Qualcomm Kryo 200-series Gold cores appear to have a derivative of an ARM Cortex A73 in them. Since A73 needs Spectre mitigation then the Kyro 200-series Gold cores also should need Spectre mitigation. Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx> --- I don't really have any good way to test this patch but it seems likely it's needed. If nothing else the claim is that that Qualcomm Kyro 280 CPU is vulnerable [1] but I don't see any mitigations in the kernel for it. NOTE: presumably this patch won't actually do much on its own because (I believe) it requires a firmware update to go with it. [1] https://spectreattack.com/spectre.pdf arch/arm64/kernel/proton-pack.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c index e149efadff20..0437be7c83bc 100644 --- a/arch/arm64/kernel/proton-pack.c +++ b/arch/arm64/kernel/proton-pack.c @@ -925,6 +925,7 @@ static bool is_spectre_bhb_fw_affected(int scope) static const struct midr_range spectre_bhb_firmware_mitigated_list[] = { MIDR_ALL_VERSIONS(MIDR_CORTEX_A73), MIDR_ALL_VERSIONS(MIDR_CORTEX_A75), + MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_2XX_GOLD), {}, }; bool cpu_in_list = is_midr_in_range_list(read_cpuid_id(), -- 2.47.0.338.g60cca15819-goog
