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

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Message-ID: <4e618201-05dd-46e1-8ca8-3956dc738300@redhat.com>
Date: Wed, 17 Sep 2025 13:56:55 +1000
From: Gavin Shan <gshan@...hat.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
 linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org, linux-coco@...ts.linux.dev,
 catalin.marinas@....com, will@...nel.org, aneesh.kumar@...nel.org,
 sami.mujawar@....com, sudeep.holla@....com, steven.price@....com
Subject: Re: [PATCH v2 3/3] arm64: acpi: Enable ACPI CCEL support

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@....com>
> Cc: Will Deacon <will@...nel.org>
> Cc: Catalin Marinas <catalin.marinas@....com>
> Cc: Aneesh Kumar K.V <aneesh.kumar@...nel.org>
> Cc: Steven Price <steven.price@....com>
> Cc: Sudeep Holla <sudeep.holla@....com>
> Cc: Gavin Shan <gshan@...hat.com>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
> ---
> 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@...hat.com>