From patchwork Fri May 5 20:47:41 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Henrique Barboza X-Patchwork-Id: 759176 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3wKPC54scGz9s7h for ; Sat, 6 May 2017 06:49:21 +1000 (AEST) Received: from localhost ([::1]:48974 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6kAB-0005Dl-60 for incoming@patchwork.ozlabs.org; Fri, 05 May 2017 16:49:19 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33887) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d6k97-0004wc-Ut for qemu-devel@nongnu.org; Fri, 05 May 2017 16:48:17 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d6k94-0006TS-Pt for qemu-devel@nongnu.org; Fri, 05 May 2017 16:48:13 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:51293 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 1d6k94-0006T7-K0 for qemu-devel@nongnu.org; Fri, 05 May 2017 16:48:10 -0400 Received: from pps.filterd (m0098414.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v45KhjfX073085 for ; Fri, 5 May 2017 16:48:10 -0400 Received: from e24smtp04.br.ibm.com (e24smtp04.br.ibm.com [32.104.18.25]) by mx0b-001b2d01.pphosted.com with ESMTP id 2a8wrufm67-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Fri, 05 May 2017 16:48:09 -0400 Received: from localhost by e24smtp04.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Fri, 5 May 2017 17:48:05 -0300 Received: from d24av04.br.ibm.com (d24av04.br.ibm.com [9.8.31.97]) by d24relay03.br.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id v45Km00B33030356; Fri, 5 May 2017 17:48:00 -0300 Received: from d24av04.br.ibm.com (localhost [127.0.0.1]) by d24av04.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id v45KlxjF013940; Fri, 5 May 2017 17:47:59 -0300 Received: from arthas.ibm.com ([9.80.215.128]) by d24av04.br.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id v45KlsiW013854; Fri, 5 May 2017 17:47:57 -0300 From: Daniel Henrique Barboza To: qemu-devel@nongnu.org Date: Fri, 5 May 2017 17:47:41 -0300 X-Mailer: git-send-email 2.9.3 In-Reply-To: <20170505204746.14116-1-danielhb@linux.vnet.ibm.com> References: <20170505204746.14116-1-danielhb@linux.vnet.ibm.com> X-TM-AS-MML: disable x-cbid: 17050520-0028-0000-0000-000001B1BE7C X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 17050520-0029-0000-0000-000014B1F226 Message-Id: <20170505204746.14116-2-danielhb@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2017-05-05_16:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=3 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1703280000 definitions=main-1705050194 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 v9 1/6] hw/ppc/spapr.c: adding pending_dimm_unplugs to sPAPRMachineState 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: qemu-ppc@nongnu.org, mdroth@linux.vnet.ibm.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" The LMB DRC release callback, spapr_lmb_release(), uses an opaque parameter, a sPAPRDIMMState struct that stores the current LMBs that are allocated to a DIMM (nr_lmbs). After each call to this callback, the nr_lmbs is decremented by one and, when it reaches zero, the callback proceeds with the qdev calls to hot unplug the LMB. Using drc->detach_cb_opaque is problematic because it can't be migrated in the future DRC migration work. This patch makes the following changes to eliminate the usage of this opaque callback inside spapr_lmb_release: - sPAPRDIMMState was moved from spapr.c and added to spapr.h. A new attribute called 'addr' was added to it. This is used as an unique identifier to associate a sPAPRDIMMState to a PCDIMM element. - sPAPRMachineState now hosts a new QTAILQ called 'pending_dimm_unplugs'. This queue of sPAPRDIMMState elements will store the DIMM state of DIMMs that are currently going under an unplug process. - spapr_lmb_release() will now retrieve the nr_lmbs value by getting the correspondent sPAPRDIMMState. A helper function called spapr_dimm_get_address was created to fetch the address of a PCDIMM device inside spapr_lmb_release. When nr_lmbs reaches zero and the callback proceeds with the qdev hot unplug calls, the sPAPRDIMMState struct is removed from spapr->pending_dimm_unplugs. After these changes, the opaque argument for spapr_lmb_release is now unused and is passed as NULL inside spapr_del_lmbs. This and the other opaque arguments can now be safely removed from the code. Signed-off-by: Daniel Henrique Barboza --- hw/ppc/spapr.c | 54 ++++++++++++++++++++++++++++++++++++++++++++------ include/hw/ppc/spapr.h | 17 ++++++++++++++++ 2 files changed, 65 insertions(+), 6 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 80d12d0..346c827 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2043,6 +2043,7 @@ static void ppc_spapr_init(MachineState *machine) msi_nonbroken = true; QLIST_INIT(&spapr->phbs); + QTAILQ_INIT(&spapr->pending_dimm_unplugs); /* Allocate RMA if necessary */ rma_alloc_size = kvmppc_alloc_rma(&rma); @@ -2596,20 +2597,32 @@ out: error_propagate(errp, local_err); } -typedef struct sPAPRDIMMState { - uint32_t nr_lmbs; -} sPAPRDIMMState; +static uint64_t spapr_dimm_get_address(PCDIMMDevice *dimm) +{ + Error *local_err = NULL; + uint64_t addr; + addr = object_property_get_int(OBJECT(dimm), PC_DIMM_ADDR_PROP, + &local_err); + if (local_err) { + error_propagate(&error_abort, local_err); + return 0; + } + return addr; +} static void spapr_lmb_release(DeviceState *dev, void *opaque) { - sPAPRDIMMState *ds = (sPAPRDIMMState *)opaque; HotplugHandler *hotplug_ctrl; + uint64_t addr = spapr_dimm_get_address(PC_DIMM(dev)); + sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); + sPAPRDIMMState *ds = spapr_pending_dimm_unplugs_find(spapr, addr); + if (--ds->nr_lmbs) { return; } - g_free(ds); + spapr_pending_dimm_unplugs_remove(spapr, ds); /* * Now that all the LMBs have been removed by the guest, call the @@ -2626,17 +2639,20 @@ static void spapr_del_lmbs(DeviceState *dev, uint64_t addr_start, uint64_t size, sPAPRDRConnectorClass *drck; uint32_t nr_lmbs = size / SPAPR_MEMORY_BLOCK_SIZE; int i; + sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); sPAPRDIMMState *ds = g_malloc0(sizeof(sPAPRDIMMState)); uint64_t addr = addr_start; ds->nr_lmbs = nr_lmbs; + ds->addr = addr_start; + spapr_pending_dimm_unplugs_add(spapr, ds); for (i = 0; i < nr_lmbs; i++) { drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_LMB, addr / SPAPR_MEMORY_BLOCK_SIZE); g_assert(drc); drck = SPAPR_DR_CONNECTOR_GET_CLASS(drc); - drck->detach(drc, dev, spapr_lmb_release, ds, errp); + drck->detach(drc, dev, spapr_lmb_release, NULL, errp); addr += SPAPR_MEMORY_BLOCK_SIZE; } @@ -3515,3 +3531,29 @@ static void spapr_machine_register_types(void) } type_init(spapr_machine_register_types) + +sPAPRDIMMState *spapr_pending_dimm_unplugs_find(sPAPRMachineState *spapr, + uint64_t addr) +{ + sPAPRDIMMState *dimm_state = NULL; + QTAILQ_FOREACH(dimm_state, &spapr->pending_dimm_unplugs, next) { + if (dimm_state->addr == addr) { + break; + } + } + return dimm_state; +} + +void spapr_pending_dimm_unplugs_add(sPAPRMachineState *spapr, + sPAPRDIMMState *dimm_state) +{ + g_assert(!spapr_pending_dimm_unplugs_find(spapr, dimm_state->addr)); + QTAILQ_INSERT_HEAD(&spapr->pending_dimm_unplugs, dimm_state, next); +} + +void spapr_pending_dimm_unplugs_remove(sPAPRMachineState *spapr, + sPAPRDIMMState *dimm_state) +{ + QTAILQ_REMOVE(&spapr->pending_dimm_unplugs, dimm_state, next); + g_free(dimm_state); +} diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 5802f88..3e2b5ab 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -32,6 +32,7 @@ struct sPAPRRTCState { int64_t ns_offset; }; +typedef struct sPAPRDIMMState sPAPRDIMMState; typedef struct sPAPRMachineClass sPAPRMachineClass; #define TYPE_SPAPR_MACHINE "spapr-machine" @@ -104,6 +105,9 @@ struct sPAPRMachineState { /* RTAS state */ QTAILQ_HEAD(, sPAPRConfigureConnectorState) ccs_list; + /* pending DIMM unplug queue */ + QTAILQ_HEAD(, sPAPRDIMMState) pending_dimm_unplugs; + /*< public >*/ char *kvm_type; MemoryHotplugState hotplug_memory; @@ -646,6 +650,19 @@ struct sPAPRConfigureConnectorState { void spapr_ccs_reset_hook(void *opaque); +struct sPAPRDIMMState { + uint64_t addr; + uint32_t nr_lmbs; + QTAILQ_ENTRY(sPAPRDIMMState) next; +}; + +sPAPRDIMMState *spapr_pending_dimm_unplugs_find(sPAPRMachineState *spapr, + uint64_t addr); +void spapr_pending_dimm_unplugs_add(sPAPRMachineState *spapr, + sPAPRDIMMState *dimm_state); +void spapr_pending_dimm_unplugs_remove(sPAPRMachineState *spapr, + sPAPRDIMMState *dimm_state); + void spapr_rtc_read(sPAPRRTCState *rtc, struct tm *tm, uint32_t *ns); int spapr_rtc_import_offset(sPAPRRTCState *rtc, int64_t legacy_offset);