src/VBox/VMM for IO handling,
src/VBox/Devices for the virtual device code)
>
> Sander
>
> On 12/22/2010 8:35 AM, Michael van der Kolff wrote:
>> I was thinking of attempting to write a patch to make VirtualBox use
>> KVM for its CPU (KVM only implements the CPU, it doesn't implement
>> platform - that's someone else's job). So, I read alternately the
>> doxygen documentation&  the VBox source code (kvm-all.c from qemu
>> shows how to handle all of the stuff that KVM can chuck back - simple
>> once one sees how...).  Anyway, I was looking to join the bits that do
>> MMIO&  IO, and the doxygen documentation&  names, categorisation,
>> etc... would seem to imply that IOMMMIO{Read/Write} are responsible
>> for that - except it would seem that they aren't called anywhere right
>> now.
>>
>> How exactly is MMIO handled in VirtualBox right now?
>>
>> Cheers,
>>
>> Michael
>>
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>
>
> -- Kind regards / Mit freundlichen Gruessen / Met vriendelijke groet
>
> --
> Sander van Leeuwen | Senior Staff Engineer, VirtualBox
> Oracle Virtualization
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