ba05b39d54
Currently, kernel modules contain their own set of expoline thunks. In the case of EXPOLINE_EXTERN, this involves postlinking of precompiled expoline.o. expoline.o is also necessary for out-of-source tree module builds. Now that the kernel modules area is less than 4 GB away from kernel expoline thunks, make modules use kernel expolines. Also make EXPOLINE_EXTERN the default if the compiler supports it. This simplifies build and aligns with the approach adopted by other architectures. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
42 lines
1 KiB
C
42 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_S390_EXPOLINE_H
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#define _ASM_S390_EXPOLINE_H
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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extern int nospec_disable;
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void nospec_init_branches(void);
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void nospec_auto_detect(void);
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void nospec_revert(s32 *start, s32 *end);
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static inline bool nospec_uses_trampoline(void)
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{
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return __is_defined(CC_USING_EXPOLINE) && !nospec_disable;
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}
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#ifdef CONFIG_EXPOLINE_EXTERN
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void __s390_indirect_jump_r1(void);
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void __s390_indirect_jump_r2(void);
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void __s390_indirect_jump_r3(void);
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void __s390_indirect_jump_r4(void);
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void __s390_indirect_jump_r5(void);
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void __s390_indirect_jump_r6(void);
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void __s390_indirect_jump_r7(void);
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void __s390_indirect_jump_r8(void);
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void __s390_indirect_jump_r9(void);
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void __s390_indirect_jump_r10(void);
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void __s390_indirect_jump_r11(void);
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void __s390_indirect_jump_r12(void);
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void __s390_indirect_jump_r13(void);
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void __s390_indirect_jump_r14(void);
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void __s390_indirect_jump_r15(void);
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* _ASM_S390_EXPOLINE_H */
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