[{"id":3668984,"web_url":"http://patchwork.ozlabs.org/comment/3668984/","msgid":"","list_archive_url":null,"date":"2026-03-25T10:54:57","subject":"Re: [PATCH] hw/i2c/aspeed_i2c: reset and migrate pending_intr_sts","submitter":{"id":68548,"url":"http://patchwork.ozlabs.org/api/people/68548/","name":"Cédric Le Goater","email":"clg@kaod.org"},"content":"+Jithu\n\nOn 3/25/26 09:54, GuoHan Zhao wrote:\n> Commit 7e82393ed058 (\"hw/i2c/aspeed: fix lost interrupts on\n> back-to-back commands\") introduced pending_intr_sts to preserve\n> interrupt bits that collide with already pending status bits.\n> \n> That deferred interrupt state is consumed later when the guest clears\n> INTR_STS, but it is not reset in aspeed_i2c_bus_reset() and it is not\n> part of the bus migration state. A reset can therefore leave stale\n> deferred bits behind, and migration can silently drop them.\n> \n> Clear pending_intr_sts on reset and include it in VMState while keeping\n> compatibility with older migration streams.\n> \n> Fixes: 7e82393ed058 (\"hw/i2c/aspeed: fix lost interrupts on back-to-back commands\")\n> Signed-off-by: GuoHan Zhao \n\n\nReviewed-by: Cédric Le Goater \n\nThanks,\n\nC.\n\n\n> ---\n> hw/i2c/aspeed_i2c.c | 4 +++-\n> 1 file changed, 3 insertions(+), 1 deletion(-)\n> \n> diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c\n> index 5d18f8d49ea4..90f83a03fd4f 100644\n> --- a/hw/i2c/aspeed_i2c.c\n> +++ b/hw/i2c/aspeed_i2c.c\n> @@ -1134,10 +1134,11 @@ static const MemoryRegionOps aspeed_i2c_bus_pool_ops = {\n> \n> static const VMStateDescription aspeed_i2c_bus_vmstate = {\n> .name = TYPE_ASPEED_I2C,\n> - .version_id = 6,\n> + .version_id = 7,\n> .minimum_version_id = 6,\n> .fields = (const VMStateField[]) {\n> VMSTATE_UINT32_ARRAY(regs, AspeedI2CBus, ASPEED_I2C_NEW_NUM_REG),\n> + VMSTATE_UINT32_V(pending_intr_sts, AspeedI2CBus, 7),\n> VMSTATE_UINT8_ARRAY(pool, AspeedI2CBus, ASPEED_I2C_BUS_POOL_SIZE),\n> VMSTATE_UINT64(dma_dram_offset, AspeedI2CBus),\n> VMSTATE_END_OF_LIST()\n> @@ -1510,6 +1511,7 @@ static void aspeed_i2c_bus_reset(DeviceState *dev)\n> AspeedI2CBus *s = ASPEED_I2C_BUS(dev);\n> \n> memset(s->regs, 0, sizeof(s->regs));\n> + s->pending_intr_sts = 0;\n> i2c_end_transfer(s->bus);\n> }\n>","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=kaod.org header.i=@kaod.org header.a=rsa-sha256\n header.s=ovhmo393970-selector1 header.b=d+2GWjNF;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)","garm.ovh; auth=pass\n (GARM-105G006b58b77fd-c109-4057-a78f-e0603fae2a86,\n 796938FF8373C45809F81B5903BEE6B4DB9E2182) smtp.auth=clg@kaod.org"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fgkN73PVbz1xy3\n\tfor ; Wed, 25 Mar 2026 21:55:51 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1w5LtT-0005rI-Tn; Wed, 25 Mar 2026 06:55:23 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w5LtN-0005qm-KB; Wed, 25 Mar 2026 06:55:17 -0400","from smtpout9.mo534.mail-out.ovh.net ([178.33.251.187])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w5LtK-00009x-SV; Wed, 25 Mar 2026 06:55:17 -0400","from director4.derp.mail-out.ovh.net\n (director4.derp.mail-out.ovh.net [79.137.60.37])\n by mo534.mail-out.ovh.net (Postfix) with ESMTPS id 4fgkM84735z60Ks;\n Wed, 25 Mar 2026 10:55:00 +0000 (UTC)","from director4.derp.mail-out.ovh.net\n (director4.derp.mail-out.ovh.net. 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A reset can therefore leave stale\n> deferred bits behind, and migration can silently drop them.\n\nThanks for identifying and fixing the aforementioned omissions\n\n> \n> Clear pending_intr_sts on reset and include it in VMState while keeping\n> compatibility with older migration streams.