linux-libre/arch/powerpc/include/asm/hmi.h

/*
 * Hypervisor Maintenance Interrupt header file.
 *
 * 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.
 *
 * Copyright 2015 IBM Corporation
 * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
 */

#ifndef __ASM_PPC64_HMI_H__
#define __ASM_PPC64_HMI_H__

#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE

#define	CORE_TB_RESYNC_REQ_BIT		63
#define MAX_SUBCORE_PER_CORE		4

/*
 * sibling_subcore_state structure is used to co-ordinate all threads
 * during HMI to avoid TB corruption. This structure is allocated once
 * per each core and shared by all threads on that core.
 */
struct sibling_subcore_state {
	unsigned long	flags;
	u8		in_guest[MAX_SUBCORE_PER_CORE];
};

extern void wait_for_subcore_guest_exit(void);
extern void wait_for_tb_resync(void);
#else
static inline void wait_for_subcore_guest_exit(void) { }
static inline void wait_for_tb_resync(void) { }
#endif
#endif /* __ASM_PPC64_HMI_H__ */