diff options
| author | Shanker Donthineni <shankerd@codeaurora.org> | 2018-01-05 14:28:59 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-02-16 20:22:54 +0100 |
| commit | 9b26a45c34e40575e53287365be7571b9cda21ab (patch) | |
| tree | 63085b5843ca9881b6cb627498da706a7f72a2e2 /arch/arm64/include/asm/kvm_asm.h | |
| parent | 48993dfa1af8c719576a18c0e2ca1d611297e34e (diff) | |
arm64: Implement branch predictor hardening for Falkor
Commit ec82b567a74f upstream.
Falkor is susceptible to branch predictor aliasing and can
theoretically be attacked by malicious code. This patch
implements a mitigation for these attacks, preventing any
malicious entries from affecting other victim contexts.
Signed-off-by: Shanker Donthineni <shankerd@codeaurora.org>
[will: fix label name when !CONFIG_KVM and remove references to MIDR_FALKOR]
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/arm64/include/asm/kvm_asm.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 26a64d0f9ab9..a7ef5a051911 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -66,6 +66,8 @@ extern u32 __kvm_get_mdcr_el2(void); extern u32 __init_stage2_translation(void); +extern void __qcom_hyp_sanitize_btac_predictors(void); + #endif #endif /* __ARM_KVM_ASM_H__ */ |