i386/pc: create pci-host qdev prior to pc_memory_init()

At the start of pc_memory_init() we usually pass a range of
0..UINT64_MAX as pci_memory, when really its 2G (i440fx) or
32G (q35). To get the real user value, we need to get pci-host
passed property for default pci_hole64_size. Thus to get that,
create the qdev prior to memory init to better make estimations
on max used/phys addr.

This is in preparation to determine that host-phys-bits are
enough and also for pci-hole64-size to be considered to relocate
ram-above-4g to be at 1T (on AMD platforms).

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20220719170014.27028-3-joao.m.martins@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 2 insertions, 3 deletions

diff --git a/hw/pci-host/i440fx.c b/hw/pci-host/i440fx.c
index 1c5ad5f918..d5426ef4a5 100644
--- a/hw/pci-host/i440fx.c
+++ b/hw/pci-host/i440fx.c
@@ -237,7 +237,8 @@ static void i440fx_realize(PCIDevice *dev, Error **errp)
     }
 }
 
-PCIBus *i440fx_init(const char *host_type, const char *pci_type,
+PCIBus *i440fx_init(const char *pci_type,
+                    DeviceState *dev,
                     MemoryRegion *address_space_mem,
                     MemoryRegion *address_space_io,
                     ram_addr_t ram_size,
@@ -246,7 +247,6 @@ PCIBus *i440fx_init(const char *host_type, const char *pci_type,
                     MemoryRegion *pci_address_space,
                     MemoryRegion *ram_memory)
 {
-    DeviceState *dev;
     PCIBus *b;
     PCIDevice *d;
     PCIHostState *s;
@@ -254,7 +254,6 @@ PCIBus *i440fx_init(const char *host_type, const char *pci_type,
     unsigned i;
     I440FXState *i440fx;
 
-    dev = qdev_new(host_type);
     s = PCI_HOST_BRIDGE(dev);
     b = pci_root_bus_new(dev, NULL, pci_address_space,
                          address_space_io, 0, TYPE_PCI_BUS);