This is a note to let you know that I've just added the patch titled arm64: kpti: Add KRYO2XX gold/silver CPU cores to kpti safelist to the 5.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: arm64-kpti-add-kryo2xx-gold-silver-cpu-cores-to-kpti.patch and it can be found in the queue-5.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit f0183c49224d1bc44b305d06cfa0e7634b2331c0 Author: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx> Date: Thu Nov 5 00:22:11 2020 +0100 arm64: kpti: Add KRYO2XX gold/silver CPU cores to kpti safelist [ Upstream commit e3dd11a9f2521cecbcf30c2fd17ecc5a445dfb94 ] QCOM KRYO2XX gold (big) silver (LITTLE) CPU cores are based on Cortex-A73 and Cortex-A53 respectively and are meltdown safe, hence add them to kpti_safe_list[]. Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20201104232218.198800-3-konrad.dybcio@xxxxxxxxxxxxxx Signed-off-by: Will Deacon <will@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6424584be01e6..9d0e4afdc8caa 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -1333,6 +1333,8 @@ static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry, MIDR_ALL_VERSIONS(MIDR_CORTEX_A73), MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), MIDR_ALL_VERSIONS(MIDR_NVIDIA_CARMEL), + MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_2XX_GOLD), + MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_2XX_SILVER), MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_3XX_SILVER), MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_SILVER), { /* sentinel */ }