From: Marc Zyngier Date: Tue, 19 Apr 2022 18:27:54 +0000 (+0100) Subject: arm64: Add wfet()/wfit() helpers X-Git-Tag: v5.19-rc1~137^2~12^2~8^2~6 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=9eae588529751f95834bca775b30b66291def7f6;p=thirdparty%2Fkernel%2Flinux.git 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: Marc Zyngier Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20220419182755.601427-10-maz@kernel.org --- diff --git a/arch/arm64/include/asm/barrier.h b/arch/arm64/include/asm/barrier.h index 62217be362173..9f3e2c3d2ca0f 100644 --- a/arch/arm64/include/asm/barrier.h +++ b/arch/arm64/include/asm/barrier.h @@ -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")