* [PATCH] arm64: kpti: Add NVIDIA's Carmel core to the KPTI whitelist
@ 2019-11-05 18:45 Rich Wiley
2019-11-06 11:31 ` Catalin Marinas
0 siblings, 1 reply; 2+ messages in thread
From: Rich Wiley @ 2019-11-05 18:45 UTC (permalink / raw)
To: linux-arm-kernel; +Cc: catalin.marinas, will.deacon, Rich Wiley
NVIDIA Carmel CPUs don't implement ID_AA64PFR0_EL1.CSV3 but
aren't susceptible to Meltdown, so add Carmel to kpti_safe_list[].
Signed-off-by: Rich Wiley <rwiley@nvidia.com>
---
arch/arm64/kernel/cpufeature.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index 9323bcc..2ec60eb 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -976,6 +976,7 @@ static bool unmap_kernel_at_el0(const struct arm64_cpu_capabilities *entry,
MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
+ MIDR_ALL_VERSIONS(MIDR_NVIDIA_CARMEL),
{ /* sentinel */ }
};
char const *str = "kpti command line option";
--
2.7.4
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^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] arm64: kpti: Add NVIDIA's Carmel core to the KPTI whitelist
2019-11-05 18:45 [PATCH] arm64: kpti: Add NVIDIA's Carmel core to the KPTI whitelist Rich Wiley
@ 2019-11-06 11:31 ` Catalin Marinas
0 siblings, 0 replies; 2+ messages in thread
From: Catalin Marinas @ 2019-11-06 11:31 UTC (permalink / raw)
To: Rich Wiley; +Cc: will.deacon, linux-arm-kernel
On Tue, Nov 05, 2019 at 10:45:10AM -0800, Rich Wiley wrote:
> NVIDIA Carmel CPUs don't implement ID_AA64PFR0_EL1.CSV3 but
> aren't susceptible to Meltdown, so add Carmel to kpti_safe_list[].
>
> Signed-off-by: Rich Wiley <rwiley@nvidia.com>
Queued for 5.5. Thanks.
--
Catalin
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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2019-11-05 18:45 [PATCH] arm64: kpti: Add NVIDIA's Carmel core to the KPTI whitelist Rich Wiley
2019-11-06 11:31 ` Catalin Marinas
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