diff options
Diffstat (limited to 'target-ppc/kvm.c')
| -rw-r--r-- | target-ppc/kvm.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index 759983dbae..a1fa8d3ddf 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -1446,11 +1446,35 @@ off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem) uint64_t kvmppc_rma_size(uint64_t current_size, unsigned int hash_shift) { + struct kvm_ppc_smmu_info info; + long rampagesize, best_page_shift; + int i; + if (cap_ppc_rma >= 2) { return current_size; } + + /* Find the largest hardware supported page size that's less than + * or equal to the (logical) backing page size of guest RAM */ + kvm_get_smmu_info(ppc_env_get_cpu(first_cpu), &info); + rampagesize = getrampagesize(); + best_page_shift = 0; + + for (i = 0; i < KVM_PPC_PAGE_SIZES_MAX_SZ; i++) { + struct kvm_ppc_one_seg_page_size *sps = &info.sps[i]; + + if (!sps->page_shift) { + continue; + } + + if ((sps->page_shift > best_page_shift) + && ((1UL << sps->page_shift) <= rampagesize)) { + best_page_shift = sps->page_shift; + } + } + return MIN(current_size, - getrampagesize() << (hash_shift - 7)); + 1ULL << (best_page_shift + hash_shift - 7)); } #endif |