From aef87d1b879416909a4ac73e6fe2cea4a5630f40 Mon Sep 17 00:00:00 2001 From: Gavin Shan Date: Thu, 2 Jul 2015 16:23:27 +1000 Subject: [PATCH] sPAPR: Reenable EEH functionality on reboot When rebooting the guest, some PEs might be in frozen state. The contained PCI devices won't work properly if their frozen states aren't cleared in time. One case running into this situation would be maximal EEH error times encountered in the guest. The patch reenables the EEH functinality on PEs on PHB's reset callback, which will clear their frozen states if needed. Signed-off-by: Gavin Shan Reviewed-by: David Gibson Signed-off-by: David Gibson Signed-off-by: Alexander Graf --- hw/ppc/spapr_pci_vfio.c | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr_pci_vfio.c b/hw/ppc/spapr_pci_vfio.c index 99a1be51131e..8104074798a2 100644 --- a/hw/ppc/spapr_pci_vfio.c +++ b/hw/ppc/spapr_pci_vfio.c @@ -71,9 +71,26 @@ static void spapr_phb_vfio_finish_realize(sPAPRPHBState *sphb, Error **errp) spapr_tce_get_iommu(tcet)); } +static void spapr_phb_vfio_eeh_reenable(sPAPRPHBVFIOState *svphb) +{ + struct vfio_eeh_pe_op op = { + .argsz = sizeof(op), + .op = VFIO_EEH_PE_ENABLE + }; + + vfio_container_ioctl(&svphb->phb.iommu_as, + svphb->iommugroupid, VFIO_EEH_PE_OP, &op); +} + static void spapr_phb_vfio_reset(DeviceState *qdev) { - /* Do nothing */ + /* + * The PE might be in frozen state. To reenable the EEH + * functionality on it will clean the frozen state, which + * ensures that the contained PCI devices will work properly + * after reboot. + */ + spapr_phb_vfio_eeh_reenable(SPAPR_PCI_VFIO_HOST_BRIDGE(qdev)); } static int spapr_phb_vfio_eeh_set_option(sPAPRPHBState *sphb,