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<span id="id1"></span><h1>OPAL_INT_EOI<a class="headerlink" href="#opal-int-eoi" title="Permalink to this headline">¶</a></h1>
<div class="highlight-c notranslate"><div class="highlight"><pre><span></span><span class="cp">#define OPAL_INT_EOI 124</span>
<span class="k">static</span> <span class="kt">int64_t</span> <span class="nf">opal_int_eoi</span><span class="p">(</span><span class="kt">uint32_t</span> <span class="n">xirr</span><span class="p">);</span>
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<p>Modelled on the <code class="docutils literal notranslate"><span class="pre">H_EOI</span></code> PAPR call.</p>
<p>This can return a positive value, which means more interrupts
are queued for that CPU/priority and must be fetched as the XIVE is not
guaranteed to assert the CPU external interrupt line again until the
pending queue for the current priority has been emptied.</p>
<p>For P9 and above systems where host doesn’t know about interrupt controller.
An OS can instead make OPAL calls for XICS emulation.</p>
<p>For an OS to use this OPAL call, an <code class="docutils literal notranslate"><span class="pre">ibm,opal-intc</span></code> compatible device must
exist in the device tree (see <a class="reference internal" href="../xive.html#xive-device-tree"><span class="std std-ref">I - Device-tree updates</span></a>). If OPAL does not create
such a device, the host OS MUST NOT use this call.</p>
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