From 8f8cffd9df81612b5b06d2c57ebf74f8961b41be Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Fri, 27 Nov 2020 00:09:59 +1100 Subject: 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 Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201126131006.2431205-2-mpe@ellerman.id.au --- arch/powerpc/include/asm/vdso/processor.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 arch/powerpc/include/asm/vdso/processor.h (limited to 'arch/powerpc/include/asm/vdso') 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 */ -- cgit v1.2.3