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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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8cc28269b9
Move the alternative implemenation coding to alternative.c and add code to patch modules while loading. Signed-off-by: Helge Deller <deller@gmx.de>
52 lines
1.5 KiB
C
52 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_PARISC_ALTERNATIVE_H
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#define __ASM_PARISC_ALTERNATIVE_H
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#define ALT_COND_ALWAYS 0x80 /* always replace instruction */
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#define ALT_COND_NO_SMP 0x01 /* when running UP instead of SMP */
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#define ALT_COND_NO_DCACHE 0x02 /* if system has no d-cache */
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#define ALT_COND_NO_ICACHE 0x04 /* if system has no i-cache */
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#define ALT_COND_NO_SPLIT_TLB 0x08 /* if split_tlb == 0 */
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#define ALT_COND_NO_IOC_FDC 0x10 /* if I/O cache does not need flushes */
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#define INSN_PxTLB 0x02 /* modify pdtlb, pitlb */
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#define INSN_NOP 0x08000240 /* nop */
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#ifndef __ASSEMBLY__
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/stddef.h>
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#include <linux/stringify.h>
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struct alt_instr {
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s32 orig_offset; /* offset to original instructions */
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u32 len; /* end of original instructions */
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u32 cond; /* see ALT_COND_XXX */
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u32 replacement; /* replacement instruction or code */
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};
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void set_kernel_text_rw(int enable_read_write);
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void apply_alternatives_all(void);
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void apply_alternatives(struct alt_instr *start, struct alt_instr *end,
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const char *module_name);
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/* Alternative SMP implementation. */
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#define ALTERNATIVE(cond, replacement) "!0:" \
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".section .altinstructions, \"aw\" !" \
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".word (0b-4-.), 1, " __stringify(cond) "," \
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__stringify(replacement) " !" \
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".previous"
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#else
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#define ALTERNATIVE(from, to, cond, replacement)\
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.section .altinstructions, "aw" ! \
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.word (from - .), (to - from)/4 ! \
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.word cond, replacement ! \
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.previous
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_PARISC_ALTERNATIVE_H */
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