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010e12aa49
asm/cmpxchg.h will soon need riscv_has_extension_unlikely() macros and then needs to include asm/cpufeature.h which introduces a lot of header circular dependencies. So move the riscv_has_extension_XXX() macros into their own header which prevents such circular dependencies by including a restricted number of headers. Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: Andrea Parri <parri.andrea@gmail.com> Link: https://lore.kernel.org/r/20241103145153.105097-2-alexghiti@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright 2022-2024 Rivos, Inc
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*/
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#ifndef _ASM_CPUFEATURE_MACROS_H
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#define _ASM_CPUFEATURE_MACROS_H
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#include <asm/hwcap.h>
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#include <asm/alternative-macros.h>
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#define STANDARD_EXT 0
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bool __riscv_isa_extension_available(const unsigned long *isa_bitmap, unsigned int bit);
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#define riscv_isa_extension_available(isa_bitmap, ext) \
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__riscv_isa_extension_available(isa_bitmap, RISCV_ISA_EXT_##ext)
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static __always_inline bool __riscv_has_extension_likely(const unsigned long vendor,
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const unsigned long ext)
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{
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asm goto(ALTERNATIVE("j %l[l_no]", "nop", %[vendor], %[ext], 1)
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:
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: [vendor] "i" (vendor), [ext] "i" (ext)
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:
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: l_no);
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return true;
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l_no:
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return false;
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}
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static __always_inline bool __riscv_has_extension_unlikely(const unsigned long vendor,
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const unsigned long ext)
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{
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asm goto(ALTERNATIVE("nop", "j %l[l_yes]", %[vendor], %[ext], 1)
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:
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: [vendor] "i" (vendor), [ext] "i" (ext)
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:
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: l_yes);
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return false;
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l_yes:
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return true;
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}
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static __always_inline bool riscv_has_extension_unlikely(const unsigned long ext)
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{
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compiletime_assert(ext < RISCV_ISA_EXT_MAX, "ext must be < RISCV_ISA_EXT_MAX");
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if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE))
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return __riscv_has_extension_unlikely(STANDARD_EXT, ext);
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return __riscv_isa_extension_available(NULL, ext);
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}
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static __always_inline bool riscv_has_extension_likely(const unsigned long ext)
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{
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compiletime_assert(ext < RISCV_ISA_EXT_MAX, "ext must be < RISCV_ISA_EXT_MAX");
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if (IS_ENABLED(CONFIG_RISCV_ALTERNATIVE))
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return __riscv_has_extension_likely(STANDARD_EXT, ext);
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return __riscv_isa_extension_available(NULL, ext);
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}
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#endif /* _ASM_CPUFEATURE_MACROS_H */
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