From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- arch/s390/include/asm/nospec-insn.h | 132 ++++++++++++++++++++++++++++++++++++ 1 file changed, 132 insertions(+) create mode 100644 arch/s390/include/asm/nospec-insn.h (limited to 'arch/s390/include/asm/nospec-insn.h') diff --git a/arch/s390/include/asm/nospec-insn.h b/arch/s390/include/asm/nospec-insn.h new file mode 100644 index 0000000000..7a946c42ad --- /dev/null +++ b/arch/s390/include/asm/nospec-insn.h @@ -0,0 +1,132 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_S390_NOSPEC_ASM_H +#define _ASM_S390_NOSPEC_ASM_H + +#include +#include + +#ifdef __ASSEMBLY__ + +#ifdef CC_USING_EXPOLINE + +/* + * The expoline macros are used to create thunks in the same format + * as gcc generates them. The 'comdat' section flag makes sure that + * the various thunks are merged into a single copy. + */ + .macro __THUNK_PROLOG_NAME name +#ifdef CONFIG_EXPOLINE_EXTERN + .pushsection .text,"ax",@progbits + __ALIGN +#else + .pushsection .text.\name,"axG",@progbits,\name,comdat +#endif + .globl \name + .hidden \name + .type \name,@function +\name: + CFI_STARTPROC + .endm + + .macro __THUNK_EPILOG_NAME name + CFI_ENDPROC +#ifdef CONFIG_EXPOLINE_EXTERN + .size \name, .-\name +#endif + .popsection + .endm + + .macro __THUNK_PROLOG_BR r1 + __THUNK_PROLOG_NAME __s390_indirect_jump_r\r1 + .endm + + .macro __THUNK_EPILOG_BR r1 + __THUNK_EPILOG_NAME __s390_indirect_jump_r\r1 + .endm + + .macro __THUNK_BR r1 + jg __s390_indirect_jump_r\r1 + .endm + + .macro __THUNK_BRASL r1,r2 + brasl \r1,__s390_indirect_jump_r\r2 + .endm + + .macro __DECODE_R expand,reg + .set .L__decode_fail,1 + .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + .ifc \reg,%r\r1 + \expand \r1 + .set .L__decode_fail,0 + .endif + .endr + .if .L__decode_fail == 1 + .error "__DECODE_R failed" + .endif + .endm + + .macro __DECODE_RR expand,rsave,rtarget + .set .L__decode_fail,1 + .irp r1,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + .ifc \rsave,%r\r1 + .irp r2,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15 + .ifc \rtarget,%r\r2 + \expand \r1,\r2 + .set .L__decode_fail,0 + .endif + .endr + .endif + .endr + .if .L__decode_fail == 1 + .error "__DECODE_RR failed" + .endif + .endm + + .macro __THUNK_EX_BR reg + exrl 0,555f + j . +555: br \reg + .endm + +#ifdef CONFIG_EXPOLINE_EXTERN + .macro GEN_BR_THUNK reg + .endm + .macro GEN_BR_THUNK_EXTERN reg +#else + .macro GEN_BR_THUNK reg +#endif + __DECODE_R __THUNK_PROLOG_BR,\reg + __THUNK_EX_BR \reg + __DECODE_R __THUNK_EPILOG_BR,\reg + .endm + + .macro BR_EX reg +557: __DECODE_R __THUNK_BR,\reg + .pushsection .s390_indirect_branches,"a",@progbits + .long 557b-. + .popsection + .endm + + .macro BASR_EX rsave,rtarget +559: __DECODE_RR __THUNK_BRASL,\rsave,\rtarget + .pushsection .s390_indirect_branches,"a",@progbits + .long 559b-. + .popsection + .endm + +#else + .macro GEN_BR_THUNK reg + .endm + + .macro BR_EX reg + br \reg + .endm + + .macro BASR_EX rsave,rtarget + basr \rsave,\rtarget + .endm +#endif /* CC_USING_EXPOLINE */ + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_S390_NOSPEC_ASM_H */ -- cgit v1.2.3