hw/pci-host/i440fx: Extract the IGD passthrough host bridge device

We can use a i440FX without the IGD passthrough host bridge.
Extract it into a new file, 'hw/pci-host/xen_igd_pt.c'.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191209095002.32194-6-philmd@redhat.com>
Acked-by: Paul Durrant <paul@xen.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 0 insertions, 84 deletions

diff --git a/hw/pci-host/i440fx.c b/hw/pci-host/i440fx.c
index 4141385..bae7b42 100644
--- a/hw/pci-host/i440fx.c
+++ b/hw/pci-host/i440fx.c
@@ -368,89 +368,6 @@ static const TypeInfo i440fx_info = {
     },
 };
 
-/* IGD Passthrough Host Bridge. */
-typedef struct {
-    uint8_t offset;
-    uint8_t len;
-} IGDHostInfo;
-
-/* Here we just expose minimal host bridge offset subset. */
-static const IGDHostInfo igd_host_bridge_infos[] = {
-    {PCI_REVISION_ID,         2},
-    {PCI_SUBSYSTEM_VENDOR_ID, 2},
-    {PCI_SUBSYSTEM_ID,        2},
-    {0x50,                    2}, /* SNB: processor graphics control register */
-    {0x52,                    2}, /* processor graphics control register */
-    {0xa4,                    4}, /* SNB: graphics base of stolen memory */
-    {0xa8,                    4}, /* SNB: base of GTT stolen memory */
-};
-
-static void host_pci_config_read(int pos, int len, uint32_t *val, Error **errp)
-{
-    int rc, config_fd;
-    /* Access real host bridge. */
-    char *path = g_strdup_printf("/sys/bus/pci/devices/%04x:%02x:%02x.%d/%s",
-                                 0, 0, 0, 0, "config");
-
-    config_fd = open(path, O_RDWR);
-    if (config_fd < 0) {
-        error_setg_errno(errp, errno, "Failed to open: %s", path);
-        goto out;
-    }
-
-    if (lseek(config_fd, pos, SEEK_SET) != pos) {
-        error_setg_errno(errp, errno, "Failed to seek: %s", path);
-        goto out_close_fd;
-    }
-
-    do {
-        rc = read(config_fd, (uint8_t *)val, len);
-    } while (rc < 0 && (errno == EINTR || errno == EAGAIN));
-    if (rc != len) {
-        error_setg_errno(errp, errno, "Failed to read: %s", path);
-    }
-
-out_close_fd:
-    close(config_fd);
-out:
-    g_free(path);
-}
-
-static void igd_pt_i440fx_realize(PCIDevice *pci_dev, Error **errp)
-{
-    uint32_t val = 0;
-    size_t i;
-    int pos, len;
-    Error *local_err = NULL;
-
-    for (i = 0; i < ARRAY_SIZE(igd_host_bridge_infos); i++) {
-        pos = igd_host_bridge_infos[i].offset;
-        len = igd_host_bridge_infos[i].len;
-        host_pci_config_read(pos, len, &val, &local_err);
-        if (local_err) {
-            error_propagate(errp, local_err);
-            return;
-        }
-        pci_default_write_config(pci_dev, pos, val, len);
-    }
-}
-
-static void igd_passthrough_i440fx_class_init(ObjectClass *klass, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(klass);
-    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
-
-    k->realize = igd_pt_i440fx_realize;
-    dc->desc = "IGD Passthrough Host bridge";
-}
-
-static const TypeInfo igd_passthrough_i440fx_info = {
-    .name          = TYPE_IGD_PASSTHROUGH_I440FX_PCI_DEVICE,
-    .parent        = TYPE_I440FX_PCI_DEVICE,
-    .instance_size = sizeof(PCII440FXState),
-    .class_init    = igd_passthrough_i440fx_class_init,
-};
-
 static const char *i440fx_pcihost_root_bus_path(PCIHostState *host_bridge,
                                                 PCIBus *rootbus)
 {
@@ -495,7 +412,6 @@ static const TypeInfo i440fx_pcihost_info = {
 static void i440fx_register_types(void)
 {
     type_register_static(&i440fx_info);
-    type_register_static(&igd_passthrough_i440fx_info);
     type_register_static(&i440fx_pcihost_info);
 }