\n> \n> Fixes: 7e82393ed058 (\"hw/i2c/aspeed: fix lost interrupts on back-to-back commands\")\n> Signed-off-by: GuoHan Zhao \n\n\nReviewed-by: Jithu Joseph \n\n\n\n\n\nThanks\nJithu","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=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=cAjg7otc;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=a90Lg6FT;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fhfHb1gZCz1yFp\n\tfor ; Fri, 27 Mar 2026 09:55:07 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1w5tb1-0000bw-8S; Thu, 26 Mar 2026 18:54:35 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w5taw-0000bA-Qn\n for qemu-devel@nongnu.org; Thu, 26 Mar 2026 18:54:32 -0400","from mx0b-0031df01.pphosted.com ([205.220.180.131])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w5tau-0000W7-6E\n for qemu-devel@nongnu.org; Thu, 26 Mar 2026 18:54:29 -0400","from pps.filterd (m0279870.ppops.net [127.0.0.1])\n by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n 62QI58OO1476152\n for ; Thu, 26 Mar 2026 22:54:24 GMT","from mail-dy1-f197.google.com (mail-dy1-f197.google.com\n [74.125.82.197])\n by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4d59s40t1e-1\n (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT)\n for ; Thu, 26 Mar 2026 22:54:23 +0000 (GMT)","by mail-dy1-f197.google.com with SMTP id\n 5a478bee46e88-2c0ba59a830so1602386eec.0\n for ; Thu, 26 Mar 2026 15:54:23 -0700 (PDT)","from [10.110.108.41] (i-global254.qualcomm.com. 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Will be mindful of these next-time\n\n\nThanks\nJithu","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=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=lGa6JG1P;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=PYWWn92s;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fhfLn25rbz1yFp\n\tfor ; Fri, 27 Mar 2026 09:57:51 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1w5tdn-0001ki-M0; Thu, 26 Mar 2026 18:57:27 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w5tdm-0001kK-DL\n for qemu-devel@nongnu.org; Thu, 26 Mar 2026 18:57:26 -0400","from mx0b-0031df01.pphosted.com ([205.220.180.131])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from )\n id 1w5tdk-0001He-3F\n for qemu-devel@nongnu.org; Thu, 26 Mar 2026 18:57:26 -0400","from pps.filterd (m0279871.ppops.net [127.0.0.1])\n by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id\n 62QF9f7E3898185\n for ; Thu, 26 Mar 2026 22:57:23 GMT","from mail-dy1-f197.google.com (mail-dy1-f197.google.com\n [74.125.82.197])\n by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4d50kgb279-1\n (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT)\n for ; Thu, 26 Mar 2026 22:57:22 +0000 (GMT)","by mail-dy1-f197.google.com with SMTP id\n 5a478bee46e88-2c1030ca85eso1048841eec.0\n for ; Thu, 26 Mar 2026 15:57:22 -0700 (PDT)","from [10.110.108.41] (i-global254.qualcomm.com. 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helo=mx0b-0031df01.pphosted.com","X-Spam_score_int":"-27","X-Spam_score":"-2.8","X-Spam_bar":"--","X-Spam_report":"(-2.8 / 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_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001,\n RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001,\n 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"}},{"id":3670119,"web_url":"http://patchwork.ozlabs.org/comment/3670119/","msgid":"<5a9a3f1f-6811-4f1c-954a-f5aeff64fb8f@kaod.org>","list_archive_url":null,"date":"2026-03-27T07:34:48","subject":"Re: [PATCH] hw/i2c/aspeed_i2c: reset and migrate pending_intr_sts","submitter":{"id":68548,"url":"http://patchwork.ozlabs.org/api/people/68548/","name":"Cédric Le Goater","email":"clg@kaod.org"},"content":"On 3/26/26 23:57, Jithu Joseph wrote:\n> On 3/25/2026 3:54 AM, Cédric Le Goater wrote:\n>> +Jithu\n>>\n> \n> Thanks for looping me in Cédric. Will be mindful of these next-time\n\nMigration support of the Aspeed machines used to work. Maintaining\ncompatibility with older QEMU versions is best effort since it is\nnot a critical feature. But, who knows, may be, we will virtualise\nthe BMCs one day.