A special situation may occur when a processor raises its task
priority to be greater than or equal to the level of the
interrupt for which the processor INTR signal is currently
being asserted. If at the time the INTA cycle is issued, the
interrupt that was to be dispensed has become masked (programmed
by software), the local APIC will deliver a spurious-interrupt
vector. Dispensing the spurious-interrupt vector does not affect
the ISR, so the handler for this vector should return without an EOI.
Change-Id: I4cf4744bd6efd68b72e2c380269de4181dc80bd9
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
Andrew Boie