Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/2217139/?format=api
{ "id": 2217139, "url": "http://patchwork.ozlabs.org/api/patches/2217139/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260327173209.148180-2-mbawa@redhat.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260327173209.148180-2-mbawa@redhat.com>", "list_archive_url": null, "date": "2026-03-27T17:32:07", "name": "[v3,1/3] docs/specs/tpm: document PPI support on ARM64 virt", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "54d35a52fc83ff8b6e91751c82fd2c5171fbd6c4", "submitter": { "id": 92626, "url": "http://patchwork.ozlabs.org/api/people/92626/?format=api", "name": "Mohammadfaiz Bawa", "email": "mbawa@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260327173209.148180-2-mbawa@redhat.com/mbox/", "series": [ { "id": 497807, "url": "http://patchwork.ozlabs.org/api/series/497807/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=497807", "date": "2026-03-27T17:32:08", "name": "hw/tpm: add PPI support to tpm-tis-device on ARM64 virt", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/497807/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2217139/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2217139/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=Ifw+a4m/;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fj75p5BqJz1y1P\n\tfor <incoming@patchwork.ozlabs.org>; Sat, 28 Mar 2026 04:33:18 +1100 (AEDT)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1w6B35-0006YL-Fh; Fri, 27 Mar 2026 13:32:43 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mbawa@redhat.com>) id 1w6B33-0006Y1-1t\n for qemu-devel@nongnu.org; Fri, 27 Mar 2026 13:32:41 -0400", "from us-smtp-delivery-124.mimecast.com ([170.10.133.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <mbawa@redhat.com>) id 1w6B30-0007y7-1Y\n for qemu-devel@nongnu.org; Fri, 27 Mar 2026 13:32:40 -0400", "from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com\n (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by\n relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n cipher=TLS_AES_256_GCM_SHA384) id us-mta-136-U5MYos7pPhyL5CRyhdxYaA-1; Fri,\n 27 Mar 2026 13:32:33 -0400", "from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com\n (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS\n id A85EC180044D; Fri, 27 Mar 2026 17:32:28 +0000 (UTC)", "from mbawa-thinkpadt14gen5.bengluru.csb (unknown [10.74.88.2])\n by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP\n id 17DD730001A1; Fri, 27 Mar 2026 17:32:20 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1774632756;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=gn3jrtSyozbHerGqTPMze7M1HW6JN1Jbqrfe547XgwE=;\n b=Ifw+a4m/jAin3xWGiJFbRfQ192BJkDXrfoVo6FiuCf9TAg+S1jWsLqX4DmTLc0Hx8phFau\n VoutL/08GKHY6Thi/Hlm1QSfN4pmFd5Wb+lBmqOTO+RRWK4k4R2ksbh7Ungl0twtGihh6p\n WmkvUOuftYSdIFQZZ/JY816dyiw5R3k=", "X-MC-Unique": "U5MYos7pPhyL5CRyhdxYaA-1", "X-Mimecast-MFC-AGG-ID": "U5MYos7pPhyL5CRyhdxYaA_1774632749", "From": "Mohammadfaiz Bawa <mbawa@redhat.com>", "To": "qemu-devel@nongnu.org", "Cc": "stefanb@linux.vnet.ibm.com, pierrick.bouvier@linaro.org,\n \"Michael S . Tsirkin\" <mst@redhat.com>, imammedo@redhat.com,\n anisinha@redhat.com, peter.maydell@linaro.org, shannon.zhaosl@gmail.com,\n qemu-arm@nongnu.org, mohamed@unpredictable.fr, philmd@linaro.org,\n Mohammadfaiz Bawa <mbawa@redhat.com>, Stefan Berger <stefanb@linux.ibm.com>", "Subject": "[PATCH v3 1/3] docs/specs/tpm: document PPI support on ARM64 virt", "Date": "Fri, 27 Mar 2026 23:02:07 +0530", "Message-ID": "<20260327173209.148180-2-mbawa@redhat.com>", "In-Reply-To": "<20260327173209.148180-1-mbawa@redhat.com>", "References": "<20260327173209.148180-1-mbawa@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.4", "Received-SPF": "pass client-ip=170.10.133.124; envelope-from=mbawa@redhat.com;\n 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,\n DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=0.001,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_PASS=-0.001,\n 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 <qemu-devel.nongnu.org>", "List-Unsubscribe": "<https://lists.nongnu.org/mailman/options/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>", "List-Archive": "<https://lists.nongnu.org/archive/html/qemu-devel>", "List-Post": "<mailto:qemu-devel@nongnu.org>", "List-Help": "<mailto:qemu-devel-request@nongnu.org?subject=help>", "List-Subscribe": "<https://lists.nongnu.org/mailman/listinfo/qemu-devel>,\n <mailto:qemu-devel-request@nongnu.org?subject=subscribe>", "Errors-To": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org", "Sender": "qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org" }, "content": "Document that tpm-tis-device on the ARM virt machine supports PPI\nwith dynamically allocated MMIO via the platform bus, unlike x86\nwhere PPI is at the fixed address 0xFED45000.\n\nAlso add hw/arm/virt-acpi-build.c and hw/acpi/tpm.c to the list\nof files related to TPM ACPI tables.\n\nReviewed-by: Stefan Berger <stefanb@linux.ibm.com>\nSigned-off-by: Mohammadfaiz Bawa <mbawa@redhat.com>\n---\n docs/specs/tpm.rst | 24 ++++++++++++++++++++++++\n 1 file changed, 24 insertions(+)", "diff": "diff --git a/docs/specs/tpm.rst b/docs/specs/tpm.rst\nindex b630a351b4..ba2b0d7267 100644\n--- a/docs/specs/tpm.rst\n+++ b/docs/specs/tpm.rst\n@@ -187,8 +187,32 @@ The location of the table is given by the fw_cfg ``tpmppi_address``\n field. The PPI memory region size is 0x400 (``TPM_PPI_ADDR_SIZE``) to\n leave enough room for future updates.\n \n+PPI on ARM64 virt\n+-----------------\n+\n+The ARM virt machine supports PPI for ``tpm-tis-device`` as defined\n+in the `PPI specification`_.\n+\n+Unlike the x86 TIS device where the PPI memory region is mapped at\n+the fixed address ``0xFED45000`` (within the TIS MMIO range), the\n+ARM64 sysbus device registers PPI memory as a second MMIO region\n+on the platform bus. The platform bus assigns the guest physical\n+address dynamically at device plug time. The ACPI ``_DSM`` method\n+and PPI operation regions reference this dynamically resolved\n+address.\n+\n+PPI is controlled by the ``ppi`` property (default ``on``)::\n+\n+ -device tpm-tis-device,tpmdev=tpm0,ppi=on\n+\n+Without PPI, guest operating systems such as Windows 11\n+ARM64 will log errors when attempting to query TPM Physical\n+Presence capabilities via the ACPI ``_DSM`` method.\n+\n QEMU files related to TPM ACPI tables:\n - ``hw/i386/acpi-build.c``\n+ - ``hw/arm/virt-acpi-build.c``\n+ - ``hw/acpi/tpm.c``\n - ``include/hw/acpi/tpm.h``\n \n TPM backend devices\n", "prefixes": [ "v3", "1/3" ] }