Firmware based runtime operating system switch
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United States of America Patent
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Jun 27, 2017
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N/A
app pub date -
Sep 2, 2015
filing date -
Sep 2, 2014
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Abstract
Approaches for firmware-based runtime operating system switch. UEFI firmware receives a request to switch an active operating system on a device from a first operating system to a second operating system. The UEFI firmware changes the operational state of the first operating state to an ACPI S3 state. The UEFI firmware performs a set of ACPI S3 resume boot path operations on the second operating system to cause the second operating system to become the active operating system. The set of ACPI S3 resume boot path operations may be performed while the second operating system is loaded into a memory area inaccessible to the first operating system and the first operating system remains in the ACPI S3 state.
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