The MByteSwap bit only affects the data register endianness, not the config register. Map the config register once in the gt64120_realize() handler, and only remap the data register when the mapping is updated.
Fixes: 145e2198d7 ("gt64xxx: Endian-swap using PCI_HOST_BRIDGE MemoryRegionOps") Reported-by: Klaus Jensen <i...@irrelevant.dk> Signed-off-by: Philippe Mathieu-Daudé <phi...@linaro.org> --- hw/pci-host/gt64120.c | 25 +++++++------------------ 1 file changed, 7 insertions(+), 18 deletions(-) diff --git a/hw/pci-host/gt64120.c b/hw/pci-host/gt64120.c index f226d03420..a88b59f576 100644 --- a/hw/pci-host/gt64120.c +++ b/hw/pci-host/gt64120.c @@ -320,13 +320,6 @@ static void gt64120_isd_mapping(GT64120State *s) static void gt64120_update_pci_cfgdata_mapping(GT64120State *s) { - /* Indexed on MByteSwap bit, see Table 158: PCI_0 Command, Offset: 0xc00 */ - static const MemoryRegionOps *pci_host_conf_ops[] = { - &pci_host_conf_be_ops, &pci_host_conf_le_ops - }; - static const MemoryRegionOps *pci_host_data_ops[] = { - &pci_host_data_be_ops, &pci_host_data_le_ops - }; PCIHostState *phb = PCI_HOST_BRIDGE(s); memory_region_transaction_begin(); @@ -339,22 +332,13 @@ static void gt64120_update_pci_cfgdata_mapping(GT64120State *s) * - Table 16: 32-bit PCI Transaction Endianess * - Table 158: PCI_0 Command, Offset: 0xc00 */ - if (memory_region_is_mapped(&phb->conf_mem)) { - memory_region_del_subregion(&s->ISD_mem, &phb->conf_mem); - object_unparent(OBJECT(&phb->conf_mem)); - } - memory_region_init_io(&phb->conf_mem, OBJECT(phb), - pci_host_conf_ops[s->regs[GT_PCI0_CMD] & 1], - s, "pci-conf-idx", 4); - memory_region_add_subregion_overlap(&s->ISD_mem, GT_PCI0_CFGADDR << 2, - &phb->conf_mem, 1); - if (memory_region_is_mapped(&phb->data_mem)) { memory_region_del_subregion(&s->ISD_mem, &phb->data_mem); object_unparent(OBJECT(&phb->data_mem)); } memory_region_init_io(&phb->data_mem, OBJECT(phb), - pci_host_data_ops[s->regs[GT_PCI0_CMD] & 1], + s->regs[GT_PCI0_CMD] & 1 ? &pci_host_data_le_ops + : &pci_host_data_be_ops, s, "pci-conf-data", 4); memory_region_add_subregion_overlap(&s->ISD_mem, GT_PCI0_CFGDATA << 2, &phb->data_mem, 1); @@ -1207,6 +1191,11 @@ static void gt64120_realize(DeviceState *dev, Error **errp) get_system_io(), PCI_DEVFN(18, 0), TYPE_PCI_BUS); + memory_region_init_io(&phb->conf_mem, OBJECT(phb), &pci_host_conf_le_ops, + s, "pci-conf-idx", 4); + memory_region_add_subregion_overlap(&s->ISD_mem, GT_PCI0_CFGADDR << 2, + &phb->conf_mem, 1); + pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "gt64120_pci"); /* -- 2.38.1