Re: [RFC, PATCH 5/24] i386 Vmi code patching
From: Chris Wright
Date: Wed Mar 22 2006 - 17:59:44 EST
* Daniel Arai (arai@xxxxxxxxxx) wrote:
> To elaborate a bit more, the "ROM" layer is "published" by the hypervisor.
> This layer of abstraction will let you take a VMI-compiled kernel and run
> it efficiently on any hypervisor that exports a VMI interface - even one
> that you didn't know about (or didn't exist) when you compiled your kernel.
> If the ROM part is compiled into the code, then you have to compile in
> support for the specific hypervisor(s) you want to run on. It might be
> reasonable for this code to be in a lodable kernel module, rather than a
> device ROM per se, but you still want that kernel module to be provided by
> the hypervisor.
I don't agree. That module may know how to get interface info from a
vdso analog (just like a driver knows the hardware details of the device
it's interacting with, but the core kernel api is unaware), but placing
the binary compatibility on the kernel proper is wrong IMO.
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