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d0e5a8f293
Memory hotplug can fail for some combinations of RAM and maxmem when DDW is enabled in the presence of devices like nec-usb-xhci. DDW depends on maximum addressable memory returned by guest and this value is currently being calculated wrongly by the guest kernel routine memory_hotplug_max(). While there is an attempt to fix the guest kernel, this patch works around the problem within QEMU itself. memory_hotplug_max() routine in the guest kernel arrives at max addressable memory by multiplying lmb-size with the lmb-count obtained from ibm,dynamic-memory property. There are two assumptions here: - All LMBs are part of ibm,dynamic memory: This is not true for PowerKVM where only hot-pluggable LMBs are present in this property. - The memory area comprising of RAM and hotplug region is contiguous: This needn't be true always for PowerKVM as there can be gap between boot time RAM and hotplug region. To work around this guest kernel bug, ensure that ibm,dynamic-memory has information about all the LMBs (RMA, boot-time LMBs, future hotpluggable LMBs, and dummy LMBs to cover the gap between RAM and hotpluggable region). RMA is represented separately by memory@0 node. Hence mark RMA LMBs and also the LMBs for the gap b/n RAM and hotpluggable region as reserved and as having no valid DRC so that these LMBs are not considered by the guest. Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com> Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> |
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| .. | ||
| e500-ccsr.h | ||
| e500.c | ||
| e500.h | ||
| e500plat.c | ||
| mac_newworld.c | ||
| mac_oldworld.c | ||
| mac.h | ||
| Makefile.objs | ||
| mpc8544_guts.c | ||
| mpc8544ds.c | ||
| ppc4xx_devs.c | ||
| ppc4xx_pci.c | ||
| ppc405_boards.c | ||
| ppc405_uc.c | ||
| ppc405.h | ||
| ppc440_bamboo.c | ||
| ppc_booke.c | ||
| ppc.c | ||
| ppce500_spin.c | ||
| prep.c | ||
| spapr_drc.c | ||
| spapr_events.c | ||
| spapr_hcall.c | ||
| spapr_iommu.c | ||
| spapr_pci_vfio.c | ||
| spapr_pci.c | ||
| spapr_rng.c | ||
| spapr_rtas.c | ||
| spapr_rtc.c | ||
| spapr_vio.c | ||
| spapr.c | ||
| virtex_ml507.c | ||