From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1257323D281 for ; Wed, 17 Sep 2025 03:57:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758081427; cv=none; b=nrdWM+RMUSIvUF0AA2/MCvDasbc1Bw02Df/J6DW0QV5uqrXT9IY3FoBFxe91JL0xs/f1sA4q7V4Xf8GvzNQm04k/wu6ZFDMU1t2D7o1n3VlIYyaXUyjV8WWiqX+UM9sYxVXl0HdS5LPx+qQv6kEHprBllLY1HxNLv6FwZ9t3ewM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758081427; c=relaxed/simple; bh=BK2vt+oVFag+vs2ay9fYOX68fPEFL7tR8PLO+nSyEB8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=B+mJiY02+rPbyDQpK48E4UULyHRvebWAaUuGnrhiuE34KwKVC0Ao5zkSwvqQ5P39z9GbC12R/yFkRWpDiX/oZyIsxYnsRYpRSXhCaKo6DGjkawzehXpXMC2Bt5ZUETJ1KgZqOHCzT7suXb5mUMceYaHX+dfvBxNK/HgIttSNrfg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=Q5mMTb8o; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Q5mMTb8o" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1758081425; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=XTGV/Lpx58Ur4YHkEVEE/DLD/lQA5hgEBF0FsirS0AA=; b=Q5mMTb8o5tAQu1gUCc+kS4QOA9+ygq5Dp/d2t6kxaKfUR4vIGNVFyIDlwYl1I5Ah/nG+c/ pyUkrU74gvZoEb8MkGkP3kWcMnWq/meMrICFf731QOO+tOLwUqcrlq6rE/+Z+QoaBJgmyb SQwBJ83Bfhqg6VfWFDIwCV6rNR7DKOE= Received: from mail-pf1-f198.google.com (mail-pf1-f198.google.com [209.85.210.198]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-156-LhD66Vn2Pjm0By07QaE8oA-1; Tue, 16 Sep 2025 23:57:03 -0400 X-MC-Unique: LhD66Vn2Pjm0By07QaE8oA-1 X-Mimecast-MFC-AGG-ID: LhD66Vn2Pjm0By07QaE8oA_1758081422 Received: by mail-pf1-f198.google.com with SMTP id d2e1a72fcca58-77260707951so8785872b3a.0 for ; Tue, 16 Sep 2025 20:57:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758081422; x=1758686222; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=XTGV/Lpx58Ur4YHkEVEE/DLD/lQA5hgEBF0FsirS0AA=; b=P8bpwfXScQsS6vumtoI4rwuP+RmkH7uVuFjQywpYNOhzYR/lcckriarviPDEhwC2XG P+Z3BVffqKfMM9wAhXnZpE+K95swNGRZ9juFa6thWAll/o29syoIn0uI6/c6GvzbCDkL AOwpQ9s5v8C/DTRVCsAi5h/0uUKXHud91J1zLEne2Hv4mOX1rIGXKqkcARe9e++LDZ// pdYEIrAv9p23T/lDcaM2l2xcEpf/p6lamqBdtcFQkNGiKzMGiq2XwWzxaDk6+COEinAO U6BTpJALoxtQdSBnQ66fRADcX5Pdy22BEJhPgXrj3g6z7D2eKxFj9ti1SFBRYTNLXiNQ 4B1w== X-Gm-Message-State: AOJu0YxiTHLNRFstTTJ9aQLSK7E0HcZvUk22D7TfmNdzNch/dQRLyL5k 3nClcNdyLMvdsXieIFrzs+gj+GWtpBbPDXH2C221z1vj09RIQDZEOHIwdZFSkGCfmCTk1nglQSu wYHqwhx3CMiY3TWM3gn8B3WCdefk5IERrU5C6B/JTTZbmk2Q9SH2pxCrkpmLaazGBcg== X-Gm-Gg: ASbGnctzIZ9rfKeXGd7cpKleOhTDFeQjdh5CHousV4QB1eeuc+vmmEVQE23EKR3EVwz noPGFV+h+ovOC0zf4OrlXpDnt0zv7clY398Qh2li1wYRIVltMW/CJwkoS5ggwGpnFzFO/jHAqMo 45eWOqywRJCUWnANtq8+6ScdoOp+r0GFAcVHyuvk6TrWQvXlelR9jOAUwBCzyn/u01j8Do3PTTU 1G8L3sZ7TPnGJtDQfQVnzoF21+ri/useLEx1q3+t8p/uaFqLFCTo6blDeKS48EFin7yLW2elu/3 Fr1Gc/fjn4mAt329NiYAqfFcZT7+f8Zj+y8082UNA1HOyBgOD4UicM8W1HJ8RhHzQ6LHEVA6FGs wz1RB X-Received: by 2002:a05:6a20:430d:b0:252:f0b6:bde with SMTP id adf61e73a8af0-27aa2e9fe25mr909370637.24.1758081422419; Tue, 16 Sep 2025 20:57:02 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGMc2O27tB3E/QqyAooDB3y7jr/wt0/Bey9oUtK/NtFfEn70CrDz7Artb0At8viujU7do8N/g== X-Received: by 2002:a05:6a20:430d:b0:252:f0b6:bde with SMTP id adf61e73a8af0-27aa2e9fe25mr909353637.24.1758081422069; Tue, 16 Sep 2025 20:57:02 -0700 (PDT) Received: from [192.168.68.51] (n175-34-62-5.mrk21.qld.optusnet.com.au. [175.34.62.5]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-77613e4308csm14709454b3a.73.2025.09.16.20.56.57 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Sep 2025 20:57:01 -0700 (PDT) Message-ID: <4e618201-05dd-46e1-8ca8-3956dc738300@redhat.com> Date: Wed, 17 Sep 2025 13:56:55 +1000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 3/3] arm64: acpi: Enable ACPI CCEL support To: Suzuki K Poulose , 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 References: <20250908223519.1759020-1-suzuki.poulose@arm.com> <20250908223519.1759020-4-suzuki.poulose@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20250908223519.1759020-4-suzuki.poulose@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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 > Cc: Will Deacon > Cc: Catalin Marinas > Cc: Aneesh Kumar K.V > Cc: Steven Price > Cc: Sudeep Holla > Cc: Gavin Shan > Signed-off-by: Suzuki K Poulose > --- > 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