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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2015-05-07 15:33:28 +1000 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2015-06-03 23:56:50 +0200 |
| commit | 12fd28535891572be7aaf862a03019257dafa425 (patch) | |
| tree | 62fed9730d8aaf4098b0ee69de15d4d7c58946cd | |
| parent | 421b1b27f6e9135ac8f01db219e0d8c0cefd7e71 (diff) | |
| download | qemu-12fd28535891572be7aaf862a03019257dafa425.tar.gz qemu-12fd28535891572be7aaf862a03019257dafa425.tar.bz2 qemu-12fd28535891572be7aaf862a03019257dafa425.zip | |
spapr_iommu: Disable in-kernel IOMMU tables for >4GB windows
The existing KVM_CREATE_SPAPR_TCE ioctl only support 4G windows max as
the window size parameter to the kernel ioctl() is 32-bit so
there's no way of expressing a TCE window > 4GB.
We are going to add huge DMA windows support so this will create small
window and unexpectedly fail later.
This disables KVM_CREATE_SPAPR_TCE for windows bigger that 4GB.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
| -rw-r--r-- | hw/ppc/spapr_iommu.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c index f3990fdc32..e19bf89929 100644 --- a/hw/ppc/spapr_iommu.c +++ b/hw/ppc/spapr_iommu.c @@ -126,11 +126,11 @@ static MemoryRegionIOMMUOps spapr_iommu_ops = { static int spapr_tce_table_realize(DeviceState *dev) { sPAPRTCETable *tcet = SPAPR_TCE_TABLE(dev); + uint64_t window_size = (uint64_t)tcet->nb_table << tcet->page_shift; - if (kvm_enabled()) { + if (kvm_enabled() && !(window_size >> 32)) { tcet->table = kvmppc_create_spapr_tce(tcet->liobn, - tcet->nb_table << - tcet->page_shift, + window_size, &tcet->fd, tcet->vfio_accel); } |