diff options
| author | Marc Zyngier <maz@kernel.org> | 2021-02-08 09:57:29 +0000 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2021-02-09 13:50:57 +0000 |
| commit | 93ad55b7852b324a3fd7d46910b88c81deb62357 (patch) | |
| tree | e1066fe48afa3e16df6b0f9cd1f66fc5bf239831 /arch/arm64/include/asm | |
| parent | a762f4ffc3c8a434da1b712e57a80d8d10404198 (diff) | |
arm64: cpufeatures: Allow disabling of BTI from the command-line
In order to be able to disable BTI at runtime, whether it is
for testing purposes, or to work around HW issues, let's add
support for overriding the ID_AA64PFR1_EL1.BTI field.
This is further mapped on the arm64.nobti command-line alias.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: David Brazdil <dbrazdil@google.com>
Tested-by: Srinivas Ramana <sramana@codeaurora.org>
Link: https://lore.kernel.org/r/20210208095732.3267263-21-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm')
| -rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index 570f1b4ba3cc..30917b9a760b 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -819,6 +819,7 @@ 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; u32 get_kvm_ipa_limit(void); void dump_cpu_features(void); |