On Thu, 2023-12-14 at 14:00 +0000, David Woodhouse wrote: > > > + if (IS_ENABLED(CONFIG_64BIT) && kvm->arch.xen.long_mode) { > > + struct vcpu_info *vcpu_info = gpc->khva; > > + u32 port_word_bit = port / 32; > > Shouldn't that one be /64, and the compat one be /32? I think the reason the test failed to spot this for you is because... #define EVTCHN_TEST1 15 #define EVTCHN_TEST2 66 #define EVTCHN_TIMER 13 ... it doesn't actually use any port numbers where the bit# differs for 32-bit vs. 64-bit. If you change EVTCHN_TIMER to something like 50, I bet it'll fail (as it should).
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