Liu,Junming 2c5c8754de hv:enable GVT-d for pre-launched linux guest in logical partion mode ... When pass-thru GPU to pre-launched Linux guest, need to pass GPU OpRegion to the guest. Here's the detailed steps: 1. reserve a memory region in ve820 table for GPU OpRegion 2. build EPT mapping for GPU OpRegion to pass-thru OpRegion to guest 3. emulate the pci config register for OpRegion For the third step, here's detailed description: The address of OpRegion locates on PCI config space offset 0xFC, Normal Linux guest won't write this register, so we can regard this register as read-only. When guest reads this register, return the emulated value. When guest writes this register, ignore the operation. Tracked-On: #6387 Signed-off-by: Liu,Junming <junming.liu@intel.com>		2021-08-19 11:56:26 +08:00
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x86	hv:enable GVT-d for pre-launched linux guest in logical partion mode	2021-08-19 11:56:26 +08:00