linux-kernel - [PATCH v2 2/6] arm64: errata: Add KRYO 2XX/3XX/4XX silver cores to Spectre safe list

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20241213165201.v2.2.Iab8dbfb5c9b1e143e7a29f410bce5f9525a0ba32@changeid>
Date: Fri, 13 Dec 2024 16:52:03 -0800
From: Douglas Anderson <dianders@...omium.org>
To: Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Rutland <mark.rutland@....com>
Cc: linux-arm-msm@...r.kernel.org,
	Jeffrey Hugo <quic_jhugo@...cinc.com>,
	Julius Werner <jwerner@...omium.org>,
	linux-arm-kernel@...ts.infradead.org,
	Roxana Bradescu <roxabee@...gle.com>,
	Trilok Soni <quic_tsoni@...cinc.com>,
	bjorn.andersson@....qualcomm.com,
	Douglas Anderson <dianders@...omium.org>,
	stable@...r.kernel.org,
	James Morse <james.morse@....com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/6] arm64: errata: Add KRYO 2XX/3XX/4XX silver cores to Spectre safe list

The 2XX cores appear to be based on ARM Cortex A53. The 3XX and 4XX
cores appear to be based on ARM Cortex A55. Both of those cores appear
to be "safe" from a Spectre point of view. While it would be nice to
get confirmation from Qualcomm, it seems hard to believe that they
made big enough changes to these cores to affect the Spectre BHB
vulnerability status. Add them to the safe list.


Fixes: 558c303c9734 ("arm64: Mitigate spectre style branch history side channels")
Cc: stable@...r.kernel.org
Signed-off-by: Douglas Anderson <dianders@...omium.org>
---

Changes in v2:
- New

 arch/arm64/kernel/proton-pack.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/kernel/proton-pack.c b/arch/arm64/kernel/proton-pack.c
index 39c5573c7527..012485b75019 100644
--- a/arch/arm64/kernel/proton-pack.c
+++ b/arch/arm64/kernel/proton-pack.c
@@ -851,6 +851,9 @@ static const struct midr_range spectre_bhb_safe_list[] = {
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A35),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A53),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
+	MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_2XX_SILVER),
+	MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_3XX_SILVER),
+	MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_SILVER),
 	{},
 };
 
-- 
2.47.1.613.gc27f4b7a9f-goog