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GET /api/patches/2226174/?format=api
{ "id": 2226174, "url": "http://patchwork.ozlabs.org/api/patches/2226174/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260422103018.123608-2-armenon@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": "<20260422103018.123608-2-armenon@redhat.com>", "list_archive_url": null, "date": "2026-04-22T10:30:09", "name": "[v5,01/10] hw/tpm: Add TPM CRB chunking fields", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9caef1fe6bc81eccb5107f6afb9be7810c5d3034", "submitter": { "id": 91136, "url": "http://patchwork.ozlabs.org/api/people/91136/?format=api", "name": "Arun Menon", "email": "armenon@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260422103018.123608-2-armenon@redhat.com/mbox/", "series": [ { "id": 500964, "url": "http://patchwork.ozlabs.org/api/series/500964/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500964", "date": "2026-04-22T10:30:14", "name": "hw/tpm: CRB chunking capability to handle PQC", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/500964/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226174/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226174/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=THHlDPGw;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=HlJsAUvx;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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Tsirkin\" <mst@redhat.com>, Yanan Wang <wangyanan55@huawei.com>,\n Ani Sinha <anisinha@redhat.com>, Arun Menon <armenon@redhat.com>,\n Stefan Berger <stefanb@linux.ibm.com>", "Subject": "[PATCH v5 01/10] hw/tpm: Add TPM CRB chunking fields", "Date": "Wed, 22 Apr 2026 16:00:09 +0530", "Message-ID": "<20260422103018.123608-2-armenon@redhat.com>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260422103018.123608-1-armenon@redhat.com>", "References": "<20260422103018.123608-1-armenon@redhat.com>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "Received-SPF": "pass client-ip=170.10.129.124; envelope-from=armenon@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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham 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": "From: Arun Menon <armenon@redhat.com>\n\n- Add new fields to the CRB Interface Identifier and the CRB\n Control Start registers.\n- CRB_CTRL_START now has 2 new settings, that can be toggled using the\n nextChunk and crbRspRetry bits.\n- CapCRBChunk bit (10) was Reserved1 previously. The field is reused in\n this revision of the specification. Refer to section 6.4.2.2 of [1]\n- Add hw_compat global property called cap-chunk because the chunking\n feature is only supported for machine type 11.1 and higher.\n\n[1] https://trustedcomputinggroup.org/wp-content/uploads/PC-Client-Specific-Platform-TPM-Profile-for-TPM-2p0-v1p07_Pub.pdf\n\nSigned-off-by: Arun Menon <armenon@redhat.com>\nReviewed-by: Stefan Berger <stefanb@linux.ibm.com>\nReviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>\n---\n hw/core/machine.c | 4 +++-\n hw/tpm/tpm_crb.c | 6 ++++++\n include/hw/acpi/tpm.h | 5 ++++-\n 3 files changed, 13 insertions(+), 2 deletions(-)", "diff": "diff --git a/hw/core/machine.c b/hw/core/machine.c\nindex 1abc8ae737..6d27cf69a2 100644\n--- a/hw/core/machine.c\n+++ b/hw/core/machine.c\n@@ -38,7 +38,9 @@\n #include \"hw/acpi/generic_event_device.h\"\n #include \"qemu/audio.h\"\n \n-GlobalProperty hw_compat_11_0[] = {};\n+GlobalProperty hw_compat_11_0[] = {\n+ { \"tpm-crb\", \"cap-chunk\", \"off\"},\n+};\n const size_t hw_compat_11_0_len = G_N_ELEMENTS(hw_compat_11_0);\n \n GlobalProperty hw_compat_10_2[] = {\ndiff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c\nindex 8723536f93..9555b2c62d 100644\n--- a/hw/tpm/tpm_crb.c\n+++ b/hw/tpm/tpm_crb.c\n@@ -45,6 +45,8 @@ struct CRBState {\n \n bool ppi_enabled;\n TPMPPI ppi;\n+\n+ bool cap_chunk;\n };\n typedef struct CRBState CRBState;\n \n@@ -59,6 +61,7 @@ DECLARE_INSTANCE_CHECKER(CRBState, CRB,\n #define CRB_INTF_CAP_FIFO_NOT_SUPPORTED 0b0\n #define CRB_INTF_CAP_CRB_SUPPORTED 0b1\n #define CRB_INTF_IF_SELECTOR_CRB 0b1\n+#define CRB_INTF_CAP_CRB_CHUNK 0b1\n \n #define CRB_CTRL_CMD_SIZE (TPM_CRB_ADDR_SIZE - A_CRB_DATA_BUFFER)\n \n@@ -229,6 +232,7 @@ static const VMStateDescription vmstate_tpm_crb = {\n static const Property tpm_crb_properties[] = {\n DEFINE_PROP_TPMBE(\"tpmdev\", CRBState, tpmbe),\n DEFINE_PROP_BOOL(\"ppi\", CRBState, ppi_enabled, true),\n+ DEFINE_PROP_BOOL(\"cap-chunk\", CRBState, cap_chunk, true),\n };\n \n static void tpm_crb_reset(void *dev)\n@@ -262,6 +266,8 @@ static void tpm_crb_reset(void *dev)\n CapCRB, CRB_INTF_CAP_CRB_SUPPORTED);\n ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n InterfaceSelector, CRB_INTF_IF_SELECTOR_CRB);\n+ ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n+ CapCRBChunk, s->cap_chunk ? CRB_INTF_CAP_CRB_CHUNK : 0);\n ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID,\n RID, 0b0000);\n ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID2,\ndiff --git a/include/hw/acpi/tpm.h b/include/hw/acpi/tpm.h\nindex d2bf6637c5..6eece21397 100644\n--- a/include/hw/acpi/tpm.h\n+++ b/include/hw/acpi/tpm.h\n@@ -149,7 +149,7 @@ REG32(CRB_INTF_ID, 0x30)\n FIELD(CRB_INTF_ID, InterfaceVersion, 4, 4)\n FIELD(CRB_INTF_ID, CapLocality, 8, 1)\n FIELD(CRB_INTF_ID, CapCRBIdleBypass, 9, 1)\n- FIELD(CRB_INTF_ID, Reserved1, 10, 1)\n+ FIELD(CRB_INTF_ID, CapCRBChunk, 10, 1)\n FIELD(CRB_INTF_ID, CapDataXferSizeSupport, 11, 2)\n FIELD(CRB_INTF_ID, CapFIFO, 13, 1)\n FIELD(CRB_INTF_ID, CapCRB, 14, 1)\n@@ -168,6 +168,9 @@ REG32(CRB_CTRL_STS, 0x44)\n FIELD(CRB_CTRL_STS, tpmIdle, 1, 1)\n REG32(CRB_CTRL_CANCEL, 0x48)\n REG32(CRB_CTRL_START, 0x4C)\n+ FIELD(CRB_CTRL_START, Start, 0, 1)\n+ FIELD(CRB_CTRL_START, crbRspRetry, 1, 1)\n+ FIELD(CRB_CTRL_START, nextChunk, 2, 1)\n REG32(CRB_INT_ENABLED, 0x50)\n REG32(CRB_INT_STS, 0x54)\n REG32(CRB_CTRL_CMD_SIZE, 0x58)\n", "prefixes": [ "v5", "01/10" ] }