Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.11-20171127' into staging

ppc patch queue 2017-11-27

This series contains a couple of migration fixes for hash guests on
POWER9 radix MMU hosts.

# gpg: Signature made Mon 27 Nov 2017 04:27:15 GMT
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.11-20171127:
  target/ppc: Fix setting of cpu->compat_pvr on incoming migration
  target/ppc: Move setting of patb_entry on hash table init
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/ppc/spapr.c

@@ -1373,6 +1373,8 @@ void spapr_reallocate_hpt(sPAPRMachineState *spapr, int shift,
             DIRTY_HPTE(HPTE(spapr->htab, i));
         }
     }
+    /* We're setting up a hash table, so that means we're not radix */
+    spapr->patb_entry = 0;
 }
 
 void spapr_setup_hpt_and_vrma(sPAPRMachineState *spapr)
@@ -1392,8 +1394,6 @@ void spapr_setup_hpt_and_vrma(sPAPRMachineState *spapr)
         spapr->rma_size = kvmppc_rma_size(spapr_node0_size(MACHINE(spapr)),
                                           spapr->htab_shift);
     }
-    /* We're setting up a hash table, so that means we're not radix */
-    spapr->patb_entry = 0;
 }
 
 static void find_unknown_sysbus_device(SysBusDevice *sbdev, void *opaque)

target/ppc/machine.c

@@ -237,9 +237,11 @@ static int cpu_post_load(void *opaque, int version_id)
 
 #if defined(TARGET_PPC64)
     if (cpu->compat_pvr) {
+        uint32_t compat_pvr = cpu->compat_pvr;
         Error *local_err = NULL;
 
-        ppc_set_compat(cpu, cpu->compat_pvr, &local_err);
+        cpu->compat_pvr = 0;
+        ppc_set_compat(cpu, compat_pvr, &local_err);
         if (local_err) {
             error_report_err(local_err);
             return -1;