2 * Hypervisor Maintenance Interrupt (HMI) handling.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program.
17 * Copyright 2015 IBM Corporation
18 * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
23 #include <linux/types.h>
24 #include <linux/compiler.h>
27 #include <asm/processor.h>
29 void wait_for_subcore_guest_exit(void)
34 * NULL bitmap pointer indicates that KVM module hasn't
35 * been loaded yet and hence no guests are running.
36 * If no KVM is in use, no need to co-ordinate among threads
37 * as all of them will always be in host and no one is going
38 * to modify TB other than the opal hmi handler.
39 * Hence, just return from here.
41 if (!local_paca->sibling_subcore_state)
44 for (i = 0; i < MAX_SUBCORE_PER_CORE; i++)
45 while (local_paca->sibling_subcore_state->in_guest[i])
49 void wait_for_tb_resync(void)
51 if (!local_paca->sibling_subcore_state)
54 while (test_bit(CORE_TB_RESYNC_REQ_BIT,
55 &local_paca->sibling_subcore_state->flags))