From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 765C3C10F14 for ; Thu, 10 Oct 2019 07:08:11 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4B6322190F for ; Thu, 10 Oct 2019 07:08:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4B6322190F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.ibm.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34534 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iISYT-0000NK-RL for qemu-devel@archiver.kernel.org; Thu, 10 Oct 2019 03:08:09 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:48147) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iISRS-0003OF-U2 for qemu-devel@nongnu.org; Thu, 10 Oct 2019 03:00:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iISRR-0008Op-5x for qemu-devel@nongnu.org; Thu, 10 Oct 2019 03:00:54 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:18032 helo=mx0a-001b2d01.pphosted.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iISRR-0008Oh-1W for qemu-devel@nongnu.org; Thu, 10 Oct 2019 03:00:53 -0400 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x9A6v81r146774 for ; Thu, 10 Oct 2019 03:00:52 -0400 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2vhyqx09a3-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Thu, 10 Oct 2019 03:00:52 -0400 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 10 Oct 2019 08:00:48 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x9A70HNI25231718 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 10 Oct 2019 07:00:17 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CED5B11C05E; Thu, 10 Oct 2019 07:00:47 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3D45A11C05B; Thu, 10 Oct 2019 07:00:46 +0000 (GMT) Received: from localhost.in.ibm.com (unknown [9.124.35.97]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 10 Oct 2019 07:00:46 +0000 (GMT) From: Ganesh Goudar To: aik@ozlabs.ru, qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Subject: [PATCH v16 6/7] migration: Include migration support for machine check handling Date: Thu, 10 Oct 2019 12:29:49 +0530 X-Mailer: git-send-email 2.17.2 In-Reply-To: <20191010065950.23169-1-ganeshgr@linux.ibm.com> References: <20191010065950.23169-1-ganeshgr@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19101007-4275-0000-0000-00000370C273 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19101007-4276-0000-0000-00003883C8CC Message-Id: <20191010065950.23169-7-ganeshgr@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-10-10_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910100064 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: paulus@ozlabs.org, arawinda.p@gmail.com, Ganesh Goudar , groug@kaod.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Aravinda Prasad This patch includes migration support for machine check handling. Especially this patch blocks VM migration requests until the machine check error handling is complete as these errors are specific to the source hardware and is irrelevant on the target hardware. [Do not set FWNMI cap in post_load, now its done in .apply hook] Signed-off-by: Ganesh Goudar Signed-off-by: Aravinda Prasad --- hw/ppc/spapr.c | 41 +++++++++++++++++++++++++++++++++++++++++ hw/ppc/spapr_events.c | 16 +++++++++++++++- hw/ppc/spapr_rtas.c | 2 ++ include/hw/ppc/spapr.h | 2 ++ 4 files changed, 60 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 328da3f88a..eac3123d83 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -46,6 +46,7 @@ #include "migration/qemu-file-types.h" #include "migration/global_state.h" #include "migration/register.h" +#include "migration/blocker.h" #include "mmu-hash64.h" #include "mmu-book3s-v3.h" #include "cpu-models.h" @@ -1759,6 +1760,8 @@ static void spapr_machine_reset(MachineState *machine) /* Signal all vCPUs waiting on this condition */ qemu_cond_broadcast(&spapr->mc_delivery_cond); + + migrate_del_blocker(spapr->fwnmi_migration_blocker); } static void spapr_create_nvram(SpaprMachineState *spapr) @@ -2049,6 +2052,43 @@ static const VMStateDescription vmstate_spapr_dtb = { }, }; +static bool spapr_fwnmi_needed(void *opaque) +{ + SpaprMachineState *spapr = (SpaprMachineState *)opaque; + + return spapr->guest_machine_check_addr != -1; +} + +static int spapr_fwnmi_pre_save(void *opaque) +{ + SpaprMachineState *spapr = (SpaprMachineState *)opaque; + + /* + * With -only-migratable QEMU option, we cannot block migration. + * Hence check if machine check handling is in progress and print + * a warning message. + */ + if (spapr->mc_status != -1) { + warn_report("A machine check is being handled during migration. The" + "handler may run and log hardware error on the destination"); + } + + return 0; +} + +static const VMStateDescription vmstate_spapr_machine_check = { + .name = "spapr_machine_check", + .version_id = 1, + .minimum_version_id = 1, + .needed = spapr_fwnmi_needed, + .pre_save = spapr_fwnmi_pre_save, + .fields = (VMStateField[]) { + VMSTATE_UINT64(guest_machine_check_addr, SpaprMachineState), + VMSTATE_INT32(mc_status, SpaprMachineState), + VMSTATE_END_OF_LIST() + }, +}; + static const VMStateDescription vmstate_spapr = { .name = "spapr", .version_id = 3, @@ -2082,6 +2122,7 @@ static const VMStateDescription vmstate_spapr = { &vmstate_spapr_dtb, &vmstate_spapr_cap_large_decr, &vmstate_spapr_cap_ccf_assist, + &vmstate_spapr_machine_check, NULL } }; diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c index db44e09154..30d9371c88 100644 --- a/hw/ppc/spapr_events.c +++ b/hw/ppc/spapr_events.c @@ -43,6 +43,7 @@ #include "qemu/main-loop.h" #include "hw/ppc/spapr_ovec.h" #include +#include "migration/blocker.h" #define RTAS_LOG_VERSION_MASK 0xff000000 #define RTAS_LOG_VERSION_6 0x06000000 @@ -842,6 +843,8 @@ void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered) { SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); CPUState *cs = CPU(cpu); + int ret; + Error *local_err = NULL; if (spapr->guest_machine_check_addr == -1) { /* @@ -871,8 +874,19 @@ void spapr_mce_req_event(PowerPCCPU *cpu, bool recovered) return; } } - spapr->mc_status = cpu->vcpu_id; + ret = migrate_add_blocker(spapr->fwnmi_migration_blocker, &local_err); + if (ret == -EBUSY) { + /* + * We don't want to abort so we let the migration to continue. + * In a rare case, the machine check handler will run on the target. + * Though this is not preferable, it is better than aborting + * the migration or killing the VM. + */ + warn_report_err(local_err); + } + + spapr->mc_status = cpu->vcpu_id; spapr_mce_dispatch_elog(cpu, recovered); } diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index 0328b1f341..c78d96ee7e 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -50,6 +50,7 @@ #include "hw/ppc/fdt.h" #include "target/ppc/mmu-hash64.h" #include "target/ppc/mmu-book3s-v3.h" +#include "migration/blocker.h" static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr, uint32_t token, uint32_t nargs, @@ -446,6 +447,7 @@ static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu, */ spapr->mc_status = -1; qemu_cond_signal(&spapr->mc_delivery_cond); + migrate_del_blocker(spapr->fwnmi_migration_blocker); rtas_st(rets, 0, RTAS_OUT_SUCCESS); } diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index fa280c956e..84b32fd176 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -215,6 +215,8 @@ struct SpaprMachineState { unsigned gpu_numa_id; SpaprTpmProxy *tpm_proxy; + + Error *fwnmi_migration_blocker; }; #define H_SUCCESS 0 -- 2.17.2