From: Gavin Shan <gshan@redhat.com>
To: Suzuki K Poulose <suzuki.poulose@arm.com>,
linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev,
catalin.marinas@arm.com, will@kernel.org,
aneesh.kumar@kernel.org, sami.mujawar@arm.com,
sudeep.holla@arm.com, steven.price@arm.com
Subject: Re: [PATCH v2 3/3] arm64: acpi: Enable ACPI CCEL support
Date: Wed, 17 Sep 2025 13:56:55 +1000 [thread overview]
Message-ID: <4e618201-05dd-46e1-8ca8-3956dc738300@redhat.com> (raw)
In-Reply-To: <20250908223519.1759020-4-suzuki.poulose@arm.com>
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@arm.com>
> Cc: Will Deacon <will@kernel.org>
> Cc: Catalin Marinas <catalin.marinas@arm.com>
> Cc: Aneesh Kumar K.V <aneesh.kumar@kernel.org>
> Cc: Steven Price <steven.price@arm.com>
> Cc: Sudeep Holla <sudeep.holla@arm.com>
> Cc: Gavin Shan <gshan@redhat.com>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.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@redhat.com>
next prev parent reply other threads:[~2025-09-17 3:57 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-08 22:35 [PATCH v2 0/3] arm64: realm: Add support for encrypted data from firmware Suzuki K Poulose
2025-09-08 22:35 ` [PATCH v2 1/3] arm64: realm: ioremap: Allow mapping memory as encrypted Suzuki K Poulose
2025-09-08 22:35 ` [PATCH v2 2/3] arm64: Enable EFI secret area Securityfs support Suzuki K Poulose
2025-09-08 22:35 ` [PATCH v2 3/3] arm64: acpi: Enable ACPI CCEL support Suzuki K Poulose
2025-09-17 3:56 ` Gavin Shan [this message]
2025-09-18 12:31 ` Will Deacon
2025-09-18 12:35 ` Suzuki K Poulose
2025-09-16 15:35 ` [PATCH v2 0/3] arm64: realm: Add support for encrypted data from firmware Sami Mujawar
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