Alexander Graf wrote:
On 30.10.2008, at 19:10, Avi Kivity wrote:
GIF somehow needs exposure to userspace too, right? Otherwise, when
using -no-kernel-apic, userspace may try to inject an interrupt when
the guest cannot handle it, right?
Hmm, right, it needs to close the interrupt window.
Yes, it's broken with -no-kernel-apic, since the userspace doesn't
know the window is closed. Any good suggestions here? Joerg and me
decided to just ignore the non-kernel-apic case, but if it's important
we might want to sync the hflags with userspace, so we can export the
GIF.
Maybe abusing kvm_run->if_flag? Current, userspace treats if_flag as a
boolean. If you stored GIF and eflags.IF in there, I believe old
userspaces would just work.
Regards,
Anthony Liguori
Alex
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