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The lists >> SELF_IPI as write-only, ^ >> |- SDM >> >> with no associated MMIO offset, so any write should have no visible >> side effect in the vAPIC page. Reported-by: Chao Gao >> Signed-off-by: Paolo Bonzini >> --- > > Reviewed-by: Sean Christopherson This patch was just attempted to be ported to Xen. Contrary to the claim, Intel Core (P-cores) really do overwrite ICR when processing SELF_IPI. ~Andrew