From b3000e2133d878e586416e440642ca82d234c6fb Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Thu, 30 Jun 2022 17:04:58 +0100 Subject: arm64: Add the arm64.nosme command line option In order to be able to completely disable SME even if the HW seems to support it (most likely because the FW is broken), move the SME setup into the EL2 finalisation block, and use a new idreg override to deal with it. Note that we also nuke id_aa64smfr0_el1 as a byproduct. Signed-off-by: Marc Zyngier Reviewed-by: Mark Brown Link: https://lore.kernel.org/r/20220630160500.1536744-8-maz@kernel.org Signed-off-by: Will Deacon --- arch/arm64/include/asm/cpufeature.h | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm64/include/asm/cpufeature.h') diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 14a8f3d93add..5adda12b1946 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -909,6 +909,7 @@ static inline unsigned int get_vmid_bits(u64 mmfr1) extern struct arm64_ftr_override id_aa64mmfr1_override; extern struct arm64_ftr_override id_aa64pfr1_override; +extern struct arm64_ftr_override id_aa64smfr0_override; extern struct arm64_ftr_override id_aa64isar1_override; extern struct arm64_ftr_override id_aa64isar2_override; -- cgit v1.2.3