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arm64: Check if GMID_EL1.BS is the same on all CPUs
The GMID_EL1.BS field determines the number of tags accessed by the LDGM/STGM instructions (EL1 and up), used by the kernel for copying or zeroing page tags. Taint the kernel if GMID_EL1.BS differs between CPUs but only of CONFIG_ARM64_MTE is enabled. Signed-off-by: Catalin Marinas <[email protected]> Cc: Will Deacon <[email protected]> Cc: Mark Rutland <[email protected]> Cc: Suzuki K Poulose <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Will Deacon <[email protected]>
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