linux-kernel - [PATCH 3/4] arm64: proton-pack: Add KRYO2XX silver CPUs to spectre-v2 safe-list

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Date:   Thu,  5 Nov 2020 00:22:12 +0100
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     phone-devel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht, martin.botka@...ainline.org,
        angelogioacchino.delregno@...ainline.org,
        marijn.suijten@...ainline.org,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Stephen Boyd <swboyd@...omium.org>,
        Rob Herring <robh@...nel.org>, Marc Zyngier <maz@...nel.org>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Steven Price <steven.price@....com>,
        Mark Brown <broonie@...nel.org>,
        Andrew Scull <ascull@...gle.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Amit Daniel Kachhap <amit.kachhap@....com>,
        Ionela Voinescu <ionela.voinescu@....com>,
        Kristina Martsenko <kristina.martsenko@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] arm64: proton-pack: Add KRYO2XX silver CPUs to spectre-v2 safe-list

KRYO2XX silver (LITTLE) CPUs are based on Cortex-A53
and they are not affected by spectre-v2.

Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
---
 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 c18eb7d41274..f6e4e3737405 100644
--- a/arch/arm64/kernel/proton-pack.c
+++ b/arch/arm64/kernel/proton-pack.c
@@ -118,6 +118,7 @@ static enum mitigation_state spectre_v2_get_cpu_hw_mitigation_state(void)
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
 		MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53),
 		MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
+		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 */ }
-- 
2.29.2