1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Hypervisor Maintenance Interrupt header file. 4 * 5 * Copyright 2015 IBM Corporation 6 * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> 7 */ 8 9 #ifndef __ASM_PPC64_HMI_H__ 10 #define __ASM_PPC64_HMI_H__ 11 12 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 13 14 #define CORE_TB_RESYNC_REQ_BIT 63 15 #define MAX_SUBCORE_PER_CORE 4 16 17 /* 18 * sibling_subcore_state structure is used to co-ordinate all threads 19 * during HMI to avoid TB corruption. This structure is allocated once 20 * per each core and shared by all threads on that core. 21 */ 22 struct sibling_subcore_state { 23 unsigned long flags; 24 u8 in_guest[MAX_SUBCORE_PER_CORE]; 25 }; 26 27 extern void wait_for_subcore_guest_exit(void); 28 extern void wait_for_tb_resync(void); 29 #else 30 static inline void wait_for_subcore_guest_exit(void) { } 31 static inline void wait_for_tb_resync(void) { } 32 #endif 33 34 struct pt_regs; 35 extern long hmi_handle_debugtrig(struct pt_regs *regs); 36 37 #endif /* __ASM_PPC64_HMI_H__ */ 38