Commit 9eae5885 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

arm64: Add wfet()/wfit() helpers 



Just like we have helpers for WFI and WFE, add the WFxT versions.
Note that the encoding is that reported by objdump, as no currrent
toolchain knows about these instructions yet.

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419182755.601427-10-maz@kernel.org
parent 69bb02eb

arch/arm64/include/asm/barrier.h

+4 −0
Original line number Diff line number Diff line
@@ -16,7 +16,11 @@ 


#define sev()		asm volatile("sev" : : : "memory")

#define wfe()		asm volatile("wfe" : : : "memory")

#define wfet(val)	asm volatile("msr s0_3_c1_c0_0, %0"	\

				     : : "r" (val) : "memory")

#define wfi()		asm volatile("wfi" : : : "memory")

#define wfit(val)	asm volatile("msr s0_3_c1_c0_1, %0"	\

				     : : "r" (val) : "memory")



#define isb()		asm volatile("isb" : : : "memory")

#define dmb(opt)	asm volatile("dmb " #opt : : : "memory")