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GET /api/1.1/patches/2230520/?format=api
{ "id": 2230520, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2230520/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429135717.3048713-11-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": "<20260429135717.3048713-11-joshualant@gmail.com>", "date": "2026-04-29T13:48:44", "name": "[RFC,QEMU,10/10] cxl-mailbox-utils: Add support for VCS Get Virtual CXL Switch Info command.", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "b3d3deba9fb4daedf6de52061c7105f5d461923c", "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/20260429135717.3048713-11-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/2230520/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2230520/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=S238nrui;\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-x436.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 16:03:16 -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": "Adds support for FMAPI command 0x5200, for more\ninformation see CXL Specification v3.2 (7.6.7.2.1).\n\nSigned-off-by: Joshua Lant <joshualant@gmail.com>\n---\n hw/cxl/cxl-mailbox-utils.c | 84 ++++++++++++++++++++++++++++++++++++++\n 1 file changed, 84 insertions(+)", "diff": "diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c\nindex cf6cb65eb6..825ef35179 100644\n--- a/hw/cxl/cxl-mailbox-utils.c\n+++ b/hw/cxl/cxl-mailbox-utils.c\n@@ -123,6 +123,7 @@ enum {\n #define GET_PHYSICAL_PORT_STATE 0x1\n #define PHYSICAL_PORT_CONTROL 0x2\n VIRTUAL_SWITCH = 0x52,\n+ #define GET_VIRTUAL_SWITCH_INFO 0x0\n #define BIND_VPPB 0x1\n #define UNBIND_VPPB 0x2\n TUNNEL = 0x53,\n@@ -825,6 +826,87 @@ static CXLRetCode cmd_physical_port_control(const struct cxl_cmd *cmd,\n }\n }\n \n+/* CXL r3.2 Section 7.6.7.2.1: Get Virtual CXL Switch Info (Opcode 5200h) */\n+static CXLRetCode cmd_get_virtual_switch_info(const struct cxl_cmd *cmd,\n+ uint8_t *payload_in,\n+ size_t len_in,\n+ uint8_t *payload_out,\n+ size_t *len_out,\n+ CXLCCI *cci)\n+{\n+ struct cxl_fmapi_get_virtual_switch_info_req_pl {\n+ uint8_t start_vppb;\n+ uint8_t vppb_list_limit;\n+ uint8_t number_of_vcs;\n+ uint8_t vcs_id_list[];\n+ } QEMU_PACKED *in = (void *)payload_in;\n+ struct vppb_info {\n+ uint8_t binding_status;\n+ uint8_t bound_port_id;\n+ uint8_t bound_ld_id;\n+ uint8_t rsv1;\n+ } QEMU_PACKED;\n+ struct vcs_info_block {\n+ uint8_t vcs_id;\n+ uint8_t vcs_state;\n+ uint8_t usp_id;\n+ uint8_t num_vppbs;\n+ struct vppb_info vppbs[];\n+ } QEMU_PACKED;\n+ struct cxl_fmapi_get_virtual_switch_info_rsp_pl {\n+ uint8_t num_vcs;\n+ uint8_t rsv1[3];\n+ struct vcs_info_block vcs_info_list[];\n+ } QEMU_PACKED *out = (void *)payload_out;\n+\n+ uint8_t num_vcs_ret = cci->vcs->num_usp_ppbs;\n+ uint8_t num_vppbs_ret;\n+ ssize_t len_out_tmp = *len_out;\n+ len_out_tmp = sizeof(struct cxl_fmapi_get_virtual_switch_info_rsp_pl) +\n+ (num_vcs_ret * sizeof(*out->vcs_info_list));\n+ for(int i = 0; i < num_vcs_ret; i++) {\n+ //num_vppbs_ret = get_num_vppbs_in_vcs(cci->d, i);\n+ num_vppbs_ret = cci->vcs->usp_ppbs[i]->info->num_vppbs;\n+ //vPPB List Entry Count=min(vPPB List Limit, Number of vPPBs).\n+ len_out_tmp = (num_vppbs_ret <= VPPB_LIST_LIMIT) ?\n+ len_out_tmp + (num_vppbs_ret * sizeof(struct vppb_info)) :\n+ len_out_tmp + (VPPB_LIST_LIMIT * sizeof(struct vppb_info));\n+ }\n+ *len_out = len_out_tmp;\n+\n+ out->num_vcs = num_vcs_ret;\n+ out->rsv1[0] = 0;\n+ out->rsv1[1] = 0;\n+ out->rsv1[2] = 0;\n+\n+ uint8_t *ptr = (uint8_t *)out->vcs_info_list;\n+\n+ for (int i = 0; i < num_vcs_ret; i++) {\n+ CXLVCSInfoBlock *info = cci->vcs->usp_ppbs[i]->info;\n+ uint8_t num_vppbs = info->num_vppbs;\n+ uint8_t vppb_count = MIN(num_vppbs - in->start_vppb,\n+ in->vppb_list_limit);\n+\n+ /* write fixed vcs_info_block header (4 bytes) */\n+ *ptr++ = info->vcs_id;\n+ *ptr++ = info->vcs_state;\n+ *ptr++ = info->usp_id;\n+ *ptr++ = num_vppbs;\n+\n+ /* write vppb entries for current vcs */\n+ for (int j = in->start_vppb; j < in->start_vppb + vppb_count; j++) {\n+ struct vppb_info *v = (struct vppb_info *)ptr;\n+ v->binding_status = info->vppbs[j]->binding_status;\n+ v->bound_port_id = info->vppbs[j]->bound_port_id;\n+ v->bound_ld_id = info->vppbs[j]->bound_ld_id;\n+ v->rsv1 = 0;\n+ ptr += sizeof(struct vppb_info);\n+ }\n+ }\n+\n+ return CXL_MBOX_SUCCESS;\n+}\n+\n /* CXL r3.2 Section 7.6.7.2.2: Bind vPPB (Opcode 5201h) */\n static CXLRetCode cmd_bind_vppb(const struct cxl_cmd *cmd,\n uint8_t *payload_in,\n@@ -4974,6 +5056,8 @@ static const struct cxl_cmd cxl_cmd_set_vcs_mctp[256][256] = {\n cmd_get_physical_port_state, ~0, 0 },\n [PHYSICAL_SWITCH][PHYSICAL_PORT_CONTROL] = { \"SWITCH_PHYSICAL_PORT_CONTROL\",\n cmd_physical_port_control, 2, 0 },\n+ [VIRTUAL_SWITCH][GET_VIRTUAL_SWITCH_INFO] = { \"GET_VIRTUAL_SWITCH_INFO\",\n+ cmd_get_virtual_switch_info, ~0, 0 },\n [VIRTUAL_SWITCH][BIND_VPPB] = { \"BIND_VPPB\",\n cmd_bind_vppb, ~0, 0 },\n [VIRTUAL_SWITCH][UNBIND_VPPB] = { \"UNBIND_VPPB\",\n", "prefixes": [ "RFC", "QEMU", "10/10" ] }