Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-3.1-20180821' into staging

ppc patch queue 2018-08-21

Here's my first ppc & spapr pull request for qemu-3.1.  This contains
a bunch of things that have accumulated while 3.0 was in freeze.
Highlights are:
    * SLOF firmware update
    * A number of floating point cleanups from Richard Henderson and
      Yasmin Beatriz
    * A new model for assigning irq numbers on spapr, this is an
      important preliminary step towards implementing the POWER9
      "XIVE" interrupt controller

# gpg: Signature made Tue 21 Aug 2018 05:32:44 BST
# gpg:                using RSA key 6C38CACA20D9B392
# 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-3.1-20180821: (26 commits)
  ppc: add DBCR based debugging
  spapr_pci: factorize the use of SPAPR_MACHINE_GET_CLASS()
  mac_newworld: don't use legacy fw_cfg_init_mem() function
  mac_oldworld: don't use legacy fw_cfg_init_mem() function
  40p: don't use legacy fw_cfg_init_mem() function
  qemu-doc: mark ppc/prep machine as deprecated
  hw/ppc: deprecate the machine type 'prep', replaced by '40p'
  spapr: introduce a IRQ controller backend to the machine
  hw/ppc/ppc405_uc: Convert away from old_mmio
  hw/ppc/ppc_boards: Don't use old_mmio for ref405ep_fpga
  hw/ppc/prep: Remove ifdeffed-out stub of XCSR code
  spapr: introduce a fixed IRQ number space
  spapr: Add a pseries-3.1 machine type
  target/ppc: simplify bcdadd/sub functions
  xics: don't include "target/ppc/cpu-qom.h" in "hw/ppc/xics.h"
  vfio/spapr: Allow backing bigger guest IOMMU pages with smaller physical pages
  target/ppc: bcdsub fix sign when result is zero
  target/ppc: Use non-arithmetic conversions for fp load/store
  target/ppc: Honor fpscr_ze semantics and tidy fre, fresqrt
  target/ppc: Tidy helper_fsqrt
  ...

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

1 files changed, 24 insertions, 8 deletions

diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 497b896c7d..5cd676e443 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -267,6 +267,7 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                                 target_ulong args, uint32_t nret,
                                 target_ulong rets)
 {
+    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
     uint32_t config_addr = rtas_ld(args, 0);
     uint64_t buid = rtas_ldq(args, 1);
     unsigned int func = rtas_ld(args, 3);
@@ -334,6 +335,9 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
             return;
         }
 
+        if (!smc->legacy_irq_allocation) {
+            spapr_irq_msi_free(spapr, msi->first_irq, msi->num);
+        }
         spapr_irq_free(spapr, msi->first_irq, msi->num);
         if (msi_present(pdev)) {
             spapr_msi_setmsg(pdev, 0, false, 0, 0);
@@ -372,7 +376,13 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     }
 
     /* Allocate MSIs */
-    irq = spapr_irq_find(spapr, req_num, ret_intr_type == RTAS_TYPE_MSI, &err);
+    if (smc->legacy_irq_allocation) {
+        irq = spapr_irq_find(spapr, req_num, ret_intr_type == RTAS_TYPE_MSI,
+                             &err);
+    } else {
+        irq = spapr_irq_msi_alloc(spapr, req_num,
+                                  ret_intr_type == RTAS_TYPE_MSI, &err);
+    }
     if (err) {
         error_reportf_err(err, "Can't allocate MSIs for device %x: ",
                           config_addr);
@@ -392,6 +402,9 @@ static void rtas_ibm_change_msi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 
     /* Release previous MSIs */
     if (msi) {
+        if (!smc->legacy_irq_allocation) {
+            spapr_irq_msi_free(spapr, msi->first_irq, msi->num);
+        }
         spapr_irq_free(spapr, msi->first_irq, msi->num);
         g_hash_table_remove(phb->msi, &config_addr);
     }
@@ -1546,6 +1559,7 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
     sPAPRMachineState *spapr =
         (sPAPRMachineState *) object_dynamic_cast(qdev_get_machine(),
                                                   TYPE_SPAPR_MACHINE);
+    sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
     SysBusDevice *s = SYS_BUS_DEVICE(dev);
     sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
     PCIHostState *phb = PCI_HOST_BRIDGE(s);
@@ -1563,7 +1577,6 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
     }
 
     if (sphb->index != (uint32_t)-1) {
-        sPAPRMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
         Error *local_err = NULL;
 
         smc->phb_placement(spapr, sphb->index,
@@ -1705,14 +1718,16 @@ static void spapr_phb_realize(DeviceState *dev, Error **errp)
 
     /* Initialize the LSI table */
     for (i = 0; i < PCI_NUM_PINS; i++) {
-        uint32_t irq;
+        uint32_t irq = SPAPR_IRQ_PCI_LSI + sphb->index * PCI_NUM_PINS + i;
         Error *local_err = NULL;
 
-        irq = spapr_irq_findone(spapr, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
-            error_prepend(errp, "can't allocate LSIs: ");
-            return;
+        if (smc->legacy_irq_allocation) {
+            irq = spapr_irq_findone(spapr, &local_err);
+            if (local_err) {
+                error_propagate(errp, local_err);
+                error_prepend(errp, "can't allocate LSIs: ");
+                return;
+            }
         }
 
         spapr_irq_claim(spapr, irq, true, &local_err);
@@ -2123,6 +2138,7 @@ int spapr_populate_pci_dt(sPAPRPHBState *phb,
     _FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof_ranges));
     _FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
     _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
+    /* TODO: fine tune the total count of allocatable MSIs per PHB */
     _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pe-total-#msi", XICS_IRQS_SPAPR));
 
     /* Dynamic DMA window */