From 3d85c7c15fc7ce986cf1a8e73da1217228f35685 Mon Sep 17 00:00:00 2001 From: Jiaxun Yang Date: Thu, 23 Feb 2023 16:19:58 +0000 Subject: [PATCH] hw/mips/gt64xxx_pci: Don't endian-swap GT_PCI0_CFGADDR MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 145e2198d749 ("hw/mips/gt64xxx_pci: Endian-swap using PCI_HOST_BRIDGE MemoryRegionOps") converted CFGADDR/CFGDATA registers to use PCI_HOST_BRIDGE's accessor facility and enabled byte swap for both CFGADDR/CFGDATA register. However CFGADDR as a ISD internal register is not controlled by MByteSwap bit, it follows endian of all other ISD register, which means it ties to little endian. Move mapping of CFGADDR out of gt64120_update_pci_cfgdata_mapping to disable endian-swapping. Fixes: 145e2198d749 ("hw/mips/gt64xxx_pci: Endian-swap using PCI_HOST_BRIDGE MemoryRegionOps") Reported-by: Nathan Chancellor Signed-off-by: Jiaxun Yang Tested-by: Philippe Mathieu-Daudé Reviewed-by: Philippe Mathieu-Daudé Tested-by: Nathan Chancellor Message-Id: <20230223161958.48696-1-jiaxun.yang@flygoat.com> [PMD: !!! Note this only fixes little-endian hosts !!! ] Signed-off-by: Philippe Mathieu-Daudé --- hw/pci-host/gt64120.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/hw/pci-host/gt64120.c b/hw/pci-host/gt64120.c index f226d03420..82c15edb46 100644 --- a/hw/pci-host/gt64120.c +++ b/hw/pci-host/gt64120.c @@ -321,9 +321,6 @@ 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 }; @@ -339,15 +336,6 @@ 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); @@ -1208,6 +1196,12 @@ static void gt64120_realize(DeviceState *dev, Error **errp) PCI_DEVFN(18, 0), TYPE_PCI_BUS); pci_create_simple(phb->bus, PCI_DEVFN(0, 0), "gt64120_pci"); + 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); + /* * The whole address space decoded by the GT-64120A doesn't generate