From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44858) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dBS9j-0002as-Cc for qemu-devel@nongnu.org; Thu, 18 May 2017 16:36:23 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dBS9e-0005vD-DD for qemu-devel@nongnu.org; Thu, 18 May 2017 16:36:19 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:36395 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 1dBS9e-0005uv-8A for qemu-devel@nongnu.org; Thu, 18 May 2017 16:36:14 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.20/8.16.0.20) with SMTP id v4IKY4Zr099777 for ; Thu, 18 May 2017 16:36:13 -0400 Received: from e24smtp02.br.ibm.com (e24smtp02.br.ibm.com [32.104.18.86]) by mx0b-001b2d01.pphosted.com with ESMTP id 2ahjca10ch-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Thu, 18 May 2017 16:36:13 -0400 Received: from localhost by e24smtp02.br.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 18 May 2017 17:36:11 -0300 From: Daniel Henrique Barboza Date: Thu, 18 May 2017 17:35:47 -0300 In-Reply-To: <20170518203548.14207-1-danielhb@linux.vnet.ibm.com> References: <20170518203548.14207-1-danielhb@linux.vnet.ibm.com> Message-Id: <20170518203548.14207-5-danielhb@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v10 4/5] hw/ppc/spapr.c: recover pending LMB unplug info in spapr_lmb_release List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: qemu-ppc@nongnu.org, david@gibson.dropbear.id.au, mdroth@linux.vnet.ibm.com When a LMB hot unplug starts, the current DRC LMB status is stored at spapr->pending_dimm_unplugs QTAILQ. This queue isn't migrated, thus if a migration occurs in the middle of a LMB unplug the spapr_lmb_release callback will lost track of the LMB unplug progress. This patch implements a new recover function spapr_recover_pending_dimm_state that is used inside spapr_lmb_release to recover this DRC LMB release status that is lost during the migration. Signed-off-by: Daniel Henrique Barboza --- hw/ppc/spapr.c | 39 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 38 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 5602cfc..7d304fc 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2649,6 +2649,36 @@ static uint64_t spapr_dimm_get_address(PCDIMMDevice *dimm) return addr; } +static sPAPRDIMMState *spapr_recover_pending_dimm_state(PCDIMMDevice *dimm, + uint64_t addr) +{ + sPAPRDRConnector *drc; + PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm); + MemoryRegion *mr = ddc->get_memory_region(dimm); + uint64_t curr_addr = addr; + uint64_t size = memory_region_size(mr); + uint32_t nr_lmbs = size / SPAPR_MEMORY_BLOCK_SIZE; + uint32_t avail_lmbs = 0; + int i = 0; + + for (i = 0; i < nr_lmbs; i++) { + drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_LMB, + curr_addr / SPAPR_MEMORY_BLOCK_SIZE); + g_assert(drc); + if (drc->indicator_state != SPAPR_DR_INDICATOR_STATE_INACTIVE) { + avail_lmbs++; + } + curr_addr += SPAPR_MEMORY_BLOCK_SIZE; + } + + sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); + sPAPRDIMMState *ds = g_malloc0(sizeof(sPAPRDIMMState)); + ds->nr_lmbs = avail_lmbs; + ds->addr = addr; + spapr_pending_dimm_unplugs_add(spapr, ds); + return ds; +} + /* Callback to be called during DRC release. */ void spapr_lmb_release(DeviceState *dev) { @@ -2657,7 +2687,14 @@ void spapr_lmb_release(DeviceState *dev) sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); sPAPRDIMMState *ds = spapr_pending_dimm_unplugs_find(spapr, addr); - if (--ds->nr_lmbs) { + /* This information will get lost if a migration occurs + * during the unplug process. In this case recover it. */ + if (ds == NULL) { + ds = spapr_recover_pending_dimm_state(PC_DIMM(dev), addr); + if (ds->nr_lmbs) { + return; + } + } else if (--ds->nr_lmbs) { return; } -- 2.9.4