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| author |  Sami Tolvanen <samitolvanen@google.com>
| 2020-08-27 13:36:08 -0700 |
|---|---|---|
| committer |  Catalin Marinas <catalin.marinas@arm.com>
| 2020-08-28 11:15:15 +0100 |
| commit | 1764c3edc66880778604f5053fe2dda7b3ddd2c1 (patch) | |
| tree | ab91daddfb4512d9c87fdaf77de518769961d795 /arch/arm64/include/asm/compiler.h | |
| parent | Linux 5.9-rc2 (diff) | |
| download | linux-1764c3edc66880778604f5053fe2dda7b3ddd2c1.tar.gz linux-1764c3edc66880778604f5053fe2dda7b3ddd2c1.tar.bz2 linux-1764c3edc66880778604f5053fe2dda7b3ddd2c1.zip | |
arm64: use a common .arch preamble for inline assembly
Commit 7c78f67e9bd9 ("arm64: enable tlbi range instructions") breaks
LLVM's integrated assembler, because -Wa,-march is only passed to
external assemblers and therefore, the new instructions are not enabled
when IAS is used.
This change adds a common architecture version preamble, which can be
used in inline assembly blocks that contain instructions that require
a newer architecture version, and uses it to fix __TLBI_0 and __TLBI_1
with ARM64_TLB_RANGE.
Fixes: 7c78f67e9bd9 ("arm64: enable tlbi range instructions")
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://github.com/ClangBuiltLinux/linux/issues/1106
Link: https://lore.kernel.org/r/20200827203608.1225689-1-samitolvanen@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/compiler.h')
| -rw-r--r-- | arch/arm64/include/asm/compiler.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/compiler.h b/arch/arm64/include/asm/compiler.h index 51a7ce87cdfe..6fb2e6bcc392 100644 --- a/arch/arm64/include/asm/compiler.h +++ b/arch/arm64/include/asm/compiler.h @@ -2,6 +2,12 @@ #ifndef __ASM_COMPILER_H #define __ASM_COMPILER_H +#ifdef ARM64_ASM_ARCH +#define ARM64_ASM_PREAMBLE ".arch " ARM64_ASM_ARCH "\n" +#else +#define ARM64_ASM_PREAMBLE +#endif + /* * The EL0/EL1 pointer bits used by a pointer authentication code. * This is dependent on TBI0/TBI1 being enabled, or bits 63:56 would also apply. |