[Xen-ia64-devel] Re: [Xen-devel] [RFC] hvm-stub for ia64

[tgingold@xxxxxxx]

Quoting Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>:

> tgingold@xxxxxxx, le Thu 22 Nov 2007 12:12:31 +0100, a écrit :
> > Quoting Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>:
> > Of course it doesn't reimplement the emulation.  The current biggest
> emulation
> > is the IDE and I have copied ide.c from qemu and made almost no
> modification.
>
> That's still forking.  And you'll also need to do it for vga,
> network, ...

To be fair, I'd need to know better how stubdomain is implemented.


> > The advantage is my approach is no need for scheduling between two domains
> > for hardware emulation.
>
> Ah, yes, on ia64 you have room to load your firmware in the domain
> itself, which makes an extra benefit (with the stubdomain we avoid the
> need for linux scheduling, but not the need for xen scheduling).
Should be the same on x86.  Firmware is loaded between 4GB-16MB and 4GB.
Enough room for stub firmware and EFI.

Tristan.


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