From nobody Fri Oct 10 16:18:15 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C3CC52D4B78 for ; Fri, 13 Jun 2025 11:12:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749813147; cv=none; b=A+E7g1e1SBeycCv3a6H16VI7v6akXn9+ybj6eMLM0oitXW2JrRgTSYJXKOVp6VoJeo8ImYV6X1HKHPBUA8HzAp/092sRo3B91+xmBAQFPYowFoO+cFjXaUDDgUxh5juFfEFMOm4eCgWsNIiHeGP80/cr/TVymeRZlaM2gsc9YOU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749813147; c=relaxed/simple; bh=dRxBMxxhLreYClrZY8rUIKdfpH7BRzMk7Jy/+D1IEdM=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=H+1S1v2QKjwNAc+zxxbJV/GGLNWQp5DYT287Ap/2EwF2gLwklvtSFmtQ92k7qNVPwKpcYwDPgA0B9aWfnKxVewDEUvN4kS1YGG8LnFNB3/cn++MsWN5rRWDL6i+Zlsa0kgGrHK2GhTZvrU6pC6bTqUoEFwLf0OmSHF73euf+pHg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C59661D70; Fri, 13 Jun 2025 04:12:04 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EC6F63F59E; Fri, 13 Jun 2025 04:12:23 -0700 (PDT) From: Suzuki K Poulose To: linux-arm-kernel@lists.infradead.org Cc: will@kernel.org, catalin.marinas@arm.com, sami.mujawar@arm.com, aneesh.kumar@kernel.org, steven.price@arm.com, linux-kernel@vger.kernel.org, sudeep.holla@arm.com, Suzuki K Poulose Subject: [PATCH 3/3] arm64: acpi: Enable ACPI CCEL support Date: Fri, 13 Jun 2025 12:11:53 +0100 Message-ID: <20250613111153.1548928-4-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250613111153.1548928-1-suzuki.poulose@arm.com> References: <20250613111153.1548928-1-suzuki.poulose@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" ACPI CCEL memory area is reported as Non-Volatile storage area. Map it as PAGE_KERNEL. Cc: Sami Mujawar Cc: Will Deacon Cc: Catalin Marinas Cc: "Aneesh Kumar K.V" Cc: Steven Price Cc: Sudeep Holla Signed-off-by: Suzuki K Poulose Reviewed-by: Gavin Shan --- arch/arm64/kernel/acpi.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c index b9a66fc146c9..f52439d411a0 100644 --- a/arch/arm64/kernel/acpi.c +++ b/arch/arm64/kernel/acpi.c @@ -356,6 +356,11 @@ void __iomem *acpi_os_ioremap(acpi_physical_address ph= ys, acpi_size size) prot =3D PAGE_KERNEL_RO; break; =20 + case EFI_ACPI_MEMORY_NVS: + /* Non-volatile storage, required for CCEL */ + prot =3D PAGE_KERNEL; + break; + case EFI_ACPI_RECLAIM_MEMORY: /* * ACPI reclaim memory is used to pass firmware tables --=20 2.43.0