Re: [Xen-devel] X86_emulate to be moved into qemu...

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 17 May 2006, at 22:45, Jon Smirl wrote:

> It wasn't clear from the earlier mail that this was only a partial
> emulator. We are already using the emulator from the Linux Bios
> project so we'll stick with that. It would nice to reduce the number
> of emulator code bases being used.
Different applications require quite different emulators. The 
scitechsoft one in linuxbios emulates true real-mode only (no protected 
mode; no big real mode) and it will run on non-x86 hardware (obviously 
a fundamental requirement for your use). For us protected mode is the 
primary mode of operation, and we get *significant* speedup and 
simplification by knowing that we are emulating on x86 (specifically we 
execute a regs-only version of the instruction we are 'emulating', 
hence no tedious emulation of flags etc -- basically we only emulate 
the data movement to/from memory).
 -- Keir


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