diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_vio_hv.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_vio_hv.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/arch/powerpc/kvm/book3s_64_vio_hv.c b/arch/powerpc/kvm/book3s_64_vio_hv.c index e220fabb2f5d..635f3ca8129a 100644 --- a/arch/powerpc/kvm/book3s_64_vio_hv.c +++ b/arch/powerpc/kvm/book3s_64_vio_hv.c @@ -221,7 +221,7 @@ static long kvmppc_rm_tce_iommu_mapped_dec(struct kvm *kvm, return H_SUCCESS; } -static long kvmppc_rm_tce_iommu_unmap(struct kvm *kvm, +static long kvmppc_rm_tce_iommu_do_unmap(struct kvm *kvm, struct iommu_table *tbl, unsigned long entry) { enum dma_data_direction dir = DMA_NONE; @@ -245,7 +245,24 @@ static long kvmppc_rm_tce_iommu_unmap(struct kvm *kvm, return ret; } -static long kvmppc_rm_tce_iommu_map(struct kvm *kvm, struct iommu_table *tbl, +static long kvmppc_rm_tce_iommu_unmap(struct kvm *kvm, + struct kvmppc_spapr_tce_table *stt, struct iommu_table *tbl, + unsigned long entry) +{ + unsigned long i, ret = H_SUCCESS; + unsigned long subpages = 1ULL << (stt->page_shift - tbl->it_page_shift); + unsigned long io_entry = entry * subpages; + + for (i = 0; i < subpages; ++i) { + ret = kvmppc_rm_tce_iommu_do_unmap(kvm, tbl, io_entry + i); + if (ret != H_SUCCESS) + break; + } + + return ret; +} + +static long kvmppc_rm_tce_iommu_do_map(struct kvm *kvm, struct iommu_table *tbl, unsigned long entry, unsigned long ua, enum dma_data_direction dir) { @@ -290,6 +307,27 @@ static long kvmppc_rm_tce_iommu_map(struct kvm *kvm, struct iommu_table *tbl, return 0; } +static long kvmppc_rm_tce_iommu_map(struct kvm *kvm, + struct kvmppc_spapr_tce_table *stt, struct iommu_table *tbl, + unsigned long entry, unsigned long ua, + enum dma_data_direction dir) +{ + unsigned long i, pgoff, ret = H_SUCCESS; + unsigned long subpages = 1ULL << (stt->page_shift - tbl->it_page_shift); + unsigned long io_entry = entry * subpages; + + for (i = 0, pgoff = 0; i < subpages; + ++i, pgoff += IOMMU_PAGE_SIZE(tbl)) { + + ret = kvmppc_rm_tce_iommu_do_map(kvm, tbl, + io_entry + i, ua + pgoff, dir); + if (ret != H_SUCCESS) + break; + } + + return ret; +} + long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, unsigned long ioba, unsigned long tce) { @@ -327,10 +365,10 @@ long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { if (dir == DMA_NONE) - ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm, + ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm, stt, stit->tbl, entry); else - ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, + ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt, stit->tbl, entry, ua, dir); if (ret == H_SUCCESS) @@ -477,7 +515,7 @@ long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu, return H_PARAMETER; list_for_each_entry_lockless(stit, &stt->iommu_tables, next) { - ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, + ret = kvmppc_rm_tce_iommu_map(vcpu->kvm, stt, stit->tbl, entry + i, ua, iommu_tce_direction(tce)); @@ -529,7 +567,7 @@ long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu, unsigned long entry = ioba >> stt->page_shift; for (i = 0; i < npages; ++i) { - ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm, + ret = kvmppc_rm_tce_iommu_unmap(vcpu->kvm, stt, stit->tbl, entry + i); if (ret == H_SUCCESS) |