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GET /api/1.1/patches/2230515/?format=api
{ "id": 2230515, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230515/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429135717.3048713-7-joshualant@gmail.com/", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.1/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": "" }, "msgid": "<20260429135717.3048713-7-joshualant@gmail.com>", "date": "2026-04-29T13:48:40", "name": "[RFC,QEMU,06/10] cxl-upstream-port: Add support for targeting a VCS switch", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "cd91c98054df2cf0e0f0083b93e0b2f84afb488d", "submitter": { "id": 93283, "url": "http://patchwork.ozlabs.org/api/1.1/people/93283/?format=api", "name": "Joshua Lant", "email": "joshualant@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429135717.3048713-7-joshualant@gmail.com/mbox/", "series": [ { "id": 502144, "url": "http://patchwork.ozlabs.org/api/1.1/series/502144/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502144", "date": "2026-04-29T13:48:40", "name": "Initial Support for VCS Switching", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/502144/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2230515/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230515/checks/", "tags": {}, "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 (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=gbj3zRB4;\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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helo=mail-wr1-x433.google.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, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001,\n RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no", "X-Spam_action": "no action", "X-Mailman-Approved-At": "Wed, 29 Apr 2026 16:03:14 -0400", "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": "Allows an upstream port to be registered on the CLI as a VCS within a\ncxl-vcs-switch. A VCS is defined as an upstream pci-pci bridge, and a set of\ndownstream virtual pci-pci bridges VPPBs, which form a single Virtual\nHierarchy within the switch.\n\nSigned-off-by: Joshua Lant <joshualant@gmail.com>\n---\n hw/pci-bridge/cxl_upstream.c | 20 ++++++++++++++++++++\n include/hw/pci-bridge/cxl_upstream_port.h | 2 ++\n 2 files changed, 22 insertions(+)", "diff": "diff --git a/hw/pci-bridge/cxl_upstream.c b/hw/pci-bridge/cxl_upstream.c\nindex 3fcfc2cde6..a91f721c9e 100644\n--- a/hw/pci-bridge/cxl_upstream.c\n+++ b/hw/pci-bridge/cxl_upstream.c\n@@ -16,6 +16,8 @@\n #include \"hw/pci/pcie.h\"\n #include \"hw/pci/pcie_port.h\"\n #include \"hw/pci-bridge/cxl_upstream_port.h\"\n+#include \"hw/cxl/cxl_vcs_switch.h\"\n+\n /*\n * Null value of all Fs suggested by IEEE RA guidelines for use of\n * EU, OUI and CID\n@@ -346,6 +348,22 @@ static void cxl_usp_realize(PCIDevice *d, Error **errp)\n goto err_cap;\n }\n \n+ if (usp->vcs_name && usp->ppb != UINT8_MAX) {\n+ Object *obj = object_resolve_path_component(\n+ object_get_objects_root(), usp->vcs_name);\n+ if (!obj) {\n+ error_setg(errp, \"vcs '%s' not found\", usp->vcs_name);\n+ goto err_cap;\n+ }\n+ if (!object_dynamic_cast(obj, TYPE_CXL_VCS_SWITCH)) {\n+ error_setg(errp, \"'%s' is not a cxl-vcs-switch\", usp->vcs_name);\n+ goto err_cap;\n+ }\n+ cxl_vcs_register_usp(CXL_VCS_SWITCH(obj), usp, errp);\n+ if (*errp) \n+ goto err_cap;\n+ }\n+\n return;\n \n err_cap:\n@@ -372,6 +390,8 @@ static const Property cxl_upstream_props[] = {\n DEFINE_PROP_PCIE_LINK_WIDTH(\"x-width\", CXLUpstreamPort,\n width, PCIE_LINK_WIDTH_16),\n DEFINE_PROP_BOOL(\"x-256b-flit\", CXLUpstreamPort, flitmode, false),\n+ DEFINE_PROP_STRING(\"vcs\", CXLUpstreamPort, vcs_name),\n+ DEFINE_PROP_UINT8(\"usppb\", CXLUpstreamPort, ppb, UINT8_MAX),\n };\n \n static void cxl_upstream_class_init(ObjectClass *oc, const void *data)\ndiff --git a/include/hw/pci-bridge/cxl_upstream_port.h b/include/hw/pci-bridge/cxl_upstream_port.h\nindex ce248f3dca..05632286db 100644\n--- a/include/hw/pci-bridge/cxl_upstream_port.h\n+++ b/include/hw/pci-bridge/cxl_upstream_port.h\n@@ -22,6 +22,8 @@ typedef struct CXLUpstreamPort {\n \n DOECap doe_cdat;\n uint64_t sn;\n+ char *vcs_name;\n+ uint8_t ppb;\n } CXLUpstreamPort;\n \n #endif /* CXL_SUP_H */\n", "prefixes": [ "RFC", "QEMU", "06/10" ] }