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Per PCI Firmware Specification Revision 3.0, 4.1.2. MCFG Table Description: Memory Mapped Enhanced Configuration Space Base Address Allocation Structure assign the Start Bus Number and the End Bus Number which could decoded by the Host Bridge. We should not access the PCI device which bus number outside of the range of [Start Bus Number, End Bus Number). For ACRN, we should: 1. Don't detect PCI device which bus number outside the range of [Start Bus Number, End Bus Number) of MCFG ACPI Table. 2. Only trap the ECAM MMIO size: [MMCFG_BASE_ADDRESS, MMCFG_BASE_ADDRESS + (End Bus Number - Start Bus Number + 1) * 0x100000) for SOS. Tracked-On: #5233 Signed-off-by: Li Fei1 <fei1.li@intel.com> Acked-by: Eddie Dong <eddie.dong@intel.com> |
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