diff options
Diffstat (limited to 'arch/arm64/include/asm/alternative-macros.h')
| -rw-r--r-- | arch/arm64/include/asm/alternative-macros.h | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/arch/arm64/include/asm/alternative-macros.h b/arch/arm64/include/asm/alternative-macros.h index 94b486192e1f..862416624852 100644 --- a/arch/arm64/include/asm/alternative-macros.h +++ b/arch/arm64/include/asm/alternative-macros.h @@ -19,7 +19,7 @@ #error "cpucaps have overflown ARM64_CB_BIT" #endif -#ifndef __ASSEMBLY__ +#ifndef __ASSEMBLER__ #include <linux/stringify.h> @@ -207,7 +207,7 @@ alternative_endif #define _ALTERNATIVE_CFG(insn1, insn2, cap, cfg, ...) \ alternative_insn insn1, insn2, cap, IS_ENABLED(cfg) -#endif /* __ASSEMBLY__ */ +#endif /* __ASSEMBLER__ */ /* * Usage: asm(ALTERNATIVE(oldinstr, newinstr, cpucap)); @@ -219,18 +219,22 @@ alternative_endif #define ALTERNATIVE(oldinstr, newinstr, ...) \ _ALTERNATIVE_CFG(oldinstr, newinstr, __VA_ARGS__, 1) -#ifndef __ASSEMBLY__ +#ifndef __ASSEMBLER__ #include <linux/types.h> static __always_inline bool alternative_has_cap_likely(const unsigned long cpucap) { - compiletime_assert(cpucap < ARM64_NCAPS, - "cpucap must be < ARM64_NCAPS"); + if (!cpucap_is_possible(cpucap)) + return false; - asm_volatile_goto( + asm goto( +#ifdef BUILD_VDSO + ALTERNATIVE("b %l[l_no]", "nop", %[cpucap]) +#else ALTERNATIVE_CB("b %l[l_no]", %[cpucap], alt_cb_patch_nops) +#endif : : [cpucap] "i" (cpucap) : @@ -244,10 +248,10 @@ l_no: static __always_inline bool alternative_has_cap_unlikely(const unsigned long cpucap) { - compiletime_assert(cpucap < ARM64_NCAPS, - "cpucap must be < ARM64_NCAPS"); + if (!cpucap_is_possible(cpucap)) + return false; - asm_volatile_goto( + asm goto( ALTERNATIVE("nop", "b %l[l_yes]", %[cpucap]) : : [cpucap] "i" (cpucap) @@ -259,6 +263,6 @@ l_yes: return true; } -#endif /* __ASSEMBLY__ */ +#endif /* __ASSEMBLER__ */ #endif /* __ASM_ALTERNATIVE_MACROS_H */ |