Christian Borntraeger wrote: > Am Montag, 15. Oktober 2007 schrieb Avi Kivity: >> We can clear it a bit later, after local_irq_enable() in __vcpu_run(). >> However we need a nop instruction first because "sti" keeps interrupts >> disabled for one more instruction. > > Ah, I see. The host interrupt behaves different and instead of running the > interrupt handler, it exits the vmrun on x86? The interrupt handler will be > called some cycles after the sti? > That is different to s390. We can run the guest code for a long time and the > host instruction pointer stays on the sie instruction. That means, we can > interrupt sie and continue by simply setting the instrution pointer (PSW) > back to the sie instruction. > > Any idea how to make this proper on all architectures? I will have a look. I think the solution is to have an arch dependent kvm_guest_exit(): empty for x86, clearing the bit for s390. Regards, Laurent -- ---------------- [email protected] ----------------- "Given enough eyeballs, all bugs are shallow" E. S. Raymond
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