\n\nThanks,\n\nC.","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=kaod.org header.i=@kaod.org header.a=rsa-sha256\n header.s=ovhmo393970-selector1 header.b=Uw0mH41Y;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)","garm.ovh; auth=pass\n (GARM-107S0016f9a3581-68b5-4bb5-a196-ab15fb86ad8c,\n 4AD7B9C179601A6B587B1B6029592EA05C058FDA) smtp.auth=clg@kaod.org"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fhsr84Qzfz1xy1\n\tfor ; Fri, 27 Mar 2026 18:35:36 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1w61ii-0006xm-Bk; Fri, 27 Mar 2026 03:35:04 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from ) id 1w61ig-0006xM-3N\n for qemu-devel@nongnu.org; Fri, 27 Mar 2026 03:35:02 -0400","from smtpout8.mo534.mail-out.ovh.net ([54.36.140.179])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from ) id 1w61id-0005wy-DB\n for qemu-devel@nongnu.org; Fri, 27 Mar 2026 03:35:01 -0400","from director3.derp.mail-out.ovh.net\n (director3.derp.mail-out.ovh.net [152.228.215.222])\n by mo534.mail-out.ovh.net (Postfix) with ESMTPS id 4fhsqJ2Vknz68mn;\n Fri, 27 Mar 2026 07:34:51 +0000 (UTC)","from director3.derp.mail-out.ovh.net\n (director3.derp.mail-out.ovh.net. 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A reset can therefore leave stale\n> deferred bits behind, and migration can silently drop them.\n> \n> Clear pending_intr_sts on reset and include it in VMState while keeping\n> compatibility with older migration streams.\n> \n> Fixes: 7e82393ed058 (\"hw/i2c/aspeed: fix lost interrupts on back-to-back commands\")\n> Signed-off-by: GuoHan Zhao \n> ---\n> hw/i2c/aspeed_i2c.c | 4 +++-\n> 1 file changed, 3 insertions(+), 1 deletion(-)\n> \n> diff --git a/hw/i2c/aspeed_i2c.c b/hw/i2c/aspeed_i2c.c\n> index 5d18f8d49ea4..90f83a03fd4f 100644\n> --- a/hw/i2c/aspeed_i2c.c\n> +++ b/hw/i2c/aspeed_i2c.c\n> @@ -1134,10 +1134,11 @@ static const MemoryRegionOps aspeed_i2c_bus_pool_ops = {\n> \n> static const VMStateDescription aspeed_i2c_bus_vmstate = {\n> .name = TYPE_ASPEED_I2C,\n> - .version_id = 6,\n> + .version_id = 7,\n> .minimum_version_id = 6,\n> .fields = (const VMStateField[]) {\n> VMSTATE_UINT32_ARRAY(regs, AspeedI2CBus, ASPEED_I2C_NEW_NUM_REG),\n> + VMSTATE_UINT32_V(pending_intr_sts, AspeedI2CBus, 7),\n> VMSTATE_UINT8_ARRAY(pool, AspeedI2CBus, ASPEED_I2C_BUS_POOL_SIZE),\n> VMSTATE_UINT64(dma_dram_offset, AspeedI2CBus),\n> VMSTATE_END_OF_LIST()\n> @@ -1510,6 +1511,7 @@ static void aspeed_i2c_bus_reset(DeviceState *dev)\n> AspeedI2CBus *s = ASPEED_I2C_BUS(dev);\n> \n> memset(s->regs, 0, sizeof(s->regs));\n> + s->pending_intr_sts = 0;\n> i2c_end_transfer(s->bus);\n> }\n> \n\nApplied to aspeed-next.\n\nThanks,\n\nC.","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=kaod.org header.i=@kaod.org header.a=rsa-sha256\n header.s=ovhmo393970-selector1 header.b=I5DOddVY;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; helo=lists.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)","garm.ovh; auth=pass\n (GARM-97G00230b7952a-f3f7-4917-8935-328f9af28683,\n 7D556D2DDFF67F75045F04EBDED03CA4E39E484C) smtp.auth=clg@kaod.org"],"Received":["from lists.gnu.org (lists.gnu.org [209.51.188.17])\n\t(using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits))\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4fkgBd1kGxz1yGH\n\tfor ; Mon, 30 Mar 2026 16:42:47 +1100 (AEDT)","from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from )\n\tid 1w75O5-0006EC-HY; Mon, 30 Mar 2026 01:42:09 -0400","from eggs.gnu.org ([2001:470:142:3::10])\n by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from ) id 1w75O1-0006Ds-VB\n for qemu-devel@nongnu.org; Mon, 30 Mar 2026 01:42:07 -0400","from smtpout1.mo533.mail-out.ovh.net ([51.210.94.138])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from ) id 1w75Nx-0000St-SX\n for qemu-devel@nongnu.org; Mon, 30 Mar 2026 01:42:05 -0400","from director3.derp.mail-out.ovh.net\n (director3.derp.mail-out.ovh.net [152.228.215.222])\n by mo533.mail-out.ovh.net (Postfix) with ESMTPS id 4fkg9d68vRz5w1w;\n Mon, 30 Mar 2026 05:41:57 +0000 (UTC)","from director3.derp.mail-out.ovh.net\n (director3.derp.mail-out.ovh.net. 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