[Qemu-devel] Re: x86_64 target

[Alexander E. Patrakov]

Fabrice Bellard wrote:

> Hi,
> 
> As a small gift for this new year, here is an initial implementation of
> the x86_64 target in QEMU. It is a "work in progress" as usual, but it
> works enough to boot an x86_64 Linux kernel (I used the one available at
> http://bochs.sourceforge.net/guestos/linux.x86-64.bzImage).
> 
> Although the x86_64 target works correctly on 32 bit hosts, it is
> designed to have the best performances on 64 bit hosts, such as x86_64
> or ppc64. The current speed is poor relatively to the i386 emulation
> because I did not enable register usage on 64 bit hosts (no time to test
> it yet).
> 
> The biggest missing part is a full implementation of SSE - I only added
> the minimal subset for the Linux kernel. I won't work again on the
> x86_64 target in the near future (as I said earlier most of my time is
> dedicated on improving the x86 on x86 speed), but anyone is free to
> submit patches.

I booted an existing win2k image with the new qemu-system-x86_64 emulator
(just to check that there are no i386 regressions) and the result is a
bluescreen (GOCR'ed and attached).

-- 
Alexander E. Patrakov

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