From: Douglas Anderson <dianders@chromium.org> stable inclusion from stable-v6.6.88 commit 1577657f5efc910fd2a100992e474b1b6c746dd5 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IC8J7I Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit ed1ce841245d8febe3badf51c57e81c3619d0a1d upstream. Qualcomm Kryo 400-series Gold cores have a derivative of an ARM Cortex A76 in them. Since A76 needs Spectre mitigation via looping then the Kyro 400-series Gold cores also need Spectre mitigation via looping. Qualcomm has confirmed that the proper "k" value for Kryo 400-series Gold cores is 24. Fixes: 558c303c9734 ("arm64: Mitigate spectre style branch history side channels") Cc: stable@vger.kernel.org Cc: Scott Bauer <sbauer@quicinc.com> Signed-off-by: Douglas Anderson <dianders@chromium.org> Acked-by: Trilok Soni <quic_tsoni@quicinc.com> Link: https://lore.kernel.org/r/20250107120555.v4.1.Ie4ef54abe02e7eb0eee50f8305757... Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Pu Lehui <pulehui@huawei.com> --- 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 4bca7ad7b5e3..79f1483e6129 100644 --- a/arch/arm64/kernel/proton-pack.c +++ b/arch/arm64/kernel/proton-pack.c @@ -866,6 +866,7 @@ u8 spectre_bhb_loop_affected(int scope) MIDR_ALL_VERSIONS(MIDR_CORTEX_A76), MIDR_ALL_VERSIONS(MIDR_CORTEX_A77), MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1), + MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_GOLD), {}, }; static const struct midr_range spectre_bhb_k11_list[] = { -- 2.34.1