* [PATCHv2] arm64: Add KRYO{3,4}XX CPU cores to spectre-v2 safe list
@ 2020-01-16 20:03 Sai Prakash Ranjan
2020-01-17 2:26 ` [PATCHv2] arm64: Add KRYO{3, 4}XX " Stephen Boyd
0 siblings, 1 reply; 2+ messages in thread
From: Sai Prakash Ranjan @ 2020-01-16 20:03 UTC (permalink / raw)
To: Will Deacon, Catalin Marinas, Marc Zyngier, Andre Przywara,
Mark Rutland, Douglas Anderson
Cc: Sai Prakash Ranjan, Jeffrey Hugo, linux-arm-msm, linux-kernel,
Bjorn Andersson, Matthias Kaehlcke, Stephen Boyd,
linux-arm-kernel
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
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCHv2] arm64: Add KRYO{3, 4}XX CPU cores to spectre-v2 safe list
2020-01-16 20:03 [PATCHv2] arm64: Add KRYO{3,4}XX CPU cores to spectre-v2 safe list Sai Prakash Ranjan
@ 2020-01-17 2:26 ` Stephen Boyd
0 siblings, 0 replies; 2+ messages in thread
From: Stephen Boyd @ 2020-01-17 2:26 UTC (permalink / raw)
To: Andre Przywara, Catalin Marinas, Douglas Anderson, Marc Zyngier,
Mark Rutland, Sai Prakash Ranjan, Will Deacon
Cc: Sai Prakash Ranjan, Jeffrey Hugo, linux-arm-msm, linux-kernel,
Bjorn Andersson, Matthias Kaehlcke, linux-arm-kernel
Quoting Sai Prakash Ranjan (2020-01-16 12:03:53)
> 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>
> ---
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Tested-by: Stephen Boyd <swboyd@chromium.org>
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2020-01-17 2:26 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-16 20:03 [PATCHv2] arm64: Add KRYO{3,4}XX CPU cores to spectre-v2 safe list Sai Prakash Ranjan
2020-01-17 2:26 ` [PATCHv2] arm64: Add KRYO{3, 4}XX " Stephen Boyd
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).