| /* SPDX-License-Identifier: GPL-2.0 */ | |
| /* | |
| * arch/s390/kernel/base.S | |
| * | |
| * Copyright IBM Corp. 2006, 2007 | |
| * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com> | |
| * Michael Holzheu <holzheu@de.ibm.com> | |
| */ | |
| #include <linux/linkage.h> | |
| #include <asm/asm-offsets.h> | |
| #include <asm/nospec-insn.h> | |
| #include <asm/ptrace.h> | |
| #include <asm/sigp.h> | |
| GEN_BR_THUNK %r9 | |
| GEN_BR_THUNK %r14 | |
| ENTRY(s390_base_ext_handler) | |
| stmg %r0,%r15,__LC_SAVE_AREA_ASYNC | |
| basr %r13,0 | |
| 0: aghi %r15,-STACK_FRAME_OVERHEAD | |
| larl %r1,s390_base_ext_handler_fn | |
| lg %r9,0(%r1) | |
| ltgr %r9,%r9 | |
| jz 1f | |
| BASR_EX %r14,%r9 | |
| 1: lmg %r0,%r15,__LC_SAVE_AREA_ASYNC | |
| ni __LC_EXT_OLD_PSW+1,0xfd # clear wait state bit | |
| lpswe __LC_EXT_OLD_PSW | |
| ENDPROC(s390_base_ext_handler) | |
| .section .bss | |
| .align 8 | |
| .globl s390_base_ext_handler_fn | |
| s390_base_ext_handler_fn: | |
| .quad 0 | |
| .previous | |
| ENTRY(s390_base_pgm_handler) | |
| stmg %r0,%r15,__LC_SAVE_AREA_SYNC | |
| basr %r13,0 | |
| 0: aghi %r15,-STACK_FRAME_OVERHEAD | |
| larl %r1,s390_base_pgm_handler_fn | |
| lg %r9,0(%r1) | |
| ltgr %r9,%r9 | |
| jz 1f | |
| BASR_EX %r14,%r9 | |
| lmg %r0,%r15,__LC_SAVE_AREA_SYNC | |
| lpswe __LC_PGM_OLD_PSW | |
| 1: lpswe disabled_wait_psw-0b(%r13) | |
| ENDPROC(s390_base_pgm_handler) | |
| .align 8 | |
| disabled_wait_psw: | |
| .quad 0x0002000180000000,0x0000000000000000 + s390_base_pgm_handler | |
| .section .bss | |
| .align 8 | |
| .globl s390_base_pgm_handler_fn | |
| s390_base_pgm_handler_fn: | |
| .quad 0 | |
| .previous |