diff options
Diffstat (limited to 'hw/pci')
| -rw-r--r-- | hw/pci/pci.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/hw/pci/pci.c b/hw/pci/pci.c index a017614d48..9f57aeaeba 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -38,6 +38,7 @@ #include "hw/pci/msix.h" #include "exec/address-spaces.h" #include "hw/hotplug.h" +#include "hw/boards.h" //#define DEBUG_PCI #ifdef DEBUG_PCI @@ -1065,6 +1066,10 @@ static pcibus_t pci_bar_address(PCIDevice *d, pcibus_t new_addr, last_addr; int bar = pci_bar(d, reg); uint16_t cmd = pci_get_word(d->config + PCI_COMMAND); + Object *machine = qdev_get_machine(); + ObjectClass *oc = object_get_class(machine); + MachineClass *mc = MACHINE_CLASS(oc); + bool allow_0_address = mc->pci_allow_0_address; if (type & PCI_BASE_ADDRESS_SPACE_IO) { if (!(cmd & PCI_COMMAND_IO)) { @@ -1075,7 +1080,8 @@ static pcibus_t pci_bar_address(PCIDevice *d, /* Check if 32 bit BAR wraps around explicitly. * TODO: make priorities correct and remove this work around. */ - if (last_addr <= new_addr || new_addr == 0 || last_addr >= UINT32_MAX) { + if (last_addr <= new_addr || last_addr >= UINT32_MAX || + (!allow_0_address && new_addr == 0)) { return PCI_BAR_UNMAPPED; } return new_addr; @@ -1099,8 +1105,8 @@ static pcibus_t pci_bar_address(PCIDevice *d, /* XXX: as we cannot support really dynamic mappings, we handle specific values as invalid mappings. */ - if (last_addr <= new_addr || new_addr == 0 || - last_addr == PCI_BAR_UNMAPPED) { + if (last_addr <= new_addr || last_addr == PCI_BAR_UNMAPPED || + (!allow_0_address && new_addr == 0)) { return PCI_BAR_UNMAPPED; } |