Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2021 Sifive.
|
|
*/
|
|
|
|
#ifndef __ASM_ALTERNATIVE_H
|
|
#define __ASM_ALTERNATIVE_H
|
|
|
|
#include <asm/alternative-macros.h>
|
|
|
|
#ifndef __ASSEMBLER__
|
|
|
|
#ifdef CONFIG_RISCV_ALTERNATIVE
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/types.h>
|
|
#include <linux/stddef.h>
|
|
#include <asm/hwcap.h>
|
|
|
|
#define PATCH_ID_CPUFEATURE_ID(p) lower_16_bits(p)
|
|
#define PATCH_ID_CPUFEATURE_VALUE(p) upper_16_bits(p)
|
|
|
|
#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 */
|
|
|
|
/* add the relative offset to the address of the offset to get the absolute address */
|
|
#define __ALT_PTR(a, f) ((void *)&(a)->f + (a)->f)
|
|
#define ALT_OLD_PTR(a) __ALT_PTR(a, old_offset)
|
|
#define ALT_ALT_PTR(a) __ALT_PTR(a, alt_offset)
|
|
|
|
void __init apply_boot_alternatives(void);
|
|
void __init apply_early_boot_alternatives(void);
|
|
void apply_module_alternatives(void *start, size_t length);
|
|
|
|
void riscv_alternative_fix_offsets(void *alt_ptr, unsigned int len,
|
|
int patch_offset);
|
|
|
|
struct alt_entry {
|
|
s32 old_offset; /* offset relative to original instruction or data */
|
|
s32 alt_offset; /* offset relative to replacement instruction or data */
|
|
u16 vendor_id; /* CPU vendor ID */
|
|
u16 alt_len; /* The replacement size */
|
|
u32 patch_id; /* The patch ID (erratum ID or cpufeature ID) */
|
|
};
|
|
|
|
void andes_errata_patch_func(struct alt_entry *begin, struct alt_entry *end,
|
|
unsigned long archid, unsigned long impid,
|
|
unsigned int stage);
|
|
void mips_errata_patch_func(struct alt_entry *begin, struct alt_entry *end,
|
|
unsigned long archid, unsigned long impid,
|
|
unsigned int stage);
|
|
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
|