linux-kernel - [PATCH 6/6] arm64: errata: Add QCOM_KRYO_6XX_GOLD/PRIME to the spectre_bhb_k32

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241209094310.6.I722621804be859e4ae4b7479ce191c5e3367b37c@changeid>
Date: Mon,  9 Dec 2024 09:43:16 -0800
From: Douglas Anderson <dianders@...omium.org>
To: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>
Cc: Julius Werner <jwerner@...omium.org>,
	Jeffrey Hugo <quic_jhugo@...cinc.com>,
	Roxana Bradescu <roxabee@...gle.com>,
	bjorn.andersson@....qualcomm.com,
	linux-arm-kernel@...ts.infradead.org,
	Trilok Soni <quic_tsoni@...cinc.com>,
	linux-arm-msm@...r.kernel.org,
	Douglas Anderson <dianders@...omium.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 6/6] arm64: errata: Add QCOM_KRYO_6XX_GOLD/PRIME to the spectre_bhb_k32_list

Qualcomm Kryo 600-series Gold cores appear to have a derivative of an
ARM Cortex A78 / ARM Cortex X1 in them. Since these need Spectre
mitigation then the Kyro 600-series Gold/Prime cores also should need
Spectre mitigation.

Signed-off-by: Douglas Anderson <dianders@...omium.org>
---
Yes. I know. This patch DOESN'T COMPILE because
MIDR_QCOM_KRYO_6XX_GOLD and MIDR_QCOM_KRYO_6XX_PRIME are not
defined. Those value needs to come from Qualcomm or from testing on
hardware, which I don't have. Qualcomm needs to chime in to confirm
that this Spectre mitigation is correct anyway, though. I'm including
this patch so it's obvious that I think these cores also need the
mitigation.

 arch/arm64/kernel/proton-pack.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c
index 212481726f04..67aa54017dea 100644
--- a/arch/arm64/kernel/proton-pack.c
+++ b/arch/arm64/kernel/proton-pack.c
@@ -860,6 +860,8 @@ u8 spectre_bhb_loop_affected(int scope)
 			MIDR_ALL_VERSIONS(MIDR_CORTEX_X2),
 			MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
 			MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V1),
+			MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_6XX_GOLD),
+			MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_6XX_PRIME),
 			{},
 		};
 		static const struct midr_range spectre_bhb_k24_list[] = {
-- 
2.47.0.338.g60cca15819-goog