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Based on 1 normalized pattern(s): this program 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 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 8 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190523091650.663497195@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Hypervisor Maintenance Interrupt (HMI) handling.
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*
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* Copyright 2015 IBM Corporation
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* Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
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*/
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#undef DEBUG
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#include <linux/types.h>
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#include <linux/compiler.h>
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#include <asm/paca.h>
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#include <asm/hmi.h>
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#include <asm/processor.h>
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void wait_for_subcore_guest_exit(void)
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{
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int i;
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/*
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* NULL bitmap pointer indicates that KVM module hasn't
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* been loaded yet and hence no guests are running.
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* If no KVM is in use, no need to co-ordinate among threads
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* as all of them will always be in host and no one is going
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* to modify TB other than the opal hmi handler.
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* Hence, just return from here.
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*/
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if (!local_paca->sibling_subcore_state)
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return;
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for (i = 0; i < MAX_SUBCORE_PER_CORE; i++)
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while (local_paca->sibling_subcore_state->in_guest[i])
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cpu_relax();
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}
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void wait_for_tb_resync(void)
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{
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if (!local_paca->sibling_subcore_state)
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return;
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while (test_bit(CORE_TB_RESYNC_REQ_BIT,
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&local_paca->sibling_subcore_state->flags))
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cpu_relax();
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}
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