* [PATCH] arm64: kpti: Add KRYO{3,4}XX silver CPU cores to kpti safelist
@ 2020-06-24 12:34 Sai Prakash Ranjan
2020-06-24 13:54 ` Doug Anderson
2020-06-24 13:54 ` [PATCH] arm64: kpti: Add KRYO{3, 4}XX " Will Deacon
0 siblings, 2 replies; 3+ messages in thread
From: Sai Prakash Ranjan @ 2020-06-24 12:34 UTC (permalink / raw)
To: Will Deacon, Catalin Marinas, Marc Zyngier, Mark Rutland,
Suzuki K Poulose, Douglas Anderson
Cc: linux-kernel, linux-arm-kernel, linux-arm-msm, Stephen Boyd,
Jeffrey Hugo, Sai Prakash Ranjan
QCOM KRYO{3,4}XX silver/LITTLE CPU cores are based on Cortex-A55
and are meltdown safe, hence add them to kpti_safe_list[].
Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
---
arch/arm64/kernel/cpufeature.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 4ae41670c2e6..9f63053a63a9 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1290,6 +1290,8 @@ static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
MIDR_ALL_VERSIONS(MIDR_NVIDIA_CARMEL),
+ MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_3XX_SILVER),
+ MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_SILVER),
{ /* sentinel */ }
};
char const *str = "kpti command line option";
base-commit: cfafde3c949cae39483639c03c5da5fd91bb234e
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH] arm64: kpti: Add KRYO{3,4}XX silver CPU cores to kpti safelist
2020-06-24 12:34 [PATCH] arm64: kpti: Add KRYO{3,4}XX silver CPU cores to kpti safelist Sai Prakash Ranjan
@ 2020-06-24 13:54 ` Doug Anderson
2020-06-24 13:54 ` [PATCH] arm64: kpti: Add KRYO{3, 4}XX " Will Deacon
1 sibling, 0 replies; 3+ messages in thread
From: Doug Anderson @ 2020-06-24 13:54 UTC (permalink / raw)
To: Sai Prakash Ranjan
Cc: Will Deacon, Catalin Marinas, Marc Zyngier, Mark Rutland,
Suzuki K Poulose, LKML, Linux ARM, linux-arm-msm, Stephen Boyd,
Jeffrey Hugo
Hi,
On Wed, Jun 24, 2020 at 5:34 AM Sai Prakash Ranjan
<saiprakash.ranjan@codeaurora.org> wrote:
>
> QCOM KRYO{3,4}XX silver/LITTLE CPU cores are based on Cortex-A55
> and are meltdown safe, hence add them to kpti_safe_list[].
>
> Signed-off-by: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>
> ---
> arch/arm64/kernel/cpufeature.c | 2 ++
> 1 file changed, 2 insertions(+)
Reported-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] arm64: kpti: Add KRYO{3, 4}XX silver CPU cores to kpti safelist
2020-06-24 12:34 [PATCH] arm64: kpti: Add KRYO{3,4}XX silver CPU cores to kpti safelist Sai Prakash Ranjan
2020-06-24 13:54 ` Doug Anderson
@ 2020-06-24 13:54 ` Will Deacon
1 sibling, 0 replies; 3+ messages in thread
From: Will Deacon @ 2020-06-24 13:54 UTC (permalink / raw)
To: Catalin Marinas, Mark Rutland, Douglas Anderson,
Sai Prakash Ranjan, Marc Zyngier, Suzuki K Poulose
Cc: kernel-team, Will Deacon, linux-arm-msm, linux-arm-kernel,
linux-kernel, Jeffrey Hugo, Stephen Boyd
On Wed, 24 Jun 2020 18:04:06 +0530, Sai Prakash Ranjan wrote:
> QCOM KRYO{3,4}XX silver/LITTLE CPU cores are based on Cortex-A55
> and are meltdown safe, hence add them to kpti_safe_list[].
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: kpti: Add KRYO{3, 4}XX silver CPU cores to kpti safelist
https://git.kernel.org/arm64/c/f4617be35b4b
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
^ permalink raw reply [flat|nested] 3+ messages in thread
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2020-06-24 12:34 [PATCH] arm64: kpti: Add KRYO{3,4}XX silver CPU cores to kpti safelist Sai Prakash Ranjan
2020-06-24 13:54 ` Doug Anderson
2020-06-24 13:54 ` [PATCH] arm64: kpti: Add KRYO{3, 4}XX " Will Deacon
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