From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
To: Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>,
Andre Przywara <andre.przywara@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
Douglas Anderson <dianders@chromium.org>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org, Stephen Boyd <swboyd@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Jeffrey Hugo <jhugo@codeaurora.org>,
Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
Subject: [PATCHv2] arm64: Add KRYO{3,4}XX CPU cores to spectre-v2 safe list
Date: Fri, 17 Jan 2020 01:33:53 +0530 [thread overview]
Message-ID: <7a8c9a5a39d9d95b9bfca1de3b1f63489d3a4d2d.1579203281.git.saiprakash.ranjan@codeaurora.org> (raw)
KRYO3XX silver CPU cores and KRYO4XX silver, gold CPU cores
are not affected by Spectre variant 2. Add them to spectre_v2
safe list to correct ARM_SMCCC_ARCH_WORKAROUND_1 warning and
vulnerability sysfs value.
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
---
Changes since v1:
- Dropped QCOM_CPU_PART_KRYO_4XX_GOLD as CSV2 is set
---
arch/arm64/include/asm/cputype.h | 4 ++++
arch/arm64/kernel/cpu_errata.c | 2 ++
2 files changed, 6 insertions(+)
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h
index aca07c2f6e6e..a87a93f67671 100644
--- a/arch/arm64/include/asm/cputype.h
+++ b/arch/arm64/include/asm/cputype.h
@@ -85,6 +85,8 @@
#define QCOM_CPU_PART_FALKOR_V1 0x800
#define QCOM_CPU_PART_FALKOR 0xC00
#define QCOM_CPU_PART_KRYO 0x200
+#define QCOM_CPU_PART_KRYO_3XX_SILVER 0x803
+#define QCOM_CPU_PART_KRYO_4XX_SILVER 0x805
#define NVIDIA_CPU_PART_DENVER 0x003
#define NVIDIA_CPU_PART_CARMEL 0x004
@@ -111,6 +113,8 @@
#define MIDR_QCOM_FALKOR_V1 MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_FALKOR_V1)
#define MIDR_QCOM_FALKOR MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_FALKOR)
#define MIDR_QCOM_KRYO MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_KRYO)
+#define MIDR_QCOM_KRYO_3XX_SILVER MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_KRYO_3XX_SILVER)
+#define MIDR_QCOM_KRYO_4XX_SILVER MIDR_CPU_MODEL(ARM_CPU_IMP_QCOM, QCOM_CPU_PART_KRYO_4XX_SILVER)
#define MIDR_NVIDIA_DENVER MIDR_CPU_MODEL(ARM_CPU_IMP_NVIDIA, NVIDIA_CPU_PART_DENVER)
#define MIDR_NVIDIA_CARMEL MIDR_CPU_MODEL(ARM_CPU_IMP_NVIDIA, NVIDIA_CPU_PART_CARMEL)
#define MIDR_FUJITSU_A64FX MIDR_CPU_MODEL(ARM_CPU_IMP_FUJITSU, FUJITSU_CPU_PART_A64FX)
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 85f4bec22f6d..d661c7d0e6e2 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -548,6 +548,8 @@ static const struct midr_range spectre_v2_safe_list[] = {
MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53),
MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
+ MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_3XX_SILVER),
+ MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_SILVER),
{ /* sentinel */ }
};
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
next reply other threads:[~2020-01-16 20:04 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-16 20:03 Sai Prakash Ranjan [this message]
2020-01-17 2:26 ` [PATCHv2] arm64: Add KRYO{3,4}XX CPU cores to spectre-v2 safe list Stephen Boyd
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