| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * Hypervisor Maintenance Interrupt header file. |
| 4 | * |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 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__ */ |