From df3551011b8188e7a9291a66c2c0a04c4eb9d8eb Mon Sep 17 00:00:00 2001 From: Amit Daniel Kachhap Date: Fri, 13 Mar 2020 14:34:52 +0530 Subject: arm64: ptrauth: Add bootup/runtime flags for __cpu_setup This patch allows __cpu_setup to be invoked with one of these flags, ARM64_CPU_BOOT_PRIMARY, ARM64_CPU_BOOT_SECONDARY or ARM64_CPU_RUNTIME. This is required as some cpufeatures need different handling during different scenarios. The input parameter in x0 is preserved till the end to be used inside this function. There should be no functional change with this patch and is useful for the subsequent ptrauth patch which utilizes it. Some upcoming arm cpufeatures can also utilize these flags. Suggested-by: James Morse Signed-off-by: Amit Daniel Kachhap Reviewed-by: Vincenzo Frascino Reviewed-by: James Morse Reviewed-by: Suzuki K Poulose Signed-off-by: Catalin Marinas --- arch/arm64/include/asm/smp.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'arch/arm64/include') diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h index a0c8a0b65259..8d66497d8157 100644 --- a/arch/arm64/include/asm/smp.h +++ b/arch/arm64/include/asm/smp.h @@ -23,6 +23,14 @@ #define CPU_STUCK_REASON_52_BIT_VA (UL(1) << CPU_STUCK_REASON_SHIFT) #define CPU_STUCK_REASON_NO_GRAN (UL(2) << CPU_STUCK_REASON_SHIFT) +/* Possible options for __cpu_setup */ +/* Option to setup primary cpu */ +#define ARM64_CPU_BOOT_PRIMARY (1) +/* Option to setup secondary cpus */ +#define ARM64_CPU_BOOT_SECONDARY (2) +/* Option to setup cpus for different cpu run time services */ +#define ARM64_CPU_RUNTIME (3) + #ifndef __ASSEMBLY__ #include -- cgit v1.2.3