+ memset(info, 0, sizeof(*info));
+
+ /* We don't have the new KVM_PPC_GET_SMMU_INFO ioctl, so
+ * need to "guess" what the supported page sizes are.
+ *
+ * For that to work we make a few assumptions:
+ *
+ * - If KVM_CAP_PPC_GET_PVINFO is supported we are running "PR"
+ * KVM which only supports 4K and 16M pages, but supports them
+ * regardless of the backing store characteritics. We also don't
+ * support 1T segments.
+ *
+ * This is safe as if HV KVM ever supports that capability or PR
+ * KVM grows supports for more page/segment sizes, those versions
+ * will have implemented KVM_CAP_PPC_GET_SMMU_INFO and thus we
+ * will not hit this fallback
+ *
+ * - Else we are running HV KVM. This means we only support page
+ * sizes that fit in the backing store. Additionally we only
+ * advertize 64K pages if the processor is ARCH 2.06 and we assume
+ * P7 encodings for the SLB and hash table. Here too, we assume
+ * support for any newer processor will mean a kernel that
+ * implements KVM_CAP_PPC_GET_SMMU_INFO and thus doesn't hit
+ * this fallback.
+ */
+ if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_PVINFO)) {
+ /* No flags */
+ info->flags = 0;
+ info->slb_size = 64;
+
+ /* Standard 4k base page size segment */
+ info->sps[0].page_shift = 12;
+ info->sps[0].slb_enc = 0;
+ info->sps[0].enc[0].page_shift = 12;
+ info->sps[0].enc[0].pte_enc = 0;
+
+ /* Standard 16M large page size segment */
+ info->sps[1].page_shift = 24;
+ info->sps[1].slb_enc = SLB_VSID_L;
+ info->sps[1].enc[0].page_shift = 24;
+ info->sps[1].enc[0].pte_enc = 0;
+ } else {
+ int i = 0;
+
+ /* HV KVM has backing store size restrictions */
+ info->flags = KVM_PPC_PAGE_SIZES_REAL;
+
+ if (env->mmu_model & POWERPC_MMU_1TSEG) {
+ info->flags |= KVM_PPC_1T_SEGMENTS;
+ }
+
+ if (env->mmu_model == POWERPC_MMU_2_06) {
+ info->slb_size = 32;
+ } else {
+ info->slb_size = 64;
+ }
+
+ /* Standard 4k base page size segment */
+ info->sps[i].page_shift = 12;
+ info->sps[i].slb_enc = 0;
+ info->sps[i].enc[0].page_shift = 12;
+ info->sps[i].enc[0].pte_enc = 0;
+ i++;
+
+ /* 64K on MMU 2.06 */
+ if (env->mmu_model == POWERPC_MMU_2_06) {
+ info->sps[i].page_shift = 16;
+ info->sps[i].slb_enc = 0x110;
+ info->sps[i].enc[0].page_shift = 16;
+ info->sps[i].enc[0].pte_enc = 1;
+ i++;
+ }
+
+ /* Standard 16M large page size segment */
+ info->sps[i].page_shift = 24;
+ info->sps[i].slb_enc = SLB_VSID_L;
+ info->sps[i].enc[0].page_shift = 24;
+ info->sps[i].enc[0].pte_enc = 0;
+ }
+}
+
+static void kvm_get_smmu_info(CPUPPCState *env, struct kvm_ppc_smmu_info *info)
+{
+ int ret;
+
+ if (kvm_check_extension(env->kvm_state, KVM_CAP_PPC_GET_SMMU_INFO)) {
+ ret = kvm_vm_ioctl(env->kvm_state, KVM_PPC_GET_SMMU_INFO, info);
+ if (ret == 0) {
+ return;
+ }
+ }
+
+ kvm_get_fallback_smmu_info(env, info);
+}
+
+static long getrampagesize(void)
+{
+ struct statfs fs;