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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2018-05-11 13:15:29 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2018-06-01 01:27:16 +0300 |
| commit | a78d156587931a2c3b354534aa772febf6c9e855 (patch) | |
| tree | e76fd07a3833a1e3a91ad3c86a19a736a39033f4 /arch/arm/include/asm/assembler.h | |
| parent | add5609877c6785cc002c6ed7e008b1d61064439 (diff) | |
| download | linux-a78d156587931a2c3b354534aa772febf6c9e855.tar.xz | |
ARM: spectre-v1: add speculation barrier (csdb) macros
Add assembly and C macros for the new CSDB instruction.
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Boot-tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/include/asm/assembler.h')
| -rw-r--r-- | arch/arm/include/asm/assembler.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/include/asm/assembler.h b/arch/arm/include/asm/assembler.h index bc8d4bbd82e2..ef1386b1af9b 100644 --- a/arch/arm/include/asm/assembler.h +++ b/arch/arm/include/asm/assembler.h @@ -447,6 +447,14 @@ THUMB( orr \reg , \reg , #PSR_T_BIT ) .size \name , . - \name .endm + .macro csdb +#ifdef CONFIG_THUMB2_KERNEL + .inst.w 0xf3af8014 +#else + .inst 0xe320f014 +#endif + .endm + .macro check_uaccess, addr:req, size:req, limit:req, tmp:req, bad:req #ifndef CONFIG_CPU_USE_DOMAINS adds \tmp, \addr, #\size - 1 |