From 5dd5238c0b5cc42d347128227f124fe31b05832d Mon Sep 17 00:00:00 2001 From: Jianjun Duan Date: Tue, 24 May 2016 10:55:04 -0700 Subject: [PATCH] spapr: ensure device trees are always associated with DRC There are possible racing situations involving hotplug events and guest migration. For cases where a hotplug event is migrated, or the guest is in the process of fetching device tree at the time of migration, we need to ensure the device tree is created and associated with the corresponding DRC for devices that were hotplugged on the source, but 'coldplugged' on the target. Signed-off-by: Jianjun Duan Signed-off-by: David Gibson --- hw/ppc/spapr.c | 16 ++++++---------- hw/ppc/spapr_pci.c | 12 +++++------- 2 files changed, 11 insertions(+), 17 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 3b0845f158..44e401ae99 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -2136,15 +2136,6 @@ static void spapr_add_lmbs(DeviceState *dev, uint64_t addr, uint64_t size, int i, fdt_offset, fdt_size; void *fdt; - /* - * Check for DRC connectors and send hotplug notification to the - * guest only in case of hotplugged memory. This allows cold plugged - * memory to be specified at boot time. - */ - if (!dev->hotplugged) { - return; - } - for (i = 0; i < nr_lmbs; i++) { drc = spapr_dr_connector_by_id(SPAPR_DR_CONNECTOR_TYPE_LMB, addr/SPAPR_MEMORY_BLOCK_SIZE); @@ -2158,7 +2149,12 @@ static void spapr_add_lmbs(DeviceState *dev, uint64_t addr, uint64_t size, drck->attach(drc, dev, fdt, fdt_offset, !dev->hotplugged, errp); addr += SPAPR_MEMORY_BLOCK_SIZE; } - spapr_hotplug_req_add_by_count(SPAPR_DR_CONNECTOR_TYPE_LMB, nr_lmbs); + /* send hotplug notification to the + * guest only in case of hotplugged memory + */ + if (dev->hotplugged) { + spapr_hotplug_req_add_by_count(SPAPR_DR_CONNECTOR_TYPE_LMB, nr_lmbs); + } } static void spapr_memory_plug(HotplugHandler *hotplug_dev, DeviceState *dev, diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index e55b505c96..91a356f851 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1093,13 +1093,11 @@ static void spapr_phb_add_pci_device(sPAPRDRConnector *drc, spapr_tce_set_need_vfio(tcet, true); } - if (dev->hotplugged) { - fdt = create_device_tree(&fdt_size); - fdt_start_offset = spapr_create_pci_child_dt(phb, pdev, fdt, 0); - if (!fdt_start_offset) { - error_setg(errp, "Failed to create pci child device tree node"); - goto out; - } + fdt = create_device_tree(&fdt_size); + fdt_start_offset = spapr_create_pci_child_dt(phb, pdev, fdt, 0); + if (!fdt_start_offset) { + error_setg(errp, "Failed to create pci child device tree node"); + goto out; } drck->attach(drc, DEVICE(pdev), -- 2.11.4.GIT