From nobody Mon Feb 9 22:38:40 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1506595301903149.68488667290092; Thu, 28 Sep 2017 03:41:41 -0700 (PDT) Received: from localhost ([::1]:58384 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dxWG5-00065j-4e for importer@patchew.org; Thu, 28 Sep 2017 06:41:33 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50477) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dxWCl-0003h1-DV for qemu-devel@nongnu.org; Thu, 28 Sep 2017 06:38:08 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dxWCh-0007fW-FJ for qemu-devel@nongnu.org; Thu, 28 Sep 2017 06:38:07 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:42738 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 1dxWCh-0007fP-8n for qemu-devel@nongnu.org; Thu, 28 Sep 2017 06:38:03 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v8SAXtCH046228 for ; Thu, 28 Sep 2017 06:38:00 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0b-001b2d01.pphosted.com with ESMTP id 2d8sda2j3n-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 28 Sep 2017 06:37:59 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Thu, 28 Sep 2017 04:37:56 -0600 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v8SAbsHl29032516; Thu, 28 Sep 2017 03:37:54 -0700 Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id BD8716E10F; Thu, 28 Sep 2017 04:37:54 -0600 (MDT) Received: from [127.0.1.1] (unknown [9.84.218.194]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP id 7FDEC6E10D; Thu, 28 Sep 2017 04:37:51 -0600 (MDT) From: Aravinda Prasad To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org, david@gibson.dropbear.id.au Date: Thu, 28 Sep 2017 16:07:48 +0530 In-Reply-To: <150659494872.25889.2069124544245723984.stgit@aravinda> References: <150659494872.25889.2069124544245723984.stgit@aravinda> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 x-cbid: 17092810-8235-0000-0000-00000C55B4CC X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00007804; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000232; SDB=6.00923539; UDB=6.00464295; IPR=6.00703677; BA=6.00005611; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017301; XFM=3.00000015; UTC=2017-09-28 10:37:58 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17092810-8236-0000-0000-00003DD3EF93 Message-Id: <150659506894.25889.3558250496380782854.stgit@aravinda> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-09-28_04:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=0 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1707230000 definitions=main-1709280158 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.158.5 Subject: [Qemu-devel] [PATCH v5 2/6] ppc: spapr: Handle "ibm, nmi-register" and "ibm, nmi-interlock" RTAS calls X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: aik@ozlabs.ru, benh@au1.ibm.com, paulus@samba.org, sam.bobroff@au1.ibm.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 This patch adds support in QEMU to handle "ibm,nmi-register" and "ibm,nmi-interlock" RTAS calls. The machine check notification address is saved when the OS issues "ibm,nmi-register" RTAS call. This patch also handles the case when multiple processors experience machine check at or about the same time by handling "ibm,nmi-interlock" call. In such cases, as per PAPR, subsequent processors serialize waiting for the first processor to issue the "ibm,nmi-interlock" call. The second processor waits till the first processor, which also received a machine check error, is done reading the error log. The first processor issues "ibm,nmi-interlock" call when the error log is consumed. This patch implements the releasing part of the error-log while subsequent patch (which builds error log) handles the locking part. Signed-off-by: Aravinda Prasad --- hw/ppc/spapr.c | 8 ++++++++ hw/ppc/spapr_rtas.c | 35 +++++++++++++++++++++++++++++++++++ include/hw/ppc/spapr.h | 11 ++++++++++- 3 files changed, 53 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 5deae30..d568ea6 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -1477,6 +1477,11 @@ static void ppc_spapr_reset(void) first_ppc_cpu->env.nip =3D SPAPR_ENTRY_POINT; =20 spapr->cas_reboot =3D false; + + spapr->mc_status =3D -1; + spapr->guest_machine_check_addr =3D 0; + qemu_cond_destroy(&spapr->mc_delivery_cond); + qemu_cond_init(&spapr->mc_delivery_cond); } =20 static void spapr_create_nvram(sPAPRMachineState *spapr) @@ -2598,6 +2603,9 @@ static void ppc_spapr_init(MachineState *machine) =20 kvmppc_spapr_enable_inkernel_multitce(); } + + spapr->mc_status =3D -1; + qemu_cond_init(&spapr->mc_delivery_cond); } =20 static int spapr_kvm_type(const char *vm_type) diff --git a/hw/ppc/spapr_rtas.c b/hw/ppc/spapr_rtas.c index cdf0b60..08e9a5e 100644 --- a/hw/ppc/spapr_rtas.c +++ b/hw/ppc/spapr_rtas.c @@ -348,6 +348,37 @@ static void rtas_get_power_level(PowerPCCPU *cpu, sPAP= RMachineState *spapr, rtas_st(rets, 1, 100); } =20 +static void rtas_ibm_nmi_register(PowerPCCPU *cpu, + sPAPRMachineState *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, + uint32_t nret, target_ulong rets) +{ + spapr->guest_machine_check_addr =3D rtas_ld(args, 1); + rtas_st(rets, 0, RTAS_OUT_SUCCESS); +} + +static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu, + sPAPRMachineState *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, + uint32_t nret, target_ulong rets) +{ + if (!spapr->guest_machine_check_addr) { + /* NMI register not called */ + rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR); + } else { + /* + * VCPU issuing "ibm,nmi-interlock" is done with NMI handling, + * hence unset mc_status. + */ + spapr->mc_status =3D -1; + qemu_cond_signal(&spapr->mc_delivery_cond); + rtas_st(rets, 0, RTAS_OUT_SUCCESS); + } +} + + static struct rtas_call { const char *name; spapr_rtas_fn fn; @@ -489,6 +520,10 @@ static void core_rtas_register_types(void) rtas_set_power_level); spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level", rtas_get_power_level); + spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register", + rtas_ibm_nmi_register); + spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock", + rtas_ibm_nmi_interlock); } =20 type_init(core_rtas_register_types) diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index b395aa7..28b6e2e 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -124,6 +124,13 @@ struct sPAPRMachineState { * occurs during the unplug process. */ QTAILQ_HEAD(, sPAPRDIMMState) pending_dimm_unplugs; =20 + /* State related to "ibm,nmi-register" and "ibm,nmi-interlock" calls */ + target_ulong guest_machine_check_addr; + /* mc_status is set to -1 if mc is not in progress, else is set to the= CPU + * handling the mc. */ + int mc_status; + QemuCond mc_delivery_cond; + /*< public >*/ char *kvm_type; MemoryHotplugState hotplug_memory; @@ -520,8 +527,10 @@ target_ulong spapr_hypercall(PowerPCCPU *cpu, target_u= long opcode, #define RTAS_IBM_CREATE_PE_DMA_WINDOW (RTAS_TOKEN_BASE + 0x27) #define RTAS_IBM_REMOVE_PE_DMA_WINDOW (RTAS_TOKEN_BASE + 0x28) #define RTAS_IBM_RESET_PE_DMA_WINDOW (RTAS_TOKEN_BASE + 0x29) +#define RTAS_IBM_NMI_REGISTER (RTAS_TOKEN_BASE + 0x2A) +#define RTAS_IBM_NMI_INTERLOCK (RTAS_TOKEN_BASE + 0x2B) =20 -#define RTAS_TOKEN_MAX (RTAS_TOKEN_BASE + 0x2A) +#define RTAS_TOKEN_MAX (RTAS_TOKEN_BASE + 0x2C) =20 /* RTAS ibm,get-system-parameter token values */ #define RTAS_SYSPARM_SPLPAR_CHARACTERISTICS 20