[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] [v3][PATCH 2/5] xen, gfx passthrough: create intel isa brid
From: |
Tiejun Chen |
Subject: |
[Qemu-devel] [v3][PATCH 2/5] xen, gfx passthrough: create intel isa bridge |
Date: |
Mon, 26 May 2014 17:36:32 +0800 |
ISA bridge is needed since Intel gfx drive will probe it instead
of Dev31:Fun0 to make graphics device passthrough work easy for VMM, that
only need to expose ISA bridge to let driver know the real hardware underneath.
The original patch is from Allen Kay address@hidden
Signed-off-by: Yang Zhang <address@hidden>
Signed-off-by: Tiejun Chen <address@hidden>
Cc: Allen Kay <address@hidden>
---
v3:
* Fix some typos.
* Improve some return paths.
v2:
* Nothing is changed.
hw/xen/xen_pt_graphics.c | 63 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/hw/xen/xen_pt_graphics.c b/hw/xen/xen_pt_graphics.c
index e63bd6f..51b174f 100644
--- a/hw/xen/xen_pt_graphics.c
+++ b/hw/xen/xen_pt_graphics.c
@@ -230,3 +230,66 @@ out:
g_free(bios);
return rc;
}
+
+static uint32_t isa_bridge_read_config(PCIDevice *d, uint32_t addr, int len)
+{
+ return pci_default_read_config(d, addr, len);
+}
+
+static void isa_bridge_write_config(PCIDevice *d, uint32_t addr, uint32_t v,
+ int len)
+{
+ pci_default_write_config(d, addr, v, len);
+
+ return;
+}
+
+static void isa_bridge_class_init(ObjectClass *klass, void *data)
+{
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->config_read = isa_bridge_read_config;
+ k->config_write = isa_bridge_write_config;
+
+ return;
+};
+
+typedef struct {
+ PCIDevice dev;
+} ISABridgeState;
+
+static TypeInfo isa_bridge_info = {
+ .name = "intel-pch-isa-bridge",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(ISABridgeState),
+ .class_init = isa_bridge_class_init,
+};
+
+static void xen_pt_graphics_register_types(void)
+{
+ type_register_static(&isa_bridge_info);
+}
+
+type_init(xen_pt_graphics_register_types)
+
+static int create_pch_isa_bridge(PCIBus *bus, XenHostPCIDevice *hdev)
+{
+ struct PCIDevice *dev;
+
+ char rid;
+
+ dev = pci_create(bus, PCI_DEVFN(0x1f, 0), "intel-pch-isa-bridge");
+
+ qdev_init_nofail(&dev->qdev);
+
+ pci_config_set_vendor_id(dev->config, hdev->vendor_id);
+ pci_config_set_device_id(dev->config, hdev->device_id);
+
+ xen_host_pci_get_block(hdev, PCI_REVISION_ID, (uint8_t *)&rid, 1);
+
+ pci_config_set_revision(dev->config, rid);
+ pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_ISA);
+
+ XEN_PT_LOG(dev, "Intel PCH ISA bridge created.\n");
+ return 0;
+}
--
1.9.1
- [Qemu-devel] [v3][PATCH 0/8] xen: add Intel IGD passthrough support, Tiejun Chen, 2014/05/26
- [Qemu-devel] [v3][PATCH 1/5] xen, gfx passthrough: basic graphics passthrough support, Tiejun Chen, 2014/05/26
- [Qemu-devel] [v3][PATCH 2/5] xen, gfx passthrough: create intel isa bridge,
Tiejun Chen <=
- [Qemu-devel] [v3][PATCH 3/5] xen, gfx passthrough: support Intel IGD passthrough with VT-D, Tiejun Chen, 2014/05/26
- [Qemu-devel] [v3][PATCH 4/5] xen, gfx passthrough: create host bridge to passthrough, Tiejun Chen, 2014/05/26
- [Qemu-devel] [v3][PATCH 5/5] xen, gfx passthrough: add opregion mapping, Tiejun Chen, 2014/05/26
- Re: [Qemu-devel] [v3][PATCH 0/8] xen: add Intel IGD passthrough support, Chen, Tiejun, 2014/05/26