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nv2a: Set PCI class id and subsystem id to match hardware 

This patch sets the class id, subsystem id, and subsystem vendor id
in the PCI device header to match what the NV2A hardware advertises.

This resolves an issue with PCI device enumeration failing to detect and load
the driver for the NV2A device in some operating systems, namely ReactOS
version 0.2.5-xbox (custom build), which depend on these fields being
programmed correctly.
This commit is contained in:
Stas'M 2019-08-28 20:19:51 +03:00 committed by mborgerson
parent 4cf920d594
commit dd1248a563
1 changed files with 10 additions and 2 deletions
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12
hw/xbox/nv2a/nv2a.c
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@ -410,6 +410,9 @@ static void nv2a_realize(PCIDevice *dev, Error **errp)
d = NV2A_DEVICE(dev);
/* setting subsystem ids again, see comment in nv2a_class_init() */
pci_set_word(dev->config + PCI_SUBSYSTEM_VENDOR_ID, 0);
pci_set_word(dev->config + PCI_SUBSYSTEM_ID, 0);
dev->config[PCI_INTERRUPT_PIN] = 0x01;
d->pcrtc.start = 0;
@ -478,8 +481,13 @@ static void nv2a_class_init(ObjectClass *klass, void *data)
k->vendor_id = PCI_VENDOR_ID_NVIDIA;
k->device_id = PCI_DEVICE_ID_NVIDIA_GEFORCE_NV2A;
k->revision = 161;
k->class_id = PCI_CLASS_DISPLAY_3D;
k->revision = 0xA1;
k->class_id = PCI_CLASS_DISPLAY_VGA;
/* When both subsystem ids are set to 0, QEMU sets them to its own
* default values. However we set them anyway in case upstream decides
* to change this behavior. */
k->subsystem_vendor_id = 0;
k->subsystem_id = 0;
k->realize = nv2a_realize;
k->exit = nv2a_exitfn;