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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Hypervisor Maintenance Interrupt header file.
*
* 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
struct pt_regs;
extern long hmi_handle_debugtrig(struct pt_regs *regs);
#endif /* __ASM_PPC64_HMI_H__ */