/*
 * Preemptible hypercalls
 *
 * Copyright (C) 2014 Citrix Systems R&D ltd.
 *
 * This source code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 */

#include <linux/sched.h>
#include <xen/xen-ops.h>

#ifndef CONFIG_PREEMPT

/*
 * Some hypercalls issued by the toolstack can take many 10s of
 * seconds. Allow tasks running hypercalls via the privcmd driver to
 * be voluntarily preempted even if full kernel preemption is
 * disabled.
 *
 * Such preemptible hypercalls are bracketed by
 * xen_preemptible_hcall_begin() and xen_preemptible_hcall_end()
 * calls.
 */

DEFINE_PER_CPU(bool, xen_in_preemptible_hcall);
EXPORT_SYMBOL_GPL(xen_in_preemptible_hcall);

asmlinkage __visible void xen_maybe_preempt_hcall(void)
{
	if (unlikely(__this_cpu_read(xen_in_preemptible_hcall)
		     && need_resched())) {
		/*
		 * Clear flag as we may be rescheduled on a different
		 * cpu.
		 */
		__this_cpu_write(xen_in_preemptible_hcall, false);
		_cond_resched();
		__this_cpu_write(xen_in_preemptible_hcall, true);
	}
}
#endif /* CONFIG_PREEMPT */
-back</option>
<option value='packet-rx-pump-back'>packet-rx-pump-back</option>
</select> <input type='submit' value='switch'/></form></td></tr>
<tr><td class='sub'>net-next plumbings</td><td class='sub right'>Tobias Klauser</td></tr></table>
<table class='tabs'><tr><td>
<a href='/cgit.cgi/linux/net-next.git/?h=nds-private-remove'>summary</a><a href='/cgit.cgi/linux/net-next.git/refs/?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>refs</a><a href='/cgit.cgi/linux/net-next.git/log/include/rdma?h=nds-private-remove'>log</a><a class='active' href='/cgit.cgi/linux/net-next.git/tree/include/rdma?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/include/rdma?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/include/rdma?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/include/rdma'>
<input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='e471486c13b82b1338d49c798f78bb62b1ed0a9e'/><select name='qt'>
<option value='grep'>log msg</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>root</a>/<a href='/cgit.cgi/linux/net-next.git/tree/include?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>include</a>/<a href='/cgit.cgi/linux/net-next.git/tree/include/rdma?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>rdma</a></div><div class='content'><table summary='tree listing' class='list'>
<tr class='nohover'><th class='left'>Mode</th><th class='left'>Name</th><th class='right'>Size</th><th/></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib.h</a></td><td class='ls-size'>3386</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_addr.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_addr.h</a></td><td class='ls-size'>10080</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_addr.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_addr.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_cache.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_cache.h</a></td><td class='ls-size'>6375</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_cache.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_cache.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_cm.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_cm.h</a></td><td class='ls-size'>19359</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_cm.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_cm.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_fmr_pool.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_fmr_pool.h</a></td><td class='ls-size'>3439</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_fmr_pool.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_fmr_pool.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_hdrs.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_hdrs.h</a></td><td class='ls-size'>4989</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_hdrs.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_hdrs.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_mad.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_mad.h</a></td><td class='ls-size'>27924</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_mad.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_mad.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_marshall.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_marshall.h</a></td><td class='ls-size'>2025</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_marshall.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_marshall.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_pack.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_pack.h</a></td><td class='ls-size'>9047</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_pack.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_pack.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_pma.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_pma.h</a></td><td class='ls-size'>5579</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_pma.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_pma.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_sa.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_sa.h</a></td><td class='ls-size'>16914</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_sa.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_sa.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_smi.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_smi.h</a></td><td class='ls-size'>5633</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_smi.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_smi.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_umem.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_umem.h</a></td><td class='ls-size'>3577</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_umem.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_umem.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_umem_odp.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_umem_odp.h</a></td><td class='ls-size'>5300</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_umem_odp.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_umem_odp.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/ib_verbs.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>ib_verbs.h</a></td><td class='ls-size'>99966</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/ib_verbs.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/ib_verbs.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/iw_cm.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>iw_cm.h</a></td><td class='ls-size'>8793</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/iw_cm.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/iw_cm.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/iw_portmap.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>iw_portmap.h</a></td><td class='ls-size'>7688</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/iw_portmap.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/iw_portmap.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/mr_pool.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>mr_pool.h</a></td><td class='ls-size'>954</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/mr_pool.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/mr_pool.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/opa_port_info.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>opa_port_info.h</a></td><td class='ls-size'>15063</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/opa_port_info.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/opa_port_info.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>
<tr><td class='ls-mode'>-rw-r--r--</td><td><a class='ls-blob h' href='/cgit.cgi/linux/net-next.git/tree/include/rdma/opa_smi.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>opa_smi.h</a></td><td class='ls-size'>4417</td><td><a class='button' href='/cgit.cgi/linux/net-next.git/log/include/rdma/opa_smi.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>log</a><a class='button' href='/cgit.cgi/linux/net-next.git/plain/include/rdma/opa_smi.h?h=nds-private-remove&amp;id=e471486c13b82b1338d49c798f78bb62b1ed0a9e'>plain</a></td></tr>