From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/riscv/include/asm/alternative.h | 62 ++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100644 arch/riscv/include/asm/alternative.h (limited to 'arch/riscv/include/asm/alternative.h') diff --git a/arch/riscv/include/asm/alternative.h b/arch/riscv/include/asm/alternative.h new file mode 100644 index 000000000..6511dd73e --- /dev/null +++ b/arch/riscv/include/asm/alternative.h @@ -0,0 +1,62 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2021 Sifive. + */ + +#ifndef __ASM_ALTERNATIVE_H +#define __ASM_ALTERNATIVE_H + +#define ERRATA_STRING_LENGTH_MAX 32 + +#include + +#ifndef __ASSEMBLY__ + +#ifdef CONFIG_RISCV_ALTERNATIVE + +#include +#include +#include +#include + +#define RISCV_ALTERNATIVES_BOOT 0 /* alternatives applied during regular boot */ +#define RISCV_ALTERNATIVES_MODULE 1 /* alternatives applied during module-init */ +#define RISCV_ALTERNATIVES_EARLY_BOOT 2 /* alternatives applied before mmu start */ + +void __init apply_boot_alternatives(void); +void __init apply_early_boot_alternatives(void); +void apply_module_alternatives(void *start, size_t length); + +struct alt_entry { + void *old_ptr; /* address of original instruciton or data */ + void *alt_ptr; /* address of replacement instruction or data */ + unsigned long vendor_id; /* cpu vendor id */ + unsigned long alt_len; /* The replacement size */ + unsigned int errata_id; /* The errata id */ +} __packed; + +struct errata_checkfunc_id { + unsigned long vendor_id; + bool (*func)(struct alt_entry *alt); +}; + +void sifive_errata_patch_func(struct alt_entry *begin, struct alt_entry *end, + unsigned long archid, unsigned long impid, + unsigned int stage); +void thead_errata_patch_func(struct alt_entry *begin, struct alt_entry *end, + unsigned long archid, unsigned long impid, + unsigned int stage); + +void riscv_cpufeature_patch_func(struct alt_entry *begin, struct alt_entry *end, + unsigned int stage); + +#else /* CONFIG_RISCV_ALTERNATIVE */ + +static inline void apply_boot_alternatives(void) { } +static inline void apply_early_boot_alternatives(void) { } +static inline void apply_module_alternatives(void *start, size_t length) { } + +#endif /* CONFIG_RISCV_ALTERNATIVE */ + +#endif +#endif -- cgit v1.2.3