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| author | Amit Daniel Kachhap <amit.kachhap@arm.com> | 2020-03-13 14:34:52 +0530 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-03-18 09:50:19 +0000 |
| commit | df3551011b8188e7a9291a66c2c0a04c4eb9d8eb (patch) | |
| tree | b02d9900c58e0b06f92f1db76567a6f53e0f5f10 /arch/arm64/include | |
| parent | be129842566599f2c6f8fbba277c098802cd4b3d (diff) | |
| download | linux-df3551011b8188e7a9291a66c2c0a04c4eb9d8eb.tar.bz2 | |
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 <james.morse@arm.com>
Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
Reviewed-by: Vincenzo Frascino <Vincenzo.Frascino@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
| -rw-r--r-- | arch/arm64/include/asm/smp.h | 8 |
1 files changed, 8 insertions, 0 deletions
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 <asm/percpu.h> |