Mark Williamson wrote:
I think it would be great to maintain compatibility with the binary-only
versions of the vm tools though.
But you're changing the semantics of the x86 instruction set. You
potentially break a real operating system. It also eliminates the
possibility of nesting with something like kqemu because you can't trap
all PIO operations.
Maybe have a commandline flag, and have it switched off by default? Or, even
better, would be to detect valid vmware tools behaviour and switch it on iff
that happened; the default being to behave normally for OSes that aren't
running the VMware tools..
There is no way to know for sure that it's vm-tools running. You would
have to make use of the cpu option to support it I reckon.
Regards,
Anthony Liguori
Cheers,
Mark
Regards,
Anthony Liguori
Regards,
Alex
----- Ursprüngliche Nachricht -----
Von: Anthony Liguori <[EMAIL PROTECTED]>
Gesendet: Sonntag, 20. Januar 2008 22:40
An: qemu-devel@nongnu.org
Betreff: Re: [Qemu-devel] VMport patch
Filip Navara wrote:
Hello,
the current version of QEMU emulates the VMware backdoor I/O port and
it works quite well. Unfortunately it doesn't emulate the VMware
behavior of ignoring the I/O permissions when accessing this special
port. The attached patch corrects it. It's important to ignore the
permissions, so that user mode VMware tools can communicate to the
backdoor. =
I really dislike that VMware relies on this. It's very hard to
implement in kqemu or KVM. I think it would be better to modify
open-vm-tools than to modify QEMU.
Regards,
Anthony Liguori
Best regards,
Filip Navara
