Re: [PATCH v2 3/3] arm64: acpi: Enable ACPI CCEL support

[Gavin Shan]

On 9/9/25 8:35 AM, Suzuki K Poulose wrote:
> Add support for ACPI CCEL by handling the EfiACPIMemoryNVS type memory.
> As per UEFI specifications NVS memory is reserved for Firmware use even
> after exiting boot services. Thus map the region as read-only.
>
> Cc: Sami Mujawar <sami.mujawar@xxxxxxx>
> Cc: Will Deacon <will@xxxxxxxxxx>
> Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
> Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxx>
> Cc: Steven Price <steven.price@xxxxxxx>
> Cc: Sudeep Holla <sudeep.holla@xxxxxxx>
> Cc: Gavin Shan <gshan@xxxxxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> ---
> Changes since v1
>   - Map NVS region as read-only, update comment to clarify that the region
>     is reserved for firmware use.
>
> ---
>   arch/arm64/kernel/acpi.c | 11 +++++++++++
>   1 file changed, 11 insertions(+)

Reviewed-by: Gavin Shan <gshan@xxxxxxxxxx>