Merge remote-tracking branch 'origin/master' into staging

* origin/master: (75 commits)
  tcg: Don't make exitreq flag a local temporary
  Makefile: Add subdir dependency on config-devices-all.mak
  make_device_config.sh: Emit dependency file to directory where included
  Revert "make_device_config.sh: Fix target path in generated dependency file"
  s390/virtio-ccw: remove redundant call to blockdev_mark_auto_del
  s390/css: Fix subchannel detection
  Allow virtio-net features for legacy s390 virtio bus
  s390: virtio-ccw maintainer
  s390: simplify kvm cpu init
  pseries: Add compatible property to root of device tree
  target-ppc: Move CPU aliases out of translate_init.c
  target-ppc: Report CPU aliases for QMP
  target-ppc: List alias names alongside CPU models
  target-ppc: Make host CPU a subclass of the host's CPU model
  PPC: xnu kernel expects FLUSH to be cleared on STOP
  PPC: Fix dma interrupt
  target-ppc: Fix PPC_DUMP_SPR_ACCESS build
  target-ppc: Synchronize FPU state with KVM
  target-ppc: Add mechanism for synchronizing SPRs with KVM
  Save memory allocation in the elf loader
  ...

1 files changed, 31 insertions, 0 deletions

diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 7b8959488e..77c052fcb1 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -323,6 +323,36 @@ static target_ulong h_protect(PowerPCCPU *cpu, sPAPREnvironment *spapr,
     return H_SUCCESS;
 }
 
+static target_ulong h_read(PowerPCCPU *cpu, sPAPREnvironment *spapr,
+                           target_ulong opcode, target_ulong *args)
+{
+    CPUPPCState *env = &cpu->env;
+    target_ulong flags = args[0];
+    target_ulong pte_index = args[1];
+    uint8_t *hpte;
+    int i, ridx, n_entries = 1;
+
+    if ((pte_index * HASH_PTE_SIZE_64) & ~env->htab_mask) {
+        return H_PARAMETER;
+    }
+
+    if (flags & H_READ_4) {
+        /* Clear the two low order bits */
+        pte_index &= ~(3ULL);
+        n_entries = 4;
+    }
+
+    hpte = env->external_htab + (pte_index * HASH_PTE_SIZE_64);
+
+    for (i = 0, ridx = 0; i < n_entries; i++) {
+        args[ridx++] = ldq_p(hpte);
+        args[ridx++] = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
+        hpte += HASH_PTE_SIZE_64;
+    }
+
+    return H_SUCCESS;
+}
+
 static target_ulong h_set_dabr(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                target_ulong opcode, target_ulong *args)
 {
@@ -710,6 +740,7 @@ static void hypercall_register_types(void)
     spapr_register_hypercall(H_ENTER, h_enter);
     spapr_register_hypercall(H_REMOVE, h_remove);
     spapr_register_hypercall(H_PROTECT, h_protect);
+    spapr_register_hypercall(H_READ, h_read);
 
     /* hcall-bulk */
     spapr_register_hypercall(H_BULK_REMOVE, h_bulk_remove);