/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Hypervisor Maintenance Interrupt header file.
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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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#ifndef __ASM_PPC64_HMI_H__
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#define __ASM_PPC64_HMI_H__
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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#define CORE_TB_RESYNC_REQ_BIT 63
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#define MAX_SUBCORE_PER_CORE 4
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/*
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* sibling_subcore_state structure is used to co-ordinate all threads
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* during HMI to avoid TB corruption. This structure is allocated once
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* per each core and shared by all threads on that core.
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*/
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struct sibling_subcore_state {
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unsigned long flags;
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u8 in_guest[MAX_SUBCORE_PER_CORE];
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};
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extern void wait_for_subcore_guest_exit(void);
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extern void wait_for_tb_resync(void);
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#else
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static inline void wait_for_subcore_guest_exit(void) { }
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static inline void wait_for_tb_resync(void) { }
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#endif
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struct pt_regs;
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extern long hmi_handle_debugtrig(struct pt_regs *regs);
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#endif /* __ASM_PPC64_HMI_H__ */
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