root / docs / specs / acpi_pci_hotplug.txt @ 2542bfd5
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| 1 | 9c046d96 | Marcelo Tosatti | QEMU<->ACPI BIOS PCI hotplug interface |
|---|---|---|---|
| 2 | 9c046d96 | Marcelo Tosatti | -------------------------------------- |
| 3 | 9c046d96 | Marcelo Tosatti | |
| 4 | 9c046d96 | Marcelo Tosatti | QEMU supports PCI hotplug via ACPI, for PCI bus 0. This document |
| 5 | 9c046d96 | Marcelo Tosatti | describes the interface between QEMU and the ACPI BIOS. |
| 6 | 9c046d96 | Marcelo Tosatti | |
| 7 | 9c046d96 | Marcelo Tosatti | ACPI GPE block (IO ports 0xafe0-0xafe3, byte access): |
| 8 | 9c046d96 | Marcelo Tosatti | ----------------------------------------- |
| 9 | 9c046d96 | Marcelo Tosatti | |
| 10 | 9c046d96 | Marcelo Tosatti | Generic ACPI GPE block. Bit 1 (GPE.1) used to notify PCI hotplug/eject |
| 11 | 9c046d96 | Marcelo Tosatti | event to ACPI BIOS, via SCI interrupt. |
| 12 | 9c046d96 | Marcelo Tosatti | |
| 13 | 9c046d96 | Marcelo Tosatti | PCI slot injection notification pending (IO port 0xae00-0xae03, 4-byte access): |
| 14 | 9c046d96 | Marcelo Tosatti | --------------------------------------------------------------- |
| 15 | 9c046d96 | Marcelo Tosatti | Slot injection notification pending. One bit per slot. |
| 16 | 9c046d96 | Marcelo Tosatti | |
| 17 | 9c046d96 | Marcelo Tosatti | Read by ACPI BIOS GPE.1 handler to notify OS of injection |
| 18 | 9c046d96 | Marcelo Tosatti | events. |
| 19 | 9c046d96 | Marcelo Tosatti | |
| 20 | 9c046d96 | Marcelo Tosatti | PCI slot removal notification (IO port 0xae04-0xae07, 4-byte access): |
| 21 | 9c046d96 | Marcelo Tosatti | ----------------------------------------------------- |
| 22 | 9c046d96 | Marcelo Tosatti | Slot removal notification pending. One bit per slot. |
| 23 | 9c046d96 | Marcelo Tosatti | |
| 24 | 9c046d96 | Marcelo Tosatti | Read by ACPI BIOS GPE.1 handler to notify OS of removal |
| 25 | 9c046d96 | Marcelo Tosatti | events. |
| 26 | 9c046d96 | Marcelo Tosatti | |
| 27 | 9c046d96 | Marcelo Tosatti | PCI device eject (IO port 0xae08-0xae0b, 4-byte access): |
| 28 | 9c046d96 | Marcelo Tosatti | ---------------------------------------- |
| 29 | 9c046d96 | Marcelo Tosatti | |
| 30 | 9c046d96 | Marcelo Tosatti | Used by ACPI BIOS _EJ0 method to request device removal. One bit per slot. |
| 31 | 9c046d96 | Marcelo Tosatti | Reads return 0. |
| 32 | 9c046d96 | Marcelo Tosatti | |
| 33 | 9c046d96 | Marcelo Tosatti | PCI removability status (IO port 0xae0c-0xae0f, 4-byte access): |
| 34 | 9c046d96 | Marcelo Tosatti | ----------------------------------------------- |
| 35 | 9c046d96 | Marcelo Tosatti | |
| 36 | 9c046d96 | Marcelo Tosatti | Used by ACPI BIOS _RMV method to indicate removability status to OS. One |
| 37 | 9c046d96 | Marcelo Tosatti | bit per slot. |