* [PATCH V3] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs
@ 2022-05-12 11:01 Shreyas K K
2022-05-12 11:05 ` Sai Prakash Ranjan
2022-05-12 13:05 ` Will Deacon
0 siblings, 2 replies; 3+ messages in thread
From: Shreyas K K @ 2022-05-12 11:01 UTC (permalink / raw)
To: Will Deacon, Catalin Marinas, Marc Zyngier, Suzuki K Poulose,
Mark Rutland
Cc: Andre Przywara, linux-kernel, linux-arm-kernel, linux-arm-msm,
Jeffrey Hugo, Shreyas K K, Sai Prakash Ranjan, Rajendra Nayak,
Prasanna Kumar
Add KRYO4XX gold/big cores to the list of CPUs that need the
repeat TLBI workaround. Apply this to the affected
KRYO4XX cores (rcpe to rfpe).
The variant and revision bits are implementation defined and are
different from the their Cortex CPU counterparts on which they are
based on, i.e., (r0p0 to r3p0) is equivalent to (rcpe to rfpe).
Signed-off-by: Shreyas K K <quic_shrekk@quicinc.com>
---
Changes in v2:
* r2p0 and r3p0 are also affected by this erratum.
* Add the corresponding cores (repe and rfpe) making the range rcpe to rfpe.
Changes in v3:
* Fix the CPU model macro.
Documentation/arm64/silicon-errata.rst | 3 +++
arch/arm64/kernel/cpu_errata.c | 2 ++
2 files changed, 5 insertions(+)
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index 466cb9e89047..d27db84d585e 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -189,6 +189,9 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+
| Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1024718 |
+----------------+-----------------+-----------------+-----------------------------+
+| Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1286807 |
++----------------+-----------------+-----------------+-----------------------------+
+
+----------------+-----------------+-----------------+-----------------------------+
| Fujitsu | A64FX | E#010001 | FUJITSU_ERRATUM_010001 |
+----------------+-----------------+-----------------+-----------------------------+
diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
index 4c9b5b4b7a0b..a0f3d0aaa3c5 100644
--- a/arch/arm64/kernel/cpu_errata.c
+++ b/arch/arm64/kernel/cpu_errata.c
@@ -208,6 +208,8 @@ static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
#ifdef CONFIG_ARM64_ERRATUM_1286807
{
ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
+ /* Kryo4xx Gold (rcpe to rfpe) => (r0p0 to r3p0) */
+ ERRATA_MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xe),
},
#endif
{},
--
2.17.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH V3] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs
2022-05-12 11:01 [PATCH V3] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs Shreyas K K
@ 2022-05-12 11:05 ` Sai Prakash Ranjan
2022-05-12 13:05 ` Will Deacon
1 sibling, 0 replies; 3+ messages in thread
From: Sai Prakash Ranjan @ 2022-05-12 11:05 UTC (permalink / raw)
To: Shreyas K K, Will Deacon, Catalin Marinas, Marc Zyngier,
Suzuki K Poulose, Mark Rutland
Cc: Andre Przywara, linux-kernel, linux-arm-kernel, linux-arm-msm,
Jeffrey Hugo, Rajendra Nayak, Prasanna Kumar
On 5/12/2022 4:31 PM, Shreyas K K wrote:
> Add KRYO4XX gold/big cores to the list of CPUs that need the
> repeat TLBI workaround. Apply this to the affected
> KRYO4XX cores (rcpe to rfpe).
>
> The variant and revision bits are implementation defined and are
> different from the their Cortex CPU counterparts on which they are
> based on, i.e., (r0p0 to r3p0) is equivalent to (rcpe to rfpe).
>
> Signed-off-by: Shreyas K K <quic_shrekk@quicinc.com>
> ---
>
> Changes in v2:
> * r2p0 and r3p0 are also affected by this erratum.
> * Add the corresponding cores (repe and rfpe) making the range rcpe to rfpe.
>
> Changes in v3:
> * Fix the CPU model macro.
>
> Documentation/arm64/silicon-errata.rst | 3 +++
> arch/arm64/kernel/cpu_errata.c | 2 ++
> 2 files changed, 5 insertions(+)
>
> diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
> index 466cb9e89047..d27db84d585e 100644
> --- a/Documentation/arm64/silicon-errata.rst
> +++ b/Documentation/arm64/silicon-errata.rst
> @@ -189,6 +189,9 @@ stable kernels.
> +----------------+-----------------+-----------------+-----------------------------+
> | Qualcomm Tech. | Kryo4xx Silver | N/A | ARM64_ERRATUM_1024718 |
> +----------------+-----------------+-----------------+-----------------------------+
> +| Qualcomm Tech. | Kryo4xx Gold | N/A | ARM64_ERRATUM_1286807 |
> ++----------------+-----------------+-----------------+-----------------------------+
> +
> +----------------+-----------------+-----------------+-----------------------------+
> | Fujitsu | A64FX | E#010001 | FUJITSU_ERRATUM_010001 |
> +----------------+-----------------+-----------------+-----------------------------+
> diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c
> index 4c9b5b4b7a0b..a0f3d0aaa3c5 100644
> --- a/arch/arm64/kernel/cpu_errata.c
> +++ b/arch/arm64/kernel/cpu_errata.c
> @@ -208,6 +208,8 @@ static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
> #ifdef CONFIG_ARM64_ERRATUM_1286807
> {
> ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
> + /* Kryo4xx Gold (rcpe to rfpe) => (r0p0 to r3p0) */
> + ERRATA_MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xe),
> },
> #endif
> {},
Reviewed-by: Sai Prakash Ranjan <quic_saipraka@quicinc.com>
Thanks,
Sai
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH V3] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs
2022-05-12 11:01 [PATCH V3] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs Shreyas K K
2022-05-12 11:05 ` Sai Prakash Ranjan
@ 2022-05-12 13:05 ` Will Deacon
1 sibling, 0 replies; 3+ messages in thread
From: Will Deacon @ 2022-05-12 13:05 UTC (permalink / raw)
To: Marc Zyngier, Mark Rutland, Suzuki K Poulose, Catalin Marinas,
Shreyas K K
Cc: kernel-team, Will Deacon, linux-kernel, Prasanna Kumar,
linux-arm-msm, Andre Przywara, linux-arm-kernel,
Sai Prakash Ranjan, Jeffrey Hugo, Rajendra Nayak
On Thu, 12 May 2022 16:31:34 +0530, Shreyas K K wrote:
> Add KRYO4XX gold/big cores to the list of CPUs that need the
> repeat TLBI workaround. Apply this to the affected
> KRYO4XX cores (rcpe to rfpe).
>
> The variant and revision bits are implementation defined and are
> different from the their Cortex CPU counterparts on which they are
> based on, i.e., (r0p0 to r3p0) is equivalent to (rcpe to rfpe).
>
> [...]
Applied to arm64 (for-next/fixes), thanks!
[1/1] arm64: Enable repeat tlbi workaround on KRYO4XX gold CPUs
https://git.kernel.org/arm64/c/51f559d66527
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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2022-05-12 11:05 ` Sai Prakash Ranjan
2022-05-12 13:05 ` Will Deacon
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