diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index 3deb01c6ed493066986b2202942b8473e3b112d0..9af8df96ec4993a6c2a7baf20a454da2d5277ab1 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -99,7 +99,12 @@ has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry, static void cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *__unused) { - sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0); + u64 mask = arm64_ftr_reg_ctrel0.strict_mask; + + /* Trap CTR_EL0 access on this CPU, only if it has a mismatch */ + if ((read_cpuid_cachetype() & mask) != + (arm64_ftr_reg_ctrel0.sys_val & mask)) + sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0); } atomic_t arm64_el2_vector_last_slot = ATOMIC_INIT(-1);