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GET /api/patches/2226175/?format=api
{ "id": 2226175, "url": "http://patchwork.ozlabs.org/api/patches/2226175/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260422103018.123608-4-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": "<20260422103018.123608-4-armenon@redhat.com>", "list_archive_url": null, "date": "2026-04-22T10:30:11", "name": "[v5,03/10] hw/tpm: Add internal buffer state for chunking", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "31a279af35a297e3d4cab55ba78af68916d5243f", "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/20260422103018.123608-4-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/2226175/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226175/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=AmNTwlOO;\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=MLGbtikx;\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>", "Subject": "[PATCH v5 03/10] hw/tpm: Add internal buffer state for chunking", "Date": "Wed, 22 Apr 2026 16:00:11 +0530", "Message-ID": "<20260422103018.123608-4-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=170.10.133.124; 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, SPF_HELO_PASS=-0.001,\n 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- Introduce GByteArray buffers to hold the command request and response\n data during chunked TPM CRB transactions.\n- Add helper function to clean them.\n\nSigned-off-by: Arun Menon <armenon@redhat.com>\nReviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>\n---\n hw/tpm/tpm_crb.c | 33 +++++++++++++++++++++++++++++----\n 1 file changed, 29 insertions(+), 4 deletions(-)", "diff": "diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c\nindex 7edfbf8f8a..e7ec9d0679 100644\n--- a/hw/tpm/tpm_crb.c\n+++ b/hw/tpm/tpm_crb.c\n@@ -38,10 +38,13 @@ struct CRBState {\n TPMBackend *tpmbe;\n TPMBackendCmd cmd;\n uint32_t regs[TPM_CRB_R_MAX];\n+ size_t be_buffer_size;\n MemoryRegion mmio;\n MemoryRegion cmdmem;\n \n- size_t be_buffer_size;\n+ GByteArray *command_buffer;\n+ GByteArray *response_buffer;\n+ uint32_t response_offset;\n \n bool ppi_enabled;\n TPMPPI ppi;\n@@ -87,6 +90,13 @@ enum crb_cancel {\n \n #define TPM_CRB_NO_LOCALITY 0xff\n \n+static void tpm_crb_clear_internal_buffers(CRBState *s)\n+{\n+ g_byte_array_set_size(s->response_buffer, 0);\n+ g_byte_array_set_size(s->command_buffer, 0);\n+ s->response_offset = 0;\n+}\n+\n static uint64_t tpm_crb_mmio_read(void *opaque, hwaddr addr,\n unsigned size)\n {\n@@ -136,9 +146,11 @@ static void tpm_crb_mmio_write(void *opaque, hwaddr addr,\n }\n break;\n case A_CRB_CTRL_CANCEL:\n- if (val == CRB_CANCEL_INVOKE &&\n- s->regs[R_CRB_CTRL_START] & CRB_START_INVOKE) {\n- tpm_backend_cancel_cmd(s->tpmbe);\n+ if (val == CRB_CANCEL_INVOKE) {\n+ if (s->regs[R_CRB_CTRL_START] & CRB_START_INVOKE) {\n+ tpm_backend_cancel_cmd(s->tpmbe);\n+ }\n+ tpm_crb_clear_internal_buffers(s);\n }\n break;\n case A_CRB_CTRL_START:\n@@ -243,6 +255,7 @@ static void tpm_crb_reset(void *dev)\n tpm_ppi_reset(&s->ppi);\n }\n tpm_backend_reset(s->tpmbe);\n+ tpm_crb_clear_internal_buffers(s);\n \n memset(s->regs, 0, sizeof(s->regs));\n \n@@ -309,6 +322,9 @@ static void tpm_crb_realize(DeviceState *dev, Error **errp)\n memory_region_add_subregion(get_system_memory(),\n TPM_CRB_ADDR_BASE + sizeof(s->regs), &s->cmdmem);\n \n+ s->command_buffer = g_byte_array_new();\n+ s->response_buffer = g_byte_array_new();\n+\n if (s->ppi_enabled) {\n tpm_ppi_init(&s->ppi, get_system_memory(),\n TPM_PPI_ADDR_BASE, OBJECT(s));\n@@ -321,12 +337,21 @@ static void tpm_crb_realize(DeviceState *dev, Error **errp)\n }\n }\n \n+static void tpm_crb_unrealize(DeviceState *dev)\n+{\n+ CRBState *s = CRB(dev);\n+\n+ g_clear_pointer(&s->command_buffer, g_byte_array_unref);\n+ g_clear_pointer(&s->response_buffer, g_byte_array_unref);\n+}\n+\n static void tpm_crb_class_init(ObjectClass *klass, const void *data)\n {\n DeviceClass *dc = DEVICE_CLASS(klass);\n TPMIfClass *tc = TPM_IF_CLASS(klass);\n \n dc->realize = tpm_crb_realize;\n+ dc->unrealize = tpm_crb_unrealize;\n device_class_set_props(dc, tpm_crb_properties);\n dc->vmsd = &vmstate_tpm_crb;\n dc->user_creatable = true;\n", "prefixes": [ "v5", "03/10" ] }