From 606b54986df4e3964eee2d74460bd06ed2f384e5 Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Mon, 4 Jul 2016 13:33:03 +1000 Subject: spapr_iommu: Realloc guest visible TCE table when starting/stopping listening The sPAPR TCE tables manage 2 copies when VFIO is using an IOMMU - a guest view of the table and a hardware TCE table. If there is no VFIO presense in the address space, then just the guest view is used, if this is the case, it is allocated in the KVM. However since there is no support yet for VFIO in KVM TCE hypercalls, when we start using VFIO, we need to move the guest view from KVM to the userspace; and we need to do this for every IOMMU on a bus with VFIO devices. This implements the callbacks for the sPAPR IOMMU - notify_started() reallocated the guest view to the user space, notify_stopped() does the opposite. This removes explicit spapr_tce_set_need_vfio() call from PCI hotplug path as the new callbacks do this better - they notify IOMMU at the exact moment when the configuration is changed, and this also includes the case of PCI hot unplug. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson Acked-by: Alex Williamson Signed-off-by: David Gibson --- hw/ppc/spapr_iommu.c | 12 ++++++++++++ hw/ppc/spapr_pci.c | 6 ------ 2 files changed, 12 insertions(+), 6 deletions(-) (limited to 'hw') diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c index e230bacae1..d57b05d5c0 100644 --- a/hw/ppc/spapr_iommu.c +++ b/hw/ppc/spapr_iommu.c @@ -156,6 +156,16 @@ static uint64_t spapr_tce_get_min_page_size(MemoryRegion *iommu) return 1ULL << tcet->page_shift; } +static void spapr_tce_notify_started(MemoryRegion *iommu) +{ + spapr_tce_set_need_vfio(container_of(iommu, sPAPRTCETable, iommu), true); +} + +static void spapr_tce_notify_stopped(MemoryRegion *iommu) +{ + spapr_tce_set_need_vfio(container_of(iommu, sPAPRTCETable, iommu), false); +} + static int spapr_tce_table_post_load(void *opaque, int version_id) { sPAPRTCETable *tcet = SPAPR_TCE_TABLE(opaque); @@ -236,6 +246,8 @@ static const VMStateDescription vmstate_spapr_tce_table = { static MemoryRegionIOMMUOps spapr_iommu_ops = { .translate = spapr_tce_translate_iommu, .get_min_page_size = spapr_tce_get_min_page_size, + .notify_started = spapr_tce_notify_started, + .notify_stopped = spapr_tce_notify_stopped, }; static int spapr_tce_table_realize(DeviceState *dev) diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c index 8c1e6b17c3..cbb7cdd774 100644 --- a/hw/ppc/spapr_pci.c +++ b/hw/ppc/spapr_pci.c @@ -1087,12 +1087,6 @@ static void spapr_phb_add_pci_device(sPAPRDRConnector *drc, void *fdt = NULL; int fdt_start_offset = 0, fdt_size; - if (object_dynamic_cast(OBJECT(pdev), "vfio-pci")) { - sPAPRTCETable *tcet = spapr_tce_find_by_liobn(phb->dma_liobn); - - spapr_tce_set_need_vfio(tcet, true); - } - fdt = create_device_tree(&fdt_size); fdt_start_offset = spapr_create_pci_child_dt(phb, pdev, fdt, 0); if (!fdt_start_offset) { -- cgit v1.2.3