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authorSuzuki K Poulose <suzuki.poulose@arm.com>2018-09-16 23:17:23 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2018-09-17 14:56:01 +0100
commit74e248286e1d04b0d9bfdd002450ef0211f6f29f (patch)
treea3e826a31a325dcce06d412a055d7fd70608b23d /arch/arm64/Kconfig
parentarm64: fix for bad_mode() handler to always result in panic (diff)
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arm64: sysreg: Clean up instructions for modifying PSTATE fields
Instructions for modifying the PSTATE fields which were not supported in the older toolchains (e.g, PAN, UAO) are generated using macros. We have so far used the normal sys_reg() helper for defining the PSTATE fields. While this works fine, it is really difficult to correlate the code with the Arm ARM definition. As per Arm ARM, the PSTATE fields are defined only using Op1, Op2 fields, with fixed values for Op0, CRn. Also the CRm field has been reserved for the Immediate value for the instruction. So using the sys_reg() looks quite confusing. This patch cleans up the instruction helpers by bringing them in line with the Arm ARM definitions to make it easier to correlate code with the document. No functional changes. Cc: Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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