Features/ACPITableGeneration: Difference between revisions
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* When started with -M 1.6, QEMU generates all ACPI tables and passes them to the BIOS | * When started with -M 1.6, QEMU generates all ACPI tables and passes them to the BIOS | ||
* When started with -M 1.5 and earlier, QEMU does not expose ACPI tables to BIOS | * When started with -M 1.5 and earlier, QEMU does not expose ACPI tables to BIOS (compatiblity mode) | ||
* BIOS includes generic code to load ACPI tables from QEMU and pass them to guest | * BIOS includes generic code to load ACPI tables from QEMU and pass them to guest | ||
Revision as of 14:05, 14 July 2013
Summary
Generation of ACPI tables for guest BIOS in the hypervisor
Owner
- Name: Michael S. Tsirkin
- Email: mst@redhat.com
Roadmap
Once implemented, QEMU will be able to extend information passed to Guest OS through ACPI tables without need for bios code changes. This is widely desired as a way to avoid the churn and proliferation of QEMU-specific interfaces associated with ACPI tables in bios code.
After QEMU 1.6
- When started with -M 1.6, QEMU generates all ACPI tables and passes them to the BIOS
- When started with -M 1.5 and earlier, QEMU does not expose ACPI tables to BIOS (compatiblity mode)
- BIOS includes generic code to load ACPI tables from QEMU and pass them to guest
Status
Patchset implementing this functionality has been posted. seabios patchset seems acceptable - all comments have been addressed. Addressing review comments on the QEMU patchset.
Future plans
It might (or might not) be interesting to use a similar mechanism to pass in other tables, not just ACPI. This is TBD.