Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.7-20160607' into staging

ppc patch queue for 2016-05-31

Latest patch queue for ppc.  Several significant things in here:
  * A bunch of patches from BenH fixing things in TCG
     - This should fix several regressions introduced by recent
       patches for better HV mode support
     - It also fixes some other bugs discovered along the way
  * Some fixes and cleanups for Mac machine types from Marc
    Cave-Ayland
  * Preliminary patches towards dynamic DMA window support from Alexey
    Kardashevskiy
      - This includes a patch to migration code code
  * Increase number of hotpluggable memory slots
      - Includes a change to KVM generic code, ACKed by Paolo
  * Another TCG fix for an SPE instruction

# gpg: Signature made Tue 07 Jun 2016 11:46:57 BST
# 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: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.7-20160607: (26 commits)
  ppc: Do not take exceptions on unknown SPRs in privileged mode
  ppc: Add missing slbfee. instruction on ppc64 BookS processors
  ppc: Fix slbia decode
  ppc: Fix mtmsr decoding
  ppc: POWER7 has lq/stq instructions and stq need to check ISA
  ppc: POWER7 had ACOP and PID registers
  ppc: Batch TLB flushes on 32-bit 6xx/7xx/7xxx in hash mode
  ppc: Fix tlb invalidations on 6xx/7xx/7xxx 32-bit processors
  ppc: Properly tag the translation cache based on MMU mode
  dbdma: use DMA memory interface for memory accesses
  macio: use DMA memory interface for non-block ATAPI transfers
  target-ppc: fixup bitrot in mmu_helper.c debug statements
  spapr_pci: Drop cannot_instantiate_with_device_add_yet=false
  ppc: fix hrfid, tlbia and slbia privilege
  ppc: Fix hreg_store_msr() so that non-HV mode cannot alter MSR:HV
  ppc: Better figure out if processor has HV mode
  spapr: Introduce pseries-2.7 machine type
  spapr: Increase hotpluggable memory slots to 256
  spapr_pci: Add and export DMA resetting helper
  spapr_pci: Reset DMA config on PHB reset
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 32 insertions, 4 deletions

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 44e401a..0636642 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1816,11 +1816,21 @@ static void ppc_spapr_init(MachineState *machine)
     /* initialize hotplug memory address space */
     if (machine->ram_size < machine->maxram_size) {
         ram_addr_t hotplug_mem_size = machine->maxram_size - machine->ram_size;
+        /*
+         * Limit the number of hotpluggable memory slots to half the number
+         * slots that KVM supports, leaving the other half for PCI and other
+         * devices. However ensure that number of slots doesn't drop below 32.
+         */
+        int max_memslots = kvm_enabled() ? kvm_get_max_memslots() / 2 :
+                           SPAPR_MAX_RAM_SLOTS;
 
-        if (machine->ram_slots > SPAPR_MAX_RAM_SLOTS) {
+        if (max_memslots < SPAPR_MAX_RAM_SLOTS) {
+            max_memslots = SPAPR_MAX_RAM_SLOTS;
+        }
+        if (machine->ram_slots > max_memslots) {
             error_report("Specified number of memory slots %"
                          PRIu64" exceeds max supported %d",
-                         machine->ram_slots, SPAPR_MAX_RAM_SLOTS);
+                         machine->ram_slots, max_memslots);
             exit(1);
         }
 
@@ -2344,18 +2354,36 @@ static const TypeInfo spapr_machine_info = {
     type_init(spapr_machine_register_##suffix)
 
 /*
+ * pseries-2.7
+ */
+static void spapr_machine_2_7_instance_options(MachineState *machine)
+{
+}
+
+static void spapr_machine_2_7_class_options(MachineClass *mc)
+{
+    /* Defaults for the latest behaviour inherited from the base class */
+}
+
+DEFINE_SPAPR_MACHINE(2_7, "2.7", true);
+
+/*
  * pseries-2.6
  */
+#define SPAPR_COMPAT_2_6 \
+    HW_COMPAT_2_6
+
 static void spapr_machine_2_6_instance_options(MachineState *machine)
 {
 }
 
 static void spapr_machine_2_6_class_options(MachineClass *mc)
 {
-    /* Defaults for the latest behaviour inherited from the base class */
+    spapr_machine_2_7_class_options(mc);
+    SET_MACHINE_COMPAT(mc, SPAPR_COMPAT_2_6);
 }
 
-DEFINE_SPAPR_MACHINE(2_6, "2.6", true);
+DEFINE_SPAPR_MACHINE(2_6, "2.6", false);
 
 /*
  * pseries-2.5