1<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>irq_set_irqchip_state</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="The Linux Kernel API"><link rel="up" href="hardware.html#id-1.11.2" title="Interrupt Handling"><link rel="prev" href="API-irq-get-irqchip-state.html" title="irq_get_irqchip_state"><link rel="next" href="ch09s02.html" title="DMA Channels"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">irq_set_irqchip_state</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-irq-get-irqchip-state.html">Prev</a> </td><th width="60%" align="center">Interrupt Handling</th><td width="20%" align="right"> <a accesskey="n" href="ch09s02.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-irq-set-irqchip-state"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>irq_set_irqchip_state — 
2     set the state of a forwarded interrupt.
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">irq_set_irqchip_state </b>(</code></td><td>unsigned int <var class="pdparam">irq</var>, </td></tr><tr><td> </td><td>enum irqchip_irq_state <var class="pdparam">which</var>, </td></tr><tr><td> </td><td>bool <var class="pdparam">val</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="id-1.11.2.20.5"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>irq</code></em></span></dt><dd><p>
4     Interrupt line that is forwarded to a VM
5    </p></dd><dt><span class="term"><em class="parameter"><code>which</code></em></span></dt><dd><p>
6     State to be restored (one of IRQCHIP_STATE_*)
7    </p></dd><dt><span class="term"><em class="parameter"><code>val</code></em></span></dt><dd><p>
8     Value corresponding to <em class="parameter"><code>which</code></em>
9    </p></dd></dl></div></div><div class="refsect1"><a name="id-1.11.2.20.6"></a><h2>Description</h2><p>
10   This call sets the internal irqchip state of an interrupt,
11   depending on the value of <em class="parameter"><code>which</code></em>.
12   </p><p>
13
14   This function should be called with preemption disabled if the
15   interrupt controller has per-cpu registers.
16</p></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="API-irq-get-irqchip-state.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="hardware.html#id-1.11.2">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ch09s02.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top"><span class="phrase">irq_get_irqchip_state</span> </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> DMA Channels</td></tr></table></div></body></html>
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