From nobody Thu Apr 2 17:17:50 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass(p=quarantine dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1774612167; cv=none; d=zohomail.com; s=zohoarc; b=c8l/k5R2b4XxM2/gtcigc9NLm4k8uhMqGOwzwwv20D4dEL1CyhsiYsaoXKojLWmLulnNJo0Wp6zAtYS8kmMTUg16RLJk0nrL1fq4XPU/+PKF9qm34YBdI9u6fKdOIOHIEkfU0+qTHeNXrcLXZy++Sq9PcMtsT/+4QaMzQMarbrU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1774612167; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=dvogLia3c1ViymgIXbXa1aDkmcVZpBH2hoZ4U3I42KI=; b=LseMmSnzcpQ8m2gztfrlUe49CslfK8SYiEM4PWOC08UkfR1gsqzU7PxJqdxloy2dMlD5NfldfmyTp6Jsplupebg0JGoQDlpWTPRZTE6G1a1bkRWU4dVwC47frwX7nkrlfloUuZdFNvcvvW5ed8RRYBOcxa8gtBiDPQBaLuf13TU= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=pass header.from= (p=quarantine dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 177461216700881.52201492073993; Fri, 27 Mar 2026 04:49:27 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1w65gU-0006w7-Ru; Fri, 27 Mar 2026 07:49:02 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w65gJ-0006rI-DY for qemu-devel@nongnu.org; Fri, 27 Mar 2026 07:48:51 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1w65gH-0000N2-QW for qemu-devel@nongnu.org; Fri, 27 Mar 2026 07:48:51 -0400 Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-146-_wgW-klzPE-WOoRSNXGCug-1; Fri, 27 Mar 2026 07:48:47 -0400 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 393ED18005BB; Fri, 27 Mar 2026 11:48:45 +0000 (UTC) Received: from mbawa-thinkpadt14gen5.bengluru.csb (unknown [10.74.88.10]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 2728D19560B1; Fri, 27 Mar 2026 11:48:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1774612129; 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=dvogLia3c1ViymgIXbXa1aDkmcVZpBH2hoZ4U3I42KI=; b=CtwBCzpl6bzxbxrH06bpmzrPcriaXVGgxos4lMGgqc8GLx7ByMeE7+fucxcbIf24sQGavv Nwd9QJpf/6mSi8ZzovYymPzAHhFZamqBLmCD/BAQ2ehNJ8HxnCz/sVbkWXvDUWwaPA2xdJ /XxlWjAyCqvQXGfl4KisGwujs6P+7t0= X-MC-Unique: _wgW-klzPE-WOoRSNXGCug-1 X-Mimecast-MFC-AGG-ID: _wgW-klzPE-WOoRSNXGCug_1774612125 From: Mohammadfaiz Bawa To: qemu-devel@nongnu.org Cc: stefanb@linux.vnet.ibm.com, pierrick.bouvier@linaro.org, "Michael S . Tsirkin" , imammedo@redhat.com, anisinha@redhat.com, peter.maydell@linaro.org, shannon.zhaosl@gmail.com, qemu-arm@nongnu.org, mohamed@unpredictable.fr, Mohammadfaiz Bawa , Stefan Berger Subject: [PATCH v2 1/3] docs/specs/tpm: document PPI support on ARM64 virt Date: Fri, 27 Mar 2026 17:18:22 +0530 Message-ID: <20260327-tpm-tis-sysbus-ppi-v2-1-d8ec84d25dbc@redhat.com> In-Reply-To: <20260327-tpm-tis-sysbus-ppi-v2-0-d8ec84d25dbc@redhat.com> References: <20260327-tpm-tis-sysbus-ppi-v2-0-d8ec84d25dbc@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=mbawa@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1774612170128154100 Document that tpm-tis-device on the ARM virt machine supports PPI with dynamically allocated MMIO via the platform bus, unlike x86 where PPI is at the fixed address 0xFED45000. Also add hw/arm/virt-acpi-build.c and hw/acpi/tpm.c to the list of files related to TPM ACPI tables. Reviewed-by: Stefan Berger Signed-off-by: Mohammadfaiz Bawa --- docs/specs/tpm.rst | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/docs/specs/tpm.rst b/docs/specs/tpm.rst index b630a351b4f77a8d2512f22446d00a4d674c7777..ba2b0d726745fdf8ebc4c73c9c4= 2e1ff8047a9db 100644 --- a/docs/specs/tpm.rst +++ b/docs/specs/tpm.rst @@ -187,8 +187,32 @@ The location of the table is given by the fw_cfg ``tpm= ppi_address`` field. The PPI memory region size is 0x400 (``TPM_PPI_ADDR_SIZE``) to leave enough room for future updates. =20 +PPI on ARM64 virt +----------------- + +The ARM virt machine supports PPI for ``tpm-tis-device`` as defined +in the `PPI specification`_. + +Unlike the x86 TIS device where the PPI memory region is mapped at +the fixed address ``0xFED45000`` (within the TIS MMIO range), the +ARM64 sysbus device registers PPI memory as a second MMIO region +on the platform bus. The platform bus assigns the guest physical +address dynamically at device plug time. The ACPI ``_DSM`` method +and PPI operation regions reference this dynamically resolved +address. + +PPI is controlled by the ``ppi`` property (default ``on``):: + + -device tpm-tis-device,tpmdev=3Dtpm0,ppi=3Don + +Without PPI, guest operating systems such as Windows 11 +ARM64 will log errors when attempting to query TPM Physical +Presence capabilities via the ACPI ``_DSM`` method. + QEMU files related to TPM ACPI tables: - ``hw/i386/acpi-build.c`` + - ``hw/arm/virt-acpi-build.c`` + - ``hw/acpi/tpm.c`` - ``include/hw/acpi/tpm.h`` =20 TPM backend devices --=20 2.53.0