arch/powerpc/include/asm/hmi.h

   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__ */