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/* SPDX-License-Identifier: GPL-2.0 */
/*
* arch/arm/monitor.c
*
* Arch-specific monitor_op domctl handler.
*
* Copyright (c) 2016 Tamas K Lengyel (tamas.lengyel@zentific.com)
*/
#include <xen/vm_event.h>
#include <xen/monitor.h>
#include <asm/monitor.h>
#include <asm/vm_event.h>
#include <public/vm_event.h>
int arch_monitor_domctl_event(struct domain *d,
struct xen_domctl_monitor_op *mop)
{
struct arch_domain *ad = &d->arch;
bool requested_status = (XEN_DOMCTL_MONITOR_OP_ENABLE == mop->op);
switch ( mop->event )
{
case XEN_DOMCTL_MONITOR_EVENT_PRIVILEGED_CALL:
{
bool old_status = ad->monitor.privileged_call_enabled;
if ( unlikely(old_status == requested_status) )
return -EEXIST;
domain_pause(d);
ad->monitor.privileged_call_enabled = requested_status;
domain_unpause(d);
break;
}
default:
/*
* Should not be reached unless arch_monitor_get_capabilities() is
* not properly implemented.
*/
ASSERT_UNREACHABLE();
return -EOPNOTSUPP;
}
return 0;
}
int monitor_smc(void)
{
vm_event_request_t req = {
.reason = VM_EVENT_REASON_PRIVILEGED_CALL
};
return monitor_traps(current, 1, &req);
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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