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dm: passthrough opregion to uos gpu

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This commit is contained in:
Zhipeng Gong
2018-10-18 09:23:09 +08:00
committed by Zhao Yakui
parent 3a0f83ed73
commit e5b21a2e90
3 changed files with 24 additions and 0 deletions
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15
devicemodel/hw/pci/passthrough.c
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@@ -89,6 +89,8 @@ struct mmio_map {
size_t size;
};
uint32_t opregion_start = 0;
struct passthru_dev {
struct pci_vdev *dev;
struct pcibar bar[PCI_BARMAX + 1];
@@ -848,6 +850,12 @@ passthru_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
if (error < 0)
goto done;
if (ptdev->phys_bdf == PCI_BDF_GPU) {
opregion_start = read_config(ptdev->phys_dev, PCIR_ASLS_CTL, 4);
printf("Opregion start=%x\n", opregion_start);
opregion_start = ALIGN_DOWN(opregion_start, 4096);
}
/* If ptdev support MSI/MSIX, stop here to skip virtual INTx setup.
* Forge Guest to use MSI/MSIX in this case to mitigate IRQ sharing
* issue
@@ -1000,6 +1008,13 @@ passthru_cfgread(struct vmctx *ctx, int vcpu, struct pci_vdev *dev,
*rv &= ~PCIM_GMCH_CTL_GMS;
}
if ((PCI_BDF(dev->bus, dev->slot, dev->func) == PCI_BDF_GPU)
&& (coff == PCIR_ASLS_CTL)) {
printf("passthrough opregion = %x\n", ptdev->phys_bdf);
vm_unmap_ptdev_mmio(ctx, 0, 2, 0, opregion_start, OPREGION_SIZE, opregion_start);
vm_map_ptdev_mmio(ctx, 0, 2, 0, opregion_start, OPREGION_SIZE, opregion_start);
}
return 0;
}