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GET /api/1.1/patches/2225170/?format=api
{ "id": 2225170, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2225170/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420140552.104369-3-eric.auger@redhat.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": "<20260420140552.104369-3-eric.auger@redhat.com>", "date": "2026-04-20T14:03:52", "name": "[v10,2/7] target/arm/machine: Handle ToleranceNotOnBothEnds migration tolerances", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "37d61d1465f7974a2a63db8fbd0500cde103b47c", "submitter": { "id": 69187, "url": "http://patchwork.ozlabs.org/api/1.1/people/69187/?format=api", "name": "Eric Auger", "email": "eric.auger@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260420140552.104369-3-eric.auger@redhat.com/mbox/", "series": [ { "id": 500612, "url": "http://patchwork.ozlabs.org/api/1.1/series/500612/?format=api", "web_url": "http://patchwork.ozlabs.org/project/qemu-devel/list/?series=500612", "date": "2026-04-20T14:03:52", "name": "[v10,1/7] target/arm/cpu: Introduce the infrastructure for cpreg migration tolerances", "version": 10, "mbox": "http://patchwork.ozlabs.org/series/500612/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225170/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225170/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 (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=DJ+H5oPS;\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=lists1p.gnu.org;\n envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org;\n receiver=patchwork.ozlabs.org)" ], "Received": [ "from lists1p.gnu.org (lists1p.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 4fznNz0D2hz1yGs\n\tfor <incoming@patchwork.ozlabs.org>; Tue, 21 Apr 2026 00:07:13 +1000 (AEST)", "from localhost ([::1] helo=lists1p.gnu.org)\n\tby lists1p.gnu.org with esmtp (Exim 4.90_1)\n\t(envelope-from <qemu-devel-bounces@nongnu.org>)\n\tid 1wEpGz-00034D-4p; Mon, 20 Apr 2026 10:06:50 -0400", "from eggs.gnu.org ([2001:470:142:3::10])\n by lists1p.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <eric.auger@redhat.com>)\n id 1wEpGZ-0002zs-MP\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 10:06:25 -0400", "from us-smtp-delivery-124.mimecast.com ([170.10.129.124])\n by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256)\n (Exim 4.90_1) (envelope-from <eric.auger@redhat.com>)\n id 1wEpGS-0001Nm-Fg\n for qemu-devel@nongnu.org; Mon, 20 Apr 2026 10:06:19 -0400", "from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com\n (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by\n relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3,\n cipher=TLS_AES_256_GCM_SHA384) id us-mta-195-exluTlvPNZ69tqYtia2L2Q-1; Mon,\n 20 Apr 2026 10:06:10 -0400", "from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com\n (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93])\n (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest\n SHA256)\n (No client certificate requested)\n by mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS\n id 992C319560B9; Mon, 20 Apr 2026 14:06:09 +0000 (UTC)", "from laptop.redhat.com (unknown [10.44.32.74])\n by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP\n id 5791F180047F; Mon, 20 Apr 2026 14:06:05 +0000 (UTC)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1776693975;\n h=from:from:reply-to:subject:subject:date:date:message-id:message-id:\n to:to:cc:mime-version:mime-version:\n content-transfer-encoding:content-transfer-encoding:\n in-reply-to:in-reply-to:references:references;\n bh=p01fZPFdY51Zmpaz9NyifZyaadu4zisCZRuTPFsPKmk=;\n b=DJ+H5oPSzMyJAM56m8Vi1z7OhEBVDp0M34CrygUnrtp3hCta9F7XzufzFuV1IprNLx6Btl\n x5rKBwm8GJWFZRA3GdFjnHx5vZ9jqDdg7IeepBgZ6D/4fDLtX2Ckc0HacBcXcU5PE8Xv3Z\n h7+17XDyS58zOFlZPiX4kbxuVQzJvhg=", "X-MC-Unique": "exluTlvPNZ69tqYtia2L2Q-1", "X-Mimecast-MFC-AGG-ID": "exluTlvPNZ69tqYtia2L2Q_1776693969", "From": "Eric Auger <eric.auger@redhat.com>", "To": "eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org,\n qemu-arm@nongnu.org, peter.maydell@linaro.org, cohuck@redhat.com,\n sebott@redhat.com, peterx@redhat.com, philmd@linaro.org,\n alex.bennee@linaro.org", "Subject": "[PATCH v10 2/7] target/arm/machine: Handle ToleranceNotOnBothEnds\n migration tolerances", "Date": "Mon, 20 Apr 2026 16:03:52 +0200", "Message-ID": "<20260420140552.104369-3-eric.auger@redhat.com>", "In-Reply-To": "<20260420140552.104369-1-eric.auger@redhat.com>", "References": "<20260420140552.104369-1-eric.auger@redhat.com>", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.93", "Received-SPF": "pass client-ip=170.10.129.124;\n envelope-from=eric.auger@redhat.com; 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, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001,\n SPF_HELO_PASS=-0.001, 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": "If there is a mismatch between the cpreg indexes found on both ends,\ncheck whether a tolerance was registered for the given kvmidx. If any,\nsilence warning/errors.\n\nSigned-off-by: Eric Auger <eric.auger@redhat.com>\nReviewed-by: Peter Maydell <peter.maydell@linaro.org>\n\n---\n\nv9 -> v10\n- s/shall/should\n- remove obsolete desc about helper in commit description\n- Added Peter's R-b\n- Reworded the commit message\n---\n target/arm/machine.c | 21 +++++++++++++++------\n target/arm/trace-events | 2 ++\n 2 files changed, 17 insertions(+), 6 deletions(-)", "diff": "diff --git a/target/arm/machine.c b/target/arm/machine.c\nindex b0e499515cf..8a698f601c6 100644\n--- a/target/arm/machine.c\n+++ b/target/arm/machine.c\n@@ -1065,25 +1065,34 @@ static void handle_cpreg_missing_in_incoming_stream(ARMCPU *cpu, uint64_t kvmidx\n {\n g_autofree gchar *name = print_register_name(kvmidx);\n \n+ if (arm_cpu_match_cpreg_mig_tolerance(cpu, kvmidx,\n+ 0, 0, ToleranceNotOnBothEnds)) {\n+ trace_tolerate_cpreg_missing_in_incoming_stream(name);\n+ return;\n+ }\n warn_report(\"%s: %s \"\n \"expected by the destination but not in the incoming stream: \"\n \"skip it\", __func__, name);\n }\n \n /*\n- * Handle the situation where @kvmidx is in the incoming stream\n- * but not on destination. This currently fails the migration but\n- * we plan to accomodate some exceptions, hence the boolean returned value.\n+ * Handle the situation where @kvmidx is in the incoming\n+ * stream but not on destination. This fails the migration if\n+ * no cpreg mig tolerance is matched for this @kvmidx\n+ * Return true if the migration should eventually fail\n */\n static bool handle_cpreg_only_in_incoming_stream(ARMCPU *cpu, uint64_t kvmidx)\n {\n g_autofree gchar *name = print_register_name(kvmidx);\n- bool fail = true;\n \n+ if (arm_cpu_match_cpreg_mig_tolerance(cpu, kvmidx,\n+ 0, 0, ToleranceNotOnBothEnds)) {\n+ trace_tolerate_cpreg_only_in_incoming_stream(name);\n+ return false;\n+ }\n error_report(\"%s: %s in the incoming stream but unknown on the \"\n \"destination: fail migration\", __func__, name);\n-\n- return fail;\n+ return true;\n }\n \n static int cpu_post_load(void *opaque, int version_id)\ndiff --git a/target/arm/trace-events b/target/arm/trace-events\nindex 2de0406f784..8502fb3265c 100644\n--- a/target/arm/trace-events\n+++ b/target/arm/trace-events\n@@ -29,3 +29,5 @@ arm_psci_call(uint64_t x0, uint64_t x1, uint64_t x2, uint64_t x3, uint32_t cpuid\n \n # machine.c\n cpu_post_load(uint32_t cpreg_vmstate_array_len, uint32_t cpreg_array_len) \"cpreg_vmstate_array_len=%d cpreg_array_len=%d\"\n+tolerate_cpreg_missing_in_incoming_stream(char *name) \"%s is missing in incoming stream but this is explicitly tolerated\"\n+tolerate_cpreg_only_in_incoming_stream(char *name) \"%s is in incoming stream but not on destination but this is explicitly tolerated\"\n", "prefixes": [ "v10", "2/7" ] }