{"id":2221128,"url":"http://patchwork.ozlabs.org/api/1.1/covers/2221128/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20260408085941.3837334-1-zhangjian.3032@bytedance.com/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","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":"<20260408085941.3837334-1-zhangjian.3032@bytedance.com>","date":"2026-04-08T08:59:39","name":"[v1,0/2] hw: introduce a lightweight MCTP-over-I2C responder","submitter":{"id":83966,"url":"http://patchwork.ozlabs.org/api/1.1/people/83966/?format=json","name":"Jian Zhang","email":"zhangjian.3032@bytedance.com"},"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/cover/20260408085941.3837334-1-zhangjian.3032@bytedance.com/mbox/","series":[{"id":499193,"url":"http://patchwork.ozlabs.org/api/1.1/series/499193/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=499193","date":"2026-04-08T08:59:40","name":"hw: introduce a lightweight MCTP-over-I2C responder","version":1,"mbox":"http://patchwork.ozlabs.org/series/499193/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/covers/2221128/comments/","headers":{"Return-Path":"","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=bytedance.com header.i=@bytedance.com\n header.a=rsa-sha256 header.s=2212171451 header.b=gMGKB+v0;\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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Wed, 08 Apr 2026 05:00:19 -0400"],"DKIM-Signature":"v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed;\n s=2212171451; d=bytedance.com; t=1775638799; h=from:subject:\n mime-version:from:date:message-id:subject:to:cc:reply-to:content-type:\n mime-version:in-reply-to:message-id;\n bh=g+AMW+AIqcrmYYHnTNq7KzVlFfTEGsoPYwILFkuet58=;\n b=gMGKB+v01Vw6KhsFVjgeDhRZ5F+hfB4Uh48SapBq6Ba0VuSWY5NE733Zs0+Sc8jHulkjnC\n 4JUQ6CEcWKvzTpIp6HA20290Ng2Rt/5w/Uy95x8l3CTMskdnUFRJGb23zAzL2BR/8WU8Tg\n rN4Lp45Su6ikx2s0OJhR0cBBQKiqOLIWyqB2fPJPOQq7IX0IeGUZN6VCaVZaU5QhMQxd3U\n OPQ3VWkoaY1Efk+chfdhISn7ikBUGudohT8GwotCmYQj1zultH+BeM8A2K00u0yMC/1NQV\n RCJ3CPrskerg3mTo0tevJi8/IKZeEOGB3qq188yT0+h5p8huWi8ZKGYPa/re4g==","Date":"Wed, 8 Apr 2026 16:59:39 +0800","Content-Type":"text/plain; charset=UTF-8","To":"=?utf-8?q?C=C3=A9dric_Le_Goater?= ,\n \"Peter Maydell\" ,\n \"Steven Lee\" , \"Troy Lee\" ,\n \"Jamin Lin\" ,\n \"Andrew Jeffery\" ,\n \"Joel Stanley\" , \"Paolo Bonzini\" ,\n , ,\n \"Jeremy Kerr\" ,\n \"Matt Johnston\" ","X-Mailer":"git-send-email 2.20.1","X-Lms-Return-Path":"\n ","From":"\"Jian Zhang\" ","Subject":"[PATCH v1 0/2] hw: introduce a lightweight MCTP-over-I2C responder","Message-Id":"<20260408085941.3837334-1-zhangjian.3032@bytedance.com>","Mime-Version":"1.0","X-Original-From":"Jian Zhang ","Content-Transfer-Encoding":"7bit","Received-SPF":"pass client-ip=209.127.231.114;\n envelope-from=zhangjian.3032@bytedance.com; helo=va-2-114.ptr.blmpb.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,\n RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001,\n SPF_HELO_NONE=0.001, 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 ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Hi,\n\nMCTP (Management Component Transport Protocol) is a DMTF-defined\nmanagement transport protocol commonly used between BMCs and managed\ncomponents.\n\nThis series adds a lightweight MCTP implementation to QEMU. To keep the\nscope small and make the first step easier to review, the current series\nfocuses only on the SMBus/I2C transport layer.\n\nPatch 1 introduces a minimal MCTP-over-I2C responder core together with\na simple NCSI-related extension built on top of it. Patch 2 wires the\ndevice into the ASPEED AST2600 EVB machine for initial testing.\n\nThe goal of this series is not to implement a full MCTP stack, but to\nprovide a small and practical foundation for simple emulation use cases.\n\nThis is my first submission to the QEMU upstream community, so any\ncomments, suggestions, or corrections would be valuable.\n\nmctp spec[0]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0236_1.3.1.pdf\nmctp i2c binding[1]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0237_1.2.0.pdf\nncsi spec[2]: https://www.dmtf.org/sites/default/files/standards/documents/DSP0222_1.2.0.pdf\n\nJian Zhang (2):\n hw/misc: introduce mctp I2C responder and NCSI support\n hw/arm/aspeed: add mctp responder device for test\n\n MAINTAINERS | 2 +\n hw/arm/aspeed_ast2600_evb.c | 14 +\n hw/misc/Kconfig | 5 +\n hw/misc/mctp-i2c-responder-ncsi.c | 777 +++++++++++++++++++++++++++\n hw/misc/mctp-i2c-responder.c | 694 ++++++++++++++++++++++++\n hw/misc/meson.build | 5 +\n include/hw/misc/mctp-i2c-responder.h | 116 ++++\n 7 files changed, 1613 insertions(+)\n create mode 100644 hw/misc/mctp-i2c-responder-ncsi.c\n create mode 100644 hw/misc/mctp-i2c-responder.c\n create mode 100644 include/hw/misc/mctp-i2c-responder.h"}