[Qemu-devel] Re: x86_64 target

["Alexander E. Patrakov" <patrakov@ums.usu.ru>]

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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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*** STOP: 0x0000001E (0xC000001D,0x80432AC9,0xE1008A98,0xF74lB99C)
KMODE_EXCEPTION_NOT_HANDLED

*** Address 80432AC9 base at 80400000, DateStamp 384d9bl7 - ntoskrnl.exe

If this is the first time gou've seen this Stop error screen,
restart gour computer. If this screen appears again, follow
these steps:

Check to be sure gou have adequate disk space. If a driver is
identified in the Stop Message, disable the driver or check
with the manufacturer for driver updates. Try changing video
adapters.

Check with gour hardware vendor for ang BIOS updates. Disable
BIOS memorg options such as caching or shadowing. If gou need
to use Safe Mode to reMove or disable components, restart gour
computer, press F8 to select Advanced Startup Options, and then
select Safe Mode.

Refer to gour Getting Started manual for more information on
troubleshooting Stop errors.