diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2020-11-26 14:09:59 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-12-03 15:01:09 +0100 |
| commit | 8f8cffd9df81612b5b06d2c57ebf74f8961b41be (patch) | |
| tree | 17e3f68de53724982679d0cfb0094eaaf7768518 /arch/powerpc/include/asm/vdso | |
| parent | powerpc/feature: Use CONFIG_PPC64 instead of __powerpc64__ to define possible... (diff) | |
| download | linux-8f8cffd9df81612b5b06d2c57ebf74f8961b41be.tar.xz linux-8f8cffd9df81612b5b06d2c57ebf74f8961b41be.zip | |
powerpc/processor: Move cpu_relax() into asm/vdso/processor.h
cpu_relax() need to be in asm/vdso/processor.h to be used by
the C VDSO generic library.
Move it there.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201126131006.2431205-2-mpe@ellerman.id.au
Diffstat (limited to 'arch/powerpc/include/asm/vdso')
| -rw-r--r-- | arch/powerpc/include/asm/vdso/processor.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/vdso/processor.h b/arch/powerpc/include/asm/vdso/processor.h new file mode 100644 index 000000000000..e072577bc7c0 --- /dev/null +++ b/arch/powerpc/include/asm/vdso/processor.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_POWERPC_VDSO_PROCESSOR_H +#define _ASM_POWERPC_VDSO_PROCESSOR_H + +#ifndef __ASSEMBLY__ + +/* Macros for adjusting thread priority (hardware multi-threading) */ +#define HMT_very_low() asm volatile("or 31, 31, 31 # very low priority") +#define HMT_low() asm volatile("or 1, 1, 1 # low priority") +#define HMT_medium_low() asm volatile("or 6, 6, 6 # medium low priority") +#define HMT_medium() asm volatile("or 2, 2, 2 # medium priority") +#define HMT_medium_high() asm volatile("or 5, 5, 5 # medium high priority") +#define HMT_high() asm volatile("or 3, 3, 3 # high priority") + +#ifdef CONFIG_PPC64 +#define cpu_relax() do { HMT_low(); HMT_medium(); barrier(); } while (0) +#else +#define cpu_relax() barrier() +#endif + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_POWERPC_VDSO_PROCESSOR_H */ |