diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2017-03-10 12:41:13 +1100 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2017-04-26 12:00:41 +1000 |
| commit | d6ee2a7c85088d587fb0e0376fba1fa20d59c9f3 (patch) | |
| tree | 815d0adc9e6a674b494fda930779436f78c08c0b /hw | |
| parent | 9d169fb3c8c8434124677afa52824c4b15b62b65 (diff) | |
target-ppc: kvm: make use of KVM_CREATE_SPAPR_TCE_64
KVM_CAP_SPAPR_TCE capability allows creating TCE tables in KVM which
allows having in-kernel acceleration for H_PUT_TCE_xxx hypercalls.
However it only supports 32bit DMA windows at zero bus offset.
There is a new KVM_CAP_SPAPR_TCE_64 capability which supports 64bit
window size, variable page size and bus offset.
This makes use of the new capability. The kernel headers are already
updated as the kernel support went in to v4.6.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/ppc/spapr_iommu.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c index ae30bbe30f..29c80bb3c8 100644 --- a/hw/ppc/spapr_iommu.c +++ b/hw/ppc/spapr_iommu.c @@ -79,15 +79,16 @@ static IOMMUAccessFlags spapr_tce_iommu_access_flags(uint64_t tce) static uint64_t *spapr_tce_alloc_table(uint32_t liobn, uint32_t page_shift, + uint64_t bus_offset, uint32_t nb_table, int *fd, bool need_vfio) { uint64_t *table = NULL; - uint64_t window_size = (uint64_t)nb_table << page_shift; - if (kvm_enabled() && !(window_size >> 32)) { - table = kvmppc_create_spapr_tce(liobn, window_size, fd, need_vfio); + if (kvm_enabled()) { + table = kvmppc_create_spapr_tce(liobn, page_shift, bus_offset, nb_table, + fd, need_vfio); } if (!table) { @@ -342,6 +343,7 @@ void spapr_tce_table_enable(sPAPRTCETable *tcet, tcet->nb_table = nb_table; tcet->table = spapr_tce_alloc_table(tcet->liobn, tcet->page_shift, + tcet->bus_offset, tcet->nb_table, &tcet->fd, tcet->need_vfio); |