Anthony Liguori wrote:
> This patch attempts to clean up the interactions between KVM and
> QEMU. Sorry
> for such a big patch, but I don't think there's a better way to
> approach this
> such that it's still bisect friendly. I think this is most of what's
> needed to
> get basic KVM support into QEMU though.
>
> Right now, there's a mix of #ifdef USE_KVM, if (kvm_allowed), and
> various
> extern declarations. It's all pretty fugly and there's a lot of
> mistakes due
> to it.
>
> The following patch eliminates almost all uses of #ifdef USE_KVM by
> introducing
> a kvm_enabled() macro. If USE_KVM is set, this macro evaluates to
> kvm_allowed.
> If USE_KVM isn't set, the macro evaluates to 0.
>
> Since GCC eliminates if (0) blocks, this is just as good as using
> #ifdef. By
> making sure that we never call into libkvm directly from QEMU, we can
> also just
> not link qemu-kvm when USE_KVM isn't set instead of having the entire
> file
> wrapped in a USE_KVM.
>
> We also change the --enable-kvm configure option to --disable-kvm
> since KVM is
> enabled by default.
>
> I've tested this patch on x86 with 32-bit and 64-bit Linux guests and
> a 32-bit
> Windows guest. I've also tested with USE_KVM not set. Jerone has
> also
> verified that it doesn't PPC. My apologies if it breaks ia64 but I
> have no
> way of testing that.
Hi, Anthony
Good patch indeed! I have checked ia64 side, and It shouldn't
break ia64. Thanks!
Xiantao
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