1 /* 2 * Hypervisor Maintenance Interrupt header file. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program. 16 * 17 * Copyright 2015 IBM Corporation 18 * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> 19 */ 20 21 #ifndef __ASM_PPC64_HMI_H__ 22 #define __ASM_PPC64_HMI_H__ 23 24 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 25 26 #define CORE_TB_RESYNC_REQ_BIT 63 27 #define MAX_SUBCORE_PER_CORE 4 28 29 /* 30 * sibling_subcore_state structure is used to co-ordinate all threads 31 * during HMI to avoid TB corruption. This structure is allocated once 32 * per each core and shared by all threads on that core. 33 */ 34 struct sibling_subcore_state { 35 unsigned long flags; 36 u8 in_guest[MAX_SUBCORE_PER_CORE]; 37 }; 38 39 extern void wait_for_subcore_guest_exit(void); 40 extern void wait_for_tb_resync(void); 41 #else 42 static inline void wait_for_subcore_guest_exit(void) { } 43 static inline void wait_for_tb_resync(void) { } 44 #endif 45 46 struct pt_regs; 47 extern long hmi_handle_debugtrig(struct pt_regs *regs); 48 49 #endif /* __ASM_PPC64_HMI_H__ */ 50