1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Hypervisor Maintenance Interrupt header file. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright 2015 IBM Corporation 6*4882a593Smuzhiyun * Author: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> 7*4882a593Smuzhiyun */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun #ifndef __ASM_PPC64_HMI_H__ 10*4882a593Smuzhiyun #define __ASM_PPC64_HMI_H__ 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun #define CORE_TB_RESYNC_REQ_BIT 63 15*4882a593Smuzhiyun #define MAX_SUBCORE_PER_CORE 4 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun /* 18*4882a593Smuzhiyun * sibling_subcore_state structure is used to co-ordinate all threads 19*4882a593Smuzhiyun * during HMI to avoid TB corruption. This structure is allocated once 20*4882a593Smuzhiyun * per each core and shared by all threads on that core. 21*4882a593Smuzhiyun */ 22*4882a593Smuzhiyun struct sibling_subcore_state { 23*4882a593Smuzhiyun unsigned long flags; 24*4882a593Smuzhiyun u8 in_guest[MAX_SUBCORE_PER_CORE]; 25*4882a593Smuzhiyun }; 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun extern void wait_for_subcore_guest_exit(void); 28*4882a593Smuzhiyun extern void wait_for_tb_resync(void); 29*4882a593Smuzhiyun #else wait_for_subcore_guest_exit(void)30*4882a593Smuzhiyunstatic inline void wait_for_subcore_guest_exit(void) { } wait_for_tb_resync(void)31*4882a593Smuzhiyunstatic inline void wait_for_tb_resync(void) { } 32*4882a593Smuzhiyun #endif 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun struct pt_regs; 35*4882a593Smuzhiyun extern long hmi_handle_debugtrig(struct pt_regs *regs); 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #endif /* __ASM_PPC64_HMI_H__ */ 38