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Re: [Qemu-devel] PPC emulation on Qemu

From: Chad Page
Subject: Re: [Qemu-devel] PPC emulation on Qemu
Date: Sun, 15 Feb 2004 23:46:16 -0800 (PST)

On Mon, 16 Feb 2004, Gwenole Beauchesne wrote:

> > Does the OSI calls mechanism needs patched OS and/or firmware ?
> I have not looked at MOL that much but OSI stands for Operating System 
> Interface. i.e. a means that can communicate from the guest OS and the 
> host OS through (here) "normal" syscalls. On the Mac side, specific 
> drivers use those syscall to get/set variables in a fast way. Ben said 
> it's all optional but useful performance wise. SheepShaver does a 
> similar thing with EmulOps (major opcode = 6 on ppc), or direct TVECT 
> patching on native PPC.

        Sidenote:  Perhaps if OSI could be made available in both PPC and
X86 qemu system emulators we could keep a patch against 2.6.x with drivers
to use those calls to make running Linux faster on x86 as well.  Combined
with the latest work Fabrice is doing getting rid of slow PIO for hard
drives would be a good thing.

        - Chad

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