From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/arm64/include/asm/alternative.h | 44 +++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 kernel/arch/arm64/include/asm/alternative.h (limited to 'kernel/arch/arm64/include/asm/alternative.h') diff --git a/kernel/arch/arm64/include/asm/alternative.h b/kernel/arch/arm64/include/asm/alternative.h new file mode 100644 index 000000000..d261f01e2 --- /dev/null +++ b/kernel/arch/arm64/include/asm/alternative.h @@ -0,0 +1,44 @@ +#ifndef __ASM_ALTERNATIVE_H +#define __ASM_ALTERNATIVE_H + +#include +#include +#include + +struct alt_instr { + s32 orig_offset; /* offset to original instruction */ + s32 alt_offset; /* offset to replacement instruction */ + u16 cpufeature; /* cpufeature bit set for replacement */ + u8 orig_len; /* size of original instruction(s) */ + u8 alt_len; /* size of new instruction(s), <= orig_len */ +}; + +void apply_alternatives_all(void); +void apply_alternatives(void *start, size_t length); +void free_alternatives_memory(void); + +#define ALTINSTR_ENTRY(feature) \ + " .word 661b - .\n" /* label */ \ + " .word 663f - .\n" /* new instruction */ \ + " .hword " __stringify(feature) "\n" /* feature bit */ \ + " .byte 662b-661b\n" /* source len */ \ + " .byte 664f-663f\n" /* replacement len */ + +/* alternative assembly primitive: */ +#define ALTERNATIVE(oldinstr, newinstr, feature) \ + "661:\n\t" \ + oldinstr "\n" \ + "662:\n" \ + ".pushsection .altinstructions,\"a\"\n" \ + ALTINSTR_ENTRY(feature) \ + ".popsection\n" \ + ".pushsection .altinstr_replacement, \"a\"\n" \ + "663:\n\t" \ + newinstr "\n" \ + "664:\n\t" \ + ".popsection\n\t" \ + ".if ((664b-663b) != (662b-661b))\n\t" \ + " .error \"Alternatives instruction length mismatch\"\n\t"\ + ".endif\n" + +#endif /* __ASM_ALTERNATIVE_H */ -- cgit 1.2.3-korg