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[Qemu-devel] [PATCH 1/4] hw/pci-host/bonito.c: Add PCI mem region mapped

From: BALATON Zoltan
Subject: [Qemu-devel] [PATCH 1/4] hw/pci-host/bonito.c: Add PCI mem region mapped at the correct address
Date: Mon, 11 Feb 2019 05:01:56 +0100

Stop using system memory as PCI memory otherwise devices such as VGA
that have regions mapped to PCI memory clash with RAM. Use a separate
memory region for PCI memory and map it to the correct address in
system memory which allows PCI mem regions to show at the correct
address where clients expect them.

Signed-off-by: BALATON Zoltan <address@hidden>
 hw/pci-host/bonito.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/hw/pci-host/bonito.c b/hw/pci-host/bonito.c
index 9f33582706..c940ec6e48 100644
--- a/hw/pci-host/bonito.c
+++ b/hw/pci-host/bonito.c
@@ -598,11 +598,14 @@ static const VMStateDescription vmstate_bonito = {
 static void bonito_pcihost_realize(DeviceState *dev, Error **errp)
     PCIHostState *phb = PCI_HOST_BRIDGE(dev);
+    MemoryRegion *mr = g_new0(MemoryRegion, 1);
+    memory_region_init(mr, OBJECT(dev), "pci.mem", BONITO_PCILO_SIZE);
     phb->bus = pci_register_root_bus(DEVICE(dev), "pci",
                                      pci_bonito_set_irq, pci_bonito_map_irq,
-                                     dev, get_system_memory(), get_system_io(),
+                                     dev, mr, get_system_io(),
                                      0x28, 32, TYPE_PCI_BUS);
+    memory_region_add_subregion(get_system_memory(), BONITO_PCILO_BASE, mr);
 static void bonito_realize(PCIDevice *dev, Error **errp)